OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #4

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8
Special All - All RT - Optimization - Ethernet - Thumbnails - Next

Click here to display the system's profile data or here to proceed to next system.

Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.
Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack5slot4s.osadl.org (updated Thu Jul 30, 2026 12:44:13)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3460638	99	66	1,63	cyclictest	1	-21	systemd	09:44:52	0
3555954	2	58	0,2	chrt	45	1	irq_work/3	08:43:04	3
3460638	99	58	52,4	cyclictest	3445872	-21	kworker/u8:3+events_unbound	09:05:00	0
3565717	2	57	0,3	chrt	0	-21	swapper/2	08:53:06	2
3460638	99	55	46,6	cyclictest	3482335	-21	latency_hist	07:30:01	0
3460638	99	54	47,5	cyclictest	3626169	-21	latency_hist	09:55:01	0
3704512	2	52	0,2	sleep2	0	-21	swapper/2	11:13:04	2
3460638	99	46	38,6	cyclictest	3591290	-21	latency_hist	09:20:00	0
3460641	99	45	36,6	cyclictest	3636037	-21	latency_hist	10:05:02	1
3460641	99	44	38,4	cyclictest	3685616	-21	kworker/u8:3+events_unbound	11:38:11	1
3460643	99	42	38,3	cyclictest	3537025	-21	kworker/u8:1+events_unbound	09:08:07	2
3460643	99	41	37,3	cyclictest	3685616	-21	kworker/u8:3+events_unbound	11:48:11	2
3460643	99	41	37,3	cyclictest	3660786	-21	kworker/u8:2+events_unbound	10:37:59	2
3460641	99	39	33,4	cyclictest	3750483	-21	apt-get	12:02:53	1
3460641	99	38	33,4	cyclictest	3537025	-21	kworker/u8:1+events_unbound	09:41:28	1
3460641	99	38	33,4	cyclictest	3218001	-21	kworker/u8:2+flush-8:0	09:03:11	1
3460641	99	38	29,7	cyclictest	3621253	-21	kworker/u8:2+flush-8:0	10:13:06	1
3460641	99	38	25,9	cyclictest	275	-21	systemd-journal	09:53:00	1
3460638	99	38	31,3	cyclictest	3705495	-21	sh	11:15:00	0
3460638	99	38	1,31	cyclictest	3460524	-21	kworker/0:1+events	08:45:02	0
3460641	99	37	29,6	cyclictest	3537025	-21	kworker/u8:1+flush-8:0	08:37:59	1
3460641	99	37	28,5	cyclictest	3759879	-21	apt-get	12:10:00	1
3460638	99	37	32,4	cyclictest	3218001	-21	kworker/u8:2+events_unbound	07:48:02	0
3460638	99	37	26,8	cyclictest	275	-21	systemd-journal	10:00:00	0
3460641	99	36	28,6	cyclictest	3472914	-21	apt-get	07:22:53	1
3460638	99	36	2,29	cyclictest	3460524	-21	kworker/0:1+events	07:56:24	0
3655791	2	35	0,6	sleep0	3655796	-21	unixbench_multi	10:23:11	0
3460643	99	35	31,3	cyclictest	3537025	-21	kworker/u8:1+events_unbound	09:13:05	2
3460643	99	35	24,10	cyclictest	3745063	-21	idleruntime-cro	11:55:00	2
3460641	99	35	31,3	cyclictest	3537025	-21	kworker/u8:1+events_unbound	08:42:57	1
3460641	99	35	25,7	cyclictest	3651518	-21	/usr/sbin/munin	10:23:03	1
3460638	99	35	2,28	cyclictest	3725320	-21	kworker/0:0+events	12:22:02	0
3460641	99	34	30,2	cyclictest	3690478	-21	unixbench_multi	10:58:15	1
3460641	99	34	24,8	cyclictest	3585685	-21	ntpq	09:13:07	1
3460638	99	34	27,5	cyclictest	3562146	-21	/usr/sbin/munin	08:53:13	0
3460638	99	34	27,5	cyclictest	3537025	-21	kworker/u8:1+flush-8:0	09:07:56	0
3460638	99	34	2,27	cyclictest	3636070	-21	kworker/0:1+events	10:37:04	0
3460638	99	34	2,26	cyclictest	3460524	-21	kworker/0:1+events	08:06:38	0
3460638	99	34	1,28	cyclictest	3460524	-21	kworker/0:1+events	07:36:02	0
3455975	2	34	3,6	sleep1	0	-21	swapper/1	07:06:46	1
3460641	99	33	27,4	cyclictest	3537025	-21	kworker/u8:1+events_unbound	10:00:01	1
3460641	99	33	26,4	cyclictest	3561697	-21	latency_hist	08:50:01	1
3460638	99	33	29,3	cyclictest	275	-21	systemd-journal	09:22:52	0
3460638	99	33	25,6	cyclictest	3720764	-21	/usr/sbin/munin	11:33:10	0
3460638	99	33	25,6	cyclictest	3720764	-21	/usr/sbin/munin	11:33:10	0
3460638	99	33	24,7	cyclictest	3780363	-21	/usr/sbin/munin	12:33:03	0
3460638	99	33	24,7	cyclictest	3780363	-21	/usr/sbin/munin	12:33:02	0
