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perf evsel: Introduce perf_evsel__open_strerror method

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That consolidates the error messages in 'record', 'stat' and 'top', that
now get a consistent set of messages and allow other tools to use the
new method to report problems using whatever UI toolkit.

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-1cudb7wl996kz7ilz83ctvhr@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2012-12-13 15:10:58 -03:00
parent c0a54341c0
commit 56e52e8536
7 changed files with 68 additions and 100 deletions
Download patch file Download diff file Expand all files Collapse all files

16
tools/perf/builtin-stat.c
View file

@ -247,6 +247,7 @@ static int read_counter(struct perf_evsel *counter)
static int __run_perf_stat(int argc __maybe_unused, const char **argv)
{
char msg[512];
unsigned long long t0, t1;
struct perf_evsel *counter;
int status = 0;
@ -324,20 +325,13 @@ static int __run_perf_stat(int argc __maybe_unused, const char **argv)
continue;
}
if (errno == EPERM || errno == EACCES) {
error("You may not have permission to collect %sstats.\n"
"\t Consider tweaking"
" /proc/sys/kernel/perf_event_paranoid or running as root.",
target.system_wide ? "system-wide " : "");
} else {
error("open_counter returned with %d (%s). "
"/bin/dmesg may provide additional information.\n",
errno, strerror(errno));
}
perf_evsel__open_strerror(counter, &target,
errno, msg, sizeof(msg));
ui__error("%s\n", msg);
if (child_pid != -1)
kill(child_pid, SIGTERM);
pr_err("Not all events could be opened.\n");
return -1;
}
counter->supported = true;