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
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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: ondemand
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack5slot4s.osadl.org (updated Mon Jun 29, 2026 12:44:16)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1085648	99	65	58,5	cyclictest	1191789	-21	kworker/u8:3+flush-8:0	10:05:33	1
1085648	99	64	58,4	cyclictest	737627	-21	kworker/u8:0+events_unbound	07:15:03	1
1085648	99	61	54,5	cyclictest	1242260	-21	kworker/u8:2+events_unbound	10:40:33	1
1085648	99	60	55,3	cyclictest	1197875	-21	kworker/u8:0+events_unbound	09:40:30	1
1085648	99	60	53,5	cyclictest	1191789	-21	kworker/u8:3+flush-8:0	09:30:25	1
1085648	99	60	53,5	cyclictest	1191789	-21	kworker/u8:3+flush-8:0	09:30:25	1
1085648	99	58	51,5	cyclictest	1197875	-21	kworker/u8:0+flush-8:0	10:55:26	1
1085648	99	57	52,4	cyclictest	1197875	-21	kworker/u8:0+events_unbound	09:10:33	1
1085648	99	56	49,6	cyclictest	1197875	-21	kworker/u8:0+flush-8:0	09:55:26	1
1085644	99	55	50,4	cyclictest	1197875	-21	kworker/u8:0+flush-8:0	10:00:00	0
1085648	99	54	48,5	cyclictest	944644	-21	kworker/u8:1+flush-8:0	07:20:29	1
1085648	99	54	48,4	cyclictest	1191789	-21	kworker/u8:3+flush-8:0	11:10:25	1
1085653	99	53	41,9	cyclictest	1236366	-21	ntpq	09:35:28	2
1085648	99	53	49,3	cyclictest	1242260	-21	kworker/u8:2+events_unbound	10:25:32	1
1085648	99	53	49,3	cyclictest	1191789	-21	kworker/u8:3+flush-8:0	12:00:30	1
1085648	99	53	47,4	cyclictest	1191789	-21	kworker/u8:3+flush-8:0	11:25:26	1
1085648	99	52	47,4	cyclictest	1242260	-21	kworker/u8:2+flush-8:0	10:30:26	1
1085648	99	52	46,4	cyclictest	1147868	-21	kworker/u8:1+events_unbound	08:45:24	1
1085648	99	51	45,4	cyclictest	1191789	-21	kworker/u8:3+events_unbound	11:40:27	1
1085648	99	51	45,4	cyclictest	1191789	-21	kworker/u8:3+events_unbound	10:45:30	1
1085648	99	50	45,4	cyclictest	1102048	-21	kworker/u8:3+flush-8:0	08:05:30	1
1085648	99	50	45,3	cyclictest	1191789	-21	kworker/u8:3+events_unbound	12:30:28	1
1085648	99	50	45,3	cyclictest	1191789	-21	kworker/u8:3+events_unbound	12:30:27	1
1085648	99	50	44,4	cyclictest	1117356	-21	kworker/u8:1+flush-8:0	07:50:30	1
1085648	99	50	42,6	cyclictest	1191789	-21	kworker/u8:3+flush-8:0	10:15:32	1
1085648	99	50	42,6	cyclictest	1102048	-21	kworker/u8:3+flush-8:0	07:35:30	1
1085644	99	50	40,8	cyclictest	1266089	-21	ntpq	10:05:27	0
1085653	99	49	42,5	cyclictest	1704890	-21	systemd-journal	11:20:01	2
1085648	99	49	43,4	cyclictest	1191789	-21	kworker/u8:3+flush-8:0	11:30:31	1
1085648	99	49	42,5	cyclictest	1197875	-21	kworker/u8:0+events_unbound	10:50:26	1
1085648	99	47	43,2	cyclictest	1191789	-21	kworker/u8:3+events_unbound	12:10:27	1
1085648	99	47	41,5	cyclictest	1191789	-21	kworker/u8:3+flush-8:0	09:35:28	1
1085648	99	47	41,4	cyclictest	1371161	-21	kworker/u8:1+flush-8:0	12:15:25	1
1085648	99	47	41,4	cyclictest	1242260	-21	kworker/u8:2+events_unbound	10:20:30	1
1085648	99	47	40,5	cyclictest	1191789	-21	kworker/u8:3+flush-8:0	09:45:29	1
1085648	99	47	40,5	cyclictest	1048701	-21	kworker/u8:2+events_unbound	07:45:27	1
1085648	99	47	39,6	cyclictest	1133025	-21	kworker/u8:0+flush-8:0	08:00:27	1
1085648	99	47	38,6	cyclictest	1191789	-21	kworker/u8:3+events_unbound	11:05:30	1
1085644	99	47	39,6	cyclictest	1197631	-21	latency_hist	09:00:00	0
1085644	99	47	37,8	cyclictest	1410363	-21	ntpq	12:30:26	0
1085644	99	47	37,8	cyclictest	1410363	-21	ntpq	12:30:25	0
1085648	99	46	39,5	cyclictest	1191789	-21	kworker/u8:3+flush-8:0	09:15:28	1
1085648	99	45	40,4	cyclictest	1371161	-21	kworker/u8:1+flush-8:0	12:05:32	1
1085648	99	45	39,4	cyclictest	1133025	-21	kworker/u8:0+events_unbound	08:25:27	1
1085648	99	45	38,5	cyclictest	1411302	-21	kworker/u8:2+flush-8:0	12:35:26	1
1085648	99	45	38,5	cyclictest	1147868	-21	kworker/u8:1+events_unbound	08:20:24	1
1085648	99	45	37,5	cyclictest	1147868	-21	kworker/u8:1+events_unbound	08:40:28	1
