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RE: [PATCH] lock stat for -rt 2.6.20-rc2-rt2.2.lock_stat.patch

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From: Chen, Tim C <tim.c.chen@...>
To: Bill Huey (hui) <billh@...>
Cc: Ingo Molnar <mingo@...>, <linux-kernel@...>, Siddha, Suresh B <suresh.b.siddha@...>, Peter Zijlstra <a.p.zijlstra@...>, Steven Rostedt <rostedt@...>, Thomas Gleixner <tglx@...>, Daniel Walker <dwalker@...>
Subject: RE: [PATCH] lock stat for -rt 2.6.20-rc2-rt2.2.lock_stat.patch
Date: Wednesday, January 3, 2007 - 8:25 pm

Bill Huey (hui) wrote:

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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Messages in current thread:
[PATCH] lock stat for -rt 2.6.20-rc2-rt2.2.lock_stat.patch, Bill Huey, (Wed Jan 3, 3:41 am)
Re: [PATCH] lock stat for -rt 2.6.20-rc2-rt2.2.lock_stat.patch, Ingo Molnar, (Wed Jan 24, 7:31 am)
Re: [PATCH] lock stat for -rt 2.6.20-rc2-rt2.2.lock_stat.patch, Bill Huey, (Wed Jan 24, 6:52 pm)
Re: [PATCH] lock stat for -rt 2.6.20-rc2-rt2.2.lock_stat.patch, Ingo Molnar, (Thu Jan 4, 12:46 am)
Re: [PATCH] lock stat for -rt 2.6.20-rc2-rt2.2.lock_stat.patch, Bill Huey, (Wed Jan 24, 7:06 pm)
Re: [PATCH] lock stat for -rt 2.6.20-rc2-rt2.2.lock_stat.patch, Ingo Molnar, (Thu Jan 25, 4:39 am)
RE: [PATCH] lock stat for -rt 2.6.20-rc2-rt2.2.lock_stat.patch, Chen, Tim C, (Wed Jan 3, 7:59 pm)
Re: [PATCH] lock stat for -rt 2.6.20-rc2-rt2.2.lock_stat.patch, Bill Huey, (Wed Jan 3, 8:12 pm)
RE: [PATCH] lock stat for -rt 2.6.20-rc2-rt2.2.lock_stat.patch, Chen, Tim C, (Wed Jan 3, 8:25 pm)
Re: [PATCH] lock stat for -rt 2.6.20-rc2-rt2.2.lock_stat.patch, Bill Huey, (Wed Jan 3, 8:29 pm)
RE: [PATCH] lock stat for -rt 2.6.20-rc2-rt2.2.lock_stat.patch, Chen, Tim C, (Wed Jan 3, 8:46 pm)
Re: [PATCH] lock stat for -rt 2.6.20-rc2-rt2.2.lock_stat.patch, Bill Huey, (Wed Jan 3, 9:00 pm)
RE: [PATCH] lock stat for -rt 2.6.20-rc2-rt2.2.lock_stat.patch, Chen, Tim C, (Wed Jan 3, 9:11 pm)
Re: [PATCH] lock stat for -rt 2.6.20-rc2-rt2.2.lock_stat.patch, Bill Huey, (Wed Jan 3, 9:27 pm)
RE: [PATCH] lock stat for -rt 2.6.20-rc2-rt2.2.lock_stat.patch, Chen, Tim C, (Wed Jan 3, 10:14 pm)
Re: [PATCH] lock stat for -rt 2.6.20-rc2-rt2.2.lock_stat.patch, Bill Huey, (Thu Jan 4, 4:12 am)
Re: [PATCH] lock stat for -rt 2.6.20-rc2-rt2.2.lock_stat.patch, Bill Huey, (Wed Jan 3, 9:07 pm)