From: Corinna Vinschen <vinschen@redhat.com>
To: newlib@sourceware.org
Subject: Re: [PATCH] aarch64: optimize the unaligned case of memcmp
Date: Mon, 26 Jun 2017 08:23:00 -0000 [thread overview]
Message-ID: <20170626082329.GB6201@calimero.vinschen.de> (raw)
In-Reply-To: <1498249389-27204-1-git-send-email-s.pop@samsung.com>
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On Jun 23 15:23, Sebastian Pop wrote:
> This brings to newlib a performance improvement that we developed in Bionic
> libc. That change has been submitted for review to Bionic libc:
> https://android-review.googlesource.com/418279
>
> A similar patch has been submitted for review in glibc:
> https://sourceware.org/ml/libc-alpha/2017-06/msg01143.html
>
> Patch written by Vikas Sinha and Sebastian Pop.
>
> The performance was measured on the bionic-benchmarks on a hikey (aarch64 8xA53)
> board. There was no performance change to the existing benchmark
> and a performance improvement on the new benchmark for memcmp
> on the unaligned side. The new benchmark has been submitted for
> review at https://android-review.googlesource.com/414860
>
> The overall performance improves by 18% for the small data set 8
> and the performance improves by 450% for the large data set 64k.
>
> The base is with the libc from /system/lib64. The bionic libc
> with this patch is in /data.
> [...]
> newlib/libc/machine/aarch64/memcmp.S | 57 ++++++++++++++++++++++++++++++++++--
Pushed.
Thanks,
Corinna
--
Corinna Vinschen
Cygwin Maintainer
Red Hat
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prev parent reply other threads:[~2017-06-26 8:23 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-23 20:23 Sebastian Pop
2017-06-26 8:23 ` Corinna Vinschen [this message]
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