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Date: Fri, 19 Aug 2016 17:29:16 +0300
From: Grygorii Strashko <grygorii.strashko@...com>
To: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
CC: Steven Rostedt <rostedt@...dmis.org>, <linux-omap@...r.kernel.org>,
Alison Chaiken <alison@...oton-tech.com>,
<linux-rt-users@...r.kernel.org>, <netdev@...r.kernel.org>
Subject: Re: [4.4-RT PATCH RFC/RFT] drivers: net: cpsw: mark rx/tx irq as
IRQF_NO_THREAD
On 08/12/2016 11:32 AM, Sebastian Andrzej Siewior wrote:
> On 2016-08-11 19:15:40 [+0300], Grygorii Strashko wrote:
>> Mark CPSW Rx/Tx IRQs as IRQF_NO_THREAD and avoid double scheduling on -RT
>> where this IRQs are forced threaded:
>> rx-irq
>> |- schedule threaded rx-irq handler
>> ...
>> |- threaded rx-irq handler -> cpsw_rx_interrupt()
>> |- napi_schedule()
>> |- __raise_softirq_irqoff()
>> |- wakeup_proper_softirq()
>> ...
>> napi
>
> This should not be the default path. The default should be napi running
> in the context of the threaded rx-irq handler once the handler is done.
> The wakeup_proper_softirq() part is only done if napi thinks that the
> callback functions runs for too long. So in *that* case you continue
> NAPI in the softirq-thread which runs at SCHED_OTHER.
>
>> after:
>> rx-irq
>> |- cpsw_rx_interrupt()
>> |- napi_schedule()
>> |- irq_exit()
>> |- invoke_softirq()
>> |- wakeup_softirqd()
>> ...
>> napi
>
> Since you schedule the softirq from an IRQ-off region / without a
> process context you force the softirq to run in the thread at
> SCHED_OTHER priority.
>
>> And, as result, get benefits from the following improvements (tested
>> on am57xx-evm):
>>
>> 1) "[ 78.348599] NOHZ: local_softirq_pending 80" message will not be
>> seen any more. Now these warnings can be seen once iperf is started.
>> # iperf -c $IPERFHOST -w 128K -d -t 60
>
> Do you also see "sched: RT throttling activated"? Because I don't see
> otherwise why this should pop up.
>
I've collected trace before first occurrence of "NOHZ: local_softirq_pending 80"
irq/354-4848400-85 [000] 90.639460: irq_handler_entry: irq=19 name=arch_timer
iperf-1284 [001] 90.639474: softirq_raise: vec=1 [action=TIMER]
iperf-1284 [001] 90.639486: irq_handler_exit: irq=19 ret=handled
irq/354-4848400-85 [000] 90.639488: softirq_raise: vec=7 [action=SCHED]
iperf-1284 [001] 90.639490: sched_waking: comm=ksoftirqd/1 pid=21 prio=120 target_cpu=001
irq/354-4848400-85 [000] 90.639492: softirq_raise: vec=1 [action=TIMER]
iperf-1284 [001] 90.639499: sched_wakeup: ksoftirqd/1:21 [120] success=1 CPU:001
iperf-1284 [001] 90.639504: sched_waking: comm=ktimersoftd/1 pid=20 prio=98 target_cpu=001
irq/354-4848400-85 [000] 90.639505: irq_handler_exit: irq=19 ret=handled
iperf-1284 [001] 90.639512: sched_wakeup: ktimersoftd/1:20 [98] success=1 CPU:001
iperf-1284 [001] 90.639526: sched_stat_runtime: comm=iperf pid=1284 runtime=50752 [ns] vruntime=2105322850 [ns]
iperf-1284 [001] 90.639537: sched_switch: iperf:1284 [120] R ==> irq/355-4848400:86 [49]
irq/355-4848400-86 [001] 90.639545: softirq_raise: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.639556: softirq_entry: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.639589: softirq_exit: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.639614: sched_switch: irq/355-4848400:86 [49] S ==> ktimersoftd/1:20 [98]
