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 Tue Dec 16, 2025 00:44:12)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1253581	2	74	0,6	sleep1	29	1	ktimers/1	19:44:02	1
1366544	2	66	0,5	sleep2	0	-21	swapper/2	21:35:02	2
1443965	2	55	0,4	sleep3	0	-21	swapper/3	22:54:06	3
1220874	99	49	42,5	cyclictest	1371262	-21	latency_hist	21:40:01	1
1220874	99	49	39,7	cyclictest	1376191	-21	latency_hist	21:45:01	1
1220870	99	49	41,5	cyclictest	1326674	-21	latency_hist	20:55:01	0
1220870	99	49	38,8	cyclictest	1544246	-21	latency_hist	00:35:00	0
1220870	99	47	40,5	cyclictest	1340944	-21	kworker/u8:2+flush-8:0	21:14:04	0
1220874	99	46	42,3	cyclictest	1404076	-21	kworker/u8:3+events_unbound	22:25:14	1
1220874	99	46	42,3	cyclictest	1404076	-21	kworker/u8:3+events_unbound	22:25:13	1
1220874	99	45	42,2	cyclictest	1340944	-21	kworker/u8:2+events_unbound	21:14:03	1
1220874	99	45	41,3	cyclictest	1480751	-21	kworker/u8:4+events_unbound	00:00:38	1
1220874	99	43	39,3	cyclictest	1167905	-21	kworker/u8:0+events_unbound	19:45:11	1
1220874	99	42	38,3	cyclictest	1167905	-21	kworker/u8:0+events_unbound	21:20:30	1
1220874	99	41	38,2	cyclictest	1469982	-21	kworker/u8:1+events_unbound	23:30:32	1
1220874	99	41	38,2	cyclictest	1267379	-21	kworker/u8:1+events_unbound	20:40:31	1
1220870	99	41	32,6	cyclictest	1470109	-21	latency_hist	23:20:01	0
1220874	99	40	37,2	cyclictest	1220542	-21	kworker/u8:3+events_unbound	20:55:38	1
1220874	99	40	36,3	cyclictest	1469982	-21	kworker/u8:1+events_unbound	23:29:40	1
1220874	99	40	36,3	cyclictest	1267379	-21	kworker/u8:1+events_unbound	20:26:03	1
1220870	99	40	31,6	cyclictest	1420905	-21	latency_hist	22:30:00	0
1220870	99	40	31,6	cyclictest	1420905	-21	latency_hist	22:30:00	0
1220870	99	40	30,8	cyclictest	1400345	-21	ntpq	22:09:12	0
1220874	99	39	35,3	cyclictest	1404076	-21	kworker/u8:3+events_unbound	23:09:01	1
1220874	99	39	35,3	cyclictest	1247654	-21	kworker/u8:2+events_unbound	19:39:30	1
1220874	99	39	30,7	cyclictest	1539836	-21	/usr/sbin/munin	00:34:07	1
1220870	99	39	33,4	cyclictest	1188298	-21	kworker/u8:1+flush-8:0	19:29:11	0
1220870	99	39	29,7	cyclictest	1410811	-21	latency_hist	22:20:00	0
1216200	2	39	2,31	sleep3	0	-21	swapper/3	19:08:55	3
1220870	99	38	28,8	cyclictest	1221610	-21	diskstats	19:14:02	0
1220870	99	38	25,10	cyclictest	278	-21	systemd-journal	20:15:01	0
1216176	2	38	4,11	sleep1	0	-21	swapper/1	19:08:37	1
1220874	99	37	33,3	cyclictest	1267379	-21	kworker/u8:1+events_unbound	22:30:02	1
1220874	99	37	33,3	cyclictest	1220542	-21	kworker/u8:3+events_unbound	20:39:01	1
1220874	99	37	28,7	cyclictest	1296948	-21	latency_hist	20:25:00	1
1220870	99	37	32,4	cyclictest	1220542	-21	kworker/u8:3+flush-8:0	20:49:07	0
1463491	2	36	0,6	sleep1	28	1	rcuc/1	23:14:07	1
1220870	99	36	30,4	cyclictest	1351373	-21	systemd-run	21:20:00	0
1220870	99	36	26,7	cyclictest	1519409	-21	latency_hist	00:10:01	0
1220878	99	35	26,7	cyclictest	278	-21	systemd-journal	00:20:00	2
1220874	99	35	32,2	cyclictest	1421297	-21	kworker/u8:2+events_unbound	23:16:23	1
1220874	99	35	31,3	cyclictest	1480751	-21	kworker/u8:4+events_unbound	00:21:56	1
1220874	99	35	31,3	cyclictest	1267379	-21	kworker/u8:1+events_unbound	20:32:55	1
1220874	99	35	31,3	cyclictest	1267379	-21	kworker/u8:1+events_unbound	20:05:53	1
1220874	99	35	31,3	cyclictest	1220542	-21	kworker/u8:3+events_unbound	19:15:01	1
1220870	99	35	28,5	cyclictest	1220542	-21	kworker/u8:3+events_unbound	19:15:02	0
1220870	99	35	25,8	cyclictest	1533505	-21	ntpq	00:24:11	0
1259415	2	34	0,6	sleep2	0	-21	swapper/2	19:49:06	2
1220874	99	34	31,2	cyclictest	1247654	-21	kworker/u8:2+events_unbound	19:50:01	1
1220874	99	34	30,3	cyclictest	1267379	-21	kworker/u8:1+events_unbound	22:11:16	1
1220870	99	34	24,7	cyclictest	1237844	-21	latency_hist	19:25:01	0
