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 Mon Jun 22, 2026 00:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
823622	2	182	0,2	sleep3	48	1	ktimers/3	22:20:30	3
629833	99	91	83,6	cyclictest	685953	-21	kworker/u8:1+flush-8:0	20:10:36	0
639630	2	71	0,1	sleep1	639635	-21	tr	19:15:36	1
629837	99	70	60,7	cyclictest	800430	-21	latency_hist	22:00:01	1
629837	99	70	60,7	cyclictest	800430	-21	latency_hist	22:00:00	1
629833	99	64	57,5	cyclictest	805031	-21	kworker/u8:3+flush-8:0	23:45:36	0
629837	99	62	53,6	cyclictest	1704890	-21	systemd-journal	19:10:31	1
629833	99	62	50,9	cyclictest	651614	-21	latency_hist	19:30:00	0
629833	99	60	53,5	cyclictest	685953	-21	kworker/u8:1+flush-8:0	20:40:32	0
629833	99	59	49,8	cyclictest	756136	-21	/usr/sbin/munin	21:15:37	0
629833	99	58	51,4	cyclictest	528357	-21	kworker/u8:0+flush-8:0	21:00:24	0
629833	99	57	51,4	cyclictest	860350	-21	kworker/u8:1+flush-8:0	23:40:36	0
629833	99	57	46,8	cyclictest	675730	-21	ntpq	19:50:35	0
629841	99	55	45,7	cyclictest	1704890	-21	systemd-journal	21:00:01	2
629833	99	55	45,8	cyclictest	899022	-21	ntpq	23:35:33	0
629833	99	55	44,8	cyclictest	3992462	-21	kworker/u8:1+flush-8:0	19:40:36	0
629837	99	54	48,4	cyclictest	670826	-21	ntpq	19:45:34	1
629833	99	54	49,4	cyclictest	805031	-21	kworker/u8:3+flush-8:0	22:15:37	0
629837	99	53	42,8	cyclictest	839397	-21	ntpq	22:35:33	1
629833	99	53	47,4	cyclictest	943640	-21	kworker/u8:2+events_unbound	00:25:25	0
629833	99	53	46,5	cyclictest	745647	-21	kworker/u8:1+flush-8:0	21:05:30	0
629833	99	53	44,7	cyclictest	528357	-21	kworker/u8:0+flush-8:0	20:35:39	0
629833	99	52	45,5	cyclictest	943640	-21	kworker/u8:2+flush-8:0	00:30:36	0
629837	99	51	35,11	cyclictest	1704890	-21	systemd-journal	23:36:03	1
629833	99	51	44,4	cyclictest	860350	-21	kworker/u8:1+events_unbound	23:05:21	0
629833	99	51	42,7	cyclictest	1704890	-21	systemd-journal	20:25:01	0
629837	99	50	44,3	cyclictest	860350	-21	kworker/u8:1+events_unbound	00:35:36	1
629833	99	50	40,8	cyclictest	958497	-21	ntpq	00:35:35	0
629833	99	50	40,8	cyclictest	918740	-21	ntpq	23:55:32	0
629833	99	50	40,7	cyclictest	670712	-21	kworker/u8:2+flush-8:0	22:30:23	0
629833	99	49	45,3	cyclictest	860350	-21	kworker/u8:1+events_unbound	23:10:36	0
629833	99	49	39,8	cyclictest	766325	-21	diskstats	21:25:25	0
629837	99	48	43,4	cyclictest	670712	-21	kworker/u8:2+flush-8:0	20:55:37	1
629837	99	48	40,6	cyclictest	874982	-21	latency_hist	23:15:01	1
629833	99	48	44,3	cyclictest	725695	-21	kworker/u8:3+flush-8:0	21:40:38	0
629833	99	46	40,4	cyclictest	805031	-21	kworker/u8:3+events_unbound	23:20:33	0
629833	99	46	37,6	cyclictest	890047	-21	latency_hist	23:30:01	0
629837	99	45	37,6	cyclictest	810797	-21	/usr/sbin/munin	22:10:37	1
629837	99	45	35,8	cyclictest	670712	-21	kworker/u8:2+flush-8:0	20:50:36	1
629833	99	45	36,7	cyclictest	789624	-21	ntpq	21:45:32	0
629833	99	45	36,6	cyclictest	691678	-21	latency_hist	20:10:02	0
629841	99	44	38,4	cyclictest	821116	-21	kworker/u8:0+flush-8:0	22:50:35	2
629833	99	44	39,3	cyclictest	860350	-21	kworker/u8:1+events_unbound	00:10:39	0
629833	99	44	38,4	cyclictest	725695	-21	kworker/u8:3+events_unbound	21:20:22	0
629833	99	44	37,5	cyclictest	740103	-21	ntpq	20:55:32	0
629833	99	44	37,5	cyclictest	528357	-21	kworker/u8:0+flush-8:0	19:55:35	0
629833	99	44	36,6	cyclictest	598327	-21	kworker/u8:3+events_unbound	19:20:36	0
629833	99	44	36,6	cyclictest	3992462	-21	kworker/u8:1+events_unbound	19:15:43	0
629833	99	44	33,7	cyclictest	670712	-21	kworker/u8:2+events_unbound	20:25:20	0
