Bill Huey (hui) wrote:
>
> Good to know that. What did the output reveal ?
>
> What's your intended use again summarized ? futex contention ? I'll
> read the first posting again.
>
Earlier I used latency_trace and figured that there was read contention
on mm->mmap_sem during call to _rt_down_read by java threads
when I was running volanomark. That caused the slowdown of the rt
kernel
compared to non-rt kernel. The output from lock_stat confirm
that mm->map_sem was indeed the most heavily contended lock.
Tim
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