Re: [Intel-gfx] [PATCH 1/4] drm/i915/perf: rework aging tail workaround

2020-03-19 Thread Dixit, Ashutosh
Discussed with Umesh today. Below is what we came up with. On Tue, 17 Mar 2020 17:03:30 -0700, Lionel Landwerlin wrote: > On 16/03/2020 21:23, Dixit, Ashutosh wrote: > > On Thu, 12 Mar 2020 16:04:59 -0700, Umesh Nerlige Ramappa wrote: > >> From: Lionel Landwerlin > >> > >> We're about to introduc

Re: [Intel-gfx] [PATCH 1/4] drm/i915/perf: rework aging tail workaround

2020-03-17 Thread Lionel Landwerlin
On 16/03/2020 21:23, Dixit, Ashutosh wrote: On Thu, 12 Mar 2020 16:04:59 -0700, Umesh Nerlige Ramappa wrote: From: Lionel Landwerlin We're about to introduce an options to open the perf stream, giving the user ability to configure how often it wants the kernel to poll the OA registers for avai

Re: [Intel-gfx] [PATCH 1/4] drm/i915/perf: rework aging tail workaround

2020-03-16 Thread Dixit, Ashutosh
On Thu, 12 Mar 2020 16:04:59 -0700, Umesh Nerlige Ramappa wrote: > > From: Lionel Landwerlin > > We're about to introduce an options to open the perf stream, giving > the user ability to configure how often it wants the kernel to poll > the OA registers for available data. > > Right now the workar

Re: [Intel-gfx] [PATCH 1/4] drm/i915/perf: rework aging tail workaround

2020-03-13 Thread Lionel Landwerlin
On 13/03/2020 01:04, Umesh Nerlige Ramappa wrote: From: Lionel Landwerlin We're about to introduce an options to open the perf stream, giving the user ability to configure how often it wants the kernel to poll the OA registers for available data. Right now the workaround against the OA tail po

[Intel-gfx] [PATCH 1/4] drm/i915/perf: rework aging tail workaround

2020-03-12 Thread Umesh Nerlige Ramappa
From: Lionel Landwerlin We're about to introduce an options to open the perf stream, giving the user ability to configure how often it wants the kernel to poll the OA registers for available data. Right now the workaround against the OA tail pointer race condition requires at least twice the int