Bill Huey (hui) wrote:
> Can you sort the output ("sort -n" what ever..) and post it without
> the zeroed entries ?
>
> I'm curious about how that statistical spike compares to the rest of
> the system activity. I'm sure that'll get the attention of Peter as
> well and maybe he'll do something about it ? :)
>
Here's the lockstat trace. You can cross reference it with my
earlier post.
http://marc.theaimsgroup.com/?l=linux-kernel&m=116743637422465&w=2
The contention happened on mm->mmap_sem shared
by the java threads during futex_wake's invocation of _rt_down_read.
Tim
@contention events = 247149
@failure_events = 146
@lookup_failed_scope = 175
@lookup_failed_static = 43
@static_found = 16
[1, 113, 77 -- 32768, 0] {tcp_init, net/ipv4/tcp.c, 2426}
[2, 759, 182 -- 1, 0] {lock_kernel, -, 0}
[13, 0, 7 -- 4, 0] {kmem_cache_free, -, 0}
[25, 3564, 9278 -- 1, 0] {lock_timer_base, -, 0}
[56, 9528, 24552 -- 3, 0] {init_timers_cpu, kernel/timer.c,
1842}
[471, 52845, 17682 -- 10448, 0] {sock_lock_init, net/core/sock.c,
817}
[32251, 9024, 242 -- 256, 0] {init, kernel/futex.c, 2781}
[173724, 11899638, 9886960 -- 11194, 0] {mm_init, kernel/fork.c,
369}
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