From: hch@infradead.org (Christoph Hellwig)
Subject: NVMe APST high latency power states being skipped
Date: Fri, 26 May 2017 02:25:56 -0700 [thread overview]
Message-ID: <20170526092556.GA645@infradead.org> (raw)
In-Reply-To: <CAAd53p7o4VRcb1=EE5Vx7rMAfxdpKGceAeVfaCuDrvUaV6x65g@mail.gmail.com>
On Thu, May 25, 2017@04:21:07PM +0800, Kai-Heng Feng wrote:
> I did some benchmark on the high latency SanDisk A400:
> Kernel compilation, no PS3/PS4:
> real 23m36.466s
> user 115m49.944s
> sys 10m58.352s
>
> Kernel compilation, allow PS3/PS4:
> real 24m40.308s
> user 116m12.600s
> sys 11m47.484s
That's quite a bit of a slow down. Can we play a bit with the
entry latency (maybe just for PS4) so that we still get into the
modes, but not as quickly?
next prev parent reply other threads:[~2017-05-26 9:25 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-22 9:04 NVMe APST high latency power states being skipped Kai-Heng Feng
2017-05-23 7:17 ` Christoph Hellwig
2017-05-23 8:06 ` Kai-Heng Feng
2017-05-23 9:42 ` Christoph Hellwig
2017-05-23 19:35 ` Andy Lutomirski
2017-05-23 19:56 ` Mario.Limonciello
2017-05-23 20:01 ` Andy Lutomirski
2017-05-23 20:19 ` Mario.Limonciello
2017-05-23 21:11 ` Andy Lutomirski
2017-05-23 22:09 ` Mario.Limonciello
2017-05-24 4:53 ` Kai-Heng Feng
2017-05-24 5:31 ` Andy Lutomirski
2017-05-25 8:21 ` Kai-Heng Feng
2017-05-26 9:25 ` Christoph Hellwig [this message]
2017-06-01 8:19 ` Kai-Heng Feng
2017-06-01 11:32 ` Christoph Hellwig
2017-06-02 7:08 ` Kai-Heng Feng
2017-06-02 7:13 ` Christoph Hellwig
2017-06-06 9:54 ` Christoph Hellwig
2017-06-06 15:57 ` Andy Lutomirski
2017-06-07 6:19 ` Kai-Heng Feng
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