aboutsummaryrefslogtreecommitdiff
path: root/tools/perf/builtin-record.c
diff options
context:
space:
mode:
authorSimon Kaempflein <s.kaempflein@gmx.de>2009-11-16 15:25:53 +1000
committerIngo Molnar <mingo@elte.hu>2009-11-23 09:40:13 +0100
commitbfd451184d80301d1ae970b1ebffde1e9c6240f9 (patch)
tree2080c2595b0efa4b771dc2a649ef0a1ac141f921 /tools/perf/builtin-record.c
parent81516c5fc83a13a1d12f466aa7e14f5fd62a63ce (diff)
downloadlinux-2.6.34-ux500-bfd451184d80301d1ae970b1ebffde1e9c6240f9.tar.gz
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/builtin-record.c')
-rw-r--r--tools/perf/builtin-record.c6
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);
}