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 Thu Jul 16, 2026 00:44:13)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1488109	2	173	0,3	sleep3	584	-21	kworker/3:2+events	22:02:45	3
1499895	2	95	0,3	sleep2	0	-21	swapper/2	22:17:33	2
1312881	99	61	50,8	cyclictest	281	-21	systemd-journal	20:20:00	0
1312886	99	56	45,9	cyclictest	281	-21	systemd-journal	23:50:01	1
1312890	99	53	41,9	cyclictest	1543055	-21	/usr/sbin/munin	23:00:01	2
1312886	99	52	43,7	cyclictest	1488715	-21	/usr/sbin/munin	22:07:42	1
1312881	99	51	45,4	cyclictest	1567546	-21	kworker/u8:1+flush-8:0	00:05:00	0
1312890	99	50	46,3	cyclictest	1271730	-21	kworker/u8:0+events_unbound	21:07:40	2
1312886	99	50	40,8	cyclictest	281	-21	systemd-journal	00:30:00	1
1312881	99	50	45,3	cyclictest	1448534	-21	kworker/u8:3+flush-8:0	23:02:29	0
1312881	99	49	41,6	cyclictest	1408967	-21	kworker/u8:2+flush-8:0	21:37:29	0
1312881	99	48	39,7	cyclictest	1572735	-21	apt-get	23:30:00	0
1312886	99	47	36,8	cyclictest	1443520	-21	latency_hist	21:20:01	1
1312881	99	47	41,4	cyclictest	1567546	-21	kworker/u8:1+flush-8:0	23:37:28	0
1502064	2	46	0,4	sleep0	16	1	rcu_preempt	22:17:35	0
1312886	99	46	38,5	cyclictest	1612584	-21	latency_hist	00:10:01	1
1312890	99	45	41,3	cyclictest	1408967	-21	kworker/u8:2+events_unbound	21:27:47	2
1312886	99	45	39,4	cyclictest	1602678	-40	logrotate	23:59:59	1
1312881	99	45	40,3	cyclictest	1398869	-21	kworker/u8:1+events_unbound	21:00:00	0
1312881	99	45	39,4	cyclictest	1271730	-21	kworker/u8:0+flush-8:0	20:47:42	0
1312886	99	44	37,5	cyclictest	1533626	-21	apt-get	22:52:23	1
1312886	99	44	34,8	cyclictest	1313178	-21	/usr/sbin/munin	19:12:37	1
1312881	99	44	36,6	cyclictest	1632624	-21	latency_hist	00:30:01	0
1312881	99	43	33,8	cyclictest	1364572	-21	/usr/sbin/munin	20:02:35	0
1312890	99	42	36,4	cyclictest	1463614	-21	kworker/u8:0+events_unbound	23:12:43	2
1312881	99	42	37,4	cyclictest	1463614	-21	kworker/u8:0+events_unbound	22:57:26	0
1312881	99	42	36,4	cyclictest	281	-21	systemd-journal	00:15:01	0
1312890	99	41	37,3	cyclictest	1349365	-21	kworker/u8:3+events_unbound	20:17:39	2
1312890	99	41	31,7	cyclictest	1587967	-21	cat	23:45:00	2
1312886	99	41	34,5	cyclictest	1454112	-21	apt-get	21:32:24	1
1312881	99	41	35,4	cyclictest	1463614	-21	kworker/u8:0+events_unbound	21:47:34	0
1312881	99	41	35,4	cyclictest	1398869	-21	kworker/u8:1+flush-8:0	20:37:28	0
1312881	99	41	30,9	cyclictest	1163051	-21	kworker/u8:2+flush-8:0	19:17:47	0
1312890	99	40	36,3	cyclictest	1271730	-21	kworker/u8:0+events_unbound	19:31:56	2
1312886	99	40	32,6	cyclictest	1271730	-21	kworker/u8:0+flush-8:0	19:42:43	1
1312886	99	40	31,7	cyclictest	281	-21	systemd-journal	23:05:00	1
1312886	99	40	30,7	cyclictest	281	-21	systemd-journal	00:12:58	1
1312881	99	40	34,4	cyclictest	1448534	-21	kworker/u8:3+flush-8:0	22:47:33	0
1312881	99	40	33,5	cyclictest	1432925	-21	ntpq	21:07:36	0
1312881	99	40	31,6	cyclictest	1493854	-21	/usr/sbin/munin	22:12:41	0
1312881	99	40	26,11	cyclictest	1271730	-21	kworker/u8:0+events_unbound	20:15:01	0
1312886	99	39	34,3	cyclictest	1398869	-21	kworker/u8:1+flush-8:0	20:37:41	1
1312881	99	39	26,9	cyclictest	281	-21	systemd-journal	23:25:00	0
1312890	99	38	28,7	cyclictest	1483409	-21	cat	22:00:02	2
1312881	99	38	32,4	cyclictest	281	-21	systemd-journal	00:35:52	0
1312881	99	38	24,10	cyclictest	1627455	-21	apt-get	00:25:00	0
1312890	99	37	33,3	cyclictest	1582684	-21	kworker/u8:3+events_unbound	23:45:18	2
1312890	99	37	33,3	cyclictest	1551228	-21	kworker/u8:2+events_unbound	23:07:34	2
1312886	99	37	32,3	cyclictest	1448534	-21	kworker/u8:3+flush-8:0	21:55:02	1
