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Date: Mon, 05 May 2008 18:52:50 +0200
From: Nadia Derbey <Nadia.Derbey@...l.net>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: manfred@...orfullife.com, paulmck@...ux.vnet.ibm.com,
linux-kernel@...r.kernel.org, efault@....de
Subject: Re: [PATCH 00/10] Scalability requirements for sysv ipc - v2
Andrew Morton wrote:
> On Tue, 29 Apr 2008 16:33:04 +0200
> Nadia.Derbey@...l.net wrote:
>
>
>>After scalability problems had been detected when using the sysV ipcs, I
>>have proposed to use an RCU based implementation of the IDR api instead
>>(see thread http://lkml.org/lkml/2008/4/11/212).
>>
>>Resending the patch series after
>> . integrating Paul's remarks
>> . fixing a bug I had introduced
>> . porting it to 2.6.25-mm1.
>>
>>Reviewers are still welcome!
>>
>>Patch 1 can be taken alone: it fixes a problem in the existing IDR API.
>>
>>Patches should be applied on linux-2.6.25-mm1, in the following order:
>>
>>[ PATCH 01/10 ] : idr_minor_fix.patch
>>[ PATCH 02/10 ] : ridr_structure.patch
>>[ PATCH 03/10 ] : ridr_pre_get.patch
>>[ PATCH 04/10 ] : ridr_init.patch
>>[ PATCH 05/10 ] : ridr_get_new_above.patch
>>[ PATCH 06/10 ] : ridr_get_new.patch
>>[ PATCH 07/10 ] : ridr_find.patch
>>[ PATCH 08/10 ] : ridr_remove.patch
>>[ PATCH 09/10 ] : ipc_use_ridr.patch
>>[ PATCH 10/10 ] : remove_ipc_lock_down.patch
>>
>
>
> hm, you've been busy.
>
> As all this work is entirely for performance reasons, the changelog should
> have (lots of) performance testing results! Please.
>
>
Here are the results I've got for the pmsg test sent by Manfred:
for i in 1 2 3 4 5 6 7 8;do ./pmsg $i 5;done > output.25_mm1.ref.8
for i in 1 2 3 4 5 6 7 8;do ./pmsg $i 5;done > output.25_mm1.patch.8
2.6.25-mm1 (ref) 2.6.25-mm1(patched)
Total (1 cpu): 876000 985496
Total (2 cpus): 1549592 1740591
Total (3 cpus): 1694370 2327468
Total (4 cpus): 404553 2465787
Total (5 cpus): 391283 3215676
Total (6 cpus): 263249 3849121
Total (7 cpus): 191742 4209866
Total (8 cpus): 141722 4255585
Full output files attached.
Will send the rest tomorrow.
Regards
Nadia
View attachment "output.25_mm1.ref.8" of type "text/x-troff-man" (5846 bytes)
View attachment "output.25_mm1.patch.8" of type "text/x-troff-man" (5852 bytes)
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