{
"info": {
"author": "Julien Desfossez",
"author_email": "jdesfossez@efficios.com",
"bugtrack_url": null,
"classifiers": [
"Development Status :: 4 - Beta",
"Intended Audience :: Developers",
"Intended Audience :: System Administrators",
"License :: OSI Approved :: MIT License",
"Programming Language :: Python :: 3.4",
"Topic :: System :: Monitoring"
],
"description": "LTTng analyses\n**************\n\n.. image:: https://img.shields.io/pypi/v/lttnganalyses.svg?label=Latest%20version\n :target: https://pypi.python.org/pypi/lttnganalyses\n :alt: Latest version released on PyPi\n\n.. image:: https://travis-ci.org/lttng/lttng-analyses.svg?branch=master&label=Travis%20CI%20build\n :target: https://travis-ci.org/lttng/lttng-analyses\n :alt: Status of Travis CI\n\n.. image:: https://img.shields.io/jenkins/s/https/ci.lttng.org/lttng-analyses_master_build.svg?label=LTTng%20CI%20build\n :target: https://ci.lttng.org/job/lttng-analyses_master_build\n :alt: Status of LTTng CI\n\nThe **LTTng analyses** are a set of various executable analyses to\nextract and visualize monitoring data and metrics from\n`LTTng `_ kernel traces on the command line.\n\nAs opposed to other \"live\" diagnostic or monitoring solutions, this\napproach is based on the following workflow:\n\n#. Record your system's activity with LTTng, a low-overhead tracer.\n#. Do whatever it takes for your problem to occur.\n#. Diagnose your problem's cause **offline** (when tracing is stopped).\n\nThis solution allows you to target problems that are hard to find and\nto \"dig\" until the root cause is found.\n\n**Current limitations**:\n\n- The LTTng analyses can be quite slow to execute. There are a number of\n places where they could be optimized, but using the Python interpreter\n seems to be an important impediment.\n\n This project is regarded by its authors as a testing ground to\n experiment analysis features, user interfaces, and usability in\n general. It is not considered ready to analyze long traces.\n\n**Contents**:\n\n.. contents::\n :local:\n :depth: 3\n :backlinks: none\n\n\nInstall LTTng analyses\n======================\n\n.. NOTE::\n\n The version 2.0 of `Trace Compass `_\n requires LTTng analyses 0.4: Trace Compass 2.0 is not compatible\n with LTTng analyses 0.5 and after.\n\n In this case, we suggest that you install LTTng analyses from the\n ``stable-0.4`` branch of the project's Git repository (see\n `Install from the Git repository`_). You can also\n `download `_ the\n latest 0.4 release tarball and follow the\n `Install from a release tarball`_ procedure.\n\n\nRequired dependencies\n---------------------\n\n- `Python `_ \u2265 3.4\n- `setuptools `_\n- `pyparsing `_ \u2265 2.0.0\n- `Babeltrace `_ \u2265 1.2 with Python\n bindings (``--enable-python-bindings`` when building from source)\n\n\nOptional dependencies\n---------------------\n\n- `LTTng `_ \u2265 2.5: to use the\n ``lttng-analyses-record`` script and to trace the system in\n general\n- `termcolor `_: color\n support\n- `progressbar `_:\n terminal progress bar support (this is not required for the\n machine interface's progress indication feature)\n\n\nInstall from PyPI (online repository)\n-------------------------------------\n\nTo install the latest LTTng analyses release on your system from\n`PyPI `_:\n\n#. Install the required dependencies.\n#. **Optional**: Install the optional dependencies.\n#. Make sure ``pip`` for Python 3 is installed on your system. The\n package is named ``python3-pip`` on most distributions\n (``python-pip`` on Arch Linux).\n#. Use ``pip3`` to install LTTng analyses:\n\n .. code-block:: bash\n\n sudo pip3 install --upgrade lttnganalyses\n\n Note that you can also install LTTng analyses locally, only for\n your user:\n\n .. code-block:: bash\n\n pip3 install --user --upgrade lttnganalyses\n\n Files are installed in ``~/.local``, therefore ``~/.local/bin`` must\n be part of your ``PATH`` environment variable for the LTTng analyses\n to be launchable.\n\n\nInstall from a release tarball\n------------------------------\n\nTo install a specific LTTng analyses release (tarball) on your system:\n\n#. Install the required dependencies.\n#. **Optional**: Install the optional dependencies.\n#. `Download `_ and\n extract the desired release tarball.\n#. Use ``setup.py`` to install LTTng analyses:\n\n .. code-block:: bash\n\n sudo ./setup.py install\n\n\nInstall from the Git repository\n-------------------------------\n\nTo install LTTng analyses from a specific branch or tag of the\nproject's Git repository:\n\n#. Install the required dependencies.\n#. **Optional**: Install the optional dependencies.\n#. Make sure ``pip`` for Python 3 is installed on your system. The\n package is named ``python3-pip`` on most distributions\n (``python-pip`` on Arch Linux).\n#. Use ``pip3`` to install LTTng analyses:\n\n .. code-block:: bash\n\n sudo pip3 install --upgrade git+git://github.com/lttng/lttng-analyses.git@master\n\n Replace ``master`` with the desired branch or tag name to install\n in the previous URL.\n\n Note that you can also install LTTng analyses locally, only for\n your user:\n\n .. code-block:: bash\n\n sudo pip3 install --user --upgrade git+git://github.com/lttng/lttng-analyses.git@master\n\n Files are installed in ``~/.local``, therefore ``~/.local/bin`` must\n be part of your ``PATH`` environment variable for the LTTng analyses\n to be launchable.\n\n\nInstall on Ubuntu\n-----------------\n\nTo install LTTng analyses on Ubuntu \u2265 12.04:\n\n#. Add the *LTTng Latest Stable* PPA repository:\n\n .. code-block:: bash\n\n sudo apt-get install -y software-properties-common\n sudo apt-add-repository -y ppa:lttng/ppa\n sudo apt-get update\n\n Replace ``software-properties-common`` with\n ``python-software-properties`` on Ubuntu 12.04.