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 Jun 28, 2026 00:45:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2244621	99	72	21,15	cyclictest	2263477	-21	ssh	21:37:02	2
2244616	99	72	33,34	cyclictest	0	-21	swapper/0	23:50:01	0
2244621	99	71	18,41	cyclictest	0	-21	swapper/2	19:20:02	2
2244616	99	70	27,38	cyclictest	1	-21	systemd	00:10:01	0
2244629	99	68	4,10	cyclictest	2283740	-21	cron	22:19:59	3
2244621	99	68	19,14	cyclictest	2337834	-21	ssh	00:14:04	2
2244629	99	66	24,38	cyclictest	2300500	-21	latency_hist	22:55:01	3
2244629	99	66	2,16	cyclictest	2281398	-21	munin-run	22:15:01	3
2244629	99	66	2,16	cyclictest	2281398	-21	munin-run	22:15:01	3
2244621	99	66	16,14	cyclictest	2262055	-21	ssh	21:34:08	2
2244629	99	65	4,32	cyclictest	13	1	rcu_preempt	21:25:01	3
2244621	99	65	25,9	cyclictest	2302276	-21	ssh	22:58:44	2
2244621	99	65	20,14	cyclictest	2245645	-21	latency_hist	19:30:01	2
2244629	99	64	28,33	cyclictest	37	-21	ksoftirqd/3	22:25:00	3
2244629	99	64	28,33	cyclictest	37	-21	ksoftirqd/3	22:25:00	3
2244621	99	64	49,12	cyclictest	2324728	-21	ssh	23:45:54	2
2244621	99	64	25,7	cyclictest	2319767	-21	ssh	23:35:16	2
2244621	99	64	25,7	cyclictest	2319767	-21	ssh	23:35:16	2
2244621	99	64	19,14	cyclictest	2272412	-21	ssh	21:55:47	2
2244621	99	64	18,15	cyclictest	2278180	-21	rm	22:08:09	2
2244621	99	64	18,14	cyclictest	2315721	-21	ssh	23:27:01	2
2244621	99	64	18,14	cyclictest	2315721	-21	ssh	23:27:00	2
2244616	99	64	26,19	cyclictest	2331219	-21	ssh	00:00:01	0
2244616	99	64	26,19	cyclictest	2331219	-21	ssh	00:00:01	0
2244621	99	63	20,13	cyclictest	2258884	-21	ssh	21:27:19	2
2244629	99	62	23,34	cyclictest	37	-21	ksoftirqd/3	21:37:13	3
2244629	99	62	2,18	cyclictest	3467602	-21	systemd-journal	21:42:24	3
2244629	99	62	2,18	cyclictest	3467602	-21	systemd-journal	21:42:24	3
2244629	99	62	17,4	cyclictest	2247044	-21	latency_hist	19:55:02	3
2244621	99	62	50,9	cyclictest	2266316	-21	ssh	21:43:07	2
2244621	99	62	50,9	cyclictest	2266316	-21	ssh	21:43:06	2
2244621	99	62	22,11	cyclictest	2250795	-21	diskmemload	22:25:53	2
2244621	99	62	20,14	cyclictest	2335348	-21	ssh	00:08:50	2
2244621	99	62	15,13	cyclictest	2309426	-21	ssh	23:13:54	2
2244616	99	62	24,11	cyclictest	2253811	-21	ssh	21:16:12	0
2244629	99	61	23,34	cyclictest	37	-21	ksoftirqd/3	23:20:01	3
2244629	99	61	23,34	cyclictest	37	-21	ksoftirqd/3	21:55:15	3
2244629	99	61	21,12	cyclictest	275	-21	dbus-daemon	22:45:01	3
2244629	99	61	20,34	cyclictest	0	-21	swapper/3	19:20:01	3
2244629	99	61	19,10	cyclictest	37	-21	ksoftirqd/3	21:15:03	3
2244629	99	61	16,9	cyclictest	2275687	-21	sshd	22:02:54	3
2244621	99	61	48,10	cyclictest	2328286	-21	ssh	23:53:45	2
2244621	99	61	48,10	cyclictest	2306423	-21	ssh	23:07:26	2
2244621	99	61	43,14	cyclictest	2330015	-21	ssh	23:57:15	2
2244621	99	61	43,14	cyclictest	2330015	-21	ssh	23:57:15	2
2244621	99	61	16,11	cyclictest	2294941	-21	ssh	22:43:03	2
2244619	99	61	12,11	cyclictest	23	-21	ksoftirqd/1	21:53:48	1
2244619	99	61	12,11	cyclictest	23	-21	ksoftirqd/1	21:53:48	1
2244616	99	61	2,54	cyclictest	48	-21	kcompactd0	00:00:18	0
