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 -- Lewis Lewis@xxxxxxxxxxxx 0782 588 4158 -- 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