\n#. Install the required dependencies:\n\n .. code-block:: bash\n\n sudo apt-get install -y babeltrace\n sudo apt-get install -y python3-babeltrace\n sudo apt-get install -y python3-setuptools\n\n On Ubuntu > 12.04:\n\n .. code-block:: bash\n\n sudo apt-get install -y python3-pyparsing\n\n On Ubuntu 12.04:\n\n .. code-block:: bash\n\n sudo pip3 install --upgrade pyparsing\n#. **Optional**: Install the optional dependencies:\n\n .. code-block:: bash\n\n sudo apt-get install -y lttng-tools\n sudo apt-get install -y lttng-modules-dkms\n sudo apt-get install -y python3-progressbar\n sudo apt-get install -y python3-termcolor\n#. Install LTTng analyses:\n\n .. code-block:: bash\n\n sudo apt-get install -y python3-lttnganalyses\n\n\nInstall on Debian \"sid\"\n-----------------------\n\nTo install LTTng analyses on Debian \"sid\":\n\n#. Install the required dependencies:\n\n .. code-block:: bash\n\n sudo apt-get install -y babeltrace\n sudo apt-get install -y python3-babeltrace\n sudo apt-get install -y python3-setuptools\n sudo apt-get install -y python3-pyparsing\n#. **Optional**: Install the optional dependencies:\n\n .. code-block:: bash\n\n sudo apt-get install -y lttng-tools\n sudo apt-get install -y lttng-modules-dkms\n sudo apt-get install -y python3-progressbar\n sudo apt-get install -y python3-termcolor\n#. Install LTTng analyses:\n\n .. code-block:: bash\n\n sudo apt-get install -y python3-lttnganalyses\n\n\nRecord a trace\n==============\n\nThis section is a quick reminder of how to record an LTTng kernel\ntrace. See LTTng's `quick start guide\n`_ to familiarize\nwith LTTng.\n\n\nAutomatic\n---------\n\nLTTng analyses ships with a handy (installed) script,\n``lttng-analyses-record``, which automates\nthe steps to record a kernel trace with the events required by the\nanalyses.\n\nTo use ``lttng-analyses-record``:\n\n#. Launch the installed script:\n\n .. code-block:: bash\n\n lttng-analyses-record\n#. Do whatever it takes for your problem to occur.\n#. When you are done recording, press Ctrl+C where the script is\n running.\n\n\nManual\n------\n\nTo record an LTTng kernel trace suitable for the LTTng analyses:\n\n#. Create a tracing session:\n\n .. code-block:: bash\n\n sudo lttng create\n#. Create a channel with a large sub-buffer size:\n\n .. code-block:: bash\n\n sudo lttng enable-channel --kernel chan --subbuf-size=8M\n#. Create event rules to capture the needed events:\n\n .. code-block:: bash\n\n sudo lttng enable-event --kernel --channel=chan block_bio_backmerge\n sudo lttng enable-event --kernel --channel=chan block_bio_remap\n sudo lttng enable-event --kernel --channel=chan block_rq_complete\n sudo lttng enable-event --kernel --channel=chan block_rq_issue\n sudo lttng enable-event --kernel --channel=chan irq_handler_entry\n sudo lttng enable-event --kernel --channel=chan irq_handler_exit\n sudo lttng enable-event --kernel --channel=chan irq_softirq_entry\n sudo lttng enable-event --kernel --channel=chan irq_softirq_exit\n sudo lttng enable-event --kernel --channel=chan irq_softirq_raise\n sudo lttng enable-event --kernel --channel=chan kmem_mm_page_alloc\n sudo lttng enable-event --kernel --channel=chan kmem_mm_page_free\n sudo lttng enable-event --kernel --channel=chan lttng_statedump_block_device\n sudo lttng enable-event --kernel --channel=chan lttng_statedump_file_descriptor\n sudo lttng enable-event --kernel --channel=chan lttng_statedump_process_state\n sudo lttng enable-event --kernel --channel=chan mm_page_alloc\n sudo lttng enable-event --kernel --channel=chan mm_page_free\n sudo lttng enable-event --kernel --channel=chan net_dev_xmit\n sudo lttng enable-event --kernel --channel=chan netif_receive_skb\n sudo lttng enable-event --kernel --channel=chan sched_pi_setprio\n sudo lttng enable-event --kernel --channel=chan sched_process_exec\n sudo lttng enable-event --kernel --channel=chan sched_process_fork\n sudo lttng enable-event --kernel --channel=chan sched_switch\n sudo lttng enable-event --kernel --channel=chan sched_wakeup\n sudo lttng enable-event --kernel --channel=chan sched_waking\n sudo lttng enable-event --kernel --channel=chan softirq_entry\n sudo lttng enable-event --kernel --channel=chan softirq_exit\n sudo lttng enable-event --kernel --channel=chan softirq_raise\n sudo lttng enable-event --kernel --channel=chan --syscall --all\n#. Start recording:\n\n .. code-block:: bash\n\n sudo lttng start\n#. Do whatever it takes for your problem to occur.\n#. Stop recording and destroy the tracing session to free its\n resources:\n\n .. code-block:: bash\n\n sudo lttng stop\n sudo lttng destroy\n\n\nSee the `LTTng Documentation `_ for other\nuse cases, like sending the trace data over the network instead of\nrecording trace files on the target's file system.\n\n\nRun an LTTng analysis\n=====================\n\nThe **LTTng analyses** are a set of various command-line\nanalyses. Each analysis accepts the path to a recorded trace\n(see `Record a trace`_) as its argument, as well as various command-line\noptions to control the analysis and its output.\n\nMany command-line options are common to all the analyses, so that you\ncan filter by timerange, process name, process ID, minimum and maximum\nvalues, and the rest. Also note that the reported timestamps can\noptionally be expressed in the GMT time zone.\n\nEach analysis is installed as an executable starting with the\n``lttng-`` prefix.\n\n.. list-table:: Available LTTng analyses\n :header-rows: 1\n\n * - Command\n - Description\n * - ``lttng-cputop``\n - Per-TID, per-CPU, and total top CPU usage.\n * - ``lttng-iolatencyfreq``\n - I/O request latency distribution.\n * - ``lttng-iolatencystats``\n - Partition and system call latency statistics.\n * - ``lttng-iolatencytop``\n - Top system call latencies.\n * - ``lttng-iolog``\n - I/O operations log.\n * - ``lttng-iousagetop``\n - I/O usage top.\n * - ``lttng-irqfreq``\n - Interrupt handler duration frequency distribution.\n * - ``lttng-irqlog``\n - Interrupt log.\n * - ``lttng-irqstats``\n - Hardware and software interrupt statistics.\n * - ``lttng-memtop``\n - Per-TID top allocated/freed memory.\n * - ``lttng-schedfreq``\n - Scheduling latency frequency distribution.\n * - ``lttng-schedlog``\n - Scheduling top.\n * - ``lttng-schedstats``\n - Scheduling latency stats.\n * - ``lttng-schedtop``\n - Scheduling top.\n * - ``lttng-periodlog``\n - Period log.\n * - ``lttng-periodstats``\n - Period duration stats.\n * - ``lttng-periodtop``\n - Period duration top.\n * - ``lttng-periodfreq``\n - Period duration frequency distribution.\n * - ``lttng-syscallstats``\n - Per-TID and global system call statistics.\n\nUse the ``--help`` option of any command to list the descriptions\nof the possible command-line options.\n\n.. NOTE::\n\n You can set the ``LTTNG_ANALYSES_DEBUG`` environment variable to\n ``1`` when you launch an analysis to enable a debug output. You can\n also use the general ``--debug`` option.