629841	99	43	32,9	cyclictest	954382	-21	awk	00:34:59	2
629833	99	43	37,4	cyclictest	821116	-21	kworker/u8:0+events_unbound	22:45:22	0
629833	99	43	37,4	cyclictest	670712	-21	kworker/u8:2+events_unbound	22:35:39	0
629833	99	43	36,5	cyclictest	805031	-21	kworker/u8:3+events_unbound	22:20:34	0
629837	99	42	35,5	cyclictest	900204	-21	apt-get	23:40:19	1
629833	99	42	35,5	cyclictest	860350	-21	kworker/u8:1+events_unbound	23:00:22	0
629841	99	41	33,6	cyclictest	1704890	-21	systemd-journal	20:10:00	2
629837	99	41	33,6	cyclictest	670712	-21	kworker/u8:2+flush-8:0	21:05:32	1
629837	99	41	33,5	cyclictest	1704890	-21	systemd-journal	22:20:31	1
629833	99	41	37,3	cyclictest	943640	-21	kworker/u8:2+flush-8:0	00:20:36	0
629833	99	41	35,4	cyclictest	725695	-21	kworker/u8:3+flush-8:0	20:50:31	0
629833	99	41	33,6	cyclictest	3992462	-21	kworker/u8:1+flush-8:0	19:35:39	0
629833	99	41	32,6	cyclictest	914712	-21	latency_hist	23:55:00	0
629841	99	40	34,4	cyclictest	913861	-21	kworker/u8:0+flush-8:0	00:13:09	2
629841	99	40	25,13	cyclictest	874582	-21	unixbench_singl	23:10:38	2
629833	99	40	36,3	cyclictest	528357	-21	kworker/u8:0+events_unbound	19:30:38	0
629837	99	39	30,7	cyclictest	869129	-21	ntpq	23:05:33	1
629837	99	39	26,8	cyclictest	1704890	-21	systemd-journal	22:40:32	1
629841	99	38	22,14	cyclictest	895469	-21	cpuspeed_turbos	23:35:23	2
629837	99	38	32,4	cyclictest	944738	-21	/usr/sbin/munin	00:25:33	1
629837	99	38	31,5	cyclictest	938656	-21	ntpq	00:15:35	1
629837	99	38	31,5	cyclictest	741304	-21	/usr/sbin/munin	21:00:32	1
629833	99	38	34,3	cyclictest	528357	-21	kworker/u8:0+events_unbound	20:30:37	0
629833	99	38	31,5	cyclictest	745647	-21	kworker/u8:1+flush-8:0	21:10:37	0
629833	99	38	28,8	cyclictest	774759	-21	ntpq	21:30:32	0
629381	2	38	24,8	sleep3	0	-21	swapper/3	19:06:40	3
629841	99	37	2,13	cyclictest	751227	-21	apt-get	21:10:21	2
629837	99	37	32,3	cyclictest	651633	-21	gpgv	19:30:00	1
629837	99	37	31,4	cyclictest	943640	-21	kworker/u8:2+flush-8:0	00:23:14	1
629837	99	37	31,4	cyclictest	909775	-21	latency_hist	23:50:01	1
629837	99	37	29,6	cyclictest	696862	-21	apt-get	20:15:18	1
629833	99	37	33,3	cyclictest	919715	-21	kworker/u8:3+flush-8:0	00:05:41	0
629833	99	37	32,3	cyclictest	821116	-21	kworker/u8:0+events_unbound	22:55:33	0
629841	99	36	2,14	cyclictest	761119	-21	apt-get	21:20:22	2
629841	99	36	21,13	cyclictest	760835	-21	latency_hist	21:20:00	2
629841	99	36	17,17	cyclictest	1704890	-21	systemd-journal	19:39:32	2
629837	99	36	28,6	cyclictest	879242	-21	ntpq	23:15:32	1
629837	99	35	28,5	cyclictest	642046	-21	apt-get	19:20:20	1
629837	99	35	26,7	cyclictest	815759	-21	/usr/sbin/munin	22:15:30	1
629833	99	35	31,3	cyclictest	670712	-21	kworker/u8:2+events_unbound	20:15:37	0
629833	99	35	28,5	cyclictest	528357	-21	kworker/u8:0+events_unbound	19:10:35	0
629364	2	35	3,9	sleep1	0	-21	swapper/1	19:06:30	1
629841	99	34	24,8	cyclictest	1704890	-21	systemd-journal	22:45:31	2
629841	99	34	17,15	cyclictest	651972	-21	cat	19:30:02	2
629837	99	34	28,4	cyclictest	865045	-21	latency_hist	23:05:01	1
629837	99	34	27,5	cyclictest	913870	-21	ntpq	23:50:35	1
629837	99	34	26,6	cyclictest	701791	-21	/usr/sbin/munin	20:20:36	1
629837	99	34	26,6	cyclictest	661701	-21	cron	19:40:01	1
629837	99	34	25,7	cyclictest	924953	-21	apt-get	00:05:19	1
629837	99	34	22,9	cyclictest	855163	-21	turbostat.cron	22:55:00	1
629837	99	34	21,10	cyclictest	1704890	-21	systemd-journal	22:00:32	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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