ktimersoftd/1-20 [001] 90.639625: softirq_entry: vec=1 [action=TIMER]
ktimersoftd/1-20 [001] 90.639637: sched_waking: comm=rcu_preempt pid=8 prio=98 target_cpu=001
ktimersoftd/1-20 [001] 90.639646: sched_wakeup: rcu_preempt:8 [98] success=1 CPU:001
ktimersoftd/1-20 [001] 90.639663: softirq_exit: vec=1 [action=TIMER]
ktimersoftd/1-20 [001] 90.639679: sched_switch: ktimersoftd/1:20 [98] S ==> rcu_preempt:8 [98]
rcu_preempt-8 [001] 90.639722: sched_switch: rcu_preempt:8 [98] S ==> ksoftirqd/1:21 [120]
ksoftirqd/1-21 [001] 90.639740: sched_stat_runtime: comm=ksoftirqd/1 pid=21 runtime=25539 [ns] vruntime=29960463828 [ns]
ksoftirqd/1-21 [001] 90.639750: sched_switch: ksoftirqd/1:21 [120] S ==> iperf:1284 [120]
irq/354-4848400-85 [000] 90.639878: irq_handler_entry: irq=355 name=48484000.ethernet
irq/354-4848400-85 [000] 90.639880: irq_handler_exit: irq=355 ret=handled
irq/354-4848400-85 [000] 90.639884: sched_waking: comm=irq/355-4848400 pid=86 prio=49 target_cpu=001
irq/354-4848400-85 [000] 90.639896: sched_wakeup: irq/355-4848400:86 [49] success=1 CPU:001
iperf-1284 [001] 90.639903: sched_stat_runtime: comm=iperf pid=1284 runtime=150466 [ns] vruntime=2105473316 [ns]
iperf-1284 [001] 90.639913: sched_switch: iperf:1284 [120] R ==> irq/355-4848400:86 [49]
irq/355-4848400-86 [001] 90.639921: softirq_raise: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.639932: softirq_entry: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.639958: sched_waking: comm=irq/354-4848400 pid=85 prio=49 target_cpu=000
irq/355-4848400-86 [001] 90.639963: sched_wakeup: irq/354-4848400:85 [49] success=1 CPU:000
irq/355-4848400-86 [001] 90.639984: softirq_exit: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.640012: sched_switch: irq/355-4848400:86 [49] S ==> iperf:1284 [120]
irq/354-4848400-85 [000] 90.640109: sched_waking: comm=iperf pid=1284 prio=120 target_cpu=001
irq/354-4848400-85 [000] 90.640115: sched_wakeup: iperf:1284 [120] success=1 CPU:001
irq/354-4848400-85 [000] 90.640152: irq_handler_entry: irq=355 name=48484000.ethernet
irq/354-4848400-85 [000] 90.640154: irq_handler_exit: irq=355 ret=handled
irq/354-4848400-85 [000] 90.640158: sched_waking: comm=irq/355-4848400 pid=86 prio=49 target_cpu=001
irq/354-4848400-85 [000] 90.640170: sched_wakeup: irq/355-4848400:86 [49] success=1 CPU:001
iperf-1284 [001] 90.640177: sched_stat_runtime: comm=iperf pid=1284 runtime=163480 [ns] vruntime=2105636796 [ns]
iperf-1284 [001] 90.640187: sched_switch: iperf:1284 [120] R ==> irq/355-4848400:86 [49]
irq/355-4848400-86 [001] 90.640195: softirq_raise: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.640206: softirq_entry: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.640239: softirq_exit: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.640266: sched_switch: irq/355-4848400:86 [49] S ==> iperf:1284 [120]
irq/354-4848400-85 [000] 90.640376: irq_handler_entry: irq=355 name=48484000.ethernet
irq/354-4848400-85 [000] 90.640378: irq_handler_exit: irq=355 ret=handled
irq/354-4848400-85 [000] 90.640382: sched_waking: comm=irq/355-4848400 pid=86 prio=49 target_cpu=001
