Box: Q6600
Reproducer:
perf sched record -- sleep 1
perf sched lat (boom)
The bisect winner:
marge:/usr/local/src/kernel/linux-3.x.git # git bisect good
5c5e854bc760a2e2c878df3cfcf2afa4febcd511 is the first bad commit
commit 5c5e854bc760a2e2c878df3cfcf2afa4febcd511
Author: Stephane Eranian <eran...@google.com>
Date: Wed Aug 21 12:10:25 2013 +0200
perf tools: Add attr->mmap2 support
This patch adds support for the new PERF_RECORD_MMAP2 record type
exposed by the kernel. This is an extended PERF_RECORD_MMAP record.
It adds for each file-backed mapping the device major, minor number and
the inode number and generation.
This triplet uniquely identifies the source of a file-backed mapping. It
can be used to detect identical virtual mappings between processes, for
instance.
The patch will prefer MMAP2 over MMAP.
Signed-off-by: Stephane Eranian <eran...@google.com>
Cc: Andi Kleen <a...@linux.intel.com>
Cc: David Ahern <dsah...@gmail.com>
Cc: Ingo Molnar <mi...@elte.hu>
Cc: Jiri Olsa <jo...@redhat.com>
Cc: Namhyung Kim <namhyung....@lge.com>
Cc: Peter Zijlstra <pet...@infradead.org>
Link:
http://lkml.kernel.org/r/1377079825-19057-3-git-send-email-eran...@google.com
[ Cope with 314add6 "Change machine__findnew_thread() to set thread pid",
fix 'perf test' regression test entry affected,
use perf_missing_features.mmap2 to fallback to not using .mmap2 in older
kernels,
so that new tools can work with kernels where this feature is not present
]
Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com>
:040000 040000 2d600afbdd11b323bbcd00a4c6b50ee82a604acc
d2a81503d08aeea994e203245358ae939eb5e787 M tools
git bisect start
# bad: [8b5ede69d24db939f52b47effff2f6fe1e83e08b] powerpc/irq: Don't switch to
irq stack from softirq stack
git bisect bad 8b5ede69d24db939f52b47effff2f6fe1e83e08b
# good: [6e4664525b1db28f8c4e1130957f70a94c19213e] Linux 3.11
git bisect good 6e4664525b1db28f8c4e1130957f70a94c19213e
# good: [57d730924d5cc2c3e280af16a9306587c3a511db] Merge branch
'timers-urgent-for-linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 57d730924d5cc2c3e280af16a9306587c3a511db
# good: [d8cacd3a259bf522ea5e6c4c60eba67ba22f599c] Merge tag
'virtio-next-for-linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux
git bisect good d8cacd3a259bf522ea5e6c4c60eba67ba22f599c
# good: [b55ee2816ed6d8f8a00d4badab0e3642ffbac19f] Merge branch
'sched-urgent-for-linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good b55ee2816ed6d8f8a00d4badab0e3642ffbac19f
# bad: [d45004f9947e521fc9e812bc7937ed6e0328793b] Merge tag 'for_linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
git bisect bad d45004f9947e521fc9e812bc7937ed6e0328793b
# bad: [9bf12df31f282e845b3dfaac1e5d5376a041da22] Merge
git://git.kvack.org/~bcrl/aio-next
git bisect bad 9bf12df31f282e845b3dfaac1e5d5376a041da22
# bad: [26935fb06ee88f1188789807687c03041f3c70d9] Merge branch 'for-linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
git bisect bad 26935fb06ee88f1188789807687c03041f3c70d9
# bad: [5223161dc0f5e44fbf3d5e42d23697b6796cdf4e] Merge branch 'for-next' of
git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds
git bisect bad 5223161dc0f5e44fbf3d5e42d23697b6796cdf4e
# bad: [02b9735c12892e04d3e101b06e4c6d64a814f566] Merge tag
'pm+acpi-fixes-3.12-rc1' of
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
git bisect bad 02b9735c12892e04d3e101b06e4c6d64a814f566
# good: [0df03a30c333d67ee9b4c37f32d423624f48fe05] Merge branch 'pm-cpufreq'
git bisect good 0df03a30c333d67ee9b4c37f32d423624f48fe05
# bad: [5c5e854bc760a2e2c878df3cfcf2afa4febcd511] perf tools: Add attr->mmap2
support
git bisect bad 5c5e854bc760a2e2c878df3cfcf2afa4febcd511
# good: [41817815666e4a6f302dad1fea47cbe64cc45e40] perf trace: Check if
MAP_32BIT is defined
git bisect good 41817815666e4a6f302dad1fea47cbe64cc45e40
# good: [ccf53eac2097fb47bc40875ffb22c2d10fa8c46c] perf trace: Handle perf.data
files with no tracepoints
git bisect good ccf53eac2097fb47bc40875ffb22c2d10fa8c46c
# good: [e71aa28312b208a14cd87fa61e941ac8c85072f4] perf kvm: Fix sample_type
manipulation
git bisect good e71aa28312b208a14cd87fa61e941ac8c85072f4
# first bad commit: [5c5e854bc760a2e2c878df3cfcf2afa4febcd511] perf tools: Add
attr->mmap2 support
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