On Wed, 27 April 2011 Bruno PrÃmont wrote:
> On Wed, 27 Apr 2011 00:28:37 +0200 (CEST) Thomas Gleixner wrote:
> > On Tue, 26 Apr 2011, Linus Torvalds wrote:
> > > On Tue, Apr 26, 2011 at 10:09 AM, Bruno PrÃmont wrote:
> > > >
> > > > Just in case, /proc/$(pidof rcu_kthread)/status shows ~20k voluntary
> > > > context switches and exactly one non-voluntary one.
> > > >
> > > > In addition when rcu_kthread has stopped doing its work
> > > > `swapoff $(swapdevice)` seems to block forever (at least normal shutdown
> > > > blocks on disabling swap device).
Apparently it's not swapoff but `umount -a -t tmpfs` that's getting
stuck here. Manual swapoff worked.
The stuck umount:
[ 1714.960735] umount D 5a000040 5668 20331 20324 0x00000000
[ 1714.960735] c3c99e5c 00000086 dd407900 5a000040 dd25a1a8 dd407900 dd25a120 c3c99e0c
[ 1714.960735] c3c99e24 c10c1be2 c14d9f20 c3c99e5c c3c8c680 c3c8c680 000000bb c3c99e24
[ 1714.960735] c10c0b88 dd25a120 dd407900 ddfd4b40 c3c99e4c ddfc9d20 dd402380 5a000010
[ 1714.960735] Call Trace:
[ 1714.960735] [<c10c1be2>] ? check_object+0x92/0x210
[ 1714.960735] [<c10c0b88>] ? init_object+0x38/0x70
[ 1714.960735] [<c10c1be2>] ? check_object+0x92/0x210
[ 1714.960735] [<c13cb37d>] schedule_timeout+0x16d/0x280
[ 1714.960735] [<c10c0b88>] ? init_object+0x38/0x70
[ 1714.960735] [<c10c2122>] ? free_debug_processing+0x112/0x1f0
[ 1714.960735] [<c10a3791>] ? shmem_put_super+0x11/0x20
[ 1714.960735] [<c13cae9c>] wait_for_common+0x9c/0x150
[ 1714.960735] [<c102c890>] ? try_to_wake_up+0x170/0x170
[ 1714.960735] [<c13caff2>] wait_for_completion+0x12/0x20
[ 1714.960735] [<c1075ad7>] rcu_barrier_sched+0x47/0x50
[ 1714.960735] [<c104d3c0>] ? alloc_pid+0x370/0x370
[ 1714.960735] [<c10ce74a>] deactivate_locked_super+0x3a/0x60
[ 1714.960735] [<c10ce948>] deactivate_super+0x48/0x70
[ 1714.960735] [<c10e7427>] mntput_no_expire+0x87/0xe0
[ 1714.960735] [<c10e7800>] sys_umount+0x60/0x320
[ 1714.960735] [<c10b231a>] ? remove_vma+0x3a/0x50
[ 1714.960735] [<c10b3b22>] ? do_munmap+0x212/0x2f0
[ 1714.960735] [<c10e7ad9>] sys_oldumount+0x19/0x20
[ 1714.960735] [<c13cce10>] sysenter_do_call+0x12/0x26
which looks like lock conflict with RCU:
[ 1714.960735] rcu_kthread R running 6924 6 2 0x00000000
[ 1714.960735] dd473f28 00000046 5a000240 dbd6ba7c dd407360 ddfaf840 dbd6b740 dd473ed8
[ 1714.960735] ddfaee00 dd407a20 5a000000 dd473f28 dd445040 dd445040 0000009c dd473f0c
[ 1714.960735] c10c1be2 c14d9f20 dbf7057c 0000005a 000000bb 000000bb dd473f0c c10c0b88
[ 1714.960735] Call Trace:
[ 1714.960735] [<c10c1be2>] ? check_object+0x92/0x210
[ 1714.960735] [<c10c0b88>] ? init_object+0x38/0x70
[ 1714.960735] [<c103fd8d>] ? lock_timer_base+0x2d/0x70
[ 1714.960735] [<c13cb347>] schedule_timeout+0x137/0x280
[ 1714.960735] [<c103fef0>] ? sys_gettid+0x20/0x20
[ 1714.960735] [<c13cb4e4>] schedule_timeout_interruptible+0x14/0x20
[ 1714.960735] [<c1075a70>] rcu_kthread+0xa0/0xc0
[ 1714.960735] [<c1050190>] ? wake_up_bit+0x70/0x70
[ 1714.960735] [<c10759d0>] ? rcu_process_callbacks+0x60/0x60
[ 1714.960735] [<c104fc04>] kthread+0x74/0x80
[ 1714.960735] [<c104fb90>] ? flush_kthread_worker+0x90/0x90
[ 1714.960735] [<c13cd336>] kernel_thread_helper+0x6/0xd
(I have rest of sysreq+t output available in case someone wants it)
> > > > If I get to do it when I get back home I will manually try to swapoff
> > > > and take process traces with sysrq-t.
