OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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
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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: performance
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack2slot7s.osadl.org (updated Tue Dec 16, 2025 07:55:47)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
121053	99	62	41,18	cyclictest	926277	-21	sh	06:09:59	2
121053	99	61	34,5	cyclictest	1000752	-21	sh	06:12:53	2
121053	99	59	31,5	cyclictest	372595	-21	tee	05:41:16	2
121052	99	59	41,15	cyclictest	939407	-21	sh	06:10:29	1
121051	99	57	43,11	cyclictest	346151	-21	sh	05:40:01	0
121052	99	55	30,22	cyclictest	399221	-21	sh	05:42:23	1
121052	99	54	43,7	cyclictest	921085	-21	sh	06:09:43	1
121053	99	53	29,4	cyclictest	471604	-21	spawn	06:02:57	2
121052	99	52	33,15	cyclictest	1005919	-21	cron	06:25:01	1
121052	99	52	29,20	cyclictest	827597	-21	spawn	06:04:22	1
121051	99	50	40,7	cyclictest	921083	-21	sort	06:09:43	0
121053	99	49	41,5	cyclictest	123946	-21	cron	05:15:01	2
121052	99	49	21,3	cyclictest	0	-21	swapper/1	05:54:37	1
121051	99	49	42,4	cyclictest	950004	-21	sort	06:10:56	0
121051	99	49	34,5	cyclictest	410938	-21	sh	05:42:54	0
121052	99	48	21,2	cyclictest	0	-21	swapper/1	05:59:41	1
121051	99	45	33,10	cyclictest	427999	-21	execl	05:50:03	0
121053	99	44	36,5	cyclictest	1167	-21	mta-sts-daemon	05:54:36	2
121052	99	44	18,4	cyclictest	129101	-21	context1	05:32:53	1
121053	99	42	34,5	cyclictest	341434	-21	sh	05:39:40	2
121052	99	41	33,5	cyclictest	340607	-21	sh	05:39:36	1
121052	99	41	22,3	cyclictest	0	-21	swapper/1	05:50:03	1
121053	99	40	33,4	cyclictest	125646	-21	whetstone-doubl	05:20:01	2
121052	99	39	28,8	cyclictest	1165	-21	mta-sts-daemon	05:19:37	1
121051	99	39	30,7	cyclictest	309430	-21	spawn	05:35:00	0
121051	99	39	30,5	cyclictest	659067	-21	spawn	06:03:42	0
121053	99	38	31,4	cyclictest	1005929	-21	idleruntime-cro	06:25:01	2
121051	99	38	25,10	cyclictest	0	-21	swapper/0	05:50:45	0
121051	99	37	31,4	cyclictest	1010317	-21	grep	06:40:00	0
121052	99	36	28,5	cyclictest	124001	-21	systemd-run	05:15:01	1
121053	99	35	26,5	cyclictest	1168	-21	mta-sts-daemon	05:57:02	2
121053	99	35	25,7	cyclictest	309442	-21	spawn	05:35:00	2
121053	99	35	24,6	cyclictest	428196	-21	latency_hist	05:50:03	2
121051	99	35	28,5	cyclictest	1004440	-21	cron	06:20:01	0
121051	99	34	27,4	cyclictest	15	1	ktimers/0	05:19:42	0
121051	99	34	24,7	cyclictest	0	-21	swapper/0	05:15:01	0
121051	99	32	6,18	cyclictest	15	1	ktimers/0	06:29:38	0
121052	99	30	22,5	cyclictest	1009146	-21	aten_r2power_cu	06:39:30	1
121051	99	30	13,10	cyclictest	429857	-21	fstime	05:56:12	0
121053	99	29	24,2	cyclictest	0	-21	swapper/2	05:30:01	2
121052	99	29	21,5	cyclictest	0	-21	swapper/1	06:20:01	1
121054	99	28	3,12	cyclictest	0	-21	swapper/3	06:01:01	3
121053	99	28	22,3	cyclictest	0	-21	swapper/2	05:10:01	2
121053	99	28	20,5	cyclictest	1010317	-21	munin-plugin-st	06:40:00	2
121052	99	28	23,2	cyclictest	0	-21	swapper/1	05:30:01	1
121052	99	28	22,4	cyclictest	121050	-21	cyclictest	05:10:01	1
121051	99	28	21,3	cyclictest	0	-21	swapper/0	06:25:01	0
121053	99	27	22,2	cyclictest	0	-21	swapper/2	06:35:01	2
121051	99	27	23,3	cyclictest	127221	-21	kworker/u8:18-flush-0:21	05:27:33	0
121051	99	27	2,23	cyclictest	125986	-21	fstime	05:24:39	0
121051	99	27	2,21	cyclictest	122040	-21	ps	05:09:44	0
121053	99	26	18,5	cyclictest	1004458	-21	systemctl	06:20:01	2
121053	99	25	19,3	cyclictest	0	-21	swapper/2	05:24:49	2
121052	99	25	20,2	cyclictest	0	-21	swapper/1	06:35:01	1
121052	99	25	20,2	cyclictest	0	-21	swapper/1	06:29:33	1
121052	99	25	19,3	cyclictest	0	-21	swapper/1	05:05:01	1
121051	99	25	4,16	cyclictest	1008852	-21	cron	06:35:00	0
121053	99	24	16,5	cyclictest	4192896	-21	cups-browsed	06:29:12	2
121052	99	24	16,5	cyclictest	1165	-21	mta-sts-daemon	05:24:42	1
121054	99	22	7,10	cyclictest	0	-21	swapper/3	06:09:43	3
121054	99	21	3,9	cyclictest	0	-21	swapper/3	05:43:43	3
121054	99	21	3,10	cyclictest	0	-21	swapper/3	05:50:36	3
121054	99	20	1,9	cyclictest	0	-21	swapper/3	05:26:45	3
121054	99	19	3,11	cyclictest	0	-21	swapper/3	05:57:00	3
121054	99	19	2,9	cyclictest	0	-21	swapper/3	05:39:40	3
121054	99	19	2,9	cyclictest	0	-21	swapper/3	05:19:41	3
121051	99	19	1,15	cyclictest	121074	-21	latency_hist	05:05:02	0
121054	99	18	4,9	cyclictest	0	-21	swapper/3	06:11:47	3
121053	99	18	2,8	cyclictest	1168	-21	mta-sts-daemon	05:05:01	2
121054	99	17	2,9	cyclictest	0	-21	swapper/3	05:24:41	3
121054	99	16	3,7	cyclictest	0	-21	swapper/3	05:45:28	3
121054	99	16	3,10	cyclictest	0	-21	swapper/3	05:34:08	3
121054	99	16	1,8	cyclictest	0	-21	swapper/3	06:19:43	3
121054	99	15	1,9	cyclictest	0	-21	swapper/3	06:39:42	3
121054	99	15	1,9	cyclictest	0	-21	swapper/3	05:09:38	3
121054	99	15	1,8	cyclictest	0	-21	swapper/3	06:29:38	3
121054	99	14	1,8	cyclictest	0	-21	swapper/3	06:34:42	3
121054	99	14	1,6	cyclictest	0	-21	swapper/3	06:24:39	3
121054	99	13	1,8	cyclictest	0	-21	swapper/3	05:14:39	3
121054	99	8	1,5	cyclictest	0	-21	swapper/3	05:05:01	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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