OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, 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
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, lowest P state: performance
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack7slot7s.osadl.org (updated Mon Dec 22, 2025 12:43:46)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
26126	2	99	79,15	sleep2	0	-21	swapper/2	07:09:27	2
25933	2	90	66,8	sleep0	0	-21	swapper/0	07:06:56	0
26006	2	83	66,13	sleep1	0	-21	swapper/1	07:07:53	1
25998	2	81	68,9	sleep3	0	-21	swapper/3	07:07:47	3
26255	99	32	2,2	cyclictest	8291	-21	idleruntime-cro	07:40:00	2
26243	99	25	0,1	cyclictest	0	-21	swapper/0	07:10:15	0
26247	99	21	19,1	cyclictest	0	-21	swapper/1	12:25:14	1
26255	99	17	2,14	cyclictest	32601	-21	apt-get	10:45:14	2
26243	99	17	3,11	cyclictest	13380	-21	apache_processe	07:50:13	0
26247	99	16	3,12	cyclictest	0	-21	swapper/1	11:20:14	1
26247	99	16	14,1	cyclictest	0	-21	swapper/1	11:40:14	1
26243	99	16	1,9	cyclictest	0	-21	swapper/0	07:40:15	0
26243	99	16	10,2	cyclictest	25293	-21	wc	11:35:23	0
26257	99	15	3,8	cyclictest	9525	-21	apt-get	08:50:15	3
26255	99	15	1,11	cyclictest	0	-21	swapper/2	08:20:15	2
26247	99	15	13,1	cyclictest	0	-21	swapper/1	12:00:20	1
26243	99	15	9,2	cyclictest	13566	-21	grep	08:55:27	0
26257	99	14	10,3	cyclictest	32263	-21	wc	09:35:18	3
26257	99	14	0,13	cyclictest	11614	-21	grep	11:05:28	3
26255	99	14	13,1	cyclictest	0	-21	swapper/2	08:35:29	2
26247	99	14	12,1	cyclictest	13682	-21	cstates	07:50:15	1
26247	99	14	10,2	cyclictest	6430	-21	tr	07:35:12	1
26243	99	14	1,3	cyclictest	0	-21	swapper/0	10:35:13	0
26257	99	13	9,3	cyclictest	747	-21	sed	08:30:17	3
26257	99	13	9,2	cyclictest	12623	-21	tr	11:10:16	3
26257	99	13	8,4	cyclictest	31519	-21	wc	10:40:27	3
26257	99	13	8,3	cyclictest	19844	-21	grep	08:00:26	3
26257	99	13	4,5	cyclictest	225	-21	systemd-journal	08:20:00	3
26257	99	13	10,2	cyclictest	31588	-21	wc	08:25:26	3
26257	99	13	10,2	cyclictest	31588	-21	wc	08:25:25	3
26257	99	13	10,2	cyclictest	24286	-21	tail	10:25:29	3
26257	99	13	10,2	cyclictest	22645	-21	awk	08:10:01	3
26257	99	13	10,2	cyclictest	19208	-21	grep	12:35:16	3
26257	99	13	10,2	cyclictest	12268	-21	wc	07:45:23	3
26255	99	13	8,2	cyclictest	455	-21	dbus-daemon	07:19:59	2
26255	99	13	2,8	cyclictest	7032	-21	idleruntime-cro	10:59:59	2
26255	99	13	10,2	cyclictest	761	-21	sed	08:30:17	2
26255	99	13	10,2	cyclictest	6009	-21	tr	08:40:24	2
26255	99	13	10,2	cyclictest	22163	-21	tail	08:05:28	2
26255	99	13	10,2	cyclictest	1171	-21	basename	07:24:59	2
26247	99	13	9,3	cyclictest	30318	-21	grep	08:25:14	1
26247	99	13	9,3	cyclictest	30318	-21	grep	08:25:14	1
26247	99	13	7,5	cyclictest	16995	-21	grep	09:05:14	1
26247	99	13	11,1	cyclictest	20880	2	sleep1	08:05:15	1
26247	99	13	10,2	cyclictest	7912	-21	grep	08:45:17	1
26247	99	13	10,2	cyclictest	4910	-21	grep	07:30:20	1
26247	99	13	10,2	cyclictest	3782	-21	tr	10:50:21	1
