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 Wed Apr 29, 2026 12:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1178854	99	72	53,17	cyclictest	1259570	-21	apt-get	08:26:19	0
1178859	99	58	47,9	cyclictest	1487572	-21	ntpq	12:16:14	1
1178854	99	58	35,20	cyclictest	1508535	-21	latency_hist	12:40:01	0
1178859	99	57	50,5	cyclictest	1294564	-21	kworker/u8:1+flush-8:0	10:01:21	1
1178859	99	53	45,6	cyclictest	1453876	-21	kworker/u8:3+flush-8:0	12:21:15	1
1178859	99	52	46,5	cyclictest	1354898	-21	kworker/u8:3+flush-8:0	10:21:20	1
1178859	99	52	44,6	cyclictest	1344534	-21	kworker/u8:2+flush-8:0	11:36:19	1
1178854	99	51	35,14	cyclictest	1294875	-21	apt-get	09:04:59	0
1457968	2	50	0,4	chrt	0	-21	swapper/1	11:46:16	1
1457968	2	50	0,4	chrt	0	-21	swapper/1	11:46:16	1
1178859	99	50	45,4	cyclictest	1453876	-21	kworker/u8:3+events_unbound	12:31:22	1
1178861	99	49	40,6	cyclictest	1508531	-21	turbostat.cron	12:40:00	2
1178859	99	49	45,3	cyclictest	1344534	-21	kworker/u8:2+events_unbound	10:26:18	1
1178859	99	49	44,4	cyclictest	3956362	-21	kworker/u8:3+events_unbound	07:21:18	1
1178859	99	49	44,3	cyclictest	1194995	-21	kworker/u8:0+flush-8:0	09:41:07	1
1178859	99	49	43,4	cyclictest	1399650	-21	kworker/u8:0+events_unbound	11:16:18	1
1178854	99	49	34,13	cyclictest	280	-21	systemd-journal	09:48:57	0
1178859	99	48	44,3	cyclictest	1453876	-21	kworker/u8:3+events_unbound	12:11:09	1
1178859	99	48	43,3	cyclictest	1354898	-21	kworker/u8:3+events_unbound	10:56:24	1
1178859	99	48	42,4	cyclictest	1453876	-21	kworker/u8:3+flush-8:0	12:06:16	1
1178859	99	48	42,4	cyclictest	1194995	-21	kworker/u8:0+flush-8:0	09:51:16	1
1178859	99	48	40,6	cyclictest	1230282	-21	latency_hist	08:00:01	1
1178854	99	48	31,15	cyclictest	1240769	-21	apt-get	08:11:03	0
1178859	99	47	43,3	cyclictest	1194995	-21	kworker/u8:0+flush-8:0	07:26:19	1
1178859	99	47	42,4	cyclictest	1310186	-21	kworker/u8:3+events_unbound	09:31:20	1
1178859	99	47	42,4	cyclictest	1194995	-21	kworker/u8:0+events_unbound	10:10:01	1
1178859	99	47	40,5	cyclictest	1205367	-21	kworker/u8:3+flush-8:0	08:06:20	1
1178859	99	47	39,6	cyclictest	1194995	-21	kworker/u8:0+events_unbound	09:16:15	1
1178859	99	46	42,3	cyclictest	1488232	-21	kworker/u8:1+events_unbound	12:36:19	1
1178859	99	46	41,4	cyclictest	1194995	-21	kworker/u8:0+flush-8:0	07:51:15	1
1178859	99	46	40,5	cyclictest	1245380	-21	kworker/u8:1+events_unbound	08:26:15	1
1178859	99	46	39,5	cyclictest	1498423	-21	latency_hist	12:30:01	1
1178859	99	46	39,5	cyclictest	1344534	-21	kworker/u8:2+events_unbound	10:46:04	1
1178854	99	46	38,5	cyclictest	1220362	-21	latency_hist	07:50:01	0
1178859	99	45	41,3	cyclictest	1205367	-21	kworker/u8:3+flush-8:0	08:11:21	1
1178859	99	45	40,4	cyclictest	1344534	-21	kworker/u8:2+events_unbound	11:06:09	1
1178859	99	45	40,4	cyclictest	1310186	-21	kworker/u8:3+flush-8:0	09:21:05	1
1178859	99	45	40,3	cyclictest	1472800	-21	ntpq	12:01:16	1
1178859	99	45	39,4	cyclictest	1414513	-21	kworker/u8:1+events_unbound	11:51:06	1
1178859	99	45	38,5	cyclictest	1414513	-21	kworker/u8:1+flush-8:0	11:56:17	1
1178859	99	44	38,5	cyclictest	1245380	-21	kworker/u8:1+events_unbound	08:51:06	1
1178859	99	44	38,4	cyclictest	1344534	-21	kworker/u8:2+flush-8:0	09:56:21	1
1178859	99	44	38,4	cyclictest	1310186	-21	kworker/u8:3+events_unbound	09:26:07	1
1178859	99	44	37,5	cyclictest	238201	-21	kworker/u8:2+flush-8:0	08:01:18	1
1178854	99	44	37,5	cyclictest	1399650	-21	kworker/u8:0+events_unbound	11:01:15	0
1178854	99	44	32,9	cyclictest	280	-21	systemd-journal	12:20:00	0
1178854	99	43	26,15	cyclictest	1472690	-21	needreboot	12:01:14	0
1178859	99	42	37,4	cyclictest	1178970	-21	kworker/u8:1+events_unbound	07:11:21	1
