Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758594Ab3GZM2F (ORCPT ); Fri, 26 Jul 2013 08:28:05 -0400 Received: from mail-qc0-f172.google.com ([209.85.216.172]:47214 "EHLO mail-qc0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757366Ab3GZM17 (ORCPT ); Fri, 26 Jul 2013 08:27:59 -0400 MIME-Version: 1.0 In-Reply-To: <20130725211521.GE18254@gmail.com> References: <9E84D12D-7389-4D9A-803A-91FD704A92FA@gustavus.edu> <20130725112123.GT27075@twins.programming.kicks-ass.net> <228E8D34-E1A9-4D82-B353-F095E473B8D7@gustavus.edu> <20130725164051.GZ27075@twins.programming.kicks-ass.net> <20130725211521.GE18254@gmail.com> From: Paul Turner Date: Fri, 26 Jul 2013 05:27:27 -0700 Message-ID: Subject: PROBLEM: Persistent unfair sharing of a processor by auto groups in 3.11-rc2 (has twice regressed) To: Max Hailperin , LKML Cc: Ingo Molnar , Peter Zijlstra Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 41687 Lines: 966 [Moving to LKML] Max sent in the following (best ever) bug report: On Wed, Jul 24, 2013 at 8:41 AM, Max Hailperin wrote: > [1.] One line summary of the problem: > Persistent unfair sharing of a processor by auto groups in 3.11-rc2 (has > twice regressed) > > [2.] Full description of the problem/report: > Although I've used bisection to figure out where this problem originated and > have a one-line patch that fixes it, I don't understand the root cause and > don't have any reason to think my patch is the right one. > > If I run a single processor-hogging loop in each of two terminal windows (so > one task in each of two auto groups) and use schedtool to pin each of them > on processor 0, they ought to each get 50% of that processor's time. > However, a substantial fraction of my trials of this experiment (detailed in > section 7 below) produce a different result: the two tasks get persistently > stuck in some ratio other than 50/50. In the screenshot I have attached, > they are running 55/45, but I have observed as extreme as 66/33. Whatever > the ratio is, it remains fixed aside from minor fluctuations for as long as > I let it run, which has been over an hour. This phenomenon doesn't show up > if I boot with nosmp rather than using schedtool or if I disable auto > grouping. The tasks really are getting disproportionate CPU rather than > just looking that way due to some accounting malfunction; I've confirmed > this by having each produce output every N iterations so that I can see they > are running at different rates. > > Bisection reveals that this problem most recently was introduced by commit > 17bc14b767cf0692420c43dbe5310ae98a5a7836 which reverted commit > f269ae0469fc882332bdfb5db15d3c1315fe2a10 (sched: Update_cfs_shares at period > edge). In between these two commits, I consistently get 50/50 sharing aside > from small fluctuations. > > As suggested by the problem having been (re-) introduced by a revert, it was > also present as of the parent commit of the reverted commit (that is, as of > 48a1675323fa1b7844e479ad2a4469f4558c0f79). A second round of bisection > looking backward from there identifies the problem as having initially been > introduced in commit 82958366cfea1a50e7e90907b2d55ae29ed69974 (sched: > Replace update_shares weight distribution with per-entity computation). > > I was able to make the problem go away by applying to 3.11-rc2 the one-line > patch I have attached, which is a subset of the reverted commit. > > [3.] Keywords (i.e., modules, networking, kernel): > sched > > [4.] Kernel information > [4.1.] Kernel version (from /proc/version): > Linux version 3.11.0-rc2 (max@max-st1-Inspiron-5423) (gcc version 4.7.3 > (Ubuntu/Linaro 4.7.3-1ubuntu1) ) #1 SMP Tue Jul 23 13:09:32 CDT 2013 > > [4.2.] Kernel .config file: > See the attached config file. > > [5.] Most recent kernel version which did not have the bug: > See bisection information above. > > [6.] Output of Oops.. message (if applicable) with symbolic information > resolved (see Documentation/oops-tracing.txt) > N/A > > [7.] A small shell script or example program which triggers the > problem (if possible) > In each of two terminal windows give the command > schedtool -a 0 -e bash -c 'while ((1)); do :; done' > while in a third terminal window running top to observe the result. See the > attached screenshot for an example. The results are not consistent, but in > the buggy versions of the kernel, many of the attempts will show the tasks > running in a non-50/50 ratio (persistently). It's never taken me more than a > handful of tries to see the effect. Also, in the cases where the tasks are > running in more or less 50/50, if I stop one with control-z and then restart > it, sometimes that is enough to switch to disproportionate execution. > > [8.] Environment > [8.1.] Software (add the output of the ver_linux script here) > If some fields are empty or look unusual you may have an old version. > Compare to the current minimal requirements in Documentation/Changes. > > Linux max-st1-Inspiron-5423 3.11.0-rc2 #1 