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 Mon Aug 24, 2026 00:44:14)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3081254	99	61	51,7	cyclictest	275	-21	systemd-journal	19:37:37	1
3081254	99	57	49,5	cyclictest	3411039	-21	latency_hist	00:40:01	1
3081250	99	57	50,5	cyclictest	3173323	-21	diskstats	20:42:38	0
3081254	99	54	48,4	cyclictest	2954217	-21	kworker/u8:0+events_unbound	20:10:01	1
3081250	99	53	43,7	cyclictest	3081094	-21	latency_hist	19:10:01	0
3081254	99	52	48,3	cyclictest	3221716	-21	kworker/u8:0+events_unbound	22:27:38	1
3081254	99	52	47,4	cyclictest	3221716	-21	kworker/u8:0+flush-8:0	22:02:39	1
3081250	99	51	42,6	cyclictest	3306918	-21	latency_hist	22:55:01	0
3081250	99	51	42,6	cyclictest	2954217	-21	kworker/u8:0+flush-8:0	19:22:38	0
3081250	99	51	42,6	cyclictest	2954217	-21	kworker/u8:0+flush-8:0	19:22:38	0
3172812	2	50	0,2	chrt	29	1	ktimers/1	20:40:01	1
3081254	99	48	41,5	cyclictest	3272166	-21	base64	22:20:01	1
3081254	99	48	39,7	cyclictest	3197852	-21	kworker/u8:1+flush-8:0	21:07:48	1
3081254	99	47	42,4	cyclictest	1773283	-21	kworker/u8:3+flush-8:0	21:32:39	1
3081254	99	47	42,3	cyclictest	3296863	-21	kworker/u8:1+events_unbound	23:12:37	1
3081254	99	47	40,5	cyclictest	2954217	-21	kworker/u8:0+flush-8:0	21:02:49	1
3081254	99	46	41,4	cyclictest	3371220	-21	kworker/u8:2+events_unbound	00:22:42	1
3081250	99	46	38,5	cyclictest	3395974	-21	apt-get	00:25:03	0
3081250	99	46	37,6	cyclictest	1	-21	systemd	19:42:37	0
3081254	99	45	41,3	cyclictest	3261969	-21	kworker/u8:1+flush-8:0	22:22:38	1
3081254	99	45	40,4	cyclictest	3281449	-21	kworker/u8:3+events_unbound	22:57:45	1
3081254	99	45	38,5	cyclictest	1773283	-21	kworker/u8:3+flush-8:0	21:17:47	1
3081250	99	45	38,5	cyclictest	3395971	-21	latency_hist	00:25:01	0
3081257	99	44	23,18	cyclictest	3197624	-21	cat	21:05:00	2
3081254	99	44	40,3	cyclictest	3187729	-21	kworker/u8:2+events_unbound	22:42:45	1
3081254	99	44	39,4	cyclictest	1773283	-21	kworker/u8:3+events_unbound	19:27:52	1
3081254	99	44	36,6	cyclictest	3405316	-21	ntpq	00:32:49	1
3081254	99	44	36,6	cyclictest	2954217	-21	kworker/u8:0+flush-8:0	20:22:50	1
3081254	99	44	31,9	cyclictest	3167447	-21	latency_hist	20:35:01	1
3081254	99	43	38,4	cyclictest	3366097	-21	kworker/u8:1+events_unbound	00:17:37	1
3081254	99	43	37,4	cyclictest	1773283	-21	kworker/u8:3+flush-8:0	21:22:54	1
3081250	99	43	35,6	cyclictest	275	-21	systemd-journal	21:37:37	0
3081250	99	43	35,5	cyclictest	3147635	-21	latency_hist	20:15:01	0
3081254	99	42	38,3	cyclictest	1773283	-21	kworker/u8:3+events_unbound	20:27:38	1
3081250	99	42	34,6	cyclictest	2954217	-21	kworker/u8:0+flush-8:0	20:22:40	0
3081250	99	42	32,8	cyclictest	3167443	-21	apt-get	20:35:00	0
3081254	99	41	36,4	cyclictest	3034507	-21	kworker/u8:2+flush-8:0	19:17:37	1
3081254	99	41	35,4	cyclictest	2954217	-21	kworker/u8:0+events_unbound	20:57:39	1
3081254	99	40	36,3	cyclictest	2954217	-21	kworker/u8:0+events_unbound	19:47:50	1
3081254	99	40	35,3	cyclictest	3371220	-21	kworker/u8:2+events_unbound	00:27:47	1
3081254	99	40	35,3	cyclictest	3221716	-21	kworker/u8:0+flush-8:0	23:07:39	1
3081254	99	40	33,5	cyclictest	3093289	-21	kworker/u8:1+flush-8:0	19:52:47	1
3081257	99	39	24,13	cyclictest	3158233	-21	fschecks_count	20:27:38	2
3081254	99	39	34,4	cyclictest	3221716	-21	kworker/u8:0+flush-8:0	22:12:50	1
3081254	99	39	34,3	cyclictest	3221716	-21	kworker/u8:0+flush-8:0	21:52:41	1
3081254	99	39	33,5	cyclictest	3093289	-21	kworker/u8:1+flush-8:0	20:02:54	1
3081254	99	39	33,4	cyclictest	3128108	-21	apt-get	19:57:33	1
3081250	99	39	31,6	cyclictest	3202605	-21	latency_hist	21:10:01	0
3081257	99	38	29,7	cyclictest	275	-21	systemd-journal	00:31:04	2
