OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackeslot4s.osadl.org (updated Sat Mar 14, 2026 12:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1515255	99	42	33,2	cyclictest	1826339	-21	kworker/u8:4+events_unbound	12:25:21	2
1515255	99	40	37,2	cyclictest	1455979	-21	kworker/u8:3+events_unbound	07:10:15	2
1515255	99	39	34,3	cyclictest	1515177	-21	latency_hist	07:10:00	2
1515255	99	38	35,2	cyclictest	1826339	-21	kworker/u8:4+flush-259:0	12:10:21	2
1515255	99	38	35,2	cyclictest	1659863	-21	kworker/u8:2+events_unbound	10:00:00	2
1515255	99	38	32,4	cyclictest	1732883	-21	latency_hist	10:40:01	2
1515250	99	38	32,3	cyclictest	1805114	-21	latency_hist	11:50:00	0
1515255	99	37	34,2	cyclictest	1644359	-21	kworker/u8:0+flush-259:0	09:20:23	2
1515255	99	37	32,3	cyclictest	1546104	-21	apt-get	07:40:02	2
1515255	99	36	33,2	cyclictest	1659863	-21	kworker/u8:2+events_unbound	10:25:14	2
1515255	99	35	32,2	cyclictest	1711661	-21	kworker/u8:1+events_unbound	10:55:18	2
1515255	99	35	32,2	cyclictest	1520383	-21	kworker/u8:0+events_unbound	07:20:18	2
1515255	99	34	31,3	cyclictest	1711661	-21	kworker/u8:1+flush-259:0	10:45:16	2
1515255	99	34	31,2	cyclictest	1789695	-21	kworker/u8:2+events_unbound	11:40:19	2
1515255	99	34	31,2	cyclictest	1618552	-21	kworker/u8:4+flush-259:0	09:05:19	2
1515250	99	34	30,3	cyclictest	1618552	-21	kworker/u8:4+flush-259:0	09:05:24	0
1515255	99	33	30,2	cyclictest	1799992	-21	kworker/u8:3+events_unbound	11:50:16	2
1515255	99	33	29,3	cyclictest	1530645	-21	kworker/u8:2+events_unbound	07:30:23	2
1515255	99	33	25,5	cyclictest	1717052	-21	latency_hist	10:25:01	2
1515250	99	33	29,3	cyclictest	1530645	-21	kworker/u8:2+flush-259:0	07:30:00	0
1515255	99	32	28,3	cyclictest	1799992	-21	kworker/u8:3+flush-259:0	12:05:16	2
1515252	99	32	27,4	cyclictest	1711661	-21	kworker/u8:1+flush-259:0	11:30:15	1
1515255	99	31	28,2	cyclictest	1613388	-21	kworker/u8:2+events_unbound	08:55:19	2
1515255	99	31	27,3	cyclictest	1815401	-21	kworker/u8:0+events_unbound	12:15:13	2
1515255	99	31	27,3	cyclictest	1711661	-21	kworker/u8:1+events_unbound	11:25:17	2
1515250	99	31	26,4	cyclictest	1764167	-21	apt-get	11:10:11	0
1515255	99	30	28,2	cyclictest	1799992	-21	kworker/u8:3+events_unbound	11:55:12	2
1515255	99	30	28,2	cyclictest	1799992	-21	kworker/u8:3+events_unbound	11:55:11	2
1515255	99	30	28,2	cyclictest	1732906	-21	kworker/u8:3+events_unbound	11:15:23	2
1515255	99	30	27,2	cyclictest	1520383	-21	kworker/u8:0+events_unbound	08:15:00	2
1515255	99	30	27,2	cyclictest	1520383	-21	kworker/u8:0+events_unbound	07:25:19	2
1515252	99	30	26,3	cyclictest	1795073	-21	apt-get	11:40:12	1
1515255	99	29	25,3	cyclictest	1540983	-21	kworker/u8:3+events_unbound	07:45:14	2
1515252	99	29	24,4	cyclictest	1525744	-21	/usr/sbin/munin	07:20:14	1
1515252	99	29	23,4	cyclictest	1712148	-21	/usr/sbin/munin	10:20:14	1
1515255	99	28	25,2	cyclictest	1644359	-21	kworker/u8:0+events_unbound	10:15:20	2
1515255	99	28	24,3	cyclictest	1675779	-21	kworker/u8:3+events_unbound	10:05:18	2