\n\n\nFiltering options\n-----------------\n\nDepending on the analysis, filter options are available. The complete\nlist of filter options is:\n\n.. list-table:: Available filtering command-line options\n :header-rows: 1\n\n * - Command-line option\n - Description\n * - ``--begin``\n - Trace time at which to begin the analysis.\n\n Format: ``HH:MM:SS[.NNNNNNNNN]``.\n * - ``--cpu``\n - Comma-delimited list of CPU IDs for which to display the\n results.\n * - ``--end``\n - Trace time at which to end the analysis.\n\n Format: ``HH:MM:SS[.NNNNNNNNN]``.\n * - ``--irq``\n - List of hardware IRQ numbers for which to display the results.\n * - ``--limit``\n - Maximum number of output rows per table. This option is useful\n for \"top\" analyses, like ``lttng-cputop``.\n * - ``--min``\n - Minimum duration (\u00b5s) to keep in results.\n * - ``--minsize``\n - Minimum I/O operation size (B) to keep in results.\n * - ``--max``\n - Maximum duration (\u00b5s) to keep in results.\n * - ``--maxsize``\n - Maximum I/O operation size (B) to keep in results.\n * - ``--procname``\n - Comma-delimited list of process names for which to display\n the results.\n * - ``--softirq``\n - List of software IRQ numbers for which to display the results.\n * - ``--tid``\n - Comma-delimited list of thread IDs for which to display the\n results.\n\n\nPeriod options\n--------------\n\nLTTng analyses feature a powerful \"period engine\". A *period* is an\ninterval which begins and ends under specific conditions. When the\nanalysis results are displayed, they are isolated for the periods\nthat were opened and closed during the process.\n\nA period can have a parent. If it's the case, then its parent needs\nto exist for the period to begin at all. This tree structure of\nperiods is useful to keep a form of custom user state during the\ngeneric kernel analysis.\n\n.. ATTENTION::\n\n The ``--period`` and ``--period-captures`` options's arguments\n include characters that are considered special by most shells,\n like ``$``, ``*``, and ``&``.\n\n Make sure to always **single-quote** those arguments when running\n the LTTng analyses on the command line.\n\n\nPeriod definition\n~~~~~~~~~~~~~~~~~\n\nYou can define one or more periods on the command line, when launching\nan analysis, with the ``--period`` option. This option's argument\naccepts the following form (content within square brackets is optional)::\n\n [ NAME [ (PARENT) ] ] : BEGINEXPR [ : ENDEXPR ]\n\n``NAME``\n Optional name of the period definition. All periods opened from this\n definition have this name.\n\n The syntax of this name is the same as a C identifier.\n\n``PARENT``\n Optional name of a *previously defined* period which acts as the\n parent period definition of this definition.\n\n ``NAME`` must be set for ``PARENT`` to be set.\n\n``BEGINEXPR``\n Matching expression which a given event must match in order for an\n actual period to be instantiated by this definition.\n\n``ENDEXPR``\n Matching expression which a given event must match in order for an\n instance of this definition to be closed.\n\n If this part is omitted, ``BEGINEXPR`` is used for the ending\n expression too.\n\n\nMatching expression\n...................\n\nA matching expression is a C-like logical expression. It supports\nnesting expressions with ``(`` and ``)``, as well as the ``&&`` (logical\n*AND*), ``||`` (logical *OR*), and ``!`` (logical *NOT*) operators. The\nprecedence of those operators is the same as in the C language.\n\nThe atomic operands in those logical expressions are comparisons. For\nthe following comparison syntaxes, consider that:\n\n- ``EVT`` indicates an event source. The available event sources are:\n\n ``$evt``\n Current event.\n\n ``$begin.$evt``\n In ``BEGINEXPR``: current event (same as ``$evt``).\n\n In ``ENDEXPR``: event which, for this period instance, was matched\n when ``BEGINEXPR`` was evaluated.\n\n ``$parent.$begin.$evt``\n Event which, for the parent period instance of this period instance,\n was matched when ``BEGINEXPR`` of the parent was evaluated.\n- ``FIELD`` indicates an event field source. The available event field\n sources are:\n\n ``NAME`` (direct field name)\n Automatic scope: try to find the field named ``NAME`` in the dynamic\n scopes in this order:\n\n #. Event payload\n #. Event context\n #. Event header\n #. Stream event context\n #. Packet context\n #. Packet header\n\n ``$payload.NAME``\n Event payload field named ``NAME``.\n\n ``$ctx.NAME``\n Event context field named ``NAME``.\n\n ``$header.NAME``\n Event header field named ``NAME``.\n\n ``$stream_ctx.NAME``\n Stream event context field named ``NAME``.\n\n ``$pkt_ctx.NAME``\n Packet context field named ``NAME``.\n\n ``$pkt_header.NAME``\n Packet header field named ``NAME``.\n- ``VALUE`` indicates one of:\n\n - A constant, decimal number. This can be an integer or a real\n number, positive or negative, and supports the ``e`` scientific\n notation.\n\n Examples: ``23``, ``-18.28``, ``7.2e9``.\n - A double-quoted literal string. ``\"`` and ``\\`` can be escaped\n with ``\\``.\n\n Examples: ``\"hello, world!\"``, ``\"here's another \\\"quoted\\\" string\"``.\n - An event field, that is, ``EVT.FIELD``, considering the replacements\n described above.\n\n- ``NUMVALUE`` indicates one of:\n\n - A constant, decimal number. This can be an integer or a real\n number, positive or negative, and supports the ``e`` scientific\n notation.\n\n Examples: ``23``, ``-18.28``, ``7.2e9``.\n - An event field, that is, ``EVT.FIELD``, considering the replacements\n described above.\n\n.. list-table:: Available comparison syntaxes for matching expressions\n :header-rows: 1\n\n * - Comparison syntax\n - Description\n * - #. ``EVT.$name == \"NAME\"``\n #. ``EVT.$name != \"NAME\"``\n #. ``EVT.$name =* \"PATTERN\"``\n - Name matching:\n\n #. Name of event source ``EVT`` is equal to ``NAME``.\n #. Name of event source ``EVT`` is not equal to ``NAME``.\n #. Name of event source ``EVT`` satisfies the globbing pattern\n ``PATTERN``\n (see `fnmatch `_).\n * - #. ``EVT.FIELD == VALUE``\n #. ``EVT.FIELD != VALUE``\n #. ``EVT.FIELD < NUMVALUE``\n #. ``EVT.FIELD <= NUMVALUE``\n #. ``EVT.FIELD > NUMVALUE``\n #. ``EVT.FIELD >= NUMVALUE``\n #. ``EVT.FIELD =* \"PATTERN\"``\n - Value matching:\n\n #. The value of the field ``EVT.FIELD`` is equal\n to the value ``VALUE``.\n #. The value of the field ``EVT.FIELD`` is not\n equal to the value ``VALUE``.\n #. The value of the field ``EVT.FIELD`` is lesser\n than the value ``NUMVALUE``.