SMP Tue Jul 23 13:09:32 CDT 2013 > x86_64 x86_64 x86_64 GNU/Linux > > Gnu C 4.7 > Gnu make 3.81 > binutils 2.23.2 > util-linux 2.20.1 > mount support > module-init-tools 9 > e2fsprogs 1.42.5 > pcmciautils 018 > PPP 2.4.5 > Linux C Library 2.17 > Dynamic linker (ldd) 2.17 > Procps 3.3.3 > Net-tools 1.60 > Kbd 1.15.5 > Sh-utils 8.20 > wireless-tools 30 > Modules Loaded rfcomm parport_pc bnep ppdev arc4 iwldvm mac80211 > i915 snd_hda_codec_hdmi snd_hda_codec_idt snd_hda_intel snd_hda_codec > iwlwifi drm_kms_helper drm uvcvideo btusb videobuf2_vmalloc videobuf2_memops > snd_hwdep videobuf2_core bluetooth snd_pcm videodev joydev snd_page_alloc > snd_seq_midi cfg80211 snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device > snd_timer mei_me lp i2c_algo_bit psmouse snd mei video rts5139 dell_laptop > dcdbas dell_wmi lpc_ich parport sparse_keymap mac_hid serio_raw soundcore > wmi ahci libahci alx mdio > > [8.2.] Processor information (from /proc/cpuinfo): > processor : 0 > vendor_id : GenuineIntel > cpu family : 6 > model : 58 > model name : Intel(R) Core(TM) i3-3217U CPU @ 1.80GHz > stepping : 9 > microcode : 0x15 > cpu MHz : 864.000 > cache size : 3072 KB > physical id : 0 > siblings : 4 > core id : 0 > cpu cores : 2 > apicid : 0 > initial apicid : 0 > fpu : yes > fpu_exception : yes > cpuid level : 13 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat > pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm > constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc > aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 > cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer xsave avx > f16c lahf_lm ida arat epb xsaveopt pln pts dtherm tpr_shadow vnmi > flexpriority ept vpid fsgsbase smep erms > bogomips : 3591.91 > clflush size : 64 > cache_alignment : 64 > address sizes : 36 bits physical, 48 bits virtual > power management: > > processor : 1 > vendor_id : GenuineIntel > cpu family : 6 > model : 58 > model name : Intel(R) Core(TM) i3-3217U CPU @ 1.80GHz > stepping : 9 > microcode : 0x15 > cpu MHz : 990.000 > cache size : 3072 KB > physical id : 0 > siblings : 4 > core id : 1 > cpu cores : 2 > apicid : 2 > initial apicid : 2 > fpu : yes > fpu_exception : yes > cpuid level : 13 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat > pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm > constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc > aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 > cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer xsave avx > f16c lahf_lm ida arat epb xsaveopt pln pts dtherm tpr_shadow vnmi > flexpriority ept vpid fsgsbase smep erms > bogomips : 3591.91 > clflush size : 64 > cache_alignment : 64 > address sizes : 36 bits physical, 48 bits virtual > power management: > > processor : 2 > vendor_id : GenuineIntel > cpu family : 6 > model : 58 > model name : Intel(R) Core(TM) i3-3217U CPU @ 1.80GHz > stepping : 9 > microcode : 0x15 > cpu MHz : 792.000 > cache size : 3072 KB > physical id : 0 > siblings : 4 > core id : 0 > cpu cores : 2 > apicid : 1 > initial apicid : 1 > fpu : yes > fpu_exception : yes > cpuid level : 13 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat > pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm > constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc > aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 > cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer xsave avx > f16c lahf_lm ida arat epb xsaveopt pln pts dtherm tpr_shadow vnmi > flexpriority ept vpid fsgsbase smep erms > bogomips : 3591.91 > clflush size : 64 > cache_alignment : 64 > address sizes : 36 bits physical, 48 bits virtual > power management: > > processor : 3 > vendor_id : GenuineIntel > cpu family : 6 > model : 58 > model name : Intel(R) Core(TM) i3-3217U CPU @ 1.80GHz > stepping : 9 > microcode : 0x15 > cpu MHz : 1116.000 > cache size : 3072 KB > physical id : 0 > siblings : 4 > core id : 1 > cpu cores : 2 > apicid : 3 > initial apicid : 3 > fpu : yes > fpu_exception : yes > cpuid level : 13 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat > pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm > constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc > aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 > cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer xsave avx > f16c lahf_lm ida arat epb xsaveopt pln pts dtherm tpr_shadow vnmi > flexpriority ept vpid fsgsbase smep erms > bogomips : 3591.91 > clflush size : 64 > cache_alignment : 64 > address sizes : 36 bits physical, 48 bits virtual > power management: > > [8.3.] Module information (from /proc/modules): > rfcomm 42539 12 - Live 0x0000000000000000 > parport_pc 32688 0 - Live 0x0000000000000000 > bnep 18036 2 - Live 0x0000000000000000 > ppdev 12934 0 - Live 0x0000000000000000 > arc4 12615 2 - Live 0x0000000000000000 > iwldvm 241420 0 - Live 0x0000000000000000 > mac80211 601324 1 iwldvm, Live 0x0000000000000000 > i915 659650 3 - Live 0x0000000000000000 > snd_hda_codec_hdmi 41176 1 - Live 0x0000000000000000 > snd_hda_codec_idt 50389 1 - Live 0x0000000000000000 > snd_hda_intel 47930 3 - Live 0x0000000000000000 > snd_hda_codec 188542 3 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel, > Live 0x0000000000000000 > iwlwifi 166005 1 iwldvm, Live 0x0000000000000000 > drm_kms_helper 52880 1 i915, Live 0x0000000000000000 > drm 292458 4 i915,drm_kms_helper, Live 0x0000000000000000 > uvcvideo 80784 0 - Live 0x0000000000000000 > btusb 22517 0 - Live 0x0000000000000000 > videobuf2_vmalloc 13056 1 uvcvideo, Live 0x0000000000000000 > videobuf2_memops 13202 1 videobuf2_vmalloc, Live 0x0000000000000000 > snd_hwdep 13602 1 snd_hda_codec, Live 0x0000000000000000 > videobuf2_core 40513 1 uvcvideo, Live 0x0000000000000000 > bluetooth 234284 22 rfcomm,bnep,btusb, Live 0x0000000000000000 > snd_pcm 101975 3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec, Live > 0x0000000000000000 > videodev 133456 2 uvcvideo,videobuf2_core, Live 0x0000000000000000 > joydev 17377 0 - Live 0x0000000000000000 > snd_page_alloc 18710 2 snd_hda_intel,snd_pcm, Live 0x0000000000000000 > snd_seq_midi 13324 0 - Live 0x0000000000000000 > cfg80211 488276 3 iwldvm,mac80211,iwlwifi, Live 0x0000000000000000 > snd_seq_midi_event 14899 1 snd_seq_midi, Live 0x0000000000000000 > snd_rawmidi 30180 1 snd_seq_midi, Live 0x0000000000000000 > snd_seq 65684 2 snd_seq_midi,snd_seq_midi_event, Live 0x0000000000000000 > snd_seq_device 14497 3 snd_seq_midi,snd_rawmidi,snd_seq, Live > 0x0000000000000000 > snd_timer 29370 2 snd_pcm,snd_seq, Live 0x0000000000000000 > mei_me 13684 0 - Live 0x0000000000000000 > lp 17759 0 - Live 0x0000000000000000 > i2c_algo_bit 13413 1 i915, Live 0x0000000000000000 > psmouse 95952 0 - Live 0x0000000000000000 > snd 69134 17 > snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_seq_midi,snd_rawmidi,snd_seq,snd_seq_device,snd_timer, > Live 0x0000000000000000 > mei 54059 1 mei_me, Live 0x0000000000000000 > video 19327 1 i915, Live 0x0000000000000000 > rts5139 315256 0 - Live 0x0000000000000000 (C) > dell_laptop 17369 0 - Live 0x0000000000000000 > dcdbas 14397 1 dell_laptop, Live 0x0000000000000000 > dell_wmi 12681 0 - Live 0x0000000000000000 > lpc_ich 21080 0 - Live 0x0000000000000000 > parport 42214 3 parport_pc,ppdev,lp, Live 0x0000000000000000 > sparse_keymap 13890 1 dell_wmi, Live 0x0000000000000000 > mac_hid 13205 0 - Live 0x0000000000000000 > serio_raw 13253 0 - Live 0x0000000000000000 > soundcore 12680 1 snd, Live 0x0000000000000000 > wmi 19070 1 dell_wmi, Live 0x0000000000000000 > ahci 29915 2 - Live 0x0000000000000000 > libahci 31885 1 ahci, Live 0x0000000000000000 > alx 32175 0 - Live 0x0000000000000000 > mdio 13807 1 alx, Live 0x0000000000000000 > > [8.4.] Loaded driver and hardware information (/proc/ioports, /proc/iomem) > 0000-0cf7 : PCI Bus 0000:00 > 0000-001f : dma1 > 0020-0021 : pic1 > 0040-0043 : timer0 > 0050-0053 : timer1 > 0060-0060 : keyboard > 0064-0064 : keyboard > 0070-0077 : rtc0 > 0080-008f : dma page reg > 00a0-00a1 : pic2 > 00c0-00df : dma2 > 00f0-00ff : fpu > 0400-0403 : ACPI PM1a_EVT_BLK > 0404-0405 : ACPI PM1a_CNT_BLK > 0408-040b : ACPI PM_TMR > 0410-0415 : ACPI CPU throttle > 0420-042f : ACPI GPE0_BLK > 0430-0433 : iTCO_wdt > 0450-0450 : ACPI PM2_CNT_BLK > 0454-0457 : pnp 00:05 > 0458-047f : pnp 00:03 > 0460-047f : iTCO_wdt > 04d0-04d1 : pnp 00:07 > 0500-057f : pnp 00:03 > 0680-069f : pnp 00:03 > 0cf8-0cff : PCI conf1 > 0d00-ffff : PCI Bus 0000:00 > 1000-100f : pnp 00:03 > 164e-164f : pnp 00:03 > e000-efff : PCI Bus 0000:09 > e000-e07f : 0000:09:00.0 > f000-f03f : 0000:00:02.0 > f040-f05f : 0000:00:1f.3 > f060-f07f : 0000:00:1f.2 > f060-f07f : ahci > f080-f083 : 0000:00:1f.2 > f080-f083 : ahci > f090-f097 : 0000:00:1f.2 > f090-f097 : ahci > f0a0-f0a3 : 0000:00:1f.2 > f0a0-f0a3 : ahci > f0b0-f0b7 : 0000:00:1f.2 > f0b0-f0b7 : ahci > ffff-ffff : pnp 00:03 > ffff-ffff : pnp 00:03 > > 00000000-00000fff : reserved > 00001000-000917ff : System RAM > 00091800-0009ffff : reserved > 000a0000-000bffff : PCI Bus 0000:00 > 000c0000-000cedff : Video ROM > 000cf000-000d97ff : Adapter ROM > 000d9800-000da7ff : Adapter ROM > 000dc000-000dffff : PCI Bus 0000:00 > 000e0000-000fffff : reserved > 000e0000-000e3fff : PCI Bus 0000:00 > 000e4000-000e7fff : PCI Bus 0000:00 > 000f0000-000fffff : System ROM > 00100000-1fffffff : System RAM > 01000000-016fae8a : Kernel code > 016fae8b-01d008bf : Kernel data > 01e5a000-01fccfff : Kernel bss > 20000000-201fffff : reserved > 20000000-201fffff : pnp 00:0b > 20200000-40003fff : System RAM > 40004000-40004fff : reserved > 40004000-40004fff : pnp 00:0b > 40005000-d82c7fff : System RAM > d82c8000-d8d1cfff : reserved > d8d1d000-d8d2dfff : ACPI Tables > d8d2e000-d9bb7fff : ACPI Non-volatile Storage > d9bb8000-da582fff : reserved > da583000-da583fff : System RAM > da584000-da5c6fff : ACPI Non-volatile Storage > da5c7000-da9d7fff : System RAM > da9d8000-daff3fff : reserved > daff4000-daffffff : System RAM > db000000-db7fffff : RAM