26247	99	13	10,2	cyclictest	24996	-21	grep	11:35:19	1
26247	99	13	0,12	cyclictest	31207	-21	perf	07:20:00	1
26247	99	13	0,10	cyclictest	0	-21	swapper/1	08:55:16	1
26243	99	13	10,2	cyclictest	31075	-21	cat	08:25:18	0
26243	99	13	10,2	cyclictest	31075	-21	cat	08:25:18	0
26257	99	12	9,2	cyclictest	9939	-21	tail	09:55:27	3
26257	99	12	9,2	cyclictest	8561	-21	wc	11:00:20	3
26257	99	12	9,2	cyclictest	4813	-21	wc	09:45:23	3
26257	99	12	9,2	cyclictest	4463	-21	grep	12:00:18	3
26257	99	12	9,2	cyclictest	31145	-21	wc	11:50:01	3
26257	99	12	9,2	cyclictest	29299	-21	sed	08:20:28	3
26257	99	12	9,2	cyclictest	29112	-21	tr	09:30:15	3
26257	99	12	9,2	cyclictest	26125	-21	grep	10:30:20	3
26257	99	12	9,2	cyclictest	22404	-21	uname	09:15:19	3
26257	99	12	9,2	cyclictest	19745	-21	tr	11:25:14	3
26257	99	12	9,2	cyclictest	13634	-21	grep	12:20:24	3
26257	99	12	8,3	cyclictest	1894	-21	tail	09:40:18	3
26257	99	12	8,2	cyclictest	21974	-21	head	10:20:29	3
26257	99	12	8,2	cyclictest	21974	-21	head	10:20:29	3
26257	99	12	3,2	cyclictest	225	-21	systemd-journal	08:00:00	3
26257	99	12	1,5	cyclictest	225	-21	systemd-journal	10:59:59	3
26255	99	12	9,2	cyclictest	32649	-21	wc	09:35:24	2
26255	99	12	9,2	cyclictest	29758	-21	sed	11:45:20	2
26255	99	12	9,2	cyclictest	28148	-21	tail	07:10:27	2
26255	99	12	9,2	cyclictest	2651	-21	ls	07:25:23	2
26255	99	12	9,2	cyclictest	25492	-21	wc	11:35:24	2
26255	99	12	9,2	cyclictest	20868	-21	cut	11:25:22	2
26255	99	12	9,2	cyclictest	18378	-21	cut	11:20:21	2
26255	99	12	9,2	cyclictest	16475	-21	sleep	12:30:01	2
26255	99	12	9,2	cyclictest	14119	-21	wc	10:05:20	2
26255	99	12	1,2	cyclictest	0	-21	swapper/2	10:25:17	2
26255	99	12	10,1	cyclictest	31664	-21	tr	11:50:15	2
26255	99	12	10,1	cyclictest	11701	-21	sh	12:20:00	2
26247	99	12	9,2	cyclictest	5666	-21	turbostat.cron	09:50:00	1
26247	99	12	9,2	cyclictest	3489	-21	uname	08:35:22	1
26247	99	12	9,2	cyclictest	25309	-21	tr	08:15:15	1
26247	99	12	9,2	cyclictest	25256	-21	tr	10:30:14	1
26247	99	12	9,2	cyclictest	20312	-21	cut	10:20:16	1
26247	99	12	9,2	cyclictest	20312	-21	cut	10:20:16	1
26247	99	12	9,2	cyclictest	11685	-21	cron	12:20:00	1
26247	99	12	9,2	cyclictest	10622	-21	grep	11:05:19	1
26247	99	12	8,3	cyclictest	7405	-21	grep	12:10:15	1
26247	99	12	8,3	cyclictest	2097	-21	grep	11:55:17	1
26247	99	12	8,3	cyclictest	19510	-21	basename	11:25:13	1
26247	99	12	10,1	cyclictest	31143	-21	cat	11:50:01	1
26247	99	12	10,1	cyclictest	23089	-21	grep	09:15:26	1
26247	99	12	10,1	cyclictest	15488	-21	head	11:15:18	1
26247	99	12	0,11	cyclictest	9784	-21	wc	09:55:27	1
26243	99	12	9,2	cyclictest	8199	-21	cat	08:45:21	0
26243	99	12	9,2	cyclictest	3744	-21	ls	10:50:21	0
26243	99	12	9,2	cyclictest	3005	-21	grep	08:35:19	0
26243	99	12	9,2	cyclictest	28872	-21	sed	08:20:22	0
26243	99	12	9,2	cyclictest	21108	-21	sed	11:25:25	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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