linux-kernel - Re: This is the fourth time I've tried to find what led to the regression of outgoing network speed and each time I find the merge commit 8c94ccc7cd691472461448f98e2372c75849406c

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Message-ID: <960fd112b294a902e1bea1fdd8e04a708a05cf45.camel@gmail.com>
Date: Tue, 27 Feb 2024 23:03:45 +0500
From: mikhail.v.gavrilov@...il.com
To: Thomas Gleixner <tglx@...utronix.de>, Mathias Nyman
	 <mathias.nyman@...ux.intel.com>, Linux regressions mailing list
	 <regressions@...ts.linux.dev>
Cc: "Christian A. Ehrhardt" <lk@...e.de>, niklas.neronin@...ux.intel.com, 
 Linux List Kernel Mailing <linux-kernel@...r.kernel.org>, Greg KH
 <gregkh@...uxfoundation.org>, linux-usb@...r.kernel.org,  x86@...nel.org,
 netdev@...r.kernel.org, Randy Dunlap <rdunlap@...radead.org>
Subject: Re: This is the fourth time I've tried to find what led to the
 regression of outgoing network speed and each time I find the merge commit
 8c94ccc7cd691472461448f98e2372c75849406c

On Tue, 2024-02-27 at 18:23 +0100, Thomas Gleixner wrote:
> If we want to understand why CPU0 is problematic, then you need to
> use tracing to capture what's going on on CPU0 vs. other CPUs.

I am not hear what kind of profiler software you prefer.
I famous with sysprof and attach here captures for both cases CPU0 vs
CPU23. I hope this helps clear things up.


Thanks!

-- 
Best Regards,
Mike Gavrilov.

Download attachment "capture-CPU0.zip" of type "application/zip" (3585466 bytes)

Download attachment "capture_CPU23.zip" of type "application/zip" (3576676 bytes)