buffer > db800000-df9fffff : reserved > dfa00000-feafffff : PCI Bus 0000:00 > dfa00000-dfa00fff : pnp 00:0a > e0000000-efffffff : 0000:00:02.0 > f7800000-f7bfffff : 0000:00:02.0 > f7c00000-f7cfffff : PCI Bus 0000:09 > f7c00000-f7c3ffff : 0000:09:00.0 > f7c00000-f7c3ffff : alx > f7d00000-f7dfffff : PCI Bus 0000:07 > f7d00000-f7d01fff : 0000:07:00.0 > f7d00000-f7d01fff : iwlwifi > f7e00000-f7e0ffff : 0000:00:14.0 > f7e00000-f7e0ffff : xhci_hcd > f7e10000-f7e13fff : 0000:00:1b.0 > f7e10000-f7e13fff : ICH HD audio > f7e15000-f7e150ff : 0000:00:1f.3 > f7e16000-f7e167ff : 0000:00:1f.2 > f7e16000-f7e167ff : ahci > f7e17000-f7e173ff : 0000:00:1d.0 > f7e17000-f7e173ff : ehci_hcd > f7e18000-f7e183ff : 0000:00:1a.0 > f7e18000-f7e183ff : ehci_hcd > f7e1b000-f7e1b00f : 0000:00:16.0 > f7e1b000-f7e1b00f : mei_me > f8000000-fbffffff : PCI MMCONFIG 0000 [bus 00-3f] > f8000000-fbffffff : reserved > f8000000-fbffffff : pnp 00:0a > fe800000-fe802fff : pnp 00:07 > fec00000-fec00fff : reserved > fec00000-fec003ff : IOAPIC 0 > fed00000-fed03fff : reserved > fed00000-fed003ff : HPET 0 > fed10000-fed17fff : pnp 00:0a > fed18000-fed18fff : pnp 00:0a > fed19000-fed19fff : pnp 00:0a > fed1c000-fed1ffff : reserved > fed1c000-fed1ffff : pnp 00:0a > fed1f410-fed1f414 : iTCO_wdt > fed20000-fed3ffff : pnp 00:0a > fed45000-fed8ffff : pnp 00:0a > fed90000-fed93fff : pnp 00:0a > fee00000-fee00fff : Local APIC > fee00000-fee00fff : reserved > ff000000-ffffffff : reserved > ff000000-ffffffff : pnp 00:0a > 100000000-11f5fffff : System RAM > 11f600000-11fffffff : RAM buffer > > [8.5.] PCI information ('lspci -vvv' as root) > 00:00.0 Host bridge: Intel Corporation 3rd Gen Core processor DRAM > Controller (rev 09) > Subsystem: Dell Device 057e > Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- > Stepping- SERR- FastB2B- DisINTx- > Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- SERR- Latency: 0 > Capabilities: [e0] Vendor Specific Information: Len=0c > > 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor > Graphics Controller (rev 09) (prog-if 00 [VGA controller]) > Subsystem: Dell Device 057e > Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- > Stepping- SERR- FastB2B- DisINTx+ > Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- SERR- Latency: 0 > Interrupt: pin A routed to IRQ 45 > Region 0: Memory at f7800000 (64-bit, non-prefetchable) [size=4M] > Region 2: Memory at e0000000 (64-bit, prefetchable) [size=256M] > Region 4: I/O ports at f000 [size=64] > Expansion ROM at [disabled] > Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit- > Address: fee0f00c Data: 41e1 > Capabilities: [d0] Power Management version 2 > Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) > Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- > Capabilities: [a4] PCI Advanced Features > AFCap: TP+ FLR+ > AFCtrl: FLR- > AFStatus: TP- > Kernel driver in use: i915 > > 00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset > Family USB xHCI Host Controller (rev 04) (prog-if 30 [XHCI]) > Subsystem: Dell Device 057e > Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- > Stepping- SERR- FastB2B- DisINTx+ > Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- SERR- Latency: 0 > Interrupt: pin A routed to IRQ 40 > Region 0: Memory at f7e00000 (64-bit, non-prefetchable) [size=64K] > Capabilities: [70] Power Management version 2 > Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0-,D1-,D2-,D3hot+,D3cold+) > Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME- > Capabilities: [80] MSI: Enable+ Count=1/8 Maskable- 64bit+ > Address: 00000000fee0f00c Data: 4181 > Kernel driver in use: xhci_hcd > > 00:16.0 Communication controller: Intel Corporation 7 Series/C210 Series > Chipset Family MEI Controller #1 (rev 04) > Subsystem: Dell Device 057e > Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- > Stepping- SERR- FastB2B- DisINTx+ > Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- SERR- Latency: 0 > Interrupt: pin A routed to IRQ 42 > Region 0: Memory at f7e1b000 (64-bit, non-prefetchable) [size=16] > Capabilities: [50] Power Management version 3 > Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+) > Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME- > Capabilities: [8c] MSI: Enable+ Count=1/1 Maskable- 64bit+ > Address: 00000000fee0f00c Data: 41a1 > Kernel driver in use: mei_me > > 00:1a.