1220874	99	33	29,3	cyclictest	1220542	-21	kworker/u8:3+events_unbound	20:53:54	1
1220870	99	33	23,8	cyclictest	1528573	-21	ntpq	00:19:10	0
1220874	99	32	29,2	cyclictest	1340944	-21	kworker/u8:2+events_unbound	22:02:54	1
1220874	99	32	29,2	cyclictest	1220542	-21	kworker/u8:3+events_unbound	19:15:53	1
1220874	99	32	28,3	cyclictest	1404076	-21	kworker/u8:3+events_unbound	22:16:53	1
1220874	99	32	28,3	cyclictest	1188298	-21	kworker/u8:1+events_unbound	19:28:54	1
1220874	99	32	25,1	cyclictest	16	1	rcu_preempt	00:14:13	1
1220870	99	32	27,3	cyclictest	1267379	-21	kworker/u8:1+events_unbound	20:24:06	0
1220874	99	31	28,2	cyclictest	1469982	-21	kworker/u8:1+events_unbound	23:23:31	1
1220874	99	31	28,2	cyclictest	1421297	-21	kworker/u8:2+events_unbound	23:04:09	1
1220874	99	31	28,2	cyclictest	1421297	-21	kworker/u8:2+events_unbound	22:35:39	1
1220874	99	31	28,2	cyclictest	1340944	-21	kworker/u8:2+events_unbound	22:07:13	1
1220874	99	31	27,3	cyclictest	1480456	-21	kworker/u8:2+events_unbound	23:51:55	1
1220874	99	31	26,3	cyclictest	1539299	-21	cron	00:30:00	1
1220874	99	31	26,3	cyclictest	1337793	-21	irqrtprio	21:09:04	1
1220874	99	31	26,3	cyclictest	1284877	-21	kthreadcore	20:14:08	1
1220870	99	31	27,2	cyclictest	1499532	-21	unixbench_multi	23:49:17	0
1220870	99	31	27,2	cyclictest	1247664	-21	cron	19:35:00	0
1220870	99	31	25,4	cyclictest	1453140	-21	kthreadcore	23:04:07	0
1220870	99	31	23,6	cyclictest	1385368	-21	ntpq	21:54:11	0
1220870	99	31	20,9	cyclictest	1253428	-21	diskstats	19:44:01	0
1220874	99	30	27,2	cyclictest	1267379	-21	kworker/u8:1+events_unbound	19:59:39	1
1220874	99	30	27,2	cyclictest	1188298	-21	kworker/u8:1+events_unbound	19:30:53	1
1220874	99	30	26,3	cyclictest	1404076	-21	kworker/u8:3+events_unbound	22:58:53	1
1220874	99	30	26,3	cyclictest	1340944	-21	kworker/u8:2+events_unbound	21:32:55	1
1220874	99	30	23,5	cyclictest	1220542	-21	kworker/u8:3+flush-8:0	19:23:59	1
1220874	99	30	22,6	cyclictest	278	-21	systemd-journal	00:09:53	1
1220870	99	30	23,5	cyclictest	1340944	-21	kworker/u8:2+flush-8:0	21:49:02	0
1220870	99	30	22,6	cyclictest	1444913	-21	ntpq	22:54:11	0
1220878	99	29	9,4	cyclictest	0	-21	swapper/2	23:44:14	2
1220878	99	29	22,5	cyclictest	1301863	-21	apt-get	20:30:00	2
1220874	99	29	26,2	cyclictest	1421297	-21	kworker/u8:2+events_unbound	22:54:54	1
1220874	99	29	25,3	cyclictest	1480751	-21	kworker/u8:4+events_unbound	23:57:08	1
1220874	99	29	25,3	cyclictest	1480456	-21	kworker/u8:2+events_unbound	23:46:32	1
1220874	99	29	25,3	cyclictest	1404076	-21	kworker/u8:3+events_unbound	22:40:14	1
1220874	99	29	25,3	cyclictest	1340944	-21	kworker/u8:2+events_unbound	21:56:33	1
1220874	99	29	25,3	cyclictest	1267379	-21	kworker/u8:1+events_unbound	22:21:53	1
1220874	99	29	25,3	cyclictest	1267379	-21	kworker/u8:1+events_unbound	21:53:39	1
1220874	99	29	0,7	cyclictest	1491488	-21	tr	23:44:06	1
1220870	99	29	24,4	cyclictest	1267379	-21	kworker/u8:1+flush-8:0	21:44:04	0
1220870	99	29	22,5	cyclictest	1263005	-21	apt-get	19:54:00	0
1215988	2	29	3,8	sleep2	0	-21	swapper/2	19:06:09	2
1220878	99	28	24,3	cyclictest	1220542	-21	kworker/u8:3+flush-8:0	19:15:14	2
1220874	99	28	25,2	cyclictest	1499682	-21	kworker/u8:1+events_unbound	00:15:49	1
1220874	99	28	25,2	cyclictest	1267379	-21	kworker/u8:1+events_unbound	20:17:33	1
1220874	99	28	25,2	cyclictest	1267379	-21	kworker/u8:1+events_unbound	20:17:33	1
1220874	99	28	24,3	cyclictest	1539243	-21	kworker/u8:0+events_unbound	00:38:30	1
1220874	99	28	24,3	cyclictest	1480456	-21	kworker/u8:2+events_unbound	23:38:12	1
1220874	99	28	24,3	cyclictest	1340944	-21	kworker/u8:2+events_unbound	21:47:05	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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