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 Wed Apr 15, 2026 12:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
4169636	2	306	0,3	sleep3	47	1	rcuc/3	11:46:15	3
4124788	2	97	0,2	chrt	75	-21	kworker/3:1+events	11:00:01	3
4026774	2	87	0,4	sleep3	75	-21	kworker/3:1-events	09:21:21	3
3893874	99	61	54,5	cyclictest	3900788	-21	kworker/u8:1+flush-8:0	07:21:30	1
3893874	99	59	45,4	cyclictest	3945177	-21	kworker/u8:1+flush-8:0	08:01:33	1
3893874	99	58	50,6	cyclictest	3900788	-21	kworker/u8:1+flush-8:0	07:31:30	1
9528	2	57	0,3	chrt	75	-21	kworker/3:1+events	12:16:29	3
3893874	99	56	47,7	cyclictest	280	-21	systemd-journal	12:00:00	1
3893874	99	54	45,6	cyclictest	3945450	-21	latency_hist	08:00:01	1
3893870	99	53	43,8	cyclictest	4089615	-21	apt-get	10:25:00	0
3893870	99	53	43,7	cyclictest	4194220	-21	latency_hist	12:10:01	0
3893870	99	52	41,9	cyclictest	4009309	-21	ntpq	09:01:25	0
3893874	99	50	45,4	cyclictest	4049984	-21	kworker/u8:0+flush-8:0	11:06:32	1
3893874	99	50	45,4	cyclictest	3879059	-21	kworker/u8:0+events_unbound	07:51:30	1
3893874	99	50	43,5	cyclictest	4049984	-21	kworker/u8:0+flush-8:0	11:26:16	1
3893874	99	50	43,5	cyclictest	3879059	-21	kworker/u8:0+events_unbound	08:56:28	1
3893874	99	49	44,3	cyclictest	4049984	-21	kworker/u8:0+flush-8:0	11:21:31	1
3893874	99	49	42,6	cyclictest	3975787	-21	kworker/u8:3+flush-8:0	08:41:30	1
3893874	99	49	40,7	cyclictest	4089615	-21	apt-get	10:25:01	1
3956703	2	48	0,1	chrt	3956615	-21	kthreadcore	08:11:21	1
3893874	99	48	44,3	cyclictest	3054410	-21	kworker/u8:3+events_unbound	07:15:03	1
3893874	99	48	41,5	cyclictest	3945177	-21	kworker/u8:1+flush-8:0	09:11:31	1
3893874	99	47	42,3	cyclictest	465	-21	kworker/u8:0+flush-8:0	12:21:31	1
3893874	99	47	42,3	cyclictest	4074975	-21	kworker/u8:3+events_unbound	10:11:29	1
3893874	99	47	41,5	cyclictest	4144763	-21	kworker/u8:3+flush-8:0	11:31:26	1
3893874	99	47	41,4	cyclictest	4049984	-21	kworker/u8:0+flush-8:0	10:33:37	1
3893874	99	47	41,4	cyclictest	4045023	-21	kworker/u8:1+flush-8:0	10:06:31	1
3893874	99	46	41,3	cyclictest	465	-21	kworker/u8:0+events_unbound	12:35:01	1
3893874	99	46	37,6	cyclictest	4063699	-21	ntpq	09:56:24	1
3893874	99	46	34,10	cyclictest	280	-21	systemd-journal	09:40:00	1
3893874	99	45	41,3	cyclictest	3916199	-21	kworker/u8:3+events_unbound	08:06:21	1
3893874	99	45	40,4	cyclictest	4084864	-21	kworker/u8:1+flush-8:0	10:46:32	1
3893874	99	45	39,4	cyclictest	3879059	-21	kworker/u8:0+events_unbound	09:31:29	1
3893874	99	45	39,4	cyclictest	3879059	-21	kworker/u8:0+events_unbound	09:31:29	1
3893874	99	45	38,6	cyclictest	4049984	-21	kworker/u8:0+flush-8:0	09:51:26	1
3893870	99	45	29,6	cyclictest	280	-21	systemd-journal	11:24:12	0
3893874	99	44	39,4	cyclictest	4115072	-21	kworker/u8:2+flush-8:0	11:01:16	1
3893874	99	44	38,5	cyclictest	4045023	-21	kworker/u8:1+flush-8:0	10:01:28	1
3893874	99	44	37,6	cyclictest	3924868	-21	kworker/u8:2+flush-8:0	07:41:25	1
3893874	99	43	39,3	cyclictest	4184347	-21	kworker/u8:1+events_unbound	12:20:00	1
3893874	99	43	36,5	cyclictest	3879059	-21	kworker/u8:0+flush-8:0	09:21:31	1
3893874	99	43	33,6	cyclictest	4144763	-21	kworker/u8:3+flush-8:0	11:36:25	1
3893874	99	42	37,3	cyclictest	4176269	-21	kworker/u8:0+events_unbound	11:55:01	1
3893874	99	42	37,3	cyclictest	3879059	-21	kworker/u8:0+flush-8:0	09:06:31	1
3894396	2	41	0,2	sleep3	75	-21	kworker/3:1+events	07:11:16	3
3893876	99	41	24,3	cyclictest	4069973	-21	aten2_r5power_e	10:06:13	2
3893874	99	41	36,4	cyclictest	465	-21	kworker/u8:0+events_unbound	12:36:23	1
3893874	99	41	35,5	cyclictest	4084864	-21	kworker/u8:1+flush-8:0	10:56:27	1
3893874	99	41	33,6	cyclictest	3054410	-21	kworker/u8:3+flush-8:0	07:11:26	1