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset > Family USB Enhanced Host Controller #2 (rev 04) (prog-if 20 [EHCI]) > Subsystem: Dell Device 057e > Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- > Stepping- SERR- FastB2B- DisINTx- > Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- SERR- Latency: 0 > Interrupt: pin A routed to IRQ 16 > Region 0: Memory at f7e18000 (32-bit, non-prefetchable) [size=1K] > Capabilities: [50] Power Management version 2 > Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0+,D1-,D2-,D3hot+,D3cold+) > Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- > Capabilities: [58] Debug port: BAR=1 offset=00a0 > Capabilities: [98] PCI Advanced Features > AFCap: TP+ FLR+ > AFCtrl: FLR- > AFStatus: TP- > Kernel driver in use: ehci-pci > > 00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family > High Definition Audio Controller (rev 04) > Subsystem: Dell Device 057e > Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- > Stepping- SERR- FastB2B- DisINTx+ > Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- SERR- Latency: 0, Cache Line Size: 64 bytes > Interrupt: pin A routed to IRQ 44 > Region 0: Memory at f7e10000 (64-bit, non-prefetchable) [size=16K] > Capabilities: [50] Power Management version 2 > Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA PME(D0+,D1-,D2-,D3hot+,D3cold+) > Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- > Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+ > Address: 00000000fee0f00c Data: 41d1 > Capabilities: [70] Express (v1) Root Complex Integrated Endpoint, MSI 00 > DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us > ExtTag- RBE- FLReset+ > DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported- > RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop- > MaxPayload 128 bytes, MaxReadReq 128 bytes > DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend- > LnkCap: Port #0, Speed unknown, Width x0, ASPM unknown, Latency L0 <64ns, L1 > <1us > ClockPM- Surprise- LLActRep- BwNot- > LnkCtl: ASPM Disabled; Disabled- Retrain- CommClk- > ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- > LnkSta: Speed unknown, Width x0, TrErr- Train- SlotClk- DLActive- BWMgmt- > ABWMgmt- > Capabilities: [100 v1] Virtual Channel > Caps: LPEVC=0 RefClk=100ns PATEntryBits=1 > Arb: Fixed- WRR32- WRR64- WRR128- > Ctrl: ArbSelect=Fixed > Status: InProgress- > VC0: Caps: PATOffset=00 MaxTimeSlots=1 RejSnoopTrans- > Arb: Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256- > Ctrl: Enable+ ID=0 ArbSelect=Fixed TC/VC=01 > Status: NegoPending- InProgress- > VC1: Caps: PATOffset=00 MaxTimeSlots=1 RejSnoopTrans- > Arb: Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256- > Ctrl: Enable+ ID=1 ArbSelect=Fixed TC/VC=22 > Status: NegoPending- InProgress- > Capabilities: [130 v1] Root Complex Link > Desc: PortNumber=0f ComponentID=00 EltType=Config > Link0: Desc: TargetPort=00 TargetComponent=00 AssocRCRB- LinkType=MemMapped > LinkValid+ > Addr: 00000000fed1c000 > Kernel driver in use: snd_hda_intel > > 00:1c.0 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family > PCI Express Root Port 1 (rev c4) (prog-if 00 [Normal decode]) > Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- > Stepping- SERR- FastB2B- DisINTx- > Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- SERR- Latency: 0, Cache Line Size: 64 bytes > Bus: primary=00, secondary=04, subordinate=04, sec-latency=0 > I/O behind bridge: 0000f000-00000fff > Memory behind bridge: fff00000-000fffff > Prefetchable memory behind bridge: 00000000fff00000-00000000000fffff > Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B- > PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn- > Capabilities: [40] Express (v2) Root Port (Slot+), MSI 00 > DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us > ExtTag- RBE+ FLReset- > DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported- > RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop- > MaxPayload 128 bytes, MaxReadReq 128 bytes > DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend- > LnkCap: Port #1, Speed 5GT/s, Width x1, ASPM L0s L1, Latency L0 <1us, L1 > <16us > ClockPM- Surprise- LLActRep+ BwNot- > LnkCtl: ASPM L1 Enabled; RCB 64 bytes Disabled- Retrain- CommClk- > ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- > LnkSta: Speed 2.5GT/s, Width x0, TrErr- Train- SlotClk+ DLActive- BWMgmt- > ABWMgmt- > SltCap: AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug- Surprise- > Slot #0, PowerLimit 10.000W; Interlock- NoCompl+ > SltCtl: Enable: AttnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq- LinkChg- > Control: AttnInd Unknown, PwrInd Unknown, Power- Interlock- > SltSta: Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet- Interlock- > Changed: MRL- PresDet- LinkState- > RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna- CRSVisible- > RootCap: CRSVisible- > RootSta: PME ReqID 0000, PMEStatus- PMEPending- > DevCap2: Completion Timeout: Range BC, TimeoutDis+ ARIFwd- > DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- ARIFwd- > LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-, Selectable > De-emphasis: -6dB > Transmit Margin: Normal Operating Range, EnterModifiedCompliance- > ComplianceSOS- > Compliance De-emphasis: -6dB > LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete-, > EqualizationPhase1- > EqualizationPhase2-, EqualizationPhase3-, LinkEqualizationRequest- > Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit- > Address: 00000000 Data: 0000 > Capabilities: [90] Subsystem: Dell Device 057e > Capabilities: [a0] Power Management version 2 > Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+) > Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- > Kernel driver in use: pcieport > > 00:1c.3 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family > PCI Express Root Port 4 (rev c4) (prog-if 00 [Normal decode]) > Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- > Stepping- SERR- FastB2B- DisINTx- > Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- SERR- Latency: 0, Cache Line Size: 64 bytes > Bus: primary=00, secondary=07, subordinate=07, sec-latency=0 > I/O behind bridge: 0000f000-00000fff > Memory behind bridge: f7d00000-f7dfffff > Prefetchable memory behind bridge: 00000000fff00000-00000000000fffff > Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B- > PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn- > Capabilities: [40] Express (v2) Root Port (Slot+), MSI 00 > DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us > ExtTag- RBE+ FLReset- > DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported- > RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop- > MaxPayload 128 bytes, MaxReadReq 128 bytes > DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend- > LnkCap: Port #4, Speed 5GT/s, Width x1, ASPM L0s L1, Latency L0 <512ns, L1 > <16us > ClockPM- Surprise- LLActRep+ BwNot- > LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+ > ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- > LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive+ BWMgmt+ > ABWMgmt- > SltCap: AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug- Surprise- > Slot #3, PowerLimit 10.000W; Interlock- NoCompl+ > SltCtl: Enable: AttnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq- LinkChg- > Control: AttnInd Unknown, PwrInd Unknown, Power- Interlock- > SltSta: Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet+ Interlock- > Changed: MRL- PresDet- LinkState- > RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna- CRSVisible- > RootCap: CRSVisible- > RootSta: PME ReqID 0000, PMEStatus- PMEPending- > DevCap2: Completion Timeout: Range BC, TimeoutDis+ ARIFwd- > DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- ARIFwd- > LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-, Selectable > De-emphasis: -6dB > Transmit Margin: Normal Operating Range, EnterModifiedCompliance- > ComplianceSOS- > Compliance De-emphasis: -6dB > LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete-, > EqualizationPhase1- > EqualizationPhase2-, EqualizationPhase3-, LinkEqualizationRequest- > Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit- > Address: 00000000 Data: 0000 > Capabilities: [90] Subsystem: Dell Device 057e > Capabilities: [a0] Power Management version 2 > Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+) > Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- > Kernel driver in use: pcieport > > 00:1c.5 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family > PCI Express Root Port 6 (rev c4) (prog-if 00 [Normal decode]) > Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- > Stepping- SERR- FastB2B- DisINTx- > Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- SERR- Latency: 0, Cache Line Size: 64 bytes > Bus: primary=00, secondary=09, subordinate=09, sec-latency=0 > I/O behind bridge: 0000e000-0000efff > Memory behind bridge: f7c00000-f7cfffff > Prefetchable memory behind bridge: 00000000fff00000-00000000000fffff > Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- BridgeCtl: Parity- SERR- NoISA- VGA- MAbort- >Reset- FastB2B- > PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn- > Capabilities: [40] Express (v2) Root Port (Slot+), MSI 00 > DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us > ExtTag- RBE+ FLReset- > DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported- > RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop- > MaxPayload 128 bytes, MaxReadReq 128 bytes > DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend- > LnkCap: Port #6, Speed 5GT/s, Width x1, ASPM L0s L1, Latency L0 <512ns, L1 > <16us > ClockPM- Surprise- LLActRep+ BwNot- > LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+ > ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- > LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive+ BWMgmt+ > ABWMgmt- > SltCap: AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug- Surprise- > Slot #5, PowerLimit 10.000W; Interlock- NoCompl+ > SltCtl: Enable: AttnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq- LinkChg- > Control: AttnInd Unknown, PwrInd Unknown, Power- Interlock- > SltSta: Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet+ Interlock- > Changed: MRL- PresDet- LinkState- > RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna- CRSVisible- > RootCap: CRSVisible- > RootSta: PME ReqID 0000, PMEStatus- PMEPending- > DevCap2: Completion Timeout: Range BC, TimeoutDis+ ARIFwd- > DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- ARIFwd- > LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis-, Selectable > De-emphasis: -6dB > Transmit Margin: Normal Operating Range, EnterModifiedCompliance- > ComplianceSOS- > Compliance De-emphasis: -6dB > LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete-, > EqualizationPhase1- > EqualizationPhase2-, EqualizationPhase3-, LinkEqualizationRequest- > Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit- > Address: 00000000 Data: 0000 > Capabilities: [90] Subsystem: Dell Device 057e > Capabilities: [a0] Power Management version 2 > Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+) > Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- > Kernel driver in use: pcieport > > 00:1d.