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author | Namhyung Kim <namhyung@kernel.org> | 2014-10-06 00:46:00 (GMT) |
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committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2014-10-15 20:38:23 (GMT) |
commit | 66f066d8994bd146304bab72fa09c1e644c4b3ff (patch) | |
tree | 9e958638fe69c2df70107aab7015be8bc36da4f3 /tools/perf/builtin-kvm.c | |
parent | 0cdccac6fe4b1316f04f0dbfcc4efab51932014a (diff) | |
download | linux-66f066d8994bd146304bab72fa09c1e644c4b3ff.tar.xz |
perf callchain: Create an address space per thread
The unw_addr_space_t in libunwind represents an address space to be used
for stack unwinding. It doesn't need to be create/destory everytime to
unwind callchain (as in get_entries) and can have a same lifetime as
thread (unless exec called).
So move the address space construction/destruction logic to the thread
lifetime handling functions. This is a preparation to enable caching in
the unwind library.
Note that it saves unw_addr_space_t object using thread__set_priv(). It
seems currently only used by perf trace and perf kvm stat commands which
don't use callchain.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jean Pihet <jean.pihet@linaro.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Arun Sharma <asharma@fb.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1412556363-26229-3-git-send-email-namhyung@kernel.org
[ Fixup unwind-libunwind.c missing CALLCHAIN_DWARF definition, added
missing __maybe_unused on unused parameters in stubs at util/unwind.h ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-kvm.c')
0 files changed, 0 insertions, 0 deletions