From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: Aaro Koskinen <aaro.koskinen@nokia.com>
Cc: "linux-arm-kernel@lists.arm.linux.org.uk"
<linux-arm-kernel@lists.arm.linux.org.uk>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"hugh@veritas.com" <hugh@veritas.com>
Subject: Re: [PATCH] [ARM] Flush only the needed range when unmapping a VMA
Date: Sun, 15 Mar 2009 10:27:51 +0000 [thread overview]
Message-ID: <20090315102751.GD3963@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <49BA4541.6000708@nokia.com>
On Fri, Mar 13, 2009 at 01:36:33PM +0200, Aaro Koskinen wrote:
> shm segment size 4096000 bytes
> real 0m 0.12s
> user 0m 0.02s
> sys 0m 0.10s
> shm segment size 8192000 bytes
> real 0m 0.36s
> user 0m 0.00s
> sys 0m 0.35s
...
> shm segment size 4096000 bytes
> real 0m 0.07s
> user 0m 0.01s
> sys 0m 0.05s
> shm segment size 8192000 bytes
> real 0m 0.13s
> user 0m 0.02s
> sys 0m 0.10s
Yes, that's quite a speedup. Can you provide some words in the patch
description which indicate that we have about a 3x speed increase for
8M mappings, which only gets better for larger mappings?
Given that this patch is now only touching ARM, is there any need to
indicate that it was CC'd to Hugh when it gets committed?
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next prev parent reply other threads:[~2009-03-15 10:28 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-09 12:56 [RFC PATCH 0/2] mm: tlb: unmap scalability Aaro Koskinen
2009-03-09 12:59 ` [RFC PATCH 1/2] mm: tlb: Add range to tlb_start_vma() and tlb_end_vma() Aaro Koskinen
2009-03-09 12:59 ` [RFC PATCH 2/2] ARM: tlb: Use range in " Aaro Koskinen
2009-03-09 14:16 ` [RFC PATCH 1/2] mm: tlb: Add range to " Hugh Dickins
2009-03-09 17:00 ` Aaro Koskinen
2009-03-09 18:20 ` Hugh Dickins
2009-03-10 13:01 ` [PATCH] [ARM] Flush only the needed range when unmapping a VMA Aaro Koskinen
2009-03-10 14:49 ` Hugh Dickins
2009-03-12 21:30 ` Russell King - ARM Linux
2009-03-13 11:36 ` Aaro Koskinen
2009-03-15 10:27 ` Russell King - ARM Linux [this message]
2009-03-16 12:58 ` Aaro Koskinen
2009-03-16 13:30 ` [PATCH v2] " Aaro Koskinen
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