lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

perf top: Fall back to cpu-clock-tick hrtimer sampling if no cycle counter available

Browse Source 
On architectures/CPUs without PMU support but with perfcounters
enabled 'perf top' currently fails because it cannot create a
cycle based hw-perfcounter.

Fall back to the cpu-clock-tick sw-perfcounter in this case, which
is hrtimer based and will always work (as long as perfcounters
is enabled).

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar
2009-06-07 17:31:52 +02:00
parent 743ee1f804
commit 716c69feca
2 changed files with 73 additions and 50 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
tools/perf/util/usage.c
View File

@ -9,29 +9,29 @@ static void report(const char *prefix, const char *err, va_list params)
{
char msg[1024];
vsnprintf(msg, sizeof(msg), err, params);
fprintf(stderr, "%s%s\n", prefix, msg);
fprintf(stderr, " %s%s\n", prefix, msg);
}
static NORETURN void usage_builtin(const char *err)
{
fprintf(stderr, "\n usage: %s\n", err);
fprintf(stderr, "\n Usage: %s\n", err);
exit(129);
}
static NORETURN void die_builtin(const char *err, va_list params)
{
report("fatal: ", err, params);
report(" Fatal: ", err, params);
exit(128);
}
static void error_builtin(const char *err, va_list params)
{
report("error: ", err, params);
report(" Error: ", err, params);
}
static void warn_builtin(const char *warn, va_list params)
{
report("warning: ", warn, params);
report(" Warning: ", warn, params);
}
/* If we are in a dlopen()ed .so write to a global variable would segfault