On Thu, 13 Jun 2013, Tommi Rantala wrote:
> Unable to opendir /sys/bus/event_source/devices : Resource temporarily
> unavailable
> [221186.493638] traps: trinity-child30[375] trap divide error
> ip:40dbae sp:7fff3c1d7ae0 error:0 in trinity[400000+28000]
The below patch should fix this problem.
Though in the case where /sys/bus/event_source/devices isn't available
trinity will try opening it again each time it tries to do a
PERF_TYPE_READ_FROM_SYSFS type (1 time in 7). Not sure if it's
worth rate-limiting that.
Signed-off-by: Vince Weaver <vincent.weaver@xxxxxxxxx>
diff --git a/syscalls/perf_event_open.c b/syscalls/perf_event_open.c
index 32c11cf..11f49e8 100644
--- a/syscalls/perf_event_open.c
+++ b/syscalls/perf_event_open.c
@@ -406,6 +406,14 @@ static long long random_sysfs_config(__u32 *type, __u64 *config1) {
int i,j;
long long c=0,c1=0;
+ if (num_pmus==0) {
+ /* For some reason we didn't get initialized */
+ /* Fake it so we don't divide by zero */
+ *type=rand32();
+ *config1=rand64();
+ return rand64();
+ }
+
i=rand()%num_pmus;
*type=pmus[i].type;
--
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