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset > Family USB Enhanced Host Controller #1 (rev 04) (prog-if 20 [EHCI]) > Subsystem: Dell Device 057e > Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- > Stepping- SERR- FastB2B- DisINTx- > Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- SERR- Latency: 0 > Interrupt: pin A routed to IRQ 23 > Region 0: Memory at f7e17000 (32-bit, non-prefetchable) [size=1K] > Capabilities: [50] Power Management version 2 > Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0+,D1-,D2-,D3hot+,D3cold+) > Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- > Capabilities: [58] Debug port: BAR=1 offset=00a0 > Capabilities: [98] PCI Advanced Features > AFCap: TP+ FLR+ > AFCtrl: FLR- > AFStatus: TP- > Kernel driver in use: ehci-pci > > 00:1f.0 ISA bridge: Intel Corporation HM77 Express Chipset LPC Controller > (rev 04) > Subsystem: Dell Device 057e > Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- > Stepping- SERR- FastB2B- DisINTx- > Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- SERR- Latency: 0 > Capabilities: [e0] Vendor Specific Information: Len=0c > Kernel driver in use: lpc_ich > > 00:1f.2 RAID bus controller: Intel Corporation 82801 Mobile SATA Controller > [RAID mode] (rev 04) > Subsystem: Dell Device 057e > Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- > Stepping- SERR- FastB2B- DisINTx+ > Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- SERR- Latency: 0 > Interrupt: pin B routed to IRQ 41 > Region 0: I/O ports at f0b0 [size=8] > Region 1: I/O ports at f0a0 [size=4] > Region 2: I/O ports at f090 [size=8] > Region 3: I/O ports at f080 [size=4] > Region 4: I/O ports at f060 [size=32] > Region 5: Memory at f7e16000 (32-bit, non-prefetchable) [size=2K] > Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit- > Address: fee0500c Data: 4191 > Capabilities: [70] Power Management version 3 > Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot+,D3cold-) > Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME- > Capabilities: [a8] SATA HBA v1.0 BAR4 Offset=00000004 > Capabilities: [b0] PCI Advanced Features > AFCap: TP+ FLR+ > AFCtrl: FLR- > AFStatus: TP- > Kernel driver in use: ahci > > 00:1f.3 SMBus: Intel Corporation 7 Series/C210 Series Chipset Family SMBus > Controller (rev 04) > Subsystem: Dell Device 057e > Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- > Stepping- SERR- FastB2B- DisINTx- > Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- SERR- Interrupt: pin C routed to IRQ 11 > Region 0: Memory at f7e15000 (64-bit, non-prefetchable) [size=256] > Region 4: I/O ports at f040 [size=32] > > 07:00.0 Network controller: Intel Corporation Centrino Wireless-N 2230 (rev > c4) > Subsystem: Intel Corporation Centrino Wireless-N 2230 BGN > Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- > Stepping- SERR- FastB2B- DisINTx+ > Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- SERR- Latency: 0, Cache Line Size: 64 bytes > Interrupt: pin A routed to IRQ 43 > Region 0: Memory at f7d00000 (64-bit, non-prefetchable) [size=8K] > Capabilities: [c8] Power Management version 3 > Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+) > Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- > Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+ > Address: 00000000fee0400c Data: 41b1 > Capabilities: [e0] Express (v1) Endpoint, MSI 00 > DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <512ns, L1 unlimited > ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset+ > DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported- > RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop+ FLReset- > MaxPayload 128 bytes, MaxReadReq 128 bytes > DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend- > LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency L0 <4us, L1 > <32us > ClockPM+ Surprise- LLActRep- BwNot- > LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+ > ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- > LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- > ABWMgmt- > Capabilities: [100 v1] Advanced Error Reporting > UESta: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- > ECRC- UnsupReq- ACSViol- > UEMsk: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- > ECRC- UnsupReq- ACSViol- > UESvrt: DLP+ SDES- TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ MalfTLP+ > ECRC- UnsupReq- ACSViol- > CESta: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr- > CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+ > AERCap: First Error Pointer: 00, GenCap- CGenEn- ChkCap- ChkEn- > Capabilities: [140 v1] Device Serial Number 60-36-dd-ff-ff-32-f8-6b > Kernel driver in use: iwlwifi > > 09:00.0 Ethernet controller: Qualcomm Atheros AR8162 Fast Ethernet (rev 10) > Subsystem: Dell Device 057e > Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- > Stepping- SERR- FastB2B- DisINTx- > Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- SERR- Latency: 0, Cache Line Size: 64 bytes > Interrupt: pin A routed to IRQ 46 > Region 0: Memory at f7c00000 (64-bit, non-prefetchable) [size=256K] > Region 2: I/O ports at e000 [size=128] > Capabilities: [40] Power Management version 3 > Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0+,D1+,D2+,D3hot+,D3cold+) > Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME- > Capabilities: [58] Express (v1) Endpoint, MSI 00 > DevCap: MaxPayload 4096 bytes, PhantFunc 0, Latency L0s unlimited, L1 > unlimited > ExtTag- AttnBtn+ AttnInd+ PwrInd+ RBE+ FLReset- > DevCtl: Report errors: Correctable+ Non-Fatal+ Fatal+ Unsupported+ > RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop- > MaxPayload 128 bytes, MaxReadReq 512 bytes > DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend- > LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency L0 unlimited, > L1 unlimited > ClockPM+ Surprise- LLActRep- BwNot- > LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+ > ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- > LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- > ABWMgmt- > Capabilities: [c0] MSI: Enable+ Count=1/16 Maskable+ 64bit+ > Address: 00000000fee0f00c Data: 4122 > Masking: 0000fffe Pending: 00000000 > Capabilities: [d8] MSI-X: Enable- Count=16 Masked- > Vector table: BAR=0 offset=00002000 > PBA: BAR=0 offset=00003000 > Capabilities: [100 v1] Advanced Error Reporting > UESta: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- > ECRC- UnsupReq- ACSViol- > UEMsk: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- > ECRC- UnsupReq- ACSViol- > UESvrt: DLP- SDES+ TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ MalfTLP+ > ECRC- UnsupReq- ACSViol- > CESta: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr- > CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+ > AERCap: First Error Pointer: 00, GenCap+ CGenEn- ChkCap+ ChkEn- > Capabilities: [180 v1] Device Serial Number ff-ba-e6-31-78-45-c4-ff > Kernel driver in use: alx > > [8.6.] SCSI information (from /proc/scsi/scsi) > Attached devices: > Host: scsi0 Channel: 00 Id: 00 Lun: 00 > Vendor: ATA Model: ST500LT012-9WS14 Rev: 0001 > Type: Direct-Access ANSI SCSI revision: 05 > Host: scsi1 Channel: 00 Id: 00 Lun: 00 > Vendor: ATA Model: Micron C400 Real Rev: 01MG > Type: Direct-Access ANSI SCSI revision: 05 > Host: scsi4 Channel: 00 Id: 00 Lun: 00 > Vendor: HL-DT-ST Model: DVD+-RW GU70N Rev: A102 > Type: CD-ROM ANSI SCSI revision: 05 > Host: scsi6 Channel: 00 Id: 00 Lun: 00 > Vendor: Generic- Model: xD/SD/M.S. Rev: 1.00 > Type: Direct-Access ANSI SCSI revision: 02 > > [8.7.] Other information that might be relevant to the problem > (please look in /proc and include all information that you > think to be relevant): > N/A > > [X.] Other notes, patches, fixes, workarounds: > > The following one-line patch to 3.11-rc2 seems to make the problem go away: > > diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c > index bb456f4..b2e659c 100644 > --- a/kernel/sched/fair.c > +++ b/kernel/sched/fair.c > @@ -1531,6 +1531,7 @@ static void update_cfs_rq_blocked_load(struct cfs_rq > *cfs_rq, int force_update) > } > > __update_cfs_rq_tg_load_contrib(cfs_rq, force_update); > + update_cfs_shares(cfs_rq); > } > > static inline void update_rq_runnable_avg(struct rq *rq, int runnable) > > > > > > Peter replied: > Hi Max, > > Thanks for this elaborate bug report; I wish all of them were as > thorough. However, is there a reason you omitted CC'ing LKML? > > diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c > > index bb456f4..b2e659c 100644 > > --- a/kernel/sched/fair.c > > +++ b/kernel/sched/fair.c > > @@ -1531,6 +1531,7 @@ static void update_cfs_rq_blocked_load(struct cfs_rq *cfs_rq, int force_update) > > } > > > > __update_cfs_rq_tg_load_contrib(cfs_rq, force_update); > > + update_cfs_shares(cfs_rq); > > } > > > > static inline void update_rq_runnable_avg(struct rq *rq, int runnable) > > Ah I see what's happening. Currently we only call update_cfs_shares() > from the enqueue/dequeue paths. However since your tasks never sleep and > cannot migrate they never pass this code. This in turns means that the > inter-cgroup relations (the shares) don't get updated. > > I think your patch would indeed be a correct minimal fix in that it adds > a share update to the regular tick path ensuring it gets done even in > the absence of enqueues/dequeues. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/