From f60f359383edf2a0ec3aa32cf8be98ad815bdf65 Mon Sep 17 00:00:00 2001 From: Arun Sharma Date: Fri, 4 Jun 2010 11:27:10 -0300 Subject: perf report: Implement --sort cpu In a shared multi-core environment, users want to analyze why their program was slow. In particular, if the code ran slower only on certain CPUs due to interference from other programs or kernel threads, the user should be able to notice that. Sample usage: perf record -f -a -- sleep 3 perf report --sort cpu,comm Workload: program is running on 16 CPUs Experiencing interference from an antagonist only on 4 CPUs. Samples: 106218177676 cycles Overhead CPU Command ........ ... ............... 6.25% 2 program 6.24% 6 program 6.24% 11 program 6.24% 5 program 6.24% 9 program 6.24% 10 program 6.23% 15 program 6.23% 7 program 6.23% 3 program 6.23% 14 program 6.22% 1 program 6.20% 13 program 3.17% 12 program 3.15% 8 program 3.14% 0 program 3.13% 4 program 3.11% 4 antagonist 3.11% 0 antagonist 3.10% 8 antagonist 3.07% 12 antagonist Cc: David S. Miller Cc: Frédéric Weisbecker Cc: Ingo Molnar Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Tom Zanussi LKML-Reference: <20100505181612.GA5091@sharma-home.net> Signed-off-by: Arun Sharma Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/event.c | 1 + 1 file changed, 1 insertion(+) (limited to 'tools/perf/util/event.c') diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c index ed3e14ff6df0..a7460868124b 100644 --- a/tools/perf/util/event.c +++ b/tools/perf/util/event.c @@ -710,6 +710,7 @@ int event__preprocess_sample(const event_t *self, struct perf_session *session, al->map ? al->map->dso->long_name : al->level == 'H' ? "[hypervisor]" : ""); al->sym = NULL; + al->cpu = data->cpu; if (al->map) { if (symbol_conf.dso_list && -- cgit v1.2.3-55-g7522