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, 04 Apr 2017 22:00:07 +1000 [thread overview]
Message-ID: <874ly4v0vs.fsf@concordia.ellerman.id.au> (raw)
In-Reply-To: <20170330071613.GE4762@naverao1-tp.localdomain>
"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.
cheers
next prev parent reply other threads:[~2017-04-04 12:00 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 [this message]
2017-04-18 6:45 ` Michael Ellerman
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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