On Tue, Jun 10, 2014 at 08:59:32PM +0100, Lewis Toohey wrote: > On 10 June 2014 17:58, Ben Widawsky <ben@xxxxxxxxxxxx> wrote: > > On Tue, Jun 10, 2014 at 01:33:51PM +0800, Aaron Lu wrote: > >> +Ben Widawsky & Daniel Vetter > >> > >> On 06/09/2014 03:38 PM, Lewis Toohey wrote: > >> > On 3 June 2014 02:22, Aaron Lu <aaron.lu@xxxxxxxxx> wrote: > >> >> On 05/30/2014 09:12 PM, Lewis Toohey wrote: > >> >>> Aaron > >> >>> > >> >>> I am in the process of performing this bisection, however, I need a > >> >>> bit of advice. > >> >>> > >> >>> I have got a mix of results following suspend right through from (i) > >> >>> system reboot; (ii) "low graphics mode" error; (iii) restore but > >> >>> sluggish performance; and (iv) restore but *very* sluggish > >> >>> performance. > >> >> > >> >> Is the sluggish performance experienced with a GUI environment? > >> >> > >> >>> > >> >>> What should qualify as a bad commit? Anything other than a "perfect" restore? > >> >> > >> >> I think ii/iii/iv all qualify as bad, if there is no such problem > >> >> in previous kernels. And yes, a perfect restore is expected, assume > >> >> the system is able to do a perfect restore with old kernels. > >> >> > >> >> Thanks, > >> >> Aaron > >> >> > >> >>> > >> >>> Many thanks > >> >>> > >> > > >> > Hi Aaron > >> > > >> > Firstly, yes the sluggish performance I was referring to is > >> > experienced in the GUI environment. Jerky graphics and CPU fan appears > >> > to max out and stay there. Old kernels (e.g. the Ubuntu default > >> > kernel) do not do this and just restore perfectly. > >> > > >> > I have completed the bisect as requested. Please find the full log > >> > below. I am slightly unconvinced, as building the previous commit in > >> > the log still seems to have the same problem, however, that commit is > >> > a "merge" and I don't really know what this means. > >> > > >> > Many thanks > >> > > >> > Bisect Log: > >> > git bisect start > >> > # good: [455c6fdbd219161bd09b1165f11699d6d73de11c] Linux 3.14 > >> > git bisect good 455c6fdbd219161bd09b1165f11699d6d73de11c > >> > # bad: [c9eaa447e77efe77b7fa4c953bd62de8297fd6c5] Linux 3.15-rc1 > >> > git bisect bad c9eaa447e77efe77b7fa4c953bd62de8297fd6c5 > >> > # good: [cd6362befe4cc7bf589a5236d2a780af2d47bcc9] Merge > >> > git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next > >> > git bisect good cd6362befe4cc7bf589a5236d2a780af2d47bcc9 > >> > # good: [d2b150d0647e055d7a71b1c33140280550b27dd6] Merge tag 'sh-3.15' > >> > of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc > >> > git bisect good d2b150d0647e055d7a71b1c33140280550b27dd6 > >> > # good: [5fb6b953bb7aa86a9c8ea760934982cedc45c52b] > >> > include/linux/syscalls.h: add sys_renameat2() prototype > >> > git bisect good 5fb6b953bb7aa86a9c8ea760934982cedc45c52b > >> > # bad: [ffddc5fd19b219f557fd4a81168ce8784a4faced] fs/ncpfs/dir.c: fix > >> > indenting in ncp_lookup() > >> > git bisect bad ffddc5fd19b219f557fd4a81168ce8784a4faced > >> > # bad: [978c6050165bba52eab7ef3581d447eb215def77] Merge branch > >> > 'drm-docs' of ssh://people.freedesktop.org/~danvet/drm into drm-next > >> > git bisect bad 978c6050165bba52eab7ef3581d447eb215def77 > >> > # bad: [262de1453184f65e5ccfe45790f93d41f7339d49] drm/i915: Directly > >> > return the vma from bind_to_vm > >> > git bisect bad 262de1453184f65e5ccfe45790f93d41f7339d49 > >> > # bad: [031994ee8dedfa69d3a7caa43e93f3c282bc38f9] drm/i915: Implement > >> > WaIncreaseL3CreditsForVLVB0:vlv > >> > git bisect bad 031994ee8dedfa69d3a7caa43e93f3c282bc38f9 > >> > # bad: [f72d21eddfa900bfa2674195dcc0203e18d0cc62] drm/i915: Place the > >> > Global GTT VM first in the list of VM > >> > git bisect bad f72d21eddfa900bfa2674195dcc0203e18d0cc62 > >> > # bad: [d6660add648d10e7e35085d8c7d2653e0f9f61b7] drm/i915: Generalize > >> > PPGTT init > >> > git bisect bad d6660add648d10e7e35085d8c7d2653e0f9f61b7 > >> > # bad: [b731d33d05dd5ce6b387cbadb0d9d24cb3732b40] drm/i915: relax > >> > context alignment > >> > git bisect bad b731d33d05dd5ce6b387cbadb0d9d24cb3732b40 > >> > # bad: [a7b910789f77afa40ae0816d22339e9d25723c6e] drm/i915: Add vm to > >> > error BO capture > >> > git bisect bad a7b910789f77afa40ae0816d22339e9d25723c6e > >> > # bad: [6e164c3382314a1f63526fa7a4322a17318d0e32] drm/i915: Allow ggtt > >> > lookups to not WARN > >> > git bisect bad 6e164c3382314a1f63526fa7a4322a17318d0e32 > >> > # bad: [6f425321e02a1b6c5e90b70f8fab7c140fcaeefb] drm/i915: Don't > >> > unconditionally try to deref aliasing ppgtt > >> > git bisect bad 6f425321e02a1b6c5e90b70f8fab7c140fcaeefb > >> > # bad: [e178f7057b81c87a7ceaae0ca204487b6f7eedcf] drm/i915: Provide > >> > PDP updates via MMIO > >> > git bisect bad e178f7057b81c87a7ceaae0ca204487b6f7eedcf > >> > # first bad commit: [e178f7057b81c87a7ceaae0ca204487b6f7eedcf] > >> > drm/i915: Provide PDP updates via MMIO > >> > > >> > >> The commit looks like related, I've added the commit author. > >> > >> Ben, > >> Do you have any suggestions? Does the above commit have any chance of > >> causing sluggish performance problem after a resume? > >> > >> Thanks, > >> Aaron > > > > What this comment actually does is use MMIO writes for the page tables > > after a GPU hang/reset. (What a poorly named commit message). > > > > Can you please provide the full dmesg with the drm.debug=0x2? > > > > Hi Ben > > Thank you for responding. > > Just to verify that I have done this correctly, I added > "drm.debug=0x2" to the kernel command line (in Grub), booted, > suspended and resumed, and then ran Dmesg. > > I wasn't sure exactly where to put it, so please find a copy of the output here: > http://www.toohey.co.uk/dmesg > > I hope that is helpful. If you need any further information please let me know. > > Many thanks > > > I only see radeon stuff in that dmesg. But you did the right thing to grub. -- Ben Widawsky, Intel Open Source Technology Center _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