> > >
> > > That "exactly one non-voluntary one" sounds like the smoking gun.
It's not the gun we're looking for as it's already smoking long before
any RCU-managed slabs start piling up (e.g. already when I get at a
shell after boot sequence).
Voluntary context switches stay constant from the time on SLABs pile up.
(which makes sense as it doesn't run get CPU slices anymore)
> > Can you please enable CONFIG_SCHED_DEBUG and provide the output of
> > /proc/sched_stat when the problem surfaces and a minute after the
> > first snapshot?
hm, did you mean CONFIG_SCHEDSTAT or /proc/sched_debug?
I did use CONFIG_SCHED_DEBUG (and there is no /proc/sched_stat) so I took
/proc/sched_debug which exists... (attached, taken about 7min and +1min
after SLABs started piling up), though build processes were SIGSTOPped
during first minute.
printk wrote (in case its timestamp is useful, more below):
[ 518.480103] sched: RT throttling activated
If my choice was the wrong one, please tell so I can generate the other
ones.
> > Also please apply the patch below and check, whether the printk shows
> > up in your dmesg.
>
> > Index: linux-2.6-tip/kernel/sched_rt.c
> > ===================================================================
> > --- linux-2.6-tip.orig/kernel/sched_rt.c
> > +++ linux-2.6-tip/kernel/sched_rt.c
> > @@ -609,6 +609,7 @@ static int sched_rt_runtime_exceeded(str
> >
> > if (rt_rq->rt_time > runtime) {
> > rt_rq->rt_throttled = 1;
> > + printk_once(KERN_WARNING "sched: RT throttling activated\n");
This gun is triggering right before RCU-managed slabs start piling up as
visible under slabtop so chances are it's at least a related!
Bruno
> > if (rt_rq_throttled(rt_rq)) {
> > sched_rt_rq_dequeue(rt_rq);
> > return 1;
Sched Debug Version: v0.10, 2.6.39-rc4-jupiter1-00187-g686c4cb-dirty #3
ktime : 905613.047984
sched_clk : 905964.436991
cpu_clk : 905613.047795
jiffies : 60561
sched_clock_stable : 0
sysctl_sched
.sysctl_sched_latency : 6.000000
.sysctl_sched_min_granularity : 0.750000
.sysctl_sched_wakeup_granularity : 1.000000
.sysctl_sched_child_runs_first : 0
.sysctl_sched_features : 7279
.sysctl_sched_tunable_scaling : 1 (logaritmic)
cpu#0, 1536.952 MHz
.nr_running : 3
.load : 1024
.nr_switches : 256821
.nr_load_updates : 34218
.nr_uninterruptible : 0
.next_balance : 0.000000
.curr->pid : 20302
.clock : 905610.184134
.cpu_load[0] : 1024
.cpu_load[1] : 512
.cpu_load[2] : 256
.cpu_load[3] : 128
.cpu_load[4] : 64
cfs_rq[0]:/autogroup-31
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 32.428483
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250290.624883
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 48651.034996
.se->vruntime : 11386.544607
.se->sum_exec_runtime : 33.477059
.se->load.weight : 1024
cfs_rq[0]:/autogroup-30
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 4.750914
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250318.302452
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 48650.930709
.se->vruntime : 11383.513621
.se->sum_exec_runtime : 5.799490
.se->load.weight : 1024
cfs_rq[0]:/autogroup-29
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 1.259565
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250321.793801
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 47345.196993
.se->vruntime : 11143.631354
.se->sum_exec_runtime : 2.308141
.se->load.weight : 1024
cfs_rq[0]:/autogroup-27
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 5.664943
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250317.388423
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 46773.145157
.se->vruntime : 10850.993742
.se->sum_exec_runtime : 6.713519
.se->load.weight : 1024
cfs_rq[0]:/autogroup-25
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 12.001858
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250311.051508
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 884979.311623
.se->vruntime : 250196.905043
.se->sum_exec_runtime : 13.050434
.se->load.weight : 1024
cfs_rq[0]:/autogroup-23
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 0.704941
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250322.348425
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 33068.602462
.se->vruntime : 10100.905811
.se->sum_exec_runtime : 1.753517
.se->load.weight : 1024
cfs_rq[0]:/autogroup-21
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 11731.456625
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -238591.596741
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 900349.982653
.se->vruntime : 250318.886477
.se->sum_exec_runtime : 4895.135656
.se->load.weight : 1024
cfs_rq[0]:/autogroup-19
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 47.286940
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250275.766426
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 900927.938404
.se->vruntime : 250315.931378
.se->sum_exec_runtime : 48.335516
.se->load.weight : 1024
cfs_rq[0]:/autogroup-17
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 357.298120
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -249965.755246
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 650398.332497
.se->vruntime : 248631.217388
.se->sum_exec_runtime : 358.346696
.se->load.weight : 1024
