From: Michael Ellerman <mpe@ellerman•id.au>
To: "Naveen N. Rao" <naveen.n.rao@linux•vnet.ibm.com>
Cc: Paul Mackerras <paulus@au1•ibm.com>,
linuxppc-dev@lists•ozlabs.org, Anton Blanchard <anton@samba•org>,
Matthew Wilcox <willy@infradead•org>
Subject: Re: [PATCH 1/2] powerpc: string: implement optimized memset variants
Date: Tue, 18 Apr 2017 16:45:00 +1000 [thread overview]
Message-ID: <87k26i6wpf.fsf@concordia.ellerman.id.au> (raw)
In-Reply-To: <874ly4v0vs.fsf@concordia.ellerman.id.au>
Michael Ellerman <mpe@ellerman•id.au> writes:
> "Naveen N. Rao" <naveen.n.rao@linux•vnet.ibm.com> writes:
>> (generic) is with Matt's arch-independent patches applied. Profiling
>> indicates that most of the overhead is actually with the lzo
>> decompression...
>>
>> Also, with a simple module to memset64() a 1GB vmalloc'ed buffer, here
>> are the results:
>> generic: 0.245315533 seconds time elapsed ( +- 1.83% )
>> optimized: 0.169282701 seconds time elapsed ( +- 1.96% )
>
> Great, that's pretty conclusive.
>
> I'm pretty sure I can take these 2 patches independently of Matt's
> series, they just won't be used by much until his series goes in, so
> I'll do that unless someone yells.
Hmm, just went to merge these, but I don't see Matt's series in
linux-next, so I'll hold off for now.
cheers
next prev parent reply other threads:[~2017-04-18 6:45 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-20 21:14 Optimised memset64/memset32 for powerpc Matthew Wilcox
2017-03-20 21:23 ` Benjamin Herrenschmidt
2017-03-21 12:23 ` Christophe LEROY
2017-03-21 13:29 ` Matthew Wilcox
2017-03-21 16:45 ` Segher Boessenkool
2017-03-21 21:26 ` Benjamin Herrenschmidt
2017-03-22 13:18 ` Matthew Wilcox
2017-03-22 19:30 ` Matthew Wilcox
2017-03-27 19:37 ` Naveen N. Rao
2017-03-27 19:37 ` [PATCH 1/2] powerpc: string: implement optimized memset variants Naveen N. Rao
2017-03-28 0:44 ` Michael Ellerman
2017-03-28 10:21 ` Naveen N. Rao
2017-03-29 11:36 ` Michael Ellerman
2017-03-30 7:16 ` Naveen N. Rao
2017-04-04 12:00 ` Michael Ellerman
2017-04-18 6:45 ` Michael Ellerman [this message]
2017-04-05 5:51 ` PrasannaKumar Muralidharan
2017-04-12 15:05 ` Naveen N. Rao
2017-08-18 12:50 ` [1/2] " Michael Ellerman
2017-03-27 19:37 ` [PATCH 2/2] powerpc: bpf: use memset32() to pre-fill traps in BPF page(s) Naveen N. Rao
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