perf tools: Don't stop synthesizing threads when one vanishes
authorArnaldo Carvalho de Melo <acme@redhat.com>
Wed, 17 Oct 2012 21:50:13 +0000 (18:50 -0300)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Thu, 25 Oct 2012 12:37:15 +0000 (10:37 -0200)
commitba361c92e73c771fcbbbd24c2c03c322e2de2e31
tree77ee1c1273490cc8703fdff6e6a86771b762f903
parent6ca2a9c6543dd1a307c0250991d4de93550209ce
perf tools: Don't stop synthesizing threads when one vanishes

The perf_event__synthesize_threads routine synthesizes all the existing
threads in the system, because we don't have any kernel facilities to
ask for PERF_RECORD_{FORK,MMAP,COMM} for existing threads.

It was returning an error as soon as one thread couldn't be synthesized,
which is a bit extreme when, for instance, a forkish workload is
running, like a kernel compile.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-i7oas1eodpoer2bx38fwyasv@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/perf/util/event.c