From: Robert Richter <robert.richter@cavium.com>
To: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Hanjun Guo <hanjun.guo@linaro.org>,
Russell King <linux@armlinux.org.uk>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
David Daney <david.daney@cavium.com>,
Mark Rutland <mark.rutland@arm.com>,
James Morse <james.morse@arm.com>,
Yisheng Xie <xieyisheng1@huawei.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: [PATCH v3] arm64: mm: Fix NOMAP page initialization
Date: Mon, 9 Jan 2017 12:53:20 +0100 [thread overview]
Message-ID: <20170109115320.GI4930@rric.localdomain> (raw)
In-Reply-To: <CAKv+Gu8-+0LUTN0+8OGWRhd22Ls5cMQqTJcjKQK_0N=Uc-0jog@mail.gmail.com>
On 06.01.17 08:37:25, Ard Biesheuvel wrote:
> Any comments on the performance impact (including boot time) ?
I did a kernel compile test and kernel mode time increases by about
2.2%. Though this is already significant, we need a more suitable mem
benchmark here for further testing.
For boot time I dont see significant changes.
-Robert
Boot times:
pfn_valid_within():
[ 25.929134]
[ 25.548830]
[ 25.503225]
early_pfn_valid() v3:
[ 25.773814]
[ 25.548428]
[ 25.765290]
Kernel compile times (3 runs each):
pfn_valid_within():
real 6m4.088s
user 372m57.607s
sys 16m55.158s
real 6m1.532s
user 372m48.453s
sys 16m50.370s
real 6m4.061s
user 373m18.753s
sys 16m57.027s
early_pfn_valid() v3:
real 6m3.261s
user 373m15.816s
sys 16m30.019s
real 6m2.980s
user 373m9.019s
sys 16m32.992s
real 6m2.574s
user 372m45.146s
sys 16m33.218s
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next prev parent reply other threads:[~2017-01-09 11:53 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-16 16:54 [PATCH v3] arm64: mm: Fix NOMAP page initialization Robert Richter
2017-01-04 13:56 ` Ard Biesheuvel
2017-01-05 2:03 ` Hanjun Guo
2017-01-06 1:07 ` Hanjun Guo
2017-01-06 4:49 ` Prakash B
2017-01-06 5:22 ` Prakash B
2017-01-09 5:09 ` Hanjun Guo
2017-01-09 6:15 ` Prakash B
2017-01-06 8:37 ` Ard Biesheuvel
2017-01-09 5:14 ` Hanjun Guo
2017-01-09 11:53 ` Robert Richter [this message]
2017-01-12 16:05 ` Will Deacon
2017-01-12 18:58 ` Robert Richter
2017-01-13 9:19 ` Will Deacon
2017-01-13 13:15 ` Robert Richter
2017-01-17 10:00 ` Robert Richter
2017-01-17 19:16 ` Will Deacon
2017-02-03 15:14 ` Robert Richter
2017-02-03 18:16 ` Will Deacon
2017-01-05 11:03 ` Robert Richter
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