irq/354-4848400-85 [000] 90.640394: sched_wakeup: irq/355-4848400:86 [49] success=1 CPU:001
iperf-1284 [001] 90.640401: sched_stat_runtime: comm=iperf pid=1284 runtime=133387 [ns] vruntime=2105770183 [ns]
iperf-1284 [001] 90.640412: sched_switch: iperf:1284 [120] R ==> irq/355-4848400:86 [49]
irq/355-4848400-86 [001] 90.640419: softirq_raise: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.640430: softirq_entry: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.640463: softirq_exit: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.640489: sched_switch: irq/355-4848400:86 [49] S ==> iperf:1284 [120]
irq/354-4848400-85 [000] 90.640560: softirq_exit: vec=3 [action=NET_RX]
irq/354-4848400-85 [000] 90.640568: softirq_raise: vec=3 [action=NET_RX]
irq/354-4848400-85 [000] 90.640579: softirq_entry: vec=3 [action=NET_RX]
irq/354-4848400-85 [000] 90.640606: irq_handler_entry: irq=355 name=48484000.ethernet
irq/354-4848400-85 [000] 90.640608: irq_handler_exit: irq=355 ret=handled
irq/354-4848400-85 [000] 90.640611: sched_waking: comm=irq/355-4848400 pid=86 prio=49 target_cpu=001
irq/354-4848400-85 [000] 90.640623: sched_wakeup: irq/355-4848400:86 [49] success=1 CPU:001
iperf-1284 [001] 90.640630: sched_stat_runtime: comm=iperf pid=1284 runtime=139080 [ns] vruntime=2105909263 [ns]
iperf-1284 [001] 90.640641: sched_switch: iperf:1284 [120] R ==> irq/355-4848400:86 [49]
irq/355-4848400-86 [001] 90.640648: softirq_raise: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.640659: softirq_entry: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.640692: softirq_exit: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.640720: sched_switch: irq/355-4848400:86 [49] S ==> iperf:1284 [120]
irq/354-4848400-85 [000] 90.640806: softirq_exit: vec=3 [action=NET_RX]
irq/354-4848400-85 [000] 90.640820: irq_handler_entry: irq=354 name=48484000.ethernet
irq/354-4848400-85 [000] 90.640823: irq_handler_exit: irq=354 ret=handled
irq/354-4848400-85 [000] 90.640833: irq_handler_entry: irq=355 name=48484000.ethernet
irq/354-4848400-85 [000] 90.640835: irq_handler_exit: irq=355 ret=handled
irq/354-4848400-85 [000] 90.640838: sched_waking: comm=irq/355-4848400 pid=86 prio=49 target_cpu=001
irq/354-4848400-85 [000] 90.640849: sched_wakeup: irq/355-4848400:86 [49] success=1 CPU:001
iperf-1284 [001] 90.640857: sched_stat_runtime: comm=iperf pid=1284 runtime=135501 [ns] vruntime=2106044764 [ns]
irq/354-4848400-85 [000] 90.640861: softirq_raise: vec=3 [action=NET_RX]
iperf-1284 [001] 90.640867: sched_switch: iperf:1284 [120] R ==> irq/355-4848400:86 [49]
irq/354-4848400-85 [000] 90.640872: irq_handler_entry: irq=354 name=48484000.ethernet
irq/354-4848400-85 [000] 90.640874: irq_handler_exit: irq=354 ret=handled
irq/355-4848400-86 [001] 90.640875: softirq_raise: vec=3 [action=NET_RX]
irq/354-4848400-85 [000] 90.640885: softirq_entry: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.640886: softirq_entry: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.640919: softirq_exit: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.640945: sched_switch: irq/355-4848400:86 [49] S ==> iperf:1284 [120]
irq/354-4848400-85 [000] 90.641052: irq_handler_entry: irq=355 name=48484000.ethernet