\n #. The value of the field ``EVT.FIELD`` is lesser\n than or equal to the value ``NUMVALUE``.\n #. The value of the field ``EVT.FIELD`` is greater\n than the value ``NUMVALUE``.\n #. The value of the field ``EVT.FIELD`` is greater\n than or equal to the value ``NUMVALUE``.\n #. The value of the field ``EVT.FIELD`` satisfies\n the globbing pattern ``PATTERN``\n (see `fnmatch `_).\n\nIn any case, if ``EVT.FIELD`` does not target an existing field, the\ncomparison including it fails. Also, string fields cannot be compared to\nnumber values (constant or fields).\n\n\nExamples\n........\n\n- Create a period instance named ``switch`` when:\n\n - The current event name is ``sched_switch``.\n\n End this period instance when:\n\n - The current event name is ``sched_switch``.\n\n Period definition::\n\n switch : $evt.$name == \"sched_switch\"\n\n- Create a period instance named ``switch`` when:\n\n - The current event name is ``sched_switch`` *AND*\n - The current event's ``next_tid`` field is *NOT* equal to 0.\n\n End this period instance when:\n\n - The current event name is ``sched_switch`` *AND*\n - The current event's ``prev_tid`` field is equal to\n the ``next_tid`` field of the matched event in the begin expression *AND*\n - The current event's ``cpu_id`` field is equal to\n the ``cpu_id`` field of the matched event in the begin expression.\n\n Period definition::\n\n switch\n : $evt.$name == \"sched_switch\" &&\n $evt.next_tid != 0\n : $evt.$name == \"sched_switch\" &&\n $evt.prev_tid == $begin.$evt.next_tid &&\n $evt.cpu_id == $begin.$evt.cpu_id\n\n- Create a period instance named ``irq`` when:\n\n - A parent period instance named ``switch`` is currently opened.\n - The current event name satisfies the ``irq_*_entry`` globbing\n pattern *AND*\n - The current event's ``cpu_id`` field is equal to the ``cpu_id``\n field of the matched event in the begin expression of the parent\n period instance.\n\n End this period instance when:\n\n - The current event name is ``irq_handler_exit`` *AND*\n - The current event's ``cpu_id`` field is equal to\n the ``cpu_id`` field of the matched event in the begin expression.\n\n Period definition::\n\n irq(switch)\n : $evt.$name =* \"irq_*_entry\" &&\n $evt.cpu_id == $parent.$begin.$evt.cpu_id\n : $evt.$name == \"irq_handler_exit\" &&\n $evt.cpu_id == $begin.$evt.cpu_id\n\n- Create a period instance named ``hello`` when:\n\n - The current event name satisfies the ``hello*`` globbing pattern,\n but excludes ``hello world``.\n\n End this period instance when:\n\n - The current event name is the same as the name of the matched event\n in the begin expression *AND*\n - The current event's ``theid`` header field is lesser than or equal\n to 231.\n\n Period definition::\n\n hello\n : $evt.$name =* \"hello*\" &&\n $evt.$name != \"hello world\"\n : $evt.$name == $begin.$evt.$name &&\n $evt.$header.theid <= 231\n\n\nPeriod captures\n~~~~~~~~~~~~~~~\n\nWhen a period instance begins or ends, the analysis can capture the\ncurrent values of specific event fields and display them in its\nresults.\n\nYou can set period captures with the ``--period-captures`` command-line\noption. This option's argument accepts the following form\n(content within square brackets is optional)::\n\n NAME : BEGINCAPTURES [ : ENDCAPTURES ]\n\n``NAME``\n Name of period instances on which to apply those captures.\n\n A ``--period`` option in the same command line must define this name.\n\n``BEGINCAPTURES``\n Comma-delimited list of event fields to capture when the beginning\n expression of the period definition named ``NAME`` is matched.\n\n``ENDCAPTURES``\n Comma-delimited list of event fields to capture when the ending\n expression of the period definition named ``NAME`` is matched.\n\n If this part is omitted, there are no end captures.\n\nThe format of ``BEGINCAPTURES`` and ``ENDCAPTURES`` is a comma-delimited\nlist of tokens having this format::\n\n [ CAPTURENAME = ] EVT.FIELD\n\nor::\n\n [ CAPTURENAME = ] EVT.$name\n\n``CAPTURENAME``\n Custom name for this capture. The syntax of this name is the same as\n a C identifier.\n\n If this part is omitted, the literal expression used for ``EVT.FIELD``\n is used.\n\n``EVT`` and ``FIELD``\n See `Matching expression`_.\n\n\nPeriod select and aggregate parameters\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n\nWith ``lttng-periodlog``, it is possible to see the list of periods in the\ncontext of their parent. By specifying the ``--aggregate-by``, the lines in\nthe log present on the same line the timerange of the period specified by\nthe ``--select`` argument at the timerange of the parent period that contains\nit. In ``lttng-periodstats`` and ``lttng-periodfreq``, these two flags are\nused as filter to limit the output to only the relevant periods. If omitted,\nall existing combinations of parent/child statistics and frequency\ndistributions are output.\n\n\nGrouping\n~~~~~~~~\n\nWhen fields are captured during the period analyses, it is possible to compute\nthe statistics and frequency distribution grouped by values of the these\nfields, instead of globally for the trace. The format is::\n\n --group-by \"PERIODNAME.CAPTURENAME[, PERIODNAME.CAPTURENAME]\"\n\nIf multiple values are passed, the analysis outputs one list of tables\n(statistics and/or frequency distribution) for each unique combination of the\nfield's values.\n\nFor example, if we track the ``open`` system call and we are interested in the\naverage duration of this call by filename, we only have to capture the filename\nfield and group the results by ``open.filename``.\n\n\nExamples\n........\n\nBegin captures only::\n\n switch\n : $evt.next_tid,\n name = $evt.$name,\n msg_id = $parent.$begin.$evt.id\n\nBegin and end captures::\n\n hello\n : beginning = $evt.$ctx.begin_ts,\n $evt.received_bytes\n : $evt.send_bytes,\n $evt.$name,\n begin = $begin.$evt.$ctx.begin_ts\n end = $evt.$ctx.end_ts\n\nTop scheduling latency (delay between ``sched_waking(tid=$TID)`` and ``sched_switch(next_tid=$TID)``)\nwith recording of the procname of the waker (dependant of the ``procname`` context in the trace),\npriority and target CPU:\n\n.. code-block:: bash\n\n lttng-periodtop /path/to/trace \\\n --period 'wake : $evt.$name == \"sched_waking\" : $evt.$name == \"sched_switch\" && $evt.next_tid == $begin.$evt.