OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #3

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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackeslot3s.osadl.org (updated Sun Apr 05, 2026 12:45:23)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
940070	99	134	96,32	cyclictest	37	-21	ksoftirqd/3	09:35:02	3
940070	99	114	87,11	cyclictest	37	-21	ksoftirqd/3	08:15:01	3
940061	99	77	17,9	cyclictest	23	-21	ksoftirqd/1	11:12:12	1
940061	99	71	7,17	cyclictest	1018525	-21	ssh	11:58:49	1
940061	99	70	8,18	cyclictest	1005576	-21	ssh	11:28:27	1
940061	99	69	16,13	cyclictest	23	-21	ksoftirqd/1	10:05:02	1
940061	99	68	4,24	cyclictest	941652	-21	sed	07:40:02	1
940056	99	68	64,2	cyclictest	0	-21	swapper/0	09:00:02	0
940061	99	66	9,17	cyclictest	970088	-21	ssh	10:05:26	1
940061	99	66	7,19	cyclictest	988541	-21	ssh	10:48:42	1
940061	99	66	16,12	cyclictest	1012684	-21	/usr/sbin/munin	11:45:02	1
940061	99	66	16,12	cyclictest	1012684	-21	/usr/sbin/munin	11:45:01	1
940061	99	66	14,12	cyclictest	23	-21	ksoftirqd/1	11:54:42	1
940061	99	66	14,12	cyclictest	23	-21	ksoftirqd/1	11:54:42	1
940061	99	65	8,17	cyclictest	989277	-21	ssh	10:50:06	1
940061	99	65	4,21	cyclictest	980833	-21	ssh	10:30:25	1
940061	99	65	4,21	cyclictest	980833	-21	ssh	10:30:25	1
940056	99	65	6,45	cyclictest	193	50	irq/34-mmc1	08:10:03	0
940061	99	64	8,18	cyclictest	956524	-21	ssh	09:34:12	1
940061	99	64	16,11	cyclictest	23	-21	ksoftirqd/1	10:19:57	1
940061	99	64	15,9	cyclictest	23	-21	ksoftirqd/1	09:29:22	1
940056	99	64	8,37	cyclictest	12	-21	ksoftirqd/0	11:20:25	0
940056	99	64	1,60	cyclictest	0	-21	swapper/0	08:55:02	0
940066	99	63	9,40	cyclictest	29	1	rcuc/2	08:00:01	2
940061	99	63	16,10	cyclictest	23	-21	ksoftirqd/1	12:00:23	1
940061	99	62	8,17	cyclictest	1000130	-21	ssh	11:15:30	1
940061	99	62	14,11	cyclictest	23	-21	ksoftirqd/1	12:21:31	1
940061	99	62	13,10	cyclictest	23	-21	ksoftirqd/1	12:10:41	1
940061	99	62	12,13	cyclictest	23	-21	ksoftirqd/1	10:59:06	1
940056	99	62	36,8	cyclictest	12	-21	ksoftirqd/0	11:00:02	0
940061	99	61	8,15	cyclictest	976587	-21	ssh	10:20:30	1
940061	99	61	6,17	cyclictest	951931	-21	ssh	09:23:16	1
940061	99	61	5,17	cyclictest	1033829	-21	ssh	12:34:25	1
940061	99	61	16,9	cyclictest	23	-21	ksoftirqd/1	10:25:24	1
940061	99	61	15,10	cyclictest	23	-21	ksoftirqd/1	09:13:01	1
940061	99	61	13,10	cyclictest	23	-21	ksoftirqd/1	12:07:09	1
940061	99	60	6,15	cyclictest	1008665	-21	ssh	11:35:14	1
940061	99	60	3,21	cyclictest	1026575	-21	ssh	12:17:24	1
940061	99	60	16,10	cyclictest	23	-21	ksoftirqd/1	09:44:58	1
940061	99	60	12,9	cyclictest	23	-21	ksoftirqd/1	09:48:20	1
940061	99	60	12,14	cyclictest	985564	-21	ssh	10:41:26	1
940056	99	60	16,36	cyclictest	12	-21	ksoftirqd/0	10:27:07	0
940061	99	59	5,18	cyclictest	941308	-21	systemd-run	07:35:01	1
940056	99	59	27,14	cyclictest	1035762	-21	ssh	12:39:06	0
940066	99	58	49,6	cyclictest	945218	-21	kworker/2:3	09:34:51	2
940061	99	58	14,11	cyclictest	23	-21	ksoftirqd/1	12:36:42	1
940056	99	58	53,3	cyclictest	150	-21	pr/ttyS2	10:05:02	0
940056	99	58	3,22	cyclictest	997570	-21	ssh	11:10:01	0
940056	99	58	29,13	cyclictest	988397	-21	ssh	10:48:21	0
