evie/android_kernel_oneplus_msm8998
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staging: android: sync: Limit sync log dumping

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Dump sync logs only when a fence is not signalled
for SYNC_DUMP_TIME_LIMIT or more. This is necessary
to reduce CPU hogging because of excessive sync logs
dumped due to fence timeouts which are less than
SYNC_DUMP_TIME_LIMIT and are harmless.

Change-Id: Id21a02925dd45a01361d096048a25d1879ebde9e
Signed-off-by: Deepak Kumar <dkumar@codeaurora.org>
This commit is contained in:
Deepak Kumar 2017-04-20 18:30:19 +05:30
parent 6ee87610ac
commit 5ef49cfc5b
1 changed files with 4 additions and 1 deletions
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5
drivers/staging/android/sync.c
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@ -29,6 +29,7 @@
#include "sync.h"
#define CREATE_TRACE_POINTS
#define SYNC_DUMP_TIME_LIMIT 7000
#include "trace/sync.h"
static const struct fence_ops android_fence_ops;
@ -392,7 +393,9 @@ int sync_fence_wait(struct sync_fence *fence, long timeout)
if (timeout) {
pr_info("fence timeout on [%pK] after %dms\n", fence,
jiffies_to_msecs(timeout));
sync_dump();
if (jiffies_to_msecs(timeout) >=
SYNC_DUMP_TIME_LIMIT)
sync_dump();
}
return -ETIME;
}