$payload.tid' \\\n --period-capture 'wake : waker = $evt.procname, prio = $evt.prio : wakee = $evt.next_comm, cpu = $evt.cpu_id'\n\n::\n\n Timerange: [2016-07-21 17:07:47.832234248, 2016-07-21 17:07:48.948152659]\n Period top\n Begin End Duration (us) Name Begin capture End capture\n [17:07:47.835338581, 17:07:47.946834976] 111496.395 wake waker = lttng-consumerd wakee = kworker/0:2\n prio = 20 cpu = 0\n [17:07:47.850409057, 17:07:47.946829256] 96420.199 wake waker = swapper/2 wakee = migration/0\n prio = -100 cpu = 0\n [17:07:48.300313282, 17:07:48.300993892] 680.610 wake waker = Xorg wakee = ibus-ui-gtk3\n prio = 20 cpu = 3\n [17:07:48.300330060, 17:07:48.300920648] 590.588 wake waker = Xorg wakee = ibus-x11\n prio = 20 cpu = 3\n\n\nLog of all the IRQ handled while a user-space process was running, capture the procname of the process interrupted, the name and number of the IRQ:\n\n.. code-block:: bash\n\n lttng-periodlog /path/to/trace \\\n --period 'switch : $evt.$name == \"sched_switch\" && $evt.next_tid != 0 : $evt.$name == \"sched_switch\" && $evt.prev_tid == $begin.$evt.next_tid && $evt.cpu_id == $begin.$evt.cpu_id' \\\n --period 'irq(switch) : $evt.$name == \"irq_handler_entry\" && $evt.cpu_id == $parent.$begin.$evt.cpu_id : $evt.$name == \"irq_handler_exit\" && $evt.cpu_id == $begin.$evt.cpu_id' \\\n --period-capture 'irq : name = $evt.name, irq = $evt.irq, current = $parent.$begin.$evt.next_comm'\n\n::\n\n Period log\n Begin End Duration (us) Name Begin capture End capture\n [10:58:26.169238875, 10:58:26.169244920] 6.045 switch\n [10:58:26.169598385, 10:58:26.169602967] 4.582 irq name = ahci\n irq = 41\n current = lttng-consumerd\n [10:58:26.169811553, 10:58:26.169816218] 4.665 irq name = ahci\n irq = 41\n current = lttng-consumerd\n [10:58:26.170025600, 10:58:26.170030197] 4.597 irq name = ahci\n irq = 41\n current = lttng-consumerd\n [10:58:26.169236842, 10:58:26.170105711] 868.869 switch\n\n\nLog of all the ``open`` system call periods aggregated by the ``sched_switch`` in which they occurred:\n\n.. code-block:: bash\n\n lttng-periodlog /path/to/trace \\\n --period 'switch : $evt.$name == \"sched_switch\" : $evt.$name == \"sched_switch\" && $begin.$evt.next_tid == $evt.prev_tid && $begin.$evt.cpu_id == $evt.cpu_id' \\\n --period 'open(switch) : $evt.$name == \"syscall_entry_open\" && $parent.$begin.$evt.cpu_id == $evt.cpu_id : $evt.$name == \"syscall_exit_open\" && $begin.$evt.cpu_id == $evt.cpu_id' \\\n --period-captures 'switch : comm = $evt.next_comm, cpu = $evt.cpu_id, tid = $evt.next_tid' \\\n --period-captures 'open : filename = $evt.filename : fd = $evt.ret' \\\n --select open\n --aggregate-by switch\n\n::\n\n Aggregated log\n Aggregation of (open) by switch\n Parent | | Durations (us) |\n Begin End Duration (us) Name | Child name Count | Min Avg Max Stdev Runtime | Parent captures\n [10:58:26.222823677, 10:58:26.224039381] 1215.704 switch | switch/open 3 | 7.517 9.548 11.248 1.887 28.644 | switch.comm = bash, switch.cpu = 3, switch.tid = 12420\n [10:58:26.856224058, 10:58:26.856589867] 365.809 switch | switch/open 1 | 77.620 77.620 77.620 ? 77.620 | switch.comm = ntpd, switch.cpu = 0, switch.tid = 11132\n [10:58:27.000068031, 10:58:27.000954859] 886.828 switch | switch/open 15 | 9.224 16.126 37.190 6.681 241.894 | switch.comm = irqbalance, switch.cpu = 0, switch.tid = 1656\n [10:58:27.225474282, 10:58:27.229160014] 3685.732 switch | switch/open 22 | 5.797 6.767 9.308 0.972 148.881 | switch.comm = bash, switch.cpu = 1, switch.tid = 12421\n\n\nStatistics about the memory allocation performed within an ``open`` system call\nwithin a single ``sched_switch`` (no blocking or preemption):\n\n.. code-block:: bash\n\n lttng-periodstats /path/to/trace \\\n --period 'switch : $evt.$name == \"sched_switch\" : $evt.$name == \"sched_switch\" && $begin.$evt.next_tid == $evt.prev_tid && $begin.$evt.cpu_id == $evt.cpu_id' \\\n --period 'open(switch) : $evt.$name == \"syscall_entry_open\" && $parent.$begin.$evt.cpu_id == $evt.cpu_id : $evt.$name == \"syscall_exit_open\" && $begin.$evt.cpu_id == $evt.cpu_id' \\\n --period 'alloc(open) : $evt.$name == \"kmem_cache_alloc\" && $parent.$begin.$evt.cpu_id == $evt.cpu_id : $evt.$name == \"kmem_cache_free\" && $evt.ptr == $begin.$evt.ptr' \\\n --period-captures 'switch : comm = $evt.next_comm, cpu = $evt.cpu_id, tid = $evt.next_tid' \\\n --period-captures 'open : filename = $evt.filename : fd = $evt.ret' \\\n --period-captures 'alloc : ptr = $evt.ptr'\n\n::\n\n Timerange: [2015-01-06 10:58:26.140545481, 2015-01-06 10:58:27.229358936]\n Period tree:\n switch\n |-- open\n |-- alloc\n\n Period statistics (us)\n Period Count Min Avg Max Stdev Runtime\n switch 831 2.824 5233.363 172056.802 16197.531 4348924.614\n switch/open 41 5.797 12.123 77.620 12.076 497.039\n switch/open/alloc 44 1.152 10.277 74.476 11.582 452.175\n\n Per-parent period duration statistics (us)\n With active children\n Period Parent Min Avg Max Stdev\n switch/open switch 28.644 124.260 241.894 92.667\n switch/open/alloc switch 24.036 113.044 229.713 87.827\n switch/open/alloc switch/open 4.550 11.029 74.476 11.768\n\n Per-parent duration ratio (%)\n With active children\n Period Parent Min Avg Max Stdev\n switch/open switch 2 13.723 27 12.421\n switch/open/alloc switch 1 12.901 25 12.041\n switch/open/alloc switch/open 76 88.146 115 7.529\n\n Per-parent period count statistics\n With active children\n Period Parent Min Avg Max Stdev\n switch/open switch 1 10.250 22 9.979\n switch/open/alloc switch 1 11.000 22 10.551\n switch/open/alloc switch/open 1 1.073 2 0.264\n\n Per-parent period duration statistics (us)\n Globally\n Period Parent Min Avg Max Stdev\n switch/open switch 0.000 0.598 241.894 10.251\n switch/open/alloc switch 0.000 0.544 229.713 9.443\n switch/open/alloc switch/open 4.550 11.029 74.476 11.768\n\n Per-parent duration ratio (%)\n Globally\n Period Parent Min Avg Max Stdev\n switch/open switch 0 0.066 27 1.209\n switch/open/alloc switch 0 0.062 25 1.150\n switch/open/alloc switch/open 76 88.146 115 7.529\n\n Per-parent period count statistics\n Globally\n Period Parent Min Avg Max Stdev\n switch/open switch 0 0.049 22 0.929\n switch/open/alloc switch 0 0.053 22 0.991\n switch/open/alloc switch/open 1 1.073 2 0.264\n\n\nThese statistics can also be scoped by value of the FD returned by the ``open``\nsystem, by appending ``--group-by \"open.fd\"`` to the previous command line.\nThat way previous tables will be output for each value of FD returned, so it\nis possible to observe the behaviour based on the parameters of a system call.