From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
benh@kernel.crashing.org, paulus@samba.org
Cc: linuxppc-dev@lists.ozlabs.org,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Subject: Re: [V2] powerpc/mm/radix: Update pte fragment count from 16 to 256 on radix
Date: Thu, 5 Apr 2018 00:39:49 +1000 (AEST) [thread overview]
Message-ID: <40GTBZ061Xz9s1r@ozlabs.org> (raw)
In-Reply-To: <20180322084350.21249-1-aneesh.kumar@linux.vnet.ibm.com>
On Thu, 2018-03-22 at 08:43:50 UTC, "Aneesh Kumar K.V" wrote:
> Right now we use only 4K out of the 64k page allocated for the level 4 page
> table. W.r.t the performance impact due to lock contention, with ebizzy
>
> 256 threads:
> without patch (10 runs of ./ebizzy -m -n 1000 -s 131072 -S 100)
> median = 15678.5
> stdev = 42.1209
>
> with patch:
> median = 15354
> stdev = 194.743
>
> This is with THP disabled. With THP enabled the impact of the patch will be less.
>
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/fb4e5dbd44564077fa0267a59b4596
cheers
prev parent reply other threads:[~2018-04-04 14:39 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-22 8:43 [PATCH V2] powerpc/mm/radix: Update pte fragment count from 16 to 256 on radix Aneesh Kumar K.V
2018-04-04 14:39 ` Michael Ellerman [this message]
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