From: Kemeng Shi <shikemeng@huawei.com>
To: Borislav Petkov <bp@alien8.de>
Cc: tglx@linutronix.de, mingo@redhat.com, x86@kernel.org,
hpa@zytor.com, linux-kernel@vger.kernel.org,
linux-nvdimm@lists.01.org
Subject: Re: [PATCH] x86: Accelerate copy_page with non-temporal in X86
Date: Wed, 14 Apr 2021 13:25:20 +0800 [thread overview]
Message-ID: <7854092f-f37a-f95c-132a-1b2896d582fc@huawei.com> (raw)
In-Reply-To: <20210413145315.GF16519@zn.tnic>
on 2021/4/13 22:53, Borislav Petkov wrote:
> I thought "should be better" too last time when I measured rep; movs vs
> NT stores but actual measurements showed no real difference.
Mabye the NT stores make difference when store to slow dimms, like the
persistent memory I just tested. Also, it likely reduces unnecessary cache
load and flush, and benifits the running processes which have data cached.
--
Best wishes
Kemeng Shi
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prev parent reply other threads:[~2021-04-14 5:25 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <3f28adee-8214-fa8e-b368-eaf8b193469e@huawei.com>
2021-04-13 11:01 ` [PATCH] x86: Accelerate copy_page with non-temporal in X86 Borislav Petkov
2021-04-13 12:54 ` Kemeng Shi
2021-04-13 14:53 ` Borislav Petkov
2021-04-14 5:25 ` Kemeng Shi [this message]
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