irq/354-4848400-85 [000] 90.641054: irq_handler_exit: irq=355 ret=handled
irq/354-4848400-85 [000] 90.641058: sched_waking: comm=irq/355-4848400 pid=86 prio=49 target_cpu=001
irq/354-4848400-85 [000] 90.641070: sched_wakeup: irq/355-4848400:86 [49] success=1 CPU:001
iperf-1284 [001] 90.641077: sched_stat_runtime: comm=iperf pid=1284 runtime=129483 [ns] vruntime=2106174247 [ns]
iperf-1284 [001] 90.641087: sched_switch: iperf:1284 [120] R ==> irq/355-4848400:86 [49]
irq/355-4848400-86 [001] 90.641095: softirq_raise: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.641106: softirq_entry: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.641132: sched_waking: comm=irq/354-4848400 pid=85 prio=49 target_cpu=000
irq/355-4848400-86 [001] 90.641138: sched_wakeup: irq/354-4848400:85 [49] success=1 CPU:000
irq/355-4848400-86 [001] 90.641159: softirq_exit: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.641185: sched_switch: irq/355-4848400:86 [49] S ==> iperf:1284 [120]
irq/354-4848400-85 [000] 90.641312: irq_handler_entry: irq=355 name=48484000.ethernet
irq/354-4848400-85 [000] 90.641314: irq_handler_exit: irq=355 ret=handled
irq/354-4848400-85 [000] 90.641317: sched_waking: comm=irq/355-4848400 pid=86 prio=49 target_cpu=001
irq/354-4848400-85 [000] 90.641329: sched_wakeup: irq/355-4848400:86 [49] success=1 CPU:001
iperf-1284 [001] 90.641336: sched_stat_runtime: comm=iperf pid=1284 runtime=149003 [ns] vruntime=2106323250 [ns]
iperf-1284 [001] 90.641347: sched_switch: iperf:1284 [120] R ==> irq/355-4848400:86 [49]
irq/355-4848400-86 [001] 90.641355: softirq_raise: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.641366: softirq_entry: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.641398: softirq_exit: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.641425: sched_switch: irq/355-4848400:86 [49] S ==> iperf:1284 [120]
irq/354-4848400-85 [000] 90.641526: softirq_exit: vec=3 [action=NET_RX]
irq/354-4848400-85 [000] 90.641526: irq_handler_entry: irq=355 name=48484000.ethernet
irq/354-4848400-85 [000] 90.641526: irq_handler_exit: irq=355 ret=handled
irq/354-4848400-85 [000] 90.641526: sched_waking: comm=irq/355-4848400 pid=86 prio=49 target_cpu=001
irq/354-4848400-85 [000] 90.641526: sched_wakeup: irq/355-4848400:86 [49] success=1 CPU:001
iperf-1284 [001] 90.641557: sched_stat_runtime: comm=iperf pid=1284 runtime=130946 [ns] vruntime=2106454196 [ns]
irq/354-4848400-85 [000] 90.641565: softirq_raise: vec=3 [action=NET_RX]
iperf-1284 [001] 90.641567: sched_switch: iperf:1284 [120] R ==> irq/355-4848400:86 [49]
irq/355-4848400-86 [001] 90.641575: softirq_raise: vec=3 [action=NET_RX]
irq/354-4848400-85 [000] 90.641576: irq_handler_entry: irq=354 name=48484000.ethernet
irq/354-4848400-85 [000] 90.641578: irq_handler_exit: irq=354 ret=handled
irq/355-4848400-86 [001] 90.641586: softirq_entry: vec=3 [action=NET_RX]
irq/354-4848400-85 [000] 90.641589: softirq_entry: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.641618: softirq_exit: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.641645: sched_switch: irq/355-4848400:86 [49] S ==> iperf:1284 [120]
irq/354-4848400-85 [000] 90.641760: irq_handler_entry: irq=355 name=48484000.ethernet