\n\nUsing the ``lttng-periodfreq`` or the ``--freq`` parameter, these tables can\nalso be presented as frequency distributions.\n\n\nProgress options\n----------------\n\nIf the `progressbar `_\noptional dependency is installed, a progress bar is available to\nindicate the progress of the analysis.\n\nBy default, the progress bar is based on the current event's timestamp.\n\nProgress options are:\n\n.. list-table:: Available progress command-line options\n :header-rows: 1\n\n * - Command-line option\n - Description\n * - ``--no-progress``\n - Disable the progress bar.\n * - ``--progress-use-size``\n - Use the approximate event size instead of the current event's\n timestamp to estimate the progress value.\n\n\nMachine interface\n-----------------\n\nIf you want to display LTTng analyses results in a custom viewer,\nyou can use the JSON-based LTTng analyses machine interface (LAMI).\nEach command in the previous table has its corresponding LAMI version\nwith the ``-mi`` suffix. For example, the LAMI version of\n``lttng-cputop`` is ``lttng-cputop-mi``.\n\nThis version of LTTng analyses conforms to\n`LAMI 1.0 `_.\n\n\n\n\n\nExamples\n========\n\nThis section shows a few examples of using some LTTng analyses.\n\nI/O\n---\n\nPartition and system call latency statistics\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n\n.. code-block:: bash\n\n lttng-iolatencystats /path/to/trace\n\n::\n\n Timerange: [2015-01-06 10:58:26.140545481, 2015-01-06 10:58:27.229358936]\n Syscalls latency statistics (usec):\n Type Count Min Average Max Stdev\n -----------------------------------------------------------------------------------------\n Open 45 5.562 13.835 77.683 15.263\n Read 109 0.316 5.774 62.569 9.277\n Write 101 0.256 7.060 48.531 8.555\n Sync 207 19.384 40.664 160.188 21.201\n\n Disk latency statistics (usec):\n Name Count Min Average Max Stdev\n -----------------------------------------------------------------------------------------\n dm-0 108 0.001 0.004 0.007 1.306\n\n\nI/O request latency distribution\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n\n.. code-block:: bash\n\n lttng-iolatencyfreq /path/to/trace\n\n::\n\n Timerange: [2015-01-06 10:58:26.140545481, 2015-01-06 10:58:27.229358936]\n Open latency distribution (usec)\n ###############################################################################\n 5.562 \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 25\n 9.168 \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 4\n 12.774 \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 8\n 16.380 \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 3\n 19.986 \u2588\u2588\u2588\u2588\u2588 2\n 23.592 0\n 27.198 0\n 30.804 0\n 34.410 \u2588\u2588 1\n 38.016 0\n 41.623 0\n 45.229 0\n 48.835 0\n 52.441 0\n 56.047 0\n 59.653 0\n 63.259 0\n 66.865 0\n 70.471 0\n 74.077 \u2588\u2588\u2588\u2588\u2588 2\n\n\nTop system call latencies\n~~~~~~~~~~~~~~~~~~~~~~~~~\n\n.. code-block:: bash\n\n lttng-iolatencytop /path/to/trace --limit=3 --minsize=2\n\n::\n\n Checking the trace for lost events...\n Timerange: [2015-01-15 12:18:37.216484041, 2015-01-15 12:18:53.821580313]\n Top open syscall latencies (usec)\n Begin End Name Duration (usec) Size Proc PID Filename\n [12:18:50.432950815,12:18:50.870648568] open 437697.753 N/A apache2 31517 /var/lib/php5/sess_0ifir2hangm8ggaljdphl9o5b5 (fd=13)\n [12:18:52.946080165,12:18:52.946132278] open 52.113 N/A apache2 31588 /var/lib/php5/sess_mr9045p1k55vin1h0vg7rhgd63 (fd=13)\n [12:18:46.800846035,12:18:46.800874916] open 28.881 N/A apache2 31591 /var/lib/php5/sess_r7c12pccfvjtas15g3j69u14h0 (fd=13)\n [12:18:51.389797604,12:18:51.389824426] open 26.822 N/A apache2 31520 /var/lib/php5/sess_4sdb1rtjkhb78sabnoj8gpbl00 (fd=13)\n\n Top read syscall latencies (usec)\n Begin End Name Duration (usec) Size Proc PID Filename\n [12:18:37.256073107,12:18:37.256555967] read 482.860 7.00 B bash 10237 unknown (origin not found) (fd=3)\n [12:18:52.000209798,12:18:52.000252304] read 42.506 1.00 KB irqbalance 1337 /proc/interrupts (fd=3)\n [12:18:37.256559439,12:18:37.256601615] read 42.176 5.00 B bash 10237 unknown (origin not found) (fd=3)\n [12:18:42.000281918,12:18:42.000320016] read 38.098 1.00 KB irqbalance 1337 /proc/interrupts (fd=3)\n\n Top write syscall latencies (usec)\n Begin End Name Duration (usec) Size Proc PID Filename\n [12:18:49.913241516,12:18:49.915908862] write 2667.346 95.00 B apache2 31584 /var/log/apache2/access.log (fd=8)\n [12:18:37.472823631,12:18:37.472859836] writev 36.205 21.97 KB apache2 31544 unknown (origin not found) (fd=12)\n [12:18:37.991578372,12:18:37.991612724] writev 34.352 21.97 KB apache2 31589 unknown (origin not found) (fd=12)\n [12:18:39.547778549,12:18:39.547812515] writev 33.966 21.97 KB apache2 31584 unknown (origin not found) (fd=12)\n\n Top sync syscall latencies (usec)\n Begin End Name Duration (usec) Size Proc PID Filename\n [12:18:50.162776739,12:18:51.157522361] sync 994745.622 N/A sync 22791 None (fd=None)\n [12:18:37.227867532,12:18:37.232289687] sync_file_range 4422.155 N/A lttng-consumerd 19964 /home/julien/lttng-traces/analysis-20150115-120942/kernel/metadata (fd=32)\n [12:18:37.238076585,12:18:37.239012027] sync_file_range 935.442 N/A lttng-consumerd 19964 /home/julien/lttng-traces/analysis-20150115-120942/kernel/metadata (fd=32)\n [12:18:37.220974711,12:18:37.221647124] sync_file_range 672.413 N/A lttng-consumerd 19964 /home/julien/lttng-traces/analysis-20150115-120942/kernel/metadata (fd=32)\n\n\nI/O operations log\n~~~~~~~~~~~~~~~~~~\n\n.. code-block:: bash\n\n lttng-iolog /path/to/trace\n\n::\n\n [10:58:26.221618530,10:58:26.221620659] write 2.129 8.00 B /usr/bin/x-term 11793 anon_inode:[eventfd] (fd=5)\n [10:58:26.221623609,10:58:26.221628055] read 4.446 50.00 B /usr/bin/x-term 11793 /dev/ptmx (fd=24)\n [10:58:26.221638929,10:58:26.221640008] write 1.079 8.00 B /usr/bin/x-term 11793 anon_inode:[eventfd] (fd=5)\n [10:58:26.221676232,10:58:26.221677385] read 1.153 8.00 B /usr/bin/x-term 11793 anon_inode:[eventfd] (fd=5)\n [10:58:26.223401804,10:58:26.223411683] open 9.879 N/A sleep 12420 /etc/ld.so.cache (fd=3)\n [10:58:26.223448060,10:58:26.223455577] open 7.517 N/A sleep 12420 /lib/x86_64-linux-gnu/libc.so.6 (fd=3)\n [10:58:26.223456522,10:58:26.223458898] read 2.376 832.00 B sleep 12420 /lib/x86_64-linux-gnu/libc.so.6 (fd=3)\n [10:58:26.223918068,10:58:26.223929316] open 11.248 N/A sleep 12420 (fd=3)\n [10:58:26.231881565,10:58:26.231895970] writev 14.405 16.00 B /usr/bin/x-term 11793 socket:[45650] (fd=4)\n [10:58:26.231979636,10:58:26.231988446] recvmsg 8.810 16.00 B Xorg 1827 socket:[47480] (fd=38)\n\n\nI/O usage top\n~~~~~~~~~~~~~\n\n.. code-block:: bash\n\n lttng-iousagetop /path/to/trace\n\n::\n\n Timerange: [2014-10-07 16:36:00.733214969, 2014-10-07 16:36:18.804584183]\n Per-process I/O Read\n ###############################################################################\n \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 16.00 MB lttng-consumerd (2619) 0 B file 4.00 B net 16.00 MB unknown\n \u2588\u2588\u2588\u2588\u2588 1.72 MB lttng-consumerd (2619) 0 B file 0 B net 1.72 MB unknown\n \u2588 398.13 KB postgres (4219) 121.05 KB file 277.07 KB net 8.00 B unknown\n 256.09 KB postgres (1348) 0 B file 255.97 KB net 117.00 B unknown\n 204.81 KB postgres (4218) 204.81 KB file 0 B net 0 B unknown\n 123.77 KB postgres (4220) 117.50 KB file 6.26 KB net 8.00 B unknown\n Per-process I/O Write\n ###############################################################################\n \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 16.00 MB lttng-consumerd (2619) 0 B file 8.00 MB net 8.00 MB unknown\n \u2588\u2588\u2588\u2588\u2588\u2588 2.20 MB postgres (4219) 2.00 MB file 202.23 KB net 0 B unknown\n \u2588\u2588\u2588\u2588\u2588 1.73 MB lttng-consumerd (2619) 0 B file 887.73 KB net 882.58 KB unknown\n \u2588\u2588 726.33 KB postgres (1165) 8.00 KB file 6.33 KB net 712.00 KB unknown\n 158.69 KB postgres (1168) 158.69 KB file 0 B net 0 B unknown\n 80.66 KB postgres (1348) 0 B file 80.66 KB net 0 B unknown\n Files Read\n ###############################################################################\n \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 8.00 MB anon_inode:[lttng_stream] (lttng-consumerd) 'fd 32 in lttng-consumerd (2619)'\n \u2588\u2588\u2588\u2588\u2588 834.41 KB base/16384/pg_internal.init 'fd 7 in postgres (4219)', 'fd 7 in postgres (4220)', 'fd 7 in postgres (4221)', 'fd 7 in postgres (4222)', 'fd 7 in postgres (4223)', 'fd 7 in postgres (4224)', 'fd 7 in postgres (4225)', 'fd 7 in postgres (4226)'\n \u2588 256.09 KB socket:[8893] (postgres) 'fd 9 in postgres (1348)'\n \u2588 174.69 KB pg_stat_tmp/pgstat.stat 'fd 9 in postgres (4218)', 'fd 9 in postgres (1167)'\n 109.48 KB global/pg_internal.init 'fd 7 in postgres (4218)', 'fd 7 in postgres (4219)', 'fd 7 in postgres (4220)', 'fd 7 in postgres (4221)', 'fd 7 in postgres (4222)', 'fd 7 in postgres (4223)', 'fd 7 in postgres (4224)', 'fd 7 in postgres (4225)', 'fd 7 in postgres (4226)'\n 104.30 KB base/11951/pg_internal.init 'fd 7 in postgres (4218)'\n 12.85 KB socket (lttng-sessiond) 'fd 30 in lttng-sessiond (384)'\n 4.50 KB global/pg_filenode.map 'fd 7 in postgres (4218)', 'fd 7 in postgres (4219)', 'fd 7 in postgres (4220)', 'fd 7 in postgres (4221)', 'fd 7 in postgres (4222)', 'fd 7 in postgres (4223)', 'fd 7 in postgres (4224)', 'fd 7 in postgres (4225)', 'fd 7 in postgres (4226)'\n 4.16 KB socket (postgres) 'fd 9 in postgres (4226)'\n 4.00 KB /proc/interrupts 'fd 3 in irqbalance (1104)'\n Files Write\n ###############################################################################\n \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 8.00 MB socket:[56371] (lttng-consumerd) 'fd 30 in lttng-consumerd (2619)'\n \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 8.00 MB pipe:[53306] (lttng-consumerd) 'fd 12 in lttng-consumerd (2619)'\n \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 1.76 MB pg_xlog/00000001000000000000000B 'fd 31 in postgres (4219)'\n \u2588\u2588\u2588\u2588\u2588 887.82 KB socket:[56369] (lttng-consumerd) 'fd 26 in lttng-consumerd (2619)'\n \u2588\u2588\u2588\u2588\u2588 882.58 KB pipe:[53309] (lttng-consumerd) 'fd 18 in lttng-consumerd (2619)'\n 160.00 KB /var/lib/postgresql/9.1/main/base/16384/16602 'fd 14 in postgres (1165)'\n 158.69 KB pg_stat_tmp/pgstat.tmp 'fd 3 in postgres (1168)'\n 144.00 KB /var/lib/postgresql/9.1/main/base/16384/16613 'fd 12 in postgres (1165)'\n 88.00 KB /var/lib/postgresql/9.1/main/base/16384/16609 'fd 11 in postgres (1165)'\n 78.28 KB socket:[8893] (postgres) 'fd 9 in postgres (1348)'\n Block I/O Read\n ###############################################################################\n Block I/O Write\n ###############################################################################\n \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 1.76 MB postgres (pid=4219)\n \u2588\u2588\u2588\u2588 160.00 KB postgres (pid=1168)\n \u2588\u2588 100.00 KB kworker/u8:0 (pid=1540)\n \u2588\u2588 96.00 KB jbd2/vda1-8 (pid=257)\n \u2588 40.00 KB postgres (pid=1166)\n 8.00 KB kworker/u9:0 (pid=4197)\n 4.00 KB kworker/u9:2 (pid=1381)\n Disk nr_sector\n ###############################################################################\n \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 4416.00 sectors vda1\n Disk nr_requests\n ###############################################################################\n \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 177.00 requests vda1\n Disk request time/sector\n ###############################################################################\n \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 0.01 ms vda1\n Network recv_bytes\n ###############################################################################\n \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 739.50 KB eth0\n \u2588\u2588\u2588\u2588\u2588 80.27 KB lo\n Network sent_bytes\n ###############################################################################\n \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 9.36 MB eth0\n\n\nSystem calls\n--------\n\nPer-TID and global system call statistics\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n\n.. code-block:: bash\n\n lttng-syscallstats /path/to/trace\n\n::\n\n Timerange: [2015-01-15 12:18:37.216484041, 2015-01-15 12:18:53.821580313]\n Per-TID syscalls statistics (usec)\n find (22785) Count Min Average Max Stdev Return values\n - getdents 14240 0.380 364.301 43372.450 1629.390 {'success': 14240}\n - close 14236 0.233 0.506 4.932 0.217 {'success': 14236}\n - fchdir 14231 0.252 0.407 5.769 0.117 {'success': 14231}\n - open 7123 0.779 2.321 12.697 0.936 {'success': 7119, 'ENOENT': 4}\n - newfstatat 7118 1.457 143.562 28103.532 1410.281 {'success': 7118}\n - openat 7118 1.525 2.411 9.107 0.771 {'success': 7118}\n - newfstat 7117 0.272 0.654 8.707 0.248 {'success': 7117}\n - write 573 0.298 0.715 8.584 0.391 {'success': 573}\n - brk 27 0.615 5.768 30.792 7.830 {'success': 27}\n - rt_sigaction 22 0.227 0.283 0.589 0.098 {'success': 22}\n - mmap 12 1.116 2.116 3.597 0.762 {'success': 12}\n - mprotect 6 1.185 2.235 3.923 1.148 {'success': 6}\n - read 5 0.925 2.101 6.300 2.351 {'success': 5}\n - ioctl 4 0.342 1.151 2.280 0.873 {'success': 2, 'ENOTTY': 2}\n - access 4 1.166 2.530 4.202 1.527 {'ENOENT': 4}\n - rt_sigprocmask 3 0.325 0.570 0.979 0.357 {'success': 3}\n - dup2 2 0.250 0.562 0.874 ? {'success': 2}\n - munmap 2 3.006 5.399 7.792 ? {'success': 2}\n - execve 1 7277.974 7277.974 7277.974 ? {'success': 1}\n - setpgid 1 0.945 0.945 0.945 ? {'success': 1}\n - fcntl 1 ? 