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| author | Simon Kaempflein <s.kaempflein@gmx.de> | 2009-11-16 15:25:53 +1000 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-11-23 09:40:13 +0100 |
| commit | bfd451184d80301d1ae970b1ebffde1e9c6240f9 (patch) | |
| tree | 2080c2595b0efa4b771dc2a649ef0a1ac141f921 /tools/perf | |
| parent | 81516c5fc83a13a1d12f466aa7e14f5fd62a63ce (diff) | |
perf record, x86: Print more intelligent error message when sampling fails
Print more accurate error message when "perf record" fails because
there is no APIC support, on x86.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/builtin-record.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 87f98fdb051..0e519c667e3 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -307,6 +307,12 @@ try_again: printf("\n"); error("perfcounter syscall returned with %d (%s)\n", fd[nr_cpu][counter], strerror(err)); + +#if defined(__i386__) || defined(__x86_64__) + if (attr->type == PERF_TYPE_HARDWARE && err == EOPNOTSUPP) + die("No hardware sampling interrupt available. No APIC? If so then you can boot the kernel with the \"lapic\" boot parameter to force-enable it.\n"); +#endif + die("No CONFIG_PERF_EVENTS=y kernel support configured?\n"); exit(-1); } |