linux-kernel - Re: [linus:master] [sched/fair] 155213a2ae: unixbench.throughput 23.2% regression

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Message-ID: <4b552080-5299-4234-b101-eab04b21bb74@intel.com>
Date: Fri, 15 Aug 2025 11:18:04 +0800
From: "Chen, Yu C" <yu.c.chen@...el.com>
To: kernel test robot <oliver.sang@...el.com>, Chris Mason <clm@...com>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>, Vincent Guittot
	<vincent.guittot@...aro.org>, <pan.deng@...el.com>, <yu.ma@...el.com>,
	<aubrey.li@...ux.intel.com>
Subject: Re: [linus:master] [sched/fair] 155213a2ae: unixbench.throughput
 23.2% regression

Hi Oliver,

On 8/15/2025 11:14 AM, kernel test robot wrote:
> 
> 
> Hello,
> 
> 
> we reported a "22.9% regression of unixbench.throughput" for this patch in
> https://lore.kernel.org/all/202507150846.538fc133-lkp@intel.com/
> where there are some discussions.
> 
> later we also reported
> "[tip:sched/core] [sched/fair]  155213a2ae:  unixbench.throughput 20.2% regression"
> in
> https://lore.kernel.org/all/202507281046.e71b853a-lkp@intel.com/
> 
> 
> since now the commit is in mainline, we rebuild the kernel and rerun the tests,
> still observed similar regression. below full report is just FYI.
> 

Peter has suggested some directions for the fix, will take a look next week.

thanks,
Chenyu