2244629	99	60	3,18	cyclictest	2250189	-21	latency_hist	20:55:02	3
2244629	99	60	18,4	cyclictest	2325839	-21	sh	23:48:32	3
2244629	99	60	18,4	cyclictest	2268045	-21	sh	21:46:36	3
2244629	99	60	1,16	cyclictest	2315985	-21	ssh	23:27:34	3
2244629	99	60	1,16	cyclictest	2315985	-21	ssh	23:27:34	3
2244621	99	60	46,10	cyclictest	2317856	-21	ssh	23:31:27	2
2244621	99	60	43,13	cyclictest	2292089	-21	ssh	22:37:01	2
2244621	99	60	39,17	cyclictest	2250545	-21	munin-run	21:05:01	2
2244621	99	60	39,17	cyclictest	2250545	-21	munin-run	21:05:00	2
2244621	99	60	18,13	cyclictest	2311655	-21	ssh	23:18:36	2
2244619	99	60	1,40	cyclictest	22	1	rcuc/1	21:15:02	1
2244619	99	60	1,40	cyclictest	22	1	rcuc/1	21:15:02	1
2244616	99	60	28,16	cyclictest	2341752	-21	ssh	00:22:06	0
2244629	99	59	3,16	cyclictest	2288568	-21	modprobe	22:30:00	3
2244629	99	59	27,28	cyclictest	37	-21	ksoftirqd/3	00:05:00	3
2244629	99	59	24,31	cyclictest	2291669	-21	sh	22:36:09	3
2244629	99	59	22,32	cyclictest	2246120	-21	sendmail	19:40:00	3
2244629	99	59	13,5	cyclictest	0	-21	swapper/3	00:05:34	3
2244621	99	59	44,12	cyclictest	2348788	-21	ssh	00:36:56	2
2244621	99	59	44,12	cyclictest	2275914	-21	ssh	22:03:21	2
2244621	99	59	43,12	cyclictest	2342782	-21	ssh	00:24:26	2
2244621	99	59	42,13	cyclictest	2346615	-21	ssh	00:32:25	2
2244621	99	59	42,13	cyclictest	2331806	-21	ssh	00:01:04	2
2244621	99	59	41,14	cyclictest	2323434	-21	ssh	23:43:19	2
2244621	99	59	41,14	cyclictest	2313555	-21	ssh	23:22:22	2
2244621	99	59	41,14	cyclictest	2289623	-21	ssh	22:31:54	2
2244621	99	59	23,10	cyclictest	0	-21	swapper/2	22:10:57	2
2244621	99	59	23,10	cyclictest	0	-21	swapper/2	22:10:57	2
2244621	99	59	14,13	cyclictest	2297562	-21	ssh	22:48:50	2
2244621	99	59	12,34	cyclictest	0	-21	swapper/2	20:45:02	2
2244619	99	59	7,14	cyclictest	2330887	-21	sh	23:59:27	1
2244619	99	59	7,14	cyclictest	2330887	-21	sh	23:59:27	1
2244619	99	59	3,25	cyclictest	2313430	-21	ssh	23:22:07	1
2244616	99	59	38,17	cyclictest	168	50	irq/134-8000000	22:55:00	0
2244629	99	58	3,19	cyclictest	2250786	-21	modprobe	21:10:00	3
2244629	99	58	26,28	cyclictest	2302826	-21	latency_hist	23:00:03	3
2244629	99	58	2,20	cyclictest	150	-21	pr/ttyS2	23:04:29	3
2244629	99	58	2,20	cyclictest	150	-21	pr/ttyS2	23:04:29	3
2244629	99	58	2,15	cyclictest	2321784	-21	latency_hist	23:40:00	3
2244629	99	58	2,15	cyclictest	2321784	-21	latency_hist	23:40:00	3
2244629	99	58	2,14	cyclictest	2350182	-21	latency_hist	00:40:02	3
2244629	99	58	15,6	cyclictest	37	-21	ksoftirqd/3	22:49:06	3
2244629	99	58	1,19	cyclictest	2277058	-21	ssh	22:05:27	3
2244629	99	58	1,16	cyclictest	2291009	-21	rm	22:35:02	3
2244621	99	58	45,10	cyclictest	2268246	-21	ssh	21:47:03	2
2244621	99	58	44,11	cyclictest	2299079	-21	ssh	22:51:48	2
2244621	99	58	42,13	cyclictest	2284289	-21	ssh	22:20:38	2
2244621	99	58	42,13	cyclictest	2284289	-21	ssh	22:20:38	2
2244621	99	58	42,13	cyclictest	2283007	-21	ssh	22:18:12	2
2244621	99	58	42,13	cyclictest	2256980	-21	ssh	21:22:59	2
2244621	99	58	42,12	cyclictest	2339057	-21	ssh	00:16:17	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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