perf-mem(1)
===========

NAME
----
perf-mem - Profile memory accesses

SYNOPSIS
--------
[verse]
'perf mem' [<options>] (record [<command>] | report)

DESCRIPTION
-----------
"perf mem record" runs a command and gathers memory operation data
from it, into perf.data. Perf record options are accepted and are passed through.

"perf mem report" displays the result. It invokes perf report with the
right set of options to display a memory access profile. By default, loads
and stores are sampled. Use the -t option to limit to loads or stores.

Note that on Intel systems the memory latency reported is the use-latency,
not the pure load (or store latency). Use latency includes any pipeline
queueing delays in addition to the memory subsystem latency.

OPTIONS
-------
<command>...::
	Any command you can specify in a shell.

-t::
--type=::
	Select the memory operation type: load or store (default: load,store)

-D::
--dump-raw-samples=::
	Dump the raw decoded samples on the screen in a format that is easy to parse with
	one sample per line.

-x::
--field-separator::
	Specify the field separator used when dump raw samples (-D option). By default,
	The separator is the space character.

-C::
--cpu-list::
	Restrict dump of raw samples to those provided via this option. Note that the same
	option can be passed in record mode. It will be interpreted the same way as perf
	record.

-K::
--all-kernel::
	Configure all used events to run in kernel space.

-U::
--all-user::
	Configure all used events to run in user space.

--ldload::
	Specify desired latency for loads event.

SEE ALSO
--------
linkperf:perf-record[1], linkperf:perf-report[1]
?h=nds-private-remove'>summary</a><a href='/cgit.cgi/linux/net-next.git/refs/?h=nds-private-remove&amp;id=4759d386d55fef452d692bf101167914437e848e'>refs</a><a href='/cgit.cgi/linux/net-next.git/log/include/net/phonet/pep.h?h=nds-private-remove'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/include/net/phonet/pep.h?h=nds-private-remove&amp;id=4759d386d55fef452d692bf101167914437e848e'>tree</a><a class='active' href='/cgit.cgi/linux/net-next.git/commit/include/net/phonet/pep.h?h=nds-private-remove&amp;id=4759d386d55fef452d692bf101167914437e848e'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/include/net/phonet/pep.h?h=nds-private-remove&amp;id=4759d386d55fef452d692bf101167914437e848e'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/include/net/phonet/pep.h'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=4759d386d55fef452d692bf101167914437e848e'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?h=nds-private-remove&amp;id=4759d386d55fef452d692bf101167914437e848e'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/net?h=nds-private-remove&amp;id=4759d386d55fef452d692bf101167914437e848e'>net</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/net/phonet?h=nds-private-remove&amp;id=4759d386d55fef452d692bf101167914437e848e'>phonet</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/net/phonet/pep.h?h=nds-private-remove&amp;id=4759d386d55fef452d692bf101167914437e848e'>pep.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='4759d386d55fef452d692bf101167914437e848e'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-01 12:27:05 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-01 12:27:05 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/net/phonet/pep.h?h=nds-private-remove&amp;id=4759d386d55fef452d692bf101167914437e848e'>4759d386d55fef452d692bf101167914437e848e</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/net/phonet/pep.h?id=4759d386d55fef452d692bf101167914437e848e'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=4759d386d55fef452d692bf101167914437e848e'>e7109c192ec589fcea2a98f9702aa3c0e4009581</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/net/phonet/pep.h?h=nds-private-remove&amp;id=4759d386d55fef452d692bf101167914437e848e'>include/net/phonet/pep.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/net/phonet/pep.h?h=nds-private-remove&amp;id=238d1d0f79f619d75c2cc741d6770fb0986aef24'>238d1d0f79f619d75c2cc741d6770fb0986aef24</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/net/phonet/pep.h?h=nds-private-remove&amp;id=4759d386d55fef452d692bf101167914437e848e&amp;id2=238d1d0f79f619d75c2cc741d6770fb0986aef24'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/net/phonet/pep.h?h=nds-private-remove&amp;id=1db175428ee374489448361213e9c3b749d14900'>1db175428ee374489448361213e9c3b749d14900</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/net/phonet/pep.h?h=nds-private-remove&amp;id=4759d386d55fef452d692bf101167914437e848e&amp;id2=1db175428ee374489448361213e9c3b749d14900'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm</div><div class='commit-msg'>Pull DAX updates from Dan Williams:
 "The completion of Jan's DAX work for 4.10.

  As I mentioned in the libnvdimm-for-4.10 pull request, these are some
  final fixes for the DAX dirty-cacheline-tracking invalidation work
  that was merged through the -mm, ext4, and xfs trees in -rc1. These
  patches were prepared prior to the merge window, but we waited for
  4.10-rc1 to have a stable merge base after all the prerequisites were
  merged.

  Quoting Jan on the overall changes in these patches:

     "So I'd like all these 6 patches to go for rc2. The first three
      patches fix invalidation of exceptional DAX entries (a bug which
      is there for a long time) - without these patches data loss can
      occur on power failure even though user called fsync(2). The other
      three patches change locking of DAX faults so that -&gt;iomap_begin()
      is called in a more relaxed locking context and we are safe to
      start a transaction there for ext4"

  These have received a build success notification from the kbuild
  robot, and pass the latest libnvdimm unit tests. There have not been
  any -next releases since -rc1, so they have not appeared there"

* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  ext4: Simplify DAX fault path
  dax: Call -&gt;iomap_begin without entry lock during dax fault
  dax: Finish fault completely when loading holes
  dax: Avoid page invalidation races and unnecessary radix tree traversals
  mm: Invalidate DAX radix tree entries only if appropriate
  ext2: Return BH_New buffers for zeroed blocks
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=4759d386d55fef452d692bf101167914437e848e'>Diffstat</a> (limited to 'include/net/phonet/pep.h')</div><table summary='diffstat' class='diffstat'>