3893874	99	41	28,10	cyclictest	280	-21	systemd-journal	10:45:00	1
3893870	99	41	35,3	cyclictest	280	-21	systemd-journal	08:52:10	0
3893874	99	40	36,3	cyclictest	4184347	-21	kworker/u8:1+flush-8:0	12:11:30	1
3893874	99	40	30,7	cyclictest	4034013	-21	ntpq	09:26:22	1
3893870	99	40	34,4	cyclictest	3900788	-21	kworker/u8:1+flush-8:0	07:16:17	0
3893870	99	40	0,38	cyclictest	3960284	-21	true	08:15:01	0
3893874	99	39	35,3	cyclictest	3879059	-21	kworker/u8:0+flush-8:0	08:21:21	1
3893874	99	39	34,4	cyclictest	3900788	-21	kworker/u8:1+flush-8:0	07:26:16	1
3893874	99	39	34,4	cyclictest	3900788	-21	kworker/u8:1+flush-8:0	07:26:16	1
3893874	99	39	34,3	cyclictest	4144763	-21	kworker/u8:3+flush-8:0	11:46:22	1
3893874	99	39	32,5	cyclictest	3879059	-21	kworker/u8:0+flush-8:0	08:31:26	1
3893874	99	39	30,6	cyclictest	280	-21	systemd-journal	11:43:12	1
3893874	99	39	30,6	cyclictest	280	-21	systemd-journal	11:43:12	1
3893870	99	39	35,3	cyclictest	4115072	-21	kworker/u8:2+flush-8:0	11:01:26	0
3893870	99	39	30,7	cyclictest	280	-21	systemd-journal	08:30:00	0
3893874	99	38	33,3	cyclictest	4049984	-21	kworker/u8:0+flush-8:0	09:46:21	1
3893874	99	38	27,4	cyclictest	4099581	-21	kworker/u8:3+flush-8:0	10:36:17	1
3893870	99	38	33,4	cyclictest	3879059	-21	kworker/u8:0+flush-8:0	08:36:17	0
3893874	99	37	32,4	cyclictest	3879059	-21	kworker/u8:0+events_unbound	08:36:25	1
3893874	99	37	32,3	cyclictest	3900788	-21	kworker/u8:1+events_unbound	07:36:24	1
3893874	99	37	31,4	cyclictest	3970754	-21	apt-get	08:26:12	1
3893874	99	37	29,6	cyclictest	4144763	-21	kworker/u8:3+events_unbound	12:06:16	1
3893870	99	37	26,9	cyclictest	280	-21	systemd-journal	10:30:00	0
3893876	99	36	25,8	cyclictest	4139578	-21	awk	11:15:00	2
3893876	99	36	22,2	cyclictest	4139993	-21	aten2_r5power_p	11:16:15	2
3893874	99	36	31,3	cyclictest	4049984	-21	kworker/u8:0+events_unbound	10:16:28	1
3893874	99	36	30,4	cyclictest	4049984	-21	kworker/u8:0+flush-8:0	11:11:32	1
3893874	99	36	30,4	cyclictest	3975787	-21	kworker/u8:3+events_unbound	08:46:21	1
3893874	99	36	29,5	cyclictest	3879059	-21	kworker/u8:0+flush-8:0	09:01:16	1
3893874	99	36	29,5	cyclictest	10176	-21	kworker/u8:2+flush-8:0	12:26:27	1
3893870	99	36	29,6	cyclictest	3916199	-21	kworker/u8:3+flush-8:0	07:31:28	0
3893870	99	36	25,9	cyclictest	4063725	-21	ntpq	09:56:25	0
3893874	99	35	29,4	cyclictest	4020085	-21	kworker/u8:2+flush-8:0	09:41:31	1
3893874	99	35	28,5	cyclictest	3879059	-21	kworker/u8:0+events_unbound	08:51:28	1
3893874	99	35	24,9	cyclictest	280	-21	systemd-journal	10:25:01	1
3893870	99	35	25,8	cyclictest	4098925	-21	ntpq	10:31:26	0
3893874	99	34	28,4	cyclictest	3916199	-21	kworker/u8:3+events_unbound	08:16:23	1
3893870	99	34	24,7	cyclictest	280	-21	systemd-journal	12:30:01	0
3893870	99	34	22,10	cyclictest	280	-21	systemd-journal	10:40:00	0
4109189	2	33	0,5	sleep2	37	1	rcuc/2	10:41:30	2
3988987	2	33	0,2	sleep0	16	1	rcu_preempt	08:41:21	0
3893876	99	33	23,8	cyclictest	280	-21	systemd-journal	09:55:00	2
3893874	99	33	27,4	cyclictest	4084864	-21	kworker/u8:1+flush-8:0	10:51:23	1
3893874	99	33	26,4	cyclictest	4144763	-21	kworker/u8:3+flush-8:0	12:01:20	1
3893874	99	32	25,5	cyclictest	3879059	-21	kworker/u8:0+flush-8:0	09:16:27	1
3893870	99	32	27,4	cyclictest	4099581	-21	kworker/u8:3+events_unbound	10:41:32	0
3893870	99	32	26,4	cyclictest	3945177	-21	kworker/u8:1+flush-8:0	09:11:17	0
3893874	99	31	24,5	cyclictest	3916199	-21	kworker/u8:3+flush-8:0	07:46:27	1
3893870	99	31	24,5	cyclictest	280	-21	systemd-journal	08:20:00	0
3893441	2	31	3,9	sleep2	0	-21	swapper/2	07:07:06	2
3893870	99	30	25,3	cyclictest	4049984	-21	kworker/u8:0+events_unbound	11:06:17	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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