940056	99	58	18,12	cyclictest	12	-21	ksoftirqd/0	11:49:44	0
940056	99	58	10,42	cyclictest	3467602	-21	systemd-journal	08:40:00	0
940061	99	57	3,21	cyclictest	994609	-21	rm	11:02:48	1
940061	99	57	3,18	cyclictest	940832	-21	latency_hist	07:25:01	1
940061	99	57	16,9	cyclictest	23	-21	ksoftirqd/1	11:30:26	1
940061	99	57	16,9	cyclictest	23	-21	ksoftirqd/1	11:30:25	1
940061	99	57	13,9	cyclictest	23	-21	ksoftirqd/1	08:55:01	1
940061	99	57	13,11	cyclictest	23	-21	ksoftirqd/1	10:13:19	1
940061	99	57	13,10	cyclictest	23	-21	ksoftirqd/1	09:38:41	1
940061	99	57	12,9	cyclictest	23	-21	ksoftirqd/1	12:29:04	1
940056	99	57	46,7	cyclictest	954750	-21	systemd	09:30:02	0
940056	99	57	31,10	cyclictest	975254	-21	ssh	10:17:37	0
940056	99	57	19,33	cyclictest	982608	-21	latency_hist	10:35:02	0
940056	99	57	19,33	cyclictest	982608	-21	latency_hist	10:35:02	0
940066	99	56	48,5	cyclictest	976292	-21	kworker/2:0	11:37:42	2
940066	99	56	47,5	cyclictest	945218	-21	kworker/2:3	09:22:03	2
940061	99	56	8,16	cyclictest	984767	-21	munin-run	10:40:00	1
940061	99	56	12,9	cyclictest	23	-21	ksoftirqd/1	11:22:40	1
940061	99	56	1,14	cyclictest	965152	-21	ssh	09:54:18	1
940061	99	56	1,14	cyclictest	965152	-21	ssh	09:54:17	1
940056	99	56	27,13	cyclictest	984539	-21	ssh	10:39:26	0
940056	99	56	25,4	cyclictest	13	1	rcu_preempt	09:45:13	0
940066	99	55	47,5	cyclictest	976292	-21	kworker/2:0	11:35:03	2
940066	99	55	47,5	cyclictest	976292	-21	kworker/2:0	11:35:02	2
940061	99	55	35,14	cyclictest	1	-21	systemd	07:45:00	1
940061	99	55	13,7	cyclictest	23	-21	ksoftirqd/1	09:10:02	1
940061	99	55	13,7	cyclictest	23	-21	ksoftirqd/1	09:10:01	1
940061	99	55	12,14	cyclictest	949927	-21	sh	09:18:50	1
940061	99	55	10,8	cyclictest	23	-21	ksoftirqd/1	11:06:50	1
940070	99	54	34,15	cyclictest	275	-21	dbus-daemon	10:45:01	3
940066	99	54	46,5	cyclictest	976292	-21	kworker/2:0	12:30:02	2
940066	99	54	46,5	cyclictest	976292	-21	kworker/2:0	11:00:01	2
940066	99	54	45,5	cyclictest	976292	-21	kworker/2:0	12:33:04	2
940066	99	54	44,5	cyclictest	954740	-21	kworker/2:2	09:55:01	2
940066	99	54	44,5	cyclictest	954740	-21	kworker/2:2	09:55:00	2
940066	99	54	43,6	cyclictest	945218	-21	kworker/2:3	10:00:01	2
940061	99	54	6,14	cyclictest	943633	-21	munin-run	08:19:59	1
940061	99	54	17,7	cyclictest	23	-21	ksoftirqd/1	09:58:58	1
940056	99	54	5,30	cyclictest	13	1	rcu_preempt	10:00:04	0
940056	99	54	26,13	cyclictest	1009980	-21	ssh	11:38:44	0
940056	99	54	25,13	cyclictest	1033351	-21	ssh	12:33:20	0
940056	99	54	22,28	cyclictest	12	-21	ksoftirqd/0	12:20:32	0
940056	99	54	1,38	cyclictest	1001797	-21	ssh	11:19:49	0
940070	99	53	36,13	cyclictest	1	-21	systemd	09:20:01	3
940066	99	53	44,6	cyclictest	976292	-21	kworker/2:0	11:59:53	2
940066	99	53	43,6	cyclictest	976292	-21	kworker/2:0	10:40:01	2
940066	99	53	14,18	cyclictest	870140	-21	kworker/2:1	07:15:02	2
940056	99	53	26,11	cyclictest	956742	-21	ssh	09:34:41	0
940056	99	53	18,29	cyclictest	12	-21	ksoftirqd/0	11:53:00	0
940056	99	53	18,29	cyclictest	12	-21	ksoftirqd/0	11:53:00	0
940070	99	52	36,12	cyclictest	1	-21	systemd	10:15:00	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2021-09-01 - 00:33