1312881	99	37	33,3	cyclictest	1271730	-21	kworker/u8:0+flush-8:0	19:42:42	0
1312881	99	37	32,3	cyclictest	1428745	-21	kworker/u8:3+flush-8:0	21:10:01	0
1312881	99	37	30,5	cyclictest	1612603	-21	kworker/u8:2+flush-8:0	00:15:02	0
1312881	99	37	30,5	cyclictest	1271730	-21	kworker/u8:0+flush-8:0	19:32:26	0
1312881	99	37	30,4	cyclictest	1271730	-21	kworker/u8:0+flush-8:0	21:17:44	0
1312890	99	36	27,7	cyclictest	1448699	-21	turbostat.cron	21:25:00	2
1312886	99	36	30,4	cyclictest	1163051	-21	kworker/u8:2+flush-8:0	20:32:28	1
1312886	99	36	29,5	cyclictest	1497607	-21	ntpq	22:12:35	1
1312886	99	36	29,5	cyclictest	1163051	-21	kworker/u8:2+flush-8:0	19:52:42	1
1312881	99	36	27,7	cyclictest	1448534	-21	kworker/u8:3+flush-8:0	22:07:29	0
1312881	99	36	26,7	cyclictest	1373276	-21	ntpq	20:07:37	0
1312881	99	36	23,9	cyclictest	281	-21	systemd-journal	22:40:00	0
1312881	99	36	23,9	cyclictest	281	-21	systemd-journal	21:55:01	0
1312881	99	35	28,4	cyclictest	1463614	-21	kworker/u8:0+flush-8:0	23:42:33	0
1312890	99	34	29,3	cyclictest	1271730	-21	kworker/u8:0+events_unbound	20:07:31	2
1312886	99	34	26,6	cyclictest	1389051	-21	cp	20:25:00	1
1312881	99	34	29,4	cyclictest	1463614	-21	kworker/u8:0+flush-8:0	22:27:27	0
1312881	99	34	29,3	cyclictest	1507434	-21	needreboot	22:22:35	0
1312881	99	34	28,3	cyclictest	1527776	-21	unixbench_multi	22:42:44	0
1312886	99	33	30,2	cyclictest	1469553	-21	irqcore	21:47:32	1
1312886	99	33	29,3	cyclictest	1448534	-21	kworker/u8:3+events_unbound	22:42:35	1
1312886	99	33	27,4	cyclictest	1513183	-21	apt	22:30:01	1
1312881	99	33	28,3	cyclictest	1271730	-21	kworker/u8:0+flush-8:0	19:47:40	0
1312881	99	33	27,4	cyclictest	1271730	-21	kworker/u8:0+events_unbound	21:22:42	0
1312881	99	33	26,5	cyclictest	1567546	-21	kworker/u8:1+events_unbound	23:32:41	0
1312881	99	33	24,7	cyclictest	1404440	-21	/usr/sbin/munin	20:42:42	0
1312519	2	33	4,9	sleep2	0	-21	swapper/2	19:07:48	2
1312886	99	32	28,2	cyclictest	0	-21	swapper/1	22:20:00	1
1312886	99	32	26,4	cyclictest	1312732	-21	kworker/u8:3+flush-8:0	19:17:29	1
1312886	99	32	24,6	cyclictest	281	-21	systemd-journal	22:47:57	1
1312886	99	32	20,9	cyclictest	281	-21	systemd-journal	21:42:56	1
1312881	99	32	27,4	cyclictest	1271730	-21	kworker/u8:0+flush-8:0	19:37:43	0
1312881	99	32	26,4	cyclictest	1389705	-21	tr	20:27:26	0
1312881	99	32	24,5	cyclictest	1349365	-21	kworker/u8:3+flush-8:0	20:22:37	0
1312886	99	31	27,3	cyclictest	1393305	-21	needreboot	20:27:35	1
1312881	99	31	27,3	cyclictest	1271730	-21	kworker/u8:0+flush-8:0	19:22:42	0
1361402	2	30	0,2	sleep1	0	-21	swapper/1	19:57:33	1
1326881	2	30	0,4	sleep1	28	1	rcuc/1	19:22:31	1
1312890	99	30	25,4	cyclictest	1408967	-21	kworker/u8:2+events_unbound	21:12:54	2
1312890	99	30	22,6	cyclictest	1602700	-21	awk	00:00:00	2
1312890	99	30	21,7	cyclictest	1419798	-21	sed	20:57:32	2
1312886	99	30	26,3	cyclictest	1627181	-21	unixbench_multi	00:22:43	1
1312886	99	30	26,3	cyclictest	1595395	-21	kthreadcore	23:52:32	1
1312886	99	30	26,3	cyclictest	1398869	-21	kworker/u8:1+flush-8:0	21:02:28	1
1312886	99	30	25,3	cyclictest	1504490	-21	irqrtprio	22:22:31	1
1312886	99	30	23,5	cyclictest	1433378	-21	unixbench_multi	21:07:43	1
1312886	99	30	18,3	cyclictest	0	-21	swapper/1	23:42:27	1
1312881	99	30	21,3	cyclictest	1349365	-21	kworker/u8:3+events_unbound	19:57:47	0
1312890	99	29	25,3	cyclictest	1567546	-21	kworker/u8:1+events_unbound	00:27:19	2
1312890	99	29	25,3	cyclictest	1163051	-21	kworker/u8:2+events_unbound	20:31:04	2
1312890	99	29	24,4	cyclictest	1453700	-21	kworker/u8:1+events_unbound	21:30:13	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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