Re: [rfc][patch] store-free path walking
From: Jens Axboe
Date: Mon Oct 12 2009 - 07:02:13 EST
On Mon, Oct 12 2009, Jens Axboe wrote:
> > Anyway, if you do get a chance to run dbench with this
> > modification, I would appreciate seeing a profile with clal
> > traces (my bigger system is ia64 which doesn't do perf yet).
>
> For what number of clients?
Attached are call graphs for 8 and 32 clients, with your latest patch
applied. At 8 clients, we're already at 80% spinlock time. While running
the 32 client record, I wanted to open a file in the tmpfs mount where
dbench was running. bash was spinning until dbench completed.
At 32 clients, throughput is 75% of the 8 client case. And spinlock time
there is at 90%.
I have attached both outputs.
--
Jens Axboe
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8client.txt.bz2
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32client.txt.bz2
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