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Message-ID: <50EACAEF.8010004@fold.natur.cuni.cz>
Date: Mon, 07 Jan 2013 14:17:35 +0100
From: Martin Mokrejs <mmokrejs@...d.natur.cuni.cz>
To: Hillf Danton <dhillf@...il.com>
CC: Martin Mokrejs <mmokrejs@...d.natur.cuni.cz>,
LKML <linux-kernel@...r.kernel.org>,
"linux-mm@...ck.org" <linux-mm@...ck.org>,
Greg KH <gregkh@...uxfoundation.org>, Tejun Heo <tj@...nel.org>
Subject: Re: linux-3.7.1: OOPS in page_lock_anon_vma
Hi Hilf,
thank you for your answer on this albeit I am not sure I understood your point well.
Hillf Danton wrote:
> Hello Martin
>
> On Mon, Jan 7, 2013 at 6:59 AM, Martin Mokrejs
> <mmokrejs@...d.natur.cuni.cz> wrote:
>> time to time. With ondemand governor I had cores in C7 for 50-70% of the time, that was
>> a bit better with performance governor but having the two hyperthreaded cores disabled
>> reduced the context switches by half, rescheduling interrupts went down by several orders
>> of magnitute. So it is crunching at max turbo speed on both cores, temp about 80 oC.
>>
> Your boxen could be used to cook pizza, and check the
> recommended working temperature in the manual please.
I meant CPU temperature, not environment temperature. ;-) This is a laptop dual core i7.
# dmesg | grep -i temp
[ 2.233856] coretemp coretemp.0: TjMax is 100 degrees C
[ 2.233882] coretemp coretemp.0: TjMax is 100 degrees C
#
I am a bit worried whether I disabled the 2 hyperthreaded cores (cpu2 and cpu3).
Per the stats below it like inadverently disabled the second core and its hyperthreaded
sibling? Or why are the counters not updated for CPU1 below?
# cat /proc/interrupts
CPU0 CPU1
0: 30 0 IO-APIC-edge timer
1: 15 0 IO-APIC-edge i8042
8: 33 0 IO-APIC-edge rtc0
9: 2 0 IO-APIC-fasteoi acpi
12: 241 0 IO-APIC-edge i8042
16: 50 0 IO-APIC-fasteoi ehci_hcd:usb1
19: 464445 0 IO-APIC-fasteoi sata_sil24
23: 17324 0 IO-APIC-fasteoi ehci_hcd:usb2
40: 0 0 PCI-MSI-edge pciehp
41: 14 0 PCI-MSI-edge mei
42: 137666 0 PCI-MSI-edge ahci
43: 13901 0 PCI-MSI-edge eth0
44: 36022 0 PCI-MSI-edge xhci_hcd
45: 0 0 PCI-MSI-edge xhci_hcd
46: 0 0 PCI-MSI-edge xhci_hcd
47: 0 0 PCI-MSI-edge xhci_hcd
48: 0 0 PCI-MSI-edge xhci_hcd
49: 810 0 PCI-MSI-edge snd_hda_intel
50: 1 0 PCI-MSI-edge iwlwifi
51: 461 0 PCI-MSI-edge i915
NMI: 6496 6111 Non-maskable interrupts
LOC: 526765 521983 Local timer interrupts
SPU: 0 0 Spurious interrupts
PMI: 6496 6111 Performance monitoring interrupts
IWI: 0 0 IRQ work interrupts
RTR: 2 0 APIC ICR read retries
RES: 197262 220079 Rescheduling interrupts
CAL: 33 299572 Function call interrupts
TLB: 3302 19119 TLB shootdowns
TRM: 0 0 Thermal event interrupts
THR: 0 0 Threshold APIC interrupts
MCE: 0 0 Machine check exceptions
MCP: 20 20 Machine check polls
ERR: 0
MIS: 0
#
i7z reports at the moment:
Cpu speed from cpuinfo 2793.00Mhz
cpuinfo might be wrong if cpufreq is enabled. To guess correctly try estimating via tsc
Linux's inbuilt cpu_khz code emulated now
True Frequency (without accounting Turbo) 2793 MHz
CPU Multiplier 28x || Bus clock frequency (BCLK) 99.75 MHz
Socket [0] - [physical cores=2, logical cores=2, max online cores ever=2]
TURBO ENABLED on 2 Cores, Hyper Threading OFF
Max Frequency without considering Turbo 2892.75 MHz (99.75 x [29])
Max TURBO Multiplier (if Enabled) with 1/2/3/4 Cores is 35x/33x/33x/33x
Real Current Frequency 3291.75 MHz [99.75 x 33.00] (Max of below)
Core [core-id] :Actual Freq (Mult.) C0% Halt(C1)% C3 % C6 % C7 % Temp
Core 1 [0]: 3291.75 (33.00x) 100 0 0 0 0 87
Core 2 [1]: 3291.75 (33.00x) 100 0 0 0 0 81
# cat /proc/schedstat
version 15
timestamp 4295525245
cpu0 0 0 4348066 350860 2727228 2499580 4026361745866 2434254688153 3965236
