From ea85ab24c502720d2eb3dec30bedb6df06d4900b Mon Sep 17 00:00:00 2001 From: Wang YanQing Date: Thu, 8 Mar 2018 11:28:50 +0800 Subject: [PATCH] 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 Acked-by: Jiri Olsa Tested-by: Arnaldo Carvalho de Melo Cc: Alexander Shishkin Cc: Jiri Olsa Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20180308032850.GA12383@udknight-ThinkPad-E550 Signed-off-by: Arnaldo Carvalho de Melo --- 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 c3603d4..971ccba 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); -- 2.7.4