0.000 0.000 ? {}\n - newuname 1 1.240 1.240 1.240 ? {'success': 1}\n Total: 71847\n -----------------------------------------------------------------------------------------------------------------\n apache2 (31517) Count Min Average Max Stdev Return values\n - fcntl 192 ? 0.000 0.000 ? {}\n - newfstat 156 0.237 0.484 1.102 0.222 {'success': 156}\n - read 144 0.307 1.602 16.307 1.698 {'success': 117, 'EAGAIN': 27}\n - access 96 0.705 1.580 3.364 0.670 {'success': 12, 'ENOENT': 84}\n - newlstat 84 0.459 0.738 1.456 0.186 {'success': 63, 'ENOENT': 21}\n - newstat 74 0.735 2.266 11.212 1.772 {'success': 50, 'ENOENT': 24}\n - lseek 72 0.317 0.522 0.915 0.112 {'success': 72}\n - close 39 0.471 0.615 0.867 0.069 {'success': 39}\n - open 36 2.219 12162.689 437697.753 72948.868 {'success': 36}\n - getcwd 28 0.287 0.701 1.331 0.277 {'success': 28}\n - poll 27 1.080 1139.669 2851.163 856.723 {'success': 27}\n - times 24 0.765 0.956 1.327 0.107 {'success': 24}\n - setitimer 24 0.499 5.848 16.668 4.041 {'success': 24}\n - write 24 5.467 6.784 16.827 2.459 {'success': 24}\n - writev 24 10.241 17.645 29.817 5.116 {'success': 24}\n - mmap 15 3.060 3.482 4.406 0.317 {'success': 15}\n - munmap 15 2.944 3.502 4.154 0.427 {'success': 15}\n - brk 12 0.738 4.579 13.795 4.437 {'success': 12}\n - chdir 12 0.989 1.600 2.353 0.385 {'success': 12}\n - flock 6 0.906 1.282 2.043 0.423 {'success': 6}\n - rt_sigaction 6 0.530 0.725 1.123 0.217 {'success': 6}\n - pwrite64 6 1.262 1.430 1.692 0.143 {'success': 6}\n - rt_sigprocmask 6 0.539 0.650 0.976 0.162 {'success': 6}\n - shutdown 3 7.323 8.487 10.281 1.576 {'success': 3}\n - getsockname 3 1.015 1.228 1.585 0.311 {'success': 3}\n - accept4 3 5174453.611 3450157.282 5176018.235 ? {'success': 2}\n Total: 1131\n\n\nInterrupts\n----------\n\nHardware and software interrupt statistics\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n\n.. code-block:: bash\n\n lttng-irqstats /path/to/trace\n\n::\n\n Timerange: [2014-03-11 16:05:41.314824752, 2014-03-11 16:05:45.041994298]\n Hard IRQ Duration (us)\n count min avg max stdev\n ----------------------------------------------------------------------------------|\n 1: 30 10.901 45.500 64.510 18.447 |\n 42: 259 3.203 7.863 21.426 3.183 |\n 43: 2 3.859 3.976 4.093 0.165 |\n 44: 92 0.300 3.995 6.542 2.181 |\n\n Soft IRQ Duration (us) Raise latency (us)\n count min avg max stdev | count min avg max stdev\n ----------------------------------------------------------------------------------|------------------------------------------------------------\n 1: 495 0.202 21.058 51.060 11.047 | 53 2.141 11.217 20.005 7.233\n 3: 14 0.133 9.177 32.774 10.483 | 14 0.763 3.703 10.902 3.448\n 4: 257 5.981 29.064 125.862 15.891 | 257 0.891 3.104 15.054 2.046\n 6: 26 0.309 1.198 1.748 0.329 | 26 9.636 39.222 51.430 11.246\n 7: 299 1.185 14.768 90.465 15.992 | 298 1.286 31.387 61.700 11.866\n 9: 338 0.592 3.387 13.745 1.356 | 147 2.480 29.299 64.453 14.286\n\n\nInterrupt handler duration frequency distribution\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n\n.. code-block:: bash\n\n lttng-irqfreq --timerange=[16:05:42,16:05:45] --irq=44 --stats /path/to/trace\n\n::\n\n Timerange: [2014-03-11 16:05:42.042034570, 2014-03-11 16:05:44.998914297]\n Hard IRQ Duration (us)\n count min avg max stdev\n ----------------------------------------------------------------------------------|\n 44: 72 0.300 4.018 6.542 2.164 |\n Frequency distribution iwlwifi (44)\n ###############################################################################\n 0.300 \u2588\u2588\u2588\u2588\u2588 1.00\n 0.612 \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 12.00\n 0.924 \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 4.00\n 1.236 \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 2.00\n 1.548 0.00\n 1.861 \u2588\u2588\u2588\u2588\u2588 1.00\n 2.173 0.00\n 2.485 \u2588\u2588\u2588\u2588\u2588 1.00\n 2.797 \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 5.00\n 3.109 \u2588\u2588\u2588\u2588\u2588 1.00\n 3.421 \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 3.00\n 3.733 0.00\n 4.045 \u2588\u2588\u2588\u2588\u2588 1.00\n 4.357 \u2588\u2588\u2588\u2588\u2588 1.00\n 4.669 \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 2.00\n 4.981 \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 2.00\n 5.294 \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 8.00\n 5.606 \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 13.00\n 5.918 \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 12.00\n 6.230 \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 3.00\n\n\nCommunity\n=========\n\nLTTng analyses is part of the `LTTng `_ project\nand shares its community.\n\nWe hope you have fun trying this project and please remember it is a\nwork in progress; feedback, bug reports and improvement ideas are always\nwelcome!\n\n.. list-table:: LTTng analyses project's communication channels\n :header-rows: 1\n\n * - Item\n - Location\n - Notes\n * - Mailing list\n - `lttng-dev `_\n (``lttng-dev@lists.lttng.org``)\n - Preferably, use the ``[lttng-analyses]`` subject prefix\n * - IRC\n - ``#lttng`` on the OFTC network\n -\n * - Code contribution\n - Create a new GitHub\n `pull request `_\n -\n * - Bug reporting\n - Create a new GitHub\n `issue `_\n -\n * - Continuous integration\n - `lttng-analyses_master_build item\n `_ on\n LTTng's CI and `lttng/lttng-analyses project\n `_\n on Travis CI\n -\n * - Blog\n - The `LTTng blog `_ contains some posts\n about LTTng analyses\n -",
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