From: 赵军奎 <bernard@vivo.com>
To: Matthew Wilcox <willy@infradead.org>
Cc: Christoph Lameter <cl@linux.com>,
Pekka Enberg <penberg@kernel.org>,
David Rientjes <rientjes@google.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
opensource.kernel@vivo.com
Subject: Re:Re: [PATCH V2] kmalloc_index optimization(code size & runtime stable)
Date: Tue, 21 Apr 2020 19:55:03 +0800 (GMT+08:00) [thread overview]
Message-ID: <AGEAdwClCFexXOQCGFZtCqqi.3.1587470103606.Hmail.bernard@vivo.com> (raw)
In-Reply-To: <20200421111849.GL5820@bombadil.infradead.org>
From: Matthew Wilcox <willy@infradead.org>
Date: 2020-04-21 19:18:49
To: 1587089010-110083-1-git-send-email-bernard@vivo.com
Cc: Christoph Lameter <cl@linux.com>,Pekka Enberg <penberg@kernel.org>,David Rientjes <rientjes@google.com>,Joonsoo Kim <iamjoonsoo.kim@lge.com>,Andrew Morton <akpm@linux-foundation.org>,linux-mm@kvack.org,linux-kernel@vger.kernel.org,opensource.kernel@vivo.com,Bernard Zhao <bernard@vivo.com>
Subject: Re: [PATCH V2] kmalloc_index optimization(code size & runtime stable)>On Mon, Apr 20, 2020 at 08:25:01PM -0700, Bernard Zhao wrote:
>> kmalloc_index inline function code size optimization and runtime
>> performance stability optimization. After optimization, the function
>> kmalloc_index is more stable, the size will never affecte the function`s
>> execution efficiency.
>
>Please stop posting this patch until it's faster *for small sizes*.
>As I explained last time you posted it, it's not an optimisation.
>
>> size time/Per 100 million times
>> old fun new fun with optimise
>> 8 203777 241934
>> 16 245611 409278
>> 32 236384 408419
>> 64 275499 447732
>> 128 354909 416439
>
>^^^^ these are the important cases that need to be fast.
>
Sure, i just received some kbuild compiler error mails and prompt me to do something?
I don`t know why this happened, so i update the patch again.
Regards,
Bernard
next prev parent reply other threads:[~2020-04-21 11:55 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-21 3:25 [PATCH V2] kmalloc_index optimization(code size & runtime stable) Bernard Zhao
2020-04-21 11:18 ` Matthew Wilcox
2020-04-21 11:55 ` 赵军奎 [this message]
2020-04-21 14:36 ` Matthew Wilcox
2020-04-22 1:12 ` 赵军奎
2020-04-21 13:13 ` Vlastimil Babka
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