domain0 3 25687 19018 2642 7492049 4293 7 0 19018 22219 21471 43 1338108 709 0 0 21471 342087 288140 40648 58479699 14067 33 5 288135 0 0 0 0 0 0 0 0 0 223256 24270 0
cpu1 0 0 4297136 324961 2565709 2361951 3810969849763 2437183692947 3941014
domain0 3 24296 17512 2837 7768706 4218 15 1 17511 22994 22053 48 1636623 896 0 0 22053 313125 260913 38828 58232101 14403 37 2 260911 0 0 0 0 0 0 0 0 0 198332 23230 0
# cat /proc/sched_debug
Sched Debug Version: v0.10, 3.7.1-default #24
ktime : 5888049.840626
sched_clk : 5878999.320221
cpu_clk : 5878999.320272
jiffies : 4295526100
sched_clock_stable : 1
sysctl_sched
.sysctl_sched_latency : 12.000000
.sysctl_sched_min_granularity : 1.500000
.sysctl_sched_wakeup_granularity : 2.000000
.sysctl_sched_child_runs_first : 1
.sysctl_sched_features : 12091
.sysctl_sched_tunable_scaling : 1 (logaritmic)
cpu#0, 2793.732 MHz
.nr_running : 3
.load : 3072
.nr_switches : 4323568
.nr_load_updates : 562036
.nr_uninterruptible : -84
.next_balance : 4295.526102
.curr->pid : 28277
.clock : 5878998.371153
.cpu_load[0] : 3072
.cpu_load[1] : 2307
.cpu_load[2] : 2310
.cpu_load[3] : 2504
.cpu_load[4] : 2655
.yld_count : 0
.sched_count : 4356498
.sched_goidle : 350860
.avg_idle : 510885
.ttwu_count : 2733994
.ttwu_local : 2506071
cfs_rq[0]:
.exec_clock : 4034453.882147
.MIN_vruntime : 2945931.837439
.min_vruntime : 2945931.837439
.max_vruntime : 2945931.846807
.spread : 0.009368
.spread0 : 0.000000
.nr_spread_over : 11
.nr_running : 3
.load : 3072
rt_rq[0]:
.rt_nr_running : 0
.rt_throttled : 0
.rt_time : 0.000000
.rt_runtime : 950.000000
runnable tasks:
task PID tree-key switches prio exec-runtime sum-exec sum-sleep
----------------------------------------------------------------------------------------------------------
bash 26153 2945931.846807 503 120 2945931.846807 67.290946 3357952.534597
cc1plus 28242 2945931.837439 174 120 2945931.837439 1007.286114 0.007842
R cat 28277 2945925.837439 1 120 2945925.837439 0.060401 0.041591
cpu#1, 2793.732 MHz
.nr_running : 3
.load : 3072
.nr_switches : 4269177
.nr_load_updates : 552548
.nr_uninterruptible : 74
.next_balance : 4295.526116
.curr->pid : 28269
.clock : 5878989.505170
.cpu_load[0] : 3072
.cpu_load[1] : 3008
.cpu_load[2] : 2748
.cpu_load[3] : 2472
.cpu_load[4] : 2288
.yld_count : 0
.sched_count : 4301337
.sched_goidle : 324961
.avg_idle : 1000000
.ttwu_count : 2567597
.ttwu_local : 2363707
cfs_rq[1]:
.exec_clock : 3819068.016461
.MIN_vruntime : 2745747.270205
.min_vruntime : 2745740.067182
.max_vruntime : 2745750.033571
.spread : 2.763366
.spread0 : -200191.770257
.nr_spread_over : 12
.nr_running : 3
.load : 3072
rt_rq[1]:
.rt_nr_running : 0
.rt_throttled : 0
.rt_time : 0.000000
.rt_runtime : 950.000000
runnable tasks:
task PID tree-key switches prio exec-runtime sum-exec sum-sleep
----------------------------------------------------------------------------------------------------------
cc1plus 28263 2745747.270205 59 120 2745747.270205 385.172420 0.006728
R cc1plus 28269 2745740.067182 35 120 2745740.067182 262.588883 0.000000
water 28276 2745750.033571 5 120 2745750.033571 30.718348 0.008321
#
Do you think the crash OOPs is related to me baking the processor? That a business for the BIOS
and these kernel drivers, right?
CONFIG_SENSORS_CORETEMP=y
CONFIG_SENSORS_LTC4215=m
CONFIG_SENSORS_ACPI_POWER=m
CONFIG_SENSORS_ATK0110=m
CONFIG_THERMAL=y
CONFIG_THERMAL_HWMON=y
CONFIG_WATCHDOG=y
CONFIG_WATCHDOG_CORE=y
CONFIG_ITCO_WDT=y
CONFIG_ITCO_VENDOR_SUPPORT=y
CPU0: Intel(R) Core(TM) i7-2640M CPU @ 2.80GHz (fam: 06, model: 2a, stepping: 07)
IN enabled some debug options in "Kernel hacking" related to mutexes, locks etc. and so far am running fine.
And the SLUB debug, of course. ;-)
Martin
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