1085648	99	43	39,3	cyclictest	1331559	-21	kworker/u8:1+flush-8:0	11:35:28	1
1085648	99	43	35,6	cyclictest	1090528	-21	latency_hist	07:15:02	1
1085648	99	42	36,5	cyclictest	1133025	-21	kworker/u8:0+events_unbound	07:55:31	1
1085648	99	42	35,5	cyclictest	1242260	-21	kworker/u8:2+flush-8:0	10:10:26	1
1085648	99	41	37,3	cyclictest	1331559	-21	kworker/u8:1+events_unbound	11:20:29	1
1085648	99	41	36,4	cyclictest	1191789	-21	kworker/u8:3+flush-8:0	12:20:33	1
1085648	99	41	36,3	cyclictest	1191789	-21	kworker/u8:3+events_unbound	09:00:30	1
1085648	99	41	35,4	cyclictest	1356173	-21	kworker/u8:2+events_unbound	11:55:28	1
1085648	99	41	35,4	cyclictest	1191789	-21	kworker/u8:3+flush-8:0	11:45:26	1
1085648	99	41	32,7	cyclictest	1206627	-21	ntpq	09:05:25	1
1085648	99	41	31,7	cyclictest	1704890	-21	systemd-journal	08:34:52	1
1085648	99	41	31,7	cyclictest	1704890	-21	systemd-journal	08:34:51	1
1085644	99	41	34,6	cyclictest	1102048	-21	kworker/u8:3+events_unbound	07:40:33	0
1085644	99	41	34,4	cyclictest	1133025	-21	kworker/u8:0+flush-8:0	08:00:29	0
1085644	99	41	33,6	cyclictest	1704890	-21	systemd-journal	10:46:00	0
1085648	99	40	34,5	cyclictest	1048701	-21	kworker/u8:2+events_unbound	08:15:28	1
1085648	99	40	33,5	cyclictest	1197875	-21	kworker/u8:0+flush-8:0	11:15:28	1
1085644	99	40	33,5	cyclictest	944644	-21	kworker/u8:1+flush-8:0	07:20:18	0
1085648	99	39	35,3	cyclictest	1197875	-21	kworker/u8:0+flush-8:0	09:25:33	1
1085648	99	39	34,4	cyclictest	1371161	-21	kworker/u8:1+events_unbound	12:25:27	1
1085648	99	39	34,3	cyclictest	1242260	-21	kworker/u8:2+flush-8:0	10:35:20	1
1085648	99	39	32,5	cyclictest	1197875	-21	kworker/u8:0+flush-8:0	09:50:26	1
1085644	99	39	32,5	cyclictest	1191789	-21	kworker/u8:3+flush-8:0	11:25:30	0
1085653	99	38	30,6	cyclictest	1704890	-21	systemd-journal	11:42:41	2
1085653	99	38	28,8	cyclictest	1704890	-21	systemd-journal	11:45:40	2
1085648	99	37	31,4	cyclictest	1191789	-21	kworker/u8:3+events_unbound	10:00:17	1
1085644	99	37	29,6	cyclictest	1327206	-21	/usr/sbin/munin	11:10:25	0
1085644	99	37	27,8	cyclictest	1704890	-21	systemd-journal	09:05:00	0
1085648	99	36	32,3	cyclictest	1191789	-21	kworker/u8:3+flush-8:0	09:20:33	1
1085648	99	36	26,8	cyclictest	1370683	-21	ntpq	11:50:26	1
1085644	99	36	29,5	cyclictest	1704890	-21	systemd-journal	07:35:04	0
1085644	99	36	26,8	cyclictest	1161549	-21	ntpq	08:20:25	0
1085644	99	36	25,9	cyclictest	1704890	-21	systemd-journal	11:00:01	0
1085644	99	36	24,10	cyclictest	1365758	-21	ntpq	11:45:25	0
1085648	99	35	30,3	cyclictest	1191789	-21	kworker/u8:3+events_unbound	08:55:01	1
1085648	99	35	29,4	cyclictest	1306065	-21	kworker/u8:1+events_unbound	11:00:17	1
1085653	99	34	28,4	cyclictest	1704890	-21	systemd-journal	12:04:59	2
1085644	99	34	27,5	cyclictest	1212028	-21	grep	09:10:33	0
1085644	99	34	24,8	cyclictest	1126449	-21	ntpq	07:45:25	0
1085653	99	33	24,7	cyclictest	1704890	-21	systemd-journal	11:25:00	2
1085644	99	33	26,5	cyclictest	1704890	-21	systemd-journal	11:51:14	0
1085644	99	33	23,8	cyclictest	0	-21	swapper/0	09:10:00	0
1085644	99	33	22,9	cyclictest	1387053	-21	diskstats	12:10:16	0
1085648	99	32	27,4	cyclictest	1117356	-21	kworker/u8:1+flush-8:0	07:40:21	1
1085648	99	32	26,4	cyclictest	1191789	-21	kworker/u8:3+flush-8:0	08:55:16	1
1085648	99	32	26,4	cyclictest	1177640	-21	latency_hist	08:40:01	1
1085648	99	32	26,4	cyclictest	1177640	-21	latency_hist	08:40:01	1
1085644	99	32	28,3	cyclictest	1147868	-21	kworker/u8:1+flush-8:0	08:45:41	0
1085644	99	32	28,2	cyclictest	1396450	-21	idleruntime-cro	12:19:59	0
1085644	99	32	27,4	cyclictest	1242260	-21	kworker/u8:2+flush-8:0	10:35:43	0
1085644	99	32	26,4	cyclictest	1414662	-21	taskset	12:35:21	0
1085644	99	32	25,5	cyclictest	1282362	-21	diskstats	10:25:19	0
1085644	99	32	22,8	cyclictest	1321038	-21	ntpq	11:00:27	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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