https://bz.apache.org/bugzilla/show_bug.cgi?id=60006
Bug ID: 60006
Summary: Replacing g_mutex_skiplist_mtx mutex lock with
pthread_spin_lock provides performance benefit
Product: Apache httpd-2
Version: 2.4.20
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: mpm_event
Assignee: [email protected]
Reporter: [email protected]
While running benchmark ab with our tool we found that g_timer_skiplist_mtx is
acquired very frequently but the contention is very low. We experinted by
replacing this pthread_mutex_lock with spinlock. We achieve 7% speedup running
./ab -k -c 350 -n 20000 localhost:8080/
in our 16 core linux machine.
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