From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: lkp@lists.01.org
Subject: Re: [kernfs] ea7c5fc39a: stress-ng.stream.ops_per_sec 11827.2% improvement
Date: Sat, 06 Jun 2020 20:18:02 +0200 [thread overview]
Message-ID: <20200606181802.GA15638@kroah.com> (raw)
In-Reply-To: <20200606155216.GU12456@shao2-debian>
[-- Attachment #1: Type: text/plain, Size: 569 bytes --]
On Sat, Jun 06, 2020 at 11:52:16PM +0800, kernel test robot wrote:
> Greeting,
>
> FYI, we noticed a 11827.2% improvement of stress-ng.stream.ops_per_sec due to commit:
>
>
> commit: ea7c5fc39ab005b501e0c7666c29db36321e4f74 ("[PATCH 1/4] kernfs: switch kernfs to use an rwsem")
> url: https://github.com/0day-ci/linux/commits/Ian-Kent/kernfs-proposed-locking-and-concurrency-improvement/20200525-134849
>
Seriously? That's a huge performance increase, and one that feels
really odd. Why would a stress-ng test be touching sysfs?
thanks,
greg k-h
WARNING: multiple messages have this Message-ID (diff)
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: kernel test robot <rong.a.chen@intel.com>
Cc: Ian Kent <raven@themaw.net>,
Andrew Morton <akpm@linux-foundation.org>,
Al Viro <viro@zeniv.linux.org.uk>, Tejun Heo <tj@kernel.org>,
Rick Lindsley <ricklind@linux.vnet.ibm.com>,
Stephen Rothwell <sfr@canb.auug.org.au>,
David Howells <dhowells@redhat.com>,
Miklos Szeredi <miklos@szeredi.hu>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Kernel Mailing List <linux-kernel@vger.kernel.org>,
lkp@lists.01.org
Subject: Re: [kernfs] ea7c5fc39a: stress-ng.stream.ops_per_sec 11827.2% improvement
Date: Sat, 6 Jun 2020 20:18:02 +0200 [thread overview]
Message-ID: <20200606181802.GA15638@kroah.com> (raw)
In-Reply-To: <20200606155216.GU12456@shao2-debian>
On Sat, Jun 06, 2020 at 11:52:16PM +0800, kernel test robot wrote:
> Greeting,
>
> FYI, we noticed a 11827.2% improvement of stress-ng.stream.ops_per_sec due to commit:
>
>
> commit: ea7c5fc39ab005b501e0c7666c29db36321e4f74 ("[PATCH 1/4] kernfs: switch kernfs to use an rwsem")
> url: https://github.com/0day-ci/linux/commits/Ian-Kent/kernfs-proposed-locking-and-concurrency-improvement/20200525-134849
>
Seriously? That's a huge performance increase, and one that feels
really odd. Why would a stress-ng test be touching sysfs?
thanks,
greg k-h
next prev parent reply other threads:[~2020-06-06 18:18 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-25 5:46 [PATCH 0/4] kernfs: proposed locking and concurrency improvement Ian Kent
2020-05-25 5:47 ` [PATCH 1/4] kernfs: switch kernfs to use an rwsem Ian Kent
2020-06-06 15:52 ` [kernfs] ea7c5fc39a: stress-ng.stream.ops_per_sec 11827.2% improvement kernel test robot
2020-06-06 15:52 ` kernel test robot
2020-06-06 18:18 ` Greg Kroah-Hartman [this message]
2020-06-06 18:18 ` Greg Kroah-Hartman
2020-06-07 1:13 ` Ian Kent
2020-06-11 2:06 ` kernel test robot
2020-06-11 2:06 ` kernel test robot
2020-06-11 2:20 ` Rick Lindsley
2020-06-11 2:20 ` Rick Lindsley
2020-06-11 3:02 ` Ian Kent
2020-06-11 3:02 ` Ian Kent
2020-06-07 8:40 ` [PATCH 1/4] kernfs: switch kernfs to use an rwsem Ian Kent
2020-06-08 9:58 ` Ian Kent
2020-05-25 5:47 ` [PATCH 2/4] kernfs: move revalidate to be near lookup Ian Kent
2020-05-25 5:47 ` [PATCH 3/4] kernfs: improve kernfs path resolution Ian Kent
2020-05-25 5:47 ` [PATCH 4/4] kernfs: use revision to identify directory node changes Ian Kent
2020-05-25 6:16 ` [PATCH 0/4] kernfs: proposed locking and concurrency improvement Greg Kroah-Hartman
2020-05-25 7:23 ` Ian Kent
2020-05-25 7:31 ` Greg Kroah-Hartman
2020-05-27 12:44 ` Rick Lindsley
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