cfs_rq[0]:/autogroup-16
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 8.865868
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250314.187498
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 23672.153504
.se->vruntime : 9597.142868
.se->sum_exec_runtime : 4.501025
.se->load.weight : 1024
cfs_rq[0]:/autogroup-14
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 0.379704
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250323.433070
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 24113.709183
.se->vruntime : 9701.835305
.se->sum_exec_runtime : 0.668872
.se->load.weight : 1024
cfs_rq[0]:/autogroup-13
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 899.191622
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -249423.861744
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 900715.342667
.se->vruntime : 250318.391635
.se->sum_exec_runtime : 896.780102
.se->load.weight : 1024
cfs_rq[0]:/autogroup-12
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 7881.771616
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -242441.281750
.nr_spread_over : 0
.nr_running : 1
.load : 1024
.se->exec_start : 901282.397156
.se->vruntime : 250323.053366
.se->sum_exec_runtime : 7886.452282
.se->load.weight : 1024
cfs_rq[0]:/autogroup-11
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 327444.606138
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : 77121.552772
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 590827.086481
.se->vruntime : 246807.766077
.se->sum_exec_runtime : 227004.896350
.se->load.weight : 1024
cfs_rq[0]:/autogroup-9
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 4.901558
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250318.151808
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 16353.807059
.se->vruntime : 8798.213404
.se->sum_exec_runtime : 5.864229
.se->load.weight : 1024
cfs_rq[0]:/autogroup-8
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 5.092357
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250317.961009
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 16351.804335
.se->vruntime : 8798.060733
.se->sum_exec_runtime : 6.047419
.se->load.weight : 1024
cfs_rq[0]:/autogroup-4
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 194.043637
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250129.009729
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 214180.833484
.se->vruntime : 16973.019690
.se->sum_exec_runtime : 1179.311396
.se->load.weight : 1024
cfs_rq[0]:/autogroup-1
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 46.620704
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250276.432662
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 900942.773257
.se->vruntime : 250316.002285
.se->sum_exec_runtime : 49.120925
.se->load.weight : 1024
cfs_rq[0]:/
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 250323.053366
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : 0.000000
.nr_spread_over : 0
.nr_running : 1
.load : 1024
rt_rq[0]:
.rt_nr_running : 2
.rt_throttled : 1
.rt_time : 950.008387
.rt_runtime : 950.000000
runnable tasks:
task PID tree-key switches prio exec-runtime sum-exec sum-sleep
----------------------------------------------------------------------------------------------------------
rcu_kthread 6 0.000000 24701 98 0 0 0.000000 0.000000 0.000000 /
watchdog/0 7 0.000000 154 0 0 0 0.000000 0.000000 0.000000 /
R cat 20302 7884.303335 0 120 0 0 0.000000 0.000000 0.000000 /autogroup-12
Sched Debug Version: v0.10, 2.6.39-rc4-jupiter1-00187-g686c4cb-dirty #3
ktime : 965620.925133
sched_clk : 965968.533388
cpu_clk : 965620.925129
jiffies : 66562
sched_clock_stable : 0
sysctl_sched
.sysctl_sched_latency : 6.000000
.sysctl_sched_min_granularity : 0.750000
.sysctl_sched_wakeup_granularity : 1.000000
.sysctl_sched_child_runs_first : 0
.sysctl_sched_features : 7279
.sysctl_sched_tunable_scaling : 1 (logaritmic)
cpu#0, 1536.952 MHz
.nr_running : 4
.load : 2048
.nr_switches : 258178
.nr_load_updates : 34735
.nr_uninterruptible : 0
.next_balance : 0.000000
.curr->pid : 20304
.clock : 965620.017504
.cpu_load[0] : 2048
.cpu_load[1] : 1024
.cpu_load[2] : 512
.cpu_load[3] : 256
.cpu_load[4] : 129
cfs_rq[0]:/autogroup-31
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 32.428483
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250659.411324
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 48651.034996
.se->vruntime : 11386.544607
.se->sum_exec_runtime : 33.477059
.se->load.weight : 1024
cfs_rq[0]:/autogroup-30
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 4.750914
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250687.088893
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 48650.930709
.se->vruntime : 11383.513621
.se->sum_exec_runtime : 5.799490
.se->load.weight : 1024
cfs_rq[0]:/autogroup-29
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 1.259565
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250690.580242
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 47345.196993
.se->vruntime : 11143.631354
.se->sum_exec_runtime : 2.308141
.se->load.weight : 1024
cfs_rq[0]:/autogroup-27
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 5.664943
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250686.174864
