[Public] > -----Original Message----- > From: amd-gfx <amd-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of Leo Li > Sent: Tuesday, October 1, 2024 4:07 PM > To: Limonciello, Mario <Mario.Limonciello@xxxxxxx>; John Rowley > <lkml@xxxxxxxxxxxxx>; Mahfooz, Hamza <Hamza.Mahfooz@xxxxxxx> > Cc: Wentland, Harry <Harry.Wentland@xxxxxxx>; Siqueira, Rodrigo > <Rodrigo.Siqueira@xxxxxxx>; amd-gfx@xxxxxxxxxxxxxxxxxxxxx; > regressions@xxxxxxxxxxxxxxx > Subject: Re: [REGRESSION][BISECTED] 58a261bfc967: choppy GPU > performance > > > > > On 2024-10-01 15:10, Mario Limonciello wrote: > > On 10/1/2024 14:09, John Rowley wrote: > >> I was using power-profiles-daemon version 0.23 in balanced mode. > >> > >> I also tested TLP, and vanilla kernel without any power daemons running. > >> Without any daemons I use the following: > >> > >> energy_performance_preference: balance_power > >> > >> scaling_driver: amd-pstate-epp > >> > >> scaling_governor: powersave > >> > > > > Thanks as long as it can reproduce in 'balanced' mode that should > > exclude PPD from being the cause and it most likely a pure kernel bug. > > > > I'm curious if you have a PSR supported panel. Does setting > amdgpu.dcdebugmask=0x10 on your kernel cmdline help? This force disables > PSR. > > Another flag to try is amdgpu.dcdebugmask=0x800, which allows PSR but disables > idle power optimizations. I wonder if that may be causing extra latency. For reference, this is also being tracked here: https://gitlab.freedesktop.org/drm/amd/-/issues/3658 Alex > > - Leo