1178859	99	42	36,5	cyclictest	238201	-21	kworker/u8:2+flush-8:0	08:46:14	1
1178859	99	42	36,4	cyclictest	1194995	-21	kworker/u8:0+events_unbound	08:31:05	1
1178859	99	42	36,4	cyclictest	1194995	-21	kworker/u8:0+events_unbound	08:31:04	1
1178859	99	42	36,4	cyclictest	1178970	-21	kworker/u8:1+events_unbound	07:16:05	1
1178854	99	42	30,9	cyclictest	1191191	-21	diskstats	07:21:07	0
1178854	99	42	25,15	cyclictest	1255312	-21	systemd-run	08:25:00	0
1178861	99	41	31,8	cyclictest	1478570	-21	turbostat.cron	12:10:01	2
1178861	99	41	30,8	cyclictest	1270127	-21	awk	08:40:00	2
1178859	99	41	37,3	cyclictest	1439293	-21	kworker/u8:0+flush-8:0	11:41:22	1
1178859	99	41	37,3	cyclictest	1399650	-21	kworker/u8:0+flush-8:0	11:11:10	1
1178859	99	41	36,3	cyclictest	1245380	-21	kworker/u8:1+flush-8:0	08:41:09	1
1178859	99	41	35,4	cyclictest	1310186	-21	kworker/u8:3+flush-8:0	09:36:11	1
1178859	99	41	33,6	cyclictest	280	-21	systemd-journal	10:31:19	1
1178859	99	41	33,6	cyclictest	1200833	-21	/usr/sbin/munin	07:31:16	1
1178854	99	41	3,30	cyclictest	0	-21	swapper/0	10:31:03	0
1178854	99	41	2,26	cyclictest	0	-21	swapper/0	12:34:21	0
1178854	99	41	1,23	cyclictest	1235721	-21	runrttasks	08:05:11	0
1178854	99	41	1,22	cyclictest	589	-21	runrttasks	09:36:04	0
1187778	2	40	0,2	sleep2	37	1	rcuc/2	07:16:09	2
1178859	99	40	35,4	cyclictest	1399650	-21	kworker/u8:0+events_unbound	11:01:17	1
1178859	99	40	34,5	cyclictest	1374132	-21	kworker/u8:0+flush-8:0	10:36:15	1
1178859	99	40	34,4	cyclictest	1414513	-21	kworker/u8:1+events_unbound	11:31:22	1
1178859	99	40	33,5	cyclictest	1280021	-21	kworker/u8:3+flush-8:0	08:56:15	1
1178854	99	40	27,10	cyclictest	280	-21	systemd-journal	10:25:01	0
1178854	99	40	24,14	cyclictest	0	-21	swapper/0	09:15:00	0
1178854	99	40	2,29	cyclictest	0	-21	swapper/0	08:51:02	0
1193803	2	39	0,5	sleep3	75	-21	kworker/3:1+mm_percpu_wq	07:21:13	3
1178859	99	39	35,3	cyclictest	1194995	-21	kworker/u8:0+flush-8:0	09:11:56	1
1178859	99	39	33,5	cyclictest	1194995	-21	kworker/u8:0+events_unbound	08:21:18	1
1178854	99	39	33,4	cyclictest	1194995	-21	kworker/u8:0+flush-8:0	09:30:01	0
1178854	99	39	3,28	cyclictest	0	-21	swapper/0	11:06:00	0
1178854	99	39	25,12	cyclictest	1210474	-21	cron	07:40:00	0
1178854	99	39	23,14	cyclictest	1448567	-21	unixbench_singl	11:36:21	0
1178854	99	39	2,24	cyclictest	0	-21	swapper/0	11:48:31	0
1178854	99	39	2,24	cyclictest	0	-21	swapper/0	11:48:31	0
1178854	99	39	22,12	cyclictest	0	-21	swapper/0	10:16:07	0
1178854	99	39	1,22	cyclictest	589	-21	runrttasks	10:46:19	0
1178854	99	39	1,22	cyclictest	589	-21	runrttasks	07:26:02	0
1178859	99	38	34,3	cyclictest	1344534	-21	kworker/u8:2+flush-8:0	10:51:20	1
1178859	99	38	33,4	cyclictest	1194995	-21	kworker/u8:0+flush-8:0	09:01:11	1
1178854	99	38	4,26	cyclictest	0	-21	swapper/0	09:21:03	0
1178854	99	38	3,27	cyclictest	0	-21	swapper/0	11:16:02	0
1178854	99	38	3,27	cyclictest	0	-21	swapper/0	10:56:04	0
1178854	99	38	3,26	cyclictest	0	-21	swapper/0	09:41:02	0
1178854	99	38	2,27	cyclictest	0	-21	swapper/0	10:06:14	0
1178854	99	38	2,22	cyclictest	0	-21	swapper/0	07:19:24	0
1178854	99	38	2,20	cyclictest	1443303	-21	cat	11:31:20	0
1178854	99	38	19,17	cyclictest	1289915	-21	sendmail	09:00:00	0
1178854	99	38	0,25	cyclictest	1354575	-21	taskset	10:04:23	0
1178859	99	37	33,3	cyclictest	1344534	-21	kworker/u8:2+events_unbound	10:41:20	1
1178859	99	37	31,5	cyclictest	238201	-21	kworker/u8:2+events_unbound	07:41:03	1
1178859	99	37	31,4	cyclictest	1434276	-21	kworker/u8:3+events_unbound	11:26:21	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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