Messages in this thread Patch in this message | | | Date | Fri, 9 Mar 2018 00:57:13 -0800 | From | tip-bot for Wang YanQing <> | Subject | [tip:perf/core] perf report: Provide libtraceevent with a kernel symbol resolver |
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Commit-ID: ea85ab24c502720d2eb3dec30bedb6df06d4900b Gitweb: https://git.kernel.org/tip/ea85ab24c502720d2eb3dec30bedb6df06d4900b Author: Wang YanQing <udknight@gmail.com> AuthorDate: Thu, 8 Mar 2018 11:28:50 +0800 Committer: Arnaldo Carvalho de Melo <acme@redhat.com> CommitDate: Thu, 8 Mar 2018 11:30:51 -0300
perf report: Provide libtraceevent with a kernel symbol resolver
So that beautifiers wanting to resolve kernel function addresses to names can do its work, and when we use "perf report" for output of "perf kmem record", we will get kernel symbol output.
This patch affect the output of "perf report" for the record data generated by "perf kmem record" looks like below:
Before patch: 0.01% call_site=ffffffff814e5828 ptr=0x99bb000 bytes_req=3616 bytes_alloc=4096 gfp_flags=GFP_ATOMIC 0.01% call_site=ffffffff81370b87 ptr=0x428a3060 bytes_req=32 bytes_alloc=32 gfp_flags=GFP_KERNEL|GFP_ZERO
After patch: 0.01% (aa_alloc_task_context+0x27) call_site=ffffffff81370b87 ptr=0x428a3060 bytes_req=32 bytes_alloc=32 gfp_flags=GFP_KERNEL|GFP_ZERO 0.01% (__tty_buffer_request_room+0x88) call_site=ffffffff814e5828 ptr=0x99bb000 bytes_req=3616 bytes_alloc=4096 gfp_flags=GFP_ATOMIC
Signed-off-by: Wang YanQing <udknight@gmail.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180308032850.GA12383@udknight-ThinkPad-E550 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/perf/builtin-report.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c index c3603d4c0c57..971ccba85464 100644 --- a/tools/perf/builtin-report.c +++ b/tools/perf/builtin-report.c @@ -1348,6 +1348,15 @@ repeat: report.range_num = 1; } + if (session->tevent.pevent && + pevent_set_function_resolver(session->tevent.pevent, + machine__resolve_kernel_addr, + &session->machines.host) < 0) { + pr_err("%s: failed to set libtraceevent function resolver\n", + __func__); + return -1; + } + sort__setup_elide(stdout); ret = __cmd_report(&report);
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