3460638	99	33	2,30	cyclictest	3460524	-21	kworker/0:1+events	07:16:08	0
3460638	99	33	22,9	cyclictest	3526883	-21	apt-get	08:15:00	0
3460638	99	33	2,26	cyclictest	3725320	-21	kworker/0:0+events	12:01:30	0
3460638	99	33	2,26	cyclictest	3636070	-21	kworker/0:1+events	11:00:48	0
3460643	99	32	27,4	cyclictest	3537025	-21	kworker/u8:1+events_unbound	09:00:02	2
3460641	99	32	27,4	cyclictest	3218001	-21	kworker/u8:2+flush-8:0	07:27:58	1
3460641	99	32	27,3	cyclictest	3564331	-21	kthreadcore	08:53:05	1
3460641	99	32	24,6	cyclictest	3487738	-21	/usr/sbin/munin	07:38:07	1
3460641	99	32	23,7	cyclictest	3705503	-21	latency_hist	11:15:01	1
3460638	99	32	25,4	cyclictest	0	-21	swapper/0	07:32:53	0
3460638	99	32	2,26	cyclictest	3636070	-21	kworker/0:1+events	10:55:18	0
3460638	99	32	2,26	cyclictest	3460524	-21	kworker/0:1+events	07:40:52	0
3460638	99	32	2,25	cyclictest	3460524	-21	kworker/0:1+events	08:16:36	0
3460638	99	32	0,27	cyclictest	3725320	-21	kworker/0:0+events	12:15:14	0
3460638	99	32	0,27	cyclictest	3460524	-21	kworker/0:1+events	08:22:04	0
3455859	2	32	4,9	sleep2	0	-21	swapper/2	07:05:15	2
3466038	2	31	0,2	sleep3	575	-21	kworker/3:2+events	07:15:03	3
3460643	99	31	27,3	cyclictest	3665950	-21	kworker/u8:1+events_unbound	10:53:12	2
3460641	99	31	27,2	cyclictest	3696437	-21	cut	11:07:56	1
3460641	99	31	23,6	cyclictest	3676631	-21	cut	10:47:55	1
3460638	99	31	25,4	cyclictest	3635831	-21	unixbench_singl	10:03:13	0
3460638	99	31	2,28	cyclictest	3460524	-21	kworker/0:1+events	08:44:33	0
3460638	99	31	2,25	cyclictest	3626189	-21	kworker/0:2+events	10:07:40	0
3460638	99	31	2,24	cyclictest	3596283	-21	kworker/0:3+events	09:30:02	0
3460638	99	31	2,24	cyclictest	3460524	-21	kworker/0:1+events	07:11:20	0
3460638	99	31	1,24	cyclictest	3636070	-21	kworker/0:1+events	10:50:20	0
3460638	99	31	0,26	cyclictest	3636070	-21	kworker/0:1+events	11:35:55	0
3460643	99	30	26,3	cyclictest	3754763	-21	kworker/u8:1+events_unbound	12:13:16	2
3460643	99	30	24,4	cyclictest	3680582	-21	unixbench_multi	10:48:11	2
3460641	99	30	20,7	cyclictest	3532055	-21	latency_hist	08:20:00	1
3460638	99	30	2,27	cyclictest	3460524	-21	kworker/0:1+events	07:21:18	0
3460638	99	30	2,23	cyclictest	3725320	-21	kworker/0:0+events	11:46:22	0
3460638	99	30	2,23	cyclictest	3636070	-21	kworker/0:1+events	11:07:12	0
3460638	99	30	2,23	cyclictest	3636070	-21	kworker/0:1+events	10:10:40	0
3460638	99	30	1,28	cyclictest	3725320	-21	kworker/0:0+events	12:06:02	0
3460638	99	30	1,24	cyclictest	3636070	-21	kworker/0:1+events	10:40:32	0
3460638	99	30	0,29	cyclictest	3636070	-21	kworker/0:1+events	10:16:46	0
3460714	2	29	0,3	sleep3	575	-21	kworker/3:2+events	07:10:00	3
3460643	99	29	4,9	cyclictest	3724730	-21	cut	11:33:10	2
3460643	99	29	4,9	cyclictest	3724730	-21	cut	11:33:09	2
3460643	99	29	25,3	cyclictest	3497666	-21	kworker/u8:0+events_unbound	08:18:01	2
3460643	99	29	25,3	cyclictest	3491311	-21	kworker/u8:1+events_unbound	07:41:02	2
3460641	99	29	24,4	cyclictest	3497666	-21	kworker/u8:0+flush-8:0	07:48:06	1
3460641	99	29	22,5	cyclictest	3651307	-21	kworker/u8:0+events_unbound	11:58:11	1
3460641	99	29	21,4	cyclictest	0	-21	swapper/1	07:15:02	1
3460638	99	29	7,17	cyclictest	3460524	-21	kworker/0:1+events	08:00:22	0
3460638	99	29	3,25	cyclictest	3636070	-21	kworker/0:1+events	11:22:10	0
3460638	99	29	2,26	cyclictest	3725320	-21	kworker/0:0+events	11:56:16	0
3460638	99	29	2,26	cyclictest	3725320	-21	kworker/0:0+events	11:41:16	0
3460638	99	29	2,26	cyclictest	3636070	-21	kworker/0:1+events	11:29:09	0
3460638	99	29	2,26	cyclictest	3606103	-21	kworker/0:0+events	09:48:30	0
3460638	99	29	0,28	cyclictest	3460524	-21	kworker/0:1+events	08:31:32	0
3460643	99	28	25,2	cyclictest	3536227	-21	grep	08:23:04	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2019-05-28 - 00:17