#! /usr/bin/python
# -*- python -*-
# -*- coding: utf-8 -*-
#   twatch - Experimental use of the perf python interface
#   Copyright (C) 2011 Arnaldo Carvalho de Melo <acme@redhat.com>
#
#   This application is free software; you can redistribute it and/or
#   modify it under the terms of the GNU General Public License
#   as published by the Free Software Foundation; version 2.
#
#   This application is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
#   General Public License for more details.

import perf

def main(context_switch = 0, thread = -1):
	cpus = perf.cpu_map()
	threads = perf.thread_map(thread)
	evsel = perf.evsel(type	  = perf.TYPE_SOFTWARE,
			   config = perf.COUNT_SW_DUMMY,
			   task = 1, comm = 1, mmap = 0, freq = 0,
			   wakeup_events = 1, watermark = 1,
			   sample_id_all = 1, context_switch = context_switch,
			   sample_type = perf.SAMPLE_PERIOD | perf.SAMPLE_TID | perf.SAMPLE_CPU)

	"""What we want are just the PERF_RECORD_ lifetime events for threads,
	 using the default, PERF_TYPE_HARDWARE + PERF_COUNT_HW_CYCLES & freq=1
	 (the default), makes perf reenable irq_vectors:local_timer_entry, when
	 disabling nohz, not good for some use cases where all we want is to get
	 threads comes and goes... So use (perf.TYPE_SOFTWARE, perf_COUNT_SW_DUMMY,
	 freq=0) instead."""

	evsel.open(cpus = cpus, threads = threads);
	evlist = perf.evlist(cpus, threads)
	evlist.add(evsel)
	evlist.mmap()
	while True:
		evlist.poll(timeout = -1)
		for cpu in cpus:
			event = evlist.read_on_cpu(cpu)
			if not event:
				continue
			print "cpu: %2d, pid: %4d, tid: %4d" % (event.sample_cpu,
								event.sample_pid,
								event.sample_tid),
			print event

if __name__ == '__main__':
    """
	To test the PERF_RECORD_SWITCH record, pick a pid and replace
	in the following line.

	Example output:

cpu: 3, pid: 31463, tid: 31593 { type: context_switch, next_prev_pid: 31463, next_prev_tid: 31593, switch_out: 1 }
cpu: 1, pid: 31463, tid: 31489 { type: context_switch, next_prev_pid: 31463, next_prev_tid: 31489, switch_out: 1 }
cpu: 2, pid: 31463, tid: 31496 { type: context_switch, next_prev_pid: 31463, next_prev_tid: 31496, switch_out: 1 }
cpu: 3, pid: 31463, tid: 31491 { type: context_switch, next_prev_pid: 31463, next_prev_tid: 31491, switch_out: 0 }

	It is possible as well to use event.misc & perf.PERF_RECORD_MISC_SWITCH_OUT
	to figure out if this is a context switch in or out of the monitored threads.

	If bored, please add command line option parsing support for these options :-)
    """
    # main(context_switch = 1, thread = 31463)
    main()
h: <a href='/cgit.cgi/linux/net-next.git/commit/?id=3365135d43f861003555c963b309672d053a2228'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?id=3365135d43f861003555c963b309672d053a2228'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/net?id=3365135d43f861003555c963b309672d053a2228'>net</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/net/af_ieee802154.h?id=3365135d43f861003555c963b309672d053a2228'>af_ieee802154.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='3365135d43f861003555c963b309672d053a2228'/><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'>2017-01-27 12:44:32 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-27 12:44:32 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/net/af_ieee802154.h?id=3365135d43f861003555c963b309672d053a2228'>3365135d43f861003555c963b309672d053a2228</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/net/af_ieee802154.h?id=3365135d43f861003555c963b309672d053a2228'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=3365135d43f861003555c963b309672d053a2228'>bfef4adec5da118bf1b3df7e5cff74f45af9e02d</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/net/af_ieee802154.h?id=3365135d43f861003555c963b309672d053a2228'>include/net/af_ieee802154.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/net/af_ieee802154.h?id=5906374446386fd16fe562b042429d905d231ec3'>5906374446386fd16fe562b042429d905d231ec3</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/net/af_ieee802154.h?id=3365135d43f861003555c963b309672d053a2228&amp;id2=5906374446386fd16fe562b042429d905d231ec3'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/net/af_ieee802154.h?id=e0d76fa4475ef2cf4b52d18588b8ce95153d021b'>e0d76fa4475ef2cf4b52d18588b8ce95153d021b</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/net/af_ieee802154.h?id=3365135d43f861003555c963b309672d053a2228&amp;id2=e0d76fa4475ef2cf4b52d18588b8ce95153d021b'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge tag 'xfs-for-linus-4.10-rc6-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux</div><div class='commit-msg'>Pull xfs uodates from Darrick Wong:
 "I have some more fixes this week: better input validation, corruption
  avoidance, build fixes, memory leak fixes, and a couple from Christoph
  to avoid an ENOSPC failure.

  Summary:
   - Fix race conditions in the CoW code
   - Fix some incorrect input validation checks
   - Avoid crashing fs by running out of space when freeing inodes
   - Fix toctou race wrt whether or not an inode has an attr
   - Fix build error on arm
   - Fix page refcount corruption when readahead fails
   - Don't corrupt userspace in the bmap ioctl"

* tag 'xfs-for-linus-4.10-rc6-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: prevent quotacheck from overloading inode lru
  xfs: fix bmv_count confusion w/ shared extents
  xfs: clear _XBF_PAGES from buffers when readahead page
  xfs: extsize hints are not unlikely in xfs_bmap_btalloc
  xfs: remove racy hasattr check from attr ops
  xfs: use per-AG reservations for the finobt
  xfs: only update mount/resv fields on success in __xfs_ag_resv_init
  xfs: verify dirblocklog correctly
  xfs: fix COW writeback race
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=3365135d43f861003555c963b309672d053a2228'>Diffstat</a> (limited to 'include/net/af_ieee802154.h')</div><table summary='diffstat' class='diffstat'>