3081254	99	38	33,4	cyclictest	3335877	-21	kworker/u8:0+flush-8:0	23:57:42	1
3081254	99	38	33,4	cyclictest	3335877	-21	kworker/u8:0+flush-8:0	23:57:42	1
3081254	99	38	33,4	cyclictest	3221716	-21	kworker/u8:0+flush-8:0	22:32:37	1
3081254	99	38	33,3	cyclictest	2954217	-21	kworker/u8:0+events_unbound	19:32:47	1
3081254	99	38	28,7	cyclictest	275	-21	systemd-journal	21:27:37	1
3081250	99	38	32,4	cyclictest	3221716	-21	kworker/u8:0+flush-8:0	22:17:46	0
3081250	99	38	30,6	cyclictest	3365511	-21	ntpq	23:52:47	0
3081250	99	38	28,8	cyclictest	3102979	-21	latency_hist	19:30:00	0
3081257	99	37	23,12	cyclictest	3107650	-21	unixbench_multi	19:32:55	2
3081254	99	37	32,3	cyclictest	3258135	-21	irqrtprio	22:07:41	1
3081254	99	37	31,5	cyclictest	3371220	-21	kworker/u8:2+flush-8:0	00:02:50	1
3081254	99	37	31,5	cyclictest	3093289	-21	kworker/u8:1+flush-8:0	19:42:38	1
3081254	99	37	31,4	cyclictest	3316797	-21	kworker/u8:2+flush-8:0	23:37:49	1
3125117	2	36	0,6	sleep3	45	1	irq_work/3	19:52:44	3
3081254	99	36	30,5	cyclictest	3316797	-21	kworker/u8:2+flush-8:0	23:42:53	1
3081254	99	36	30,5	cyclictest	1773283	-21	kworker/u8:3+flush-8:0	21:42:49	1
3081254	99	36	30,5	cyclictest	1773283	-21	kworker/u8:3+flush-8:0	21:42:49	1
3081254	99	36	30,4	cyclictest	2954217	-21	kworker/u8:0+flush-8:0	20:12:54	1
3081250	99	36	31,3	cyclictest	3221716	-21	kworker/u8:0+events_unbound	22:27:42	0
3081250	99	36	31,3	cyclictest	1773283	-21	kworker/u8:3+events_unbound	21:42:54	0
3081250	99	36	31,3	cyclictest	1773283	-21	kworker/u8:3+events_unbound	21:42:54	0
3370862	2	35	0,3	sleep2	37	1	rcuc/2	23:57:54	2
3370862	2	35	0,3	sleep2	37	1	rcuc/2	23:57:54	2
3081257	99	35	19,14	cyclictest	3326378	-21	unixbench_multi	23:12:54	2
3081254	99	35	29,5	cyclictest	3296863	-21	kworker/u8:1+flush-8:0	22:52:48	1
3081254	99	35	29,4	cyclictest	2954217	-21	kworker/u8:0+flush-8:0	20:47:50	1
3081254	99	35	19,12	cyclictest	275	-21	systemd-journal	20:45:00	1
3081250	99	35	27,6	cyclictest	275	-21	systemd-journal	22:25:00	0
3081257	99	34	22,11	cyclictest	3218204	-21	fschecks_time	21:27:39	2
3081257	99	34	20,12	cyclictest	3287325	-21	latency_hist	22:35:01	2
3081254	99	34	27,4	cyclictest	3237211	-21	kworker/u8:1+flush-8:0	21:57:38	1
3081250	99	34	26,6	cyclictest	3138456	-21	diskstats	20:07:37	0
3081250	99	34	23,9	cyclictest	3132758	-21	runrttasks	20:00:01	0
3081257	99	33	17,14	cyclictest	3396007	-21	apt-config	00:25:01	2
3081257	99	33	10,21	cyclictest	3201935	-21	ntpq	21:07:48	2
3081254	99	33	28,3	cyclictest	3324699	-21	kworker/u8:3+events_unbound	23:32:39	1
3081254	99	33	28,3	cyclictest	3187729	-21	kworker/u8:2+flush-8:0	22:37:41	1
3081254	99	33	27,4	cyclictest	3296863	-21	kworker/u8:1+events_unbound	23:20:00	1
3081254	99	33	27,4	cyclictest	3296863	-21	kworker/u8:1+events_unbound	23:02:54	1
3081250	99	33	28,4	cyclictest	3316797	-21	kworker/u8:2+flush-8:0	23:38:08	0
3081250	99	33	28,4	cyclictest	3221716	-21	kworker/u8:0+flush-8:0	22:02:07	0
3081250	99	33	28,3	cyclictest	1773283	-21	kworker/u8:3+flush-8:0	21:17:37	0
3081250	99	33	27,4	cyclictest	3281449	-21	kworker/u8:3+flush-8:0	22:41:08	0
3081257	99	32	28,3	cyclictest	3337036	-21	aten2_r5power_c	23:27:36	2
3081257	99	32	16,14	cyclictest	3362092	-21	fschecks_time	23:52:38	2
3081254	99	32	27,3	cyclictest	3083769	-21	kthreadcore	19:12:44	1
3081254	99	32	24,6	cyclictest	3324699	-21	kworker/u8:3+flush-8:0	23:27:49	1
3081254	99	32	22,8	cyclictest	3366097	-21	kworker/u8:1+flush-8:0	00:07:53	1
3081250	99	32	24,6	cyclictest	275	-21	systemd-journal	20:02:37	0
3081250	99	32	23,7	cyclictest	3292071	-21	latency_hist	22:40:01	0
3081250	99	32	23,7	cyclictest	3182664	-21	cp	20:50:00	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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