irq/354-4848400-85 [000] 90.641762: irq_handler_exit: irq=355 ret=handled
irq/354-4848400-85 [000] 90.641765: sched_waking: comm=irq/355-4848400 pid=86 prio=49 target_cpu=001
irq/354-4848400-85 [000] 90.641777: sched_wakeup: irq/355-4848400:86 [49] success=1 CPU:001
iperf-1284 [001] 90.641784: sched_stat_runtime: comm=iperf pid=1284 runtime=137941 [ns] vruntime=2106592137 [ns]
iperf-1284 [001] 90.641795: sched_switch: iperf:1284 [120] R ==> irq/355-4848400:86 [49]
irq/355-4848400-86 [001] 90.641802: softirq_raise: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.641814: softirq_entry: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.641845: softirq_exit: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.641871: sched_switch: irq/355-4848400:86 [49] S ==> iperf:1284 [120]
irq/354-4848400-85 [000] 90.641916: softirq_exit: vec=3 [action=NET_RX]
irq/354-4848400-85 [000] 90.641924: softirq_raise: vec=3 [action=NET_RX]
irq/354-4848400-85 [000] 90.641935: softirq_entry: vec=3 [action=NET_RX]
irq/354-4848400-85 [000] 90.641964: sched_waking: comm=iperf pid=1284 prio=120 target_cpu=001
irq/354-4848400-85 [000] 90.641969: sched_wakeup: iperf:1284 [120] success=1 CPU:001
irq/354-4848400-85 [000] 90.642006: irq_handler_entry: irq=355 name=48484000.ethernet
irq/354-4848400-85 [000] 90.642008: irq_handler_exit: irq=355 ret=handled
irq/354-4848400-85 [000] 90.642011: sched_waking: comm=irq/355-4848400 pid=86 prio=49 target_cpu=001
irq/354-4848400-85 [000] 90.642024: sched_wakeup: irq/355-4848400:86 [49] success=1 CPU:001
iperf-1284 [001] 90.642032: sched_stat_runtime: comm=iperf pid=1284 runtime=156486 [ns] vruntime=2106748623 [ns]
iperf-1284 [001] 90.642042: sched_switch: iperf:1284 [120] R ==> irq/355-4848400:86 [49]
irq/355-4848400-86 [001] 90.642049: softirq_raise: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.642060: softirq_entry: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.642093: softirq_exit: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.642120: sched_switch: irq/355-4848400:86 [49] S ==> iperf:1284 [120]
irq/354-4848400-85 [000] 90.642233: irq_handler_entry: irq=355 name=48484000.ethernet
irq/354-4848400-85 [000] 90.642235: irq_handler_exit: irq=355 ret=handled
irq/354-4848400-85 [000] 90.642238: sched_waking: comm=irq/355-4848400 pid=86 prio=49 target_cpu=001
irq/354-4848400-85 [000] 90.642250: sched_wakeup: irq/355-4848400:86 [49] success=1 CPU:001
iperf-1284 [001] 90.642257: sched_stat_runtime: comm=iperf pid=1284 runtime=135990 [ns] vruntime=2106884613 [ns]
iperf-1284 [001] 90.642268: sched_switch: iperf:1284 [120] R ==> irq/355-4848400:86 [49]
irq/355-4848400-86 [001] 90.642275: softirq_raise: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.642286: softirq_entry: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.642319: softirq_exit: vec=3 [action=NET_RX]
irq/355-4848400-86 [001] 90.642345: sched_switch: irq/355-4848400:86 [49] S ==> iperf:1284 [120]
irq/354-4848400-85 [000] 90.642393: softirq_exit: vec=3 [action=NET_RX]
irq/354-4848400-85 [000] 90.642419: sched_switch: irq/354-4848400:85 [49] S ==> rcuc/0:11 [98]
rcuc/0-11 [000] 90.642430: irq_handler_entry: irq=354 name=48484000.ethernet