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 46773.145157
.se->vruntime : 10850.993742
.se->sum_exec_runtime : 6.713519
.se->load.weight : 1024
cfs_rq[0]:/autogroup-25
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 12.062566
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250679.777241
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 944999.839634
.se->vruntime : 250569.218332
.se->sum_exec_runtime : 13.111142
.se->load.weight : 1024
cfs_rq[0]:/autogroup-23
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 0.704941
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250691.134866
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 33068.602462
.se->vruntime : 10100.905811
.se->sum_exec_runtime : 1.753517
.se->load.weight : 1024
cfs_rq[0]:/autogroup-21
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 12601.382211
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -238090.457596
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 960317.931144
.se->vruntime : 250691.825513
.se->sum_exec_runtime : 5246.772916
.se->load.weight : 1024
cfs_rq[0]:/autogroup-19
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 49.695928
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250642.143879
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 960895.765697
.se->vruntime : 250688.869265
.se->sum_exec_runtime : 50.744504
.se->load.weight : 1024
cfs_rq[0]:/autogroup-17
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 357.298120
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250334.541687
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 650398.332497
.se->vruntime : 248631.217388
.se->sum_exec_runtime : 358.346696
.se->load.weight : 1024
cfs_rq[0]:/autogroup-16
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 8.865868
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250682.973939
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 23672.153504
.se->vruntime : 9597.142868
.se->sum_exec_runtime : 4.501025
.se->load.weight : 1024
cfs_rq[0]:/autogroup-14
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 0.379704
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250692.219511
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 24113.709183
.se->vruntime : 9701.835305
.se->sum_exec_runtime : 0.668872
.se->load.weight : 1024
cfs_rq[0]:/autogroup-13
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 948.016263
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -249743.823544
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 960791.018110
.se->vruntime : 250691.430149
.se->sum_exec_runtime : 945.604743
.se->load.weight : 1024
cfs_rq[0]:/autogroup-12
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 7896.659461
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -242795.180346
.nr_spread_over : 0
.nr_running : 1
.load : 1024
.se->exec_start : 961260.183602
.se->vruntime : 250691.669201
.se->sum_exec_runtime : 7896.210852
.se->load.weight : 1024
cfs_rq[0]:/autogroup-11
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 327444.606138
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : 76752.766331
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 590827.086481
.se->vruntime : 246807.766077
.se->sum_exec_runtime : 227004.896350
.se->load.weight : 1024
cfs_rq[0]:/autogroup-9
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 4.901558
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250686.938249
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 16353.807059
.se->vruntime : 8798.213404
.se->sum_exec_runtime : 5.864229
.se->load.weight : 1024
cfs_rq[0]:/autogroup-8
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 5.092357
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250686.747450
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 16351.804335
.se->vruntime : 8798.060733
.se->sum_exec_runtime : 6.047419
.se->load.weight : 1024
cfs_rq[0]:/autogroup-4
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 194.043637
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250497.796170
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 214180.833484
.se->vruntime : 16973.019690
.se->sum_exec_runtime : 1179.311396
.se->load.weight : 1024
cfs_rq[0]:/autogroup-1
.exec_clock : 0.000000
.MIN_vruntime : 0.000001
.min_vruntime : 48.036315
.max_vruntime : 0.000001
.spread : 0.000000
.spread0 : -250643.803492
.nr_spread_over : 0
.nr_running : 0
.load : 0
.se->exec_start : 960971.811607
.se->vruntime : 250688.941814
.se->sum_exec_runtime : 50.536536
.se->load.weight : 1024
cfs_rq[0]:/
.exec_clock : 0.000000
.MIN_vruntime : 250691.839807
.min_vruntime : 250691.839807
.max_vruntime : 250691.839807
.spread : 0.000000
.spread0 : 0.000000
.nr_spread_over : 0
.nr_running : 2
.load : 2048
rt_rq[0]:
.rt_nr_running : 2
.rt_throttled : 1
.rt_time : 950.008387
.rt_runtime : 950.000000
runnable tasks:
task PID tree-key switches prio exec-runtime sum-exec sum-sleep
----------------------------------------------------------------------------------------------------------
rcu_kthread 6 0.000000 24701 98 0 0 0.000000 0.000000 0.000000 /
watchdog/0 7 0.000000 154 0 0 0 0.000000 0.000000 0.000000 /
R cat 20304 7896.659461 0 120 0 0 0.000000 0.000000 0.000000 /autogroup-12