Re: qemu-nbd performance regression in bd2cd4a4

2023-04-12 Thread Lukáš Doktor
I see, let me mark it as "expected" regression and hopefully I'll detect the optimization if they are ever implemented. Thank you for the explanation. Regards, Lukáš Dne 06. 04. 23 v 17:07 Eric Blake napsal(a): > On Thu, Apr 06, 2023 at 12:55:38PM +0200, Lukáš Doktor wrote: >> Hello Florian, fol

Re: qemu-nbd performance regression in bd2cd4a4

2023-04-06 Thread Eric Blake
On Thu, Apr 06, 2023 at 12:55:38PM +0200, Lukáš Doktor wrote: > Hello Florian, folks, > > my CI caught ~5% regression (in 60s runs, when using 240s it was about 10%) > in qemu-nbd performance bisected multiple-times up to > bd2cd4a441ded163b62371790876f28a9b834317 in fio when using 4k blocks rea

Re: qemu-nbd performance regression in bd2cd4a4

2023-04-06 Thread Florian Westphal
Lukáš Doktor wrote: > Fio job (executed via pbench, let me know if you need simplified steps with > fio only): That would be useful, thanks. I suspect revert is useless because upcoming TCP_NODELAY change will increase small packet rate too.