rcuc/0-11 [000] 90.642432: irq_handler_exit: irq=354 ret=handled
rcuc/0-11 [000] 90.642435: sched_waking: comm=irq/354-4848400 pid=85 prio=49 target_cpu=000
rcuc/0-11 [000] 90.642442: sched_migrate_task: comm=irq/354-4848400 pid=85 prio=49 orig_cpu=0 dest_cpu=1
rcuc/0-11 [000] 90.642453: sched_wakeup: irq/354-4848400:85 [49] success=1 CPU:001
iperf-1284 [001] 90.642462: sched_stat_runtime: comm=iperf pid=1284 runtime=113053 [ns] vruntime=2106997666 [ns]
rcuc/0-11 [000] 90.642464: irq_handler_entry: irq=355 name=48484000.ethernet
rcuc/0-11 [000] 90.642466: irq_handler_exit: irq=355 ret=handled
rcuc/0-11 [000] 90.642469: sched_waking: comm=irq/355-4848400 pid=86 prio=49 target_cpu=001
iperf-1284 [001] 90.642473: sched_switch: iperf:1284 [120] R ==> irq/354-4848400:85 [49]
irq/354-4848400-85 [001] 90.642481: softirq_raise: vec=3 [action=NET_RX]
rcuc/0-11 [000] 90.642483: sched_wakeup: irq/355-4848400:86 [49] success=1 CPU:001
irq/354-4848400-85 [001] 90.642493: softirq_entry: vec=3 [action=NET_RX]
rcuc/0-11 [000] 90.642497: sched_migrate_task: comm=irq/355-4848400 pid=86 prio=49 orig_cpu=1 dest_cpu=0
rcuc/0-11 [000] 90.642515: irq_handler_entry: irq=354 name=48484000.ethernet
rcuc/0-11 [000] 90.642516: irq_handler_exit: irq=354 ret=handled
rcuc/0-11 [000] 90.642533: sched_switch: rcuc/0:11 [98] R ==> irq/355-4848400:86 [49]
irq/355-4848400-86 [000] 90.642541: softirq_raise: vec=3 [action=NET_RX]
irq/355-4848400-86 [000] 90.642551: softirq_entry: vec=3 [action=NET_RX]
irq/355-4848400-86 [000] 90.642562: sched_pi_setprio: comm=iperf pid=1284 oldprio=120 newprio=49
irq/355-4848400-86 [000] 90.642593: sched_switch: irq/355-4848400:86 [49] D ==> rcuc/0:11 [98]
rcuc/0-11 [000] 90.642621: sched_switch: rcuc/0:11 [98] S ==> ktimersoftd/0:4 [98]
ktimersoftd/0-4 [000] 90.642631: softirq_entry: vec=1 [action=TIMER]
ktimersoftd/0-4 [000] 90.642647: softirq_exit: vec=1 [action=TIMER]
ktimersoftd/0-4 [000] 90.642665: sched_switch: ktimersoftd/0:4 [98] S ==> ksoftirqd/0:3 [120]
ksoftirqd/0-3 [000] 90.642692: sched_stat_runtime: comm=ksoftirqd/0 pid=3 runtime=34486 [ns] vruntime=33313887612 [ns]
ksoftirqd/0-3 [000] 90.642703: sched_switch: ksoftirqd/0:3 [120] D ==> trace-cmd:1278 [120]
trace-cmd-1278 [000] 90.642742: sched_waking: comm=trace-cmd pid=1279 prio=120 target_cpu=001
trace-cmd-1278 [000] 90.642755: sched_wakeup: trace-cmd:1279 [120] success=1 CPU:001
irq/354-4848400-85 [001] 90.643012: softirq_exit: vec=3 [action=NET_RX]
trace-cmd-1278 [000] 90.643020: sched_stat_runtime: comm=trace-cmd pid=1278 runtime=328098 [ns] vruntime=554552351 [ns]
irq/354-4848400-85 [001] 90.643021: softirq_raise: vec=3 [action=NET_RX]
irq/354-4848400-85 [001] 90.643031: softirq_entry: vec=3 [action=NET_RX]
trace-cmd-1278 [000] 90.643036: sched_switch: trace-cmd:1278 [120] D ==> iperf:1282 [120]
iperf-1282 [000] 90.643055: sched_stat_runtime: comm=iperf pid=1282 runtime=34811 [ns] vruntime=560242796 [ns]
iperf-1282 [000] 90.643068: sched_switch: iperf:1282 [120] D ==> swapper/0:0 [120]
<idle>-0 [000] 90.643079: bputs: 0xc003e7d4s: 58f67c094e488
<idle>-0 [000] 90.643090: bprint: softirq_check_pending_idle: NOHZ: 80
--
regards,
-grygorii
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