* [RFC] [PATCH] XCHGADD ARM implementation
@ 2010-10-05 21:05 Ashwin Chaugule
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From: Ashwin Chaugule @ 2010-10-05 21:05 UTC (permalink / raw)
To: linux-arm-kernel
The following patch is the ARM implementation for RWSEM_XCHGADD_ALGORITHM.
Based on David's rwsem benchmark from http://lwn.net/Articles/89191/ ,
I see a consistent 5-6% increase in the number of reads and writes taken as
compared to RWSEM_GENERIC_SPINLOCK on a dual core ARMv7. So far I have tested
numrd=1 numwr=1 numdg=1 do_sched=1
numrd=10 numwr=10 numdg=1 do_sched=1
numrd=20 numwr=20 numdg=1 do_sched=1
Can anyone else help to test this patch on other ARM systems ?
Cheers,
Ashwin
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2010-10-05 21:05 [RFC] [PATCH] XCHGADD ARM implementation Ashwin Chaugule
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