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Groups > linux.kernel > #1475175 > unrolled thread
| Started by | Wang Nan <wangnan0@huawei.com> |
|---|---|
| First post | 2016-09-02 16:10 +0200 |
| Last post | 2016-09-03 18:10 +0200 |
| Articles | 2 — 2 participants |
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[PATCH 0/3] perf report: Recognize hugetlb mapping as anon mapping Wang Nan <wangnan0@huawei.com> - 2016-09-02 16:10 +0200
Re: [PATCH 0/3] perf report: Recognize hugetlb mapping as anon mapping Nilay Vaish <nilayvaish@gmail.com> - 2016-09-03 18:10 +0200
| From | Wang Nan <wangnan0@huawei.com> |
|---|---|
| Date | 2016-09-02 16:10 +0200 |
| Subject | [PATCH 0/3] perf report: Recognize hugetlb mapping as anon mapping |
| Message-ID | <scXkl-s8-3@gated-at.bofh.it> |
The requirement of this function is first proposed at 2015. Please refer to http://lkml.iu.edu/hypermail/linux/kernel/1506.2/02372.html http://lkml.iu.edu/hypermail/linux/kernel/1506.3/02290.html http://lkml.iu.edu/hypermail/linux/kernel/1506.3/03512.html For systems which use hugetlbfs, if a sample is captured inside hugetlbfs, perf should not resolve symbols from the file shown in /prof/<pid>/mmap, because 'files' in hugetlbfs are constructed during execution and not ELF files. If user knows positions of symbols, he/she should provide /tmp/perf-<pid>.map file. This 3 patches makes perf recognize hugetlbfs mapping as anon mapping. Before this 3 patches user has no chance to use his/her own .map file to resolve symbols because perf tries to use hugetlbfs file. Wang Nan (3): perf tools: Recognize hugetlb mapping as anon mapping tools lib api fs: Add hugetlbfs filesystem detector perf record: Mark MAP_HUGETLB during synthesizing mmap events tools/lib/api/fs/fs.c | 15 +++++++++++++++ tools/lib/api/fs/fs.h | 1 + tools/perf/util/event.c | 7 +++++++ tools/perf/util/map.c | 8 +++++--- 4 files changed, 28 insertions(+), 3 deletions(-) Signed-off-by: Wang Nan <wangnan0@huawei.com> Cc: Hou Pengyang <houpengyang@huawei.com> Cc: He Kuang <hekuang@huawei.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> -- 1.8.3.4
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| From | Nilay Vaish <nilayvaish@gmail.com> |
|---|---|
| Date | 2016-09-03 18:10 +0200 |
| Message-ID | <sdlG2-7ta-9@gated-at.bofh.it> |
| In reply to | #1475175 |
On 2 September 2016 at 08:59, Wang Nan <wangnan0@huawei.com> wrote: > The requirement of this function is first proposed at 2015. > Please refer to > > http://lkml.iu.edu/hypermail/linux/kernel/1506.2/02372.html > http://lkml.iu.edu/hypermail/linux/kernel/1506.3/02290.html > http://lkml.iu.edu/hypermail/linux/kernel/1506.3/03512.html > > For systems which use hugetlbfs, if a sample is captured inside > hugetlbfs, perf should not resolve symbols from the file shown in > /prof/<pid>/mmap, because 'files' in hugetlbfs are constructed > during execution and not ELF files. If user knows positions of > symbols, he/she should provide /tmp/perf-<pid>.map file. > > This 3 patches makes perf recognize hugetlbfs mapping as anon mapping. > Before this 3 patches user has no chance to use his/her own .map file > to resolve symbols because perf tries to use hugetlbfs file. > > Wang Nan (3): > perf tools: Recognize hugetlb mapping as anon mapping > tools lib api fs: Add hugetlbfs filesystem detector > perf record: Mark MAP_HUGETLB during synthesizing mmap events > > tools/lib/api/fs/fs.c | 15 +++++++++++++++ > tools/lib/api/fs/fs.h | 1 + > tools/perf/util/event.c | 7 +++++++ > tools/perf/util/map.c | 8 +++++--- > 4 files changed, 28 insertions(+), 3 deletions(-) > > Signed-off-by: Wang Nan <wangnan0@huawei.com> > Cc: Hou Pengyang <houpengyang@huawei.com> > Cc: He Kuang <hekuang@huawei.com> > Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Reviewed-by: Nilay Vaish <nilayvaish@gmail.com>
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