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? -- Ben Widawsky, Intel Open Source Technology Center -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
