linux-kernel - Re: [PATCH] x86/fred: Optimize the FRED entry by prioritizing high-probability event dispatching

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Message-ID: <ba743e9e-0208-4420-8ecb-fd6973ee893e@zytor.com>
Date: Thu, 16 Jan 2025 10:45:23 -0800
From: Xin Li <xin@...or.com>
To: Nikolay Borisov <nik.borisov@...e.com>,
        Ethan Zhao <haifeng.zhao@...ux.intel.com>,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: tglx@...utronix.de, dave.hansen@...ux.intel.com, x86@...nel.org,
        hpa@...or.com, andrew.cooper3@...rix.com, mingo@...hat.com,
        bp@...en8.de, etzhao@...look.com
Subject: Re: [PATCH] x86/fred: Optimize the FRED entry by prioritizing
 high-probability event dispatching

On 1/16/2025 7:08 AM, Nikolay Borisov wrote:
> 
> 
> On 16.01.25 г. 8:51 ч., Ethan Zhao wrote:
>> External interrupts (EVENT_TYPE_EXTINT) and system calls 
>> (EVENT_TYPE_OTHER)
>> occur more frequently than other events in a typical system. Prioritizing
>> these events saves CPU cycles and optimizes the efficiency of 
>> performance-
>> critical paths.
>>
> <snip>
> 
> Can you also include some performance numbers?

not a good time yet :)