Messages in this thread | | | From | Rahul Rameshbabu <> | 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 | Date | Fri, 02 Feb 2024 17:08:02 -0800 |
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On Sat, 03 Feb, 2024 06:02:15 +0500 Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com> wrote: > Hi, > I'm trying to find the first bad commit that led to a decreased > network outgoing speed. > And every time I come to a huge merge [Merge tag 'usb-6.8-rc1' of > git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb] > I have already triple-checked all my answers and speed measurements. > I don't understand where I'm making a mistake.
Have you tried using --first-parent when you git bisect to see if that helps you find the culprit aside from the merge commit you keep hitting?
https://git-scm.com/docs/git-bisect#Documentation/git-bisect.txt---first-parent
> > Let's try to figure it out together. > > Input data: > Two computers connected 1Gbps link. > Both have the same hardware. > Network: RTL8125 2.5GbE Controller (rev 05) > > When I copy files from one computer to another and kernel snapshot > builded from commit 296455ade1fd I have 97-110MB/sec which is almost > max speed of 1Gbps link. > When I move to commit 9d1694dc91ce I have only 66-70MB/sec which is > significantly slower. > > I bisected the issue by measuring network speed on each step. > I save all results to file [1] > > [1] file is attached as a zip archive. > > # first bad commit: [8c94ccc7cd691472461448f98e2372c75849406c] Merge > tag 'usb-6.8-rc1' of > git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
-- Thanks,
Rahul Rameshbabu
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