1515255	99	28	24,3	cyclictest	1644359	-21	kworker/u8:0+events_unbound	09:40:15	2
1515255	99	28	24,3	cyclictest	1540983	-21	kworker/u8:3+events_unbound	07:50:14	2
1515252	99	28	21,5	cyclictest	1727770	-21	latency_hist	10:35:01	1
1515250	99	28	21,5	cyclictest	1613366	-21	latency_hist	08:45:01	0
1515260	99	27	23,2	cyclictest	1659863	-21	kworker/u8:2+flush-259:0	10:35:00	3
1515255	99	27	24,2	cyclictest	1711661	-21	kworker/u8:1+flush-259:0	11:10:22	2
1515255	99	27	24,2	cyclictest	1572259	-21	kworker/u8:1+events_unbound	08:15:22	2
1515250	99	27	23,3	cyclictest	1815649	-21	apt-get	12:00:13	0
1515250	99	27	22,3	cyclictest	1593058	-21	apt-get	08:25:11	0
1515255	99	26	23,2	cyclictest	1618552	-21	kworker/u8:4+events_unbound	09:10:22	2
1515252	99	26	20,5	cyclictest	1658908	-21	ntpq	09:25:20	1
1515252	99	26	19,5	cyclictest	1670596	-21	latency_hist	09:40:01	1
1515252	99	26	19,5	cyclictest	1670596	-21	latency_hist	09:40:00	1
1515260	99	25	21,2	cyclictest	1836746	-21	apt-get	12:20:12	3
1515260	99	25	20,4	cyclictest	1659823	-21	apt-get	09:30:01	3
1515260	99	25	18,5	cyclictest	252	-21	systemd-journal	08:40:20	3
1515255	99	25	22,2	cyclictest	1711661	-21	kworker/u8:1+flush-259:0	11:20:24	2
1515255	99	25	22,2	cyclictest	1711661	-21	kworker/u8:1+events_unbound	11:30:14	2
1515255	99	25	22,2	cyclictest	1618552	-21	kworker/u8:4+events_unbound	09:25:14	2
1515255	99	25	22,2	cyclictest	1520383	-21	kworker/u8:0+flush-259:0	08:00:00	2
1515250	99	25	20,4	cyclictest	1825801	-21	gpgv	12:10:00	0
1515260	99	24	19,4	cyclictest	1676179	-21	diskstats	09:45:12	3
1515260	99	24	18,4	cyclictest	252	-21	systemd-journal	07:35:00	3
1515260	99	24	18,4	cyclictest	1836484	-21	latency_hist	12:20:00	3
1515255	99	24	21,2	cyclictest	1582538	-21	kworker/u8:2+flush-259:0	08:20:25	2
1515252	99	24	19,3	cyclictest	1567094	-21	latency_hist	08:00:01	1
1515250	99	24	19,4	cyclictest	1540983	-21	kworker/u8:3+flush-259:0	07:45:20	0
1515250	99	24	18,4	cyclictest	1815386	-21	latency_hist	12:00:01	0
1515250	99	24	18,4	cyclictest	1815386	-21	latency_hist	12:00:01	0
1515255	99	23	20,2	cyclictest	1494445	-21	kworker/u8:1+events_unbound	07:15:14	2
1515250	99	23	20,2	cyclictest	1826339	-21	kworker/u8:4+events_unbound	12:25:18	0
1515250	99	23	20,2	cyclictest	1711661	-21	kworker/u8:1+events_unbound	10:40:20	0
1515250	99	23	19,3	cyclictest	1520383	-21	kworker/u8:0+events_unbound	08:10:14	0
1515250	99	23	18,4	cyclictest	252	-21	systemd-journal	07:55:00	0
1515260	99	22	18,3	cyclictest	1540983	-21	kworker/u8:3+flush-259:0	08:25:21	3
1515260	99	22	17,3	cyclictest	1748019	-40	mandb	10:51:20	3
1515255	99	22	18,3	cyclictest	1711661	-21	kworker/u8:1+flush-259:0	10:51:23	2
1515255	99	22	18,3	cyclictest	1711661	-21	kworker/u8:1+events_unbound	10:40:13	2
1515255	99	22	16,4	cyclictest	1773912	-21	kworker/u8:0+flush-259:0	11:35:24	2
1515252	99	22	17,4	cyclictest	1711661	-21	kworker/u8:1+flush-259:0	10:50:24	1
1515252	99	22	17,4	cyclictest	1659863	-21	kworker/u8:2+flush-259:0	10:10:14	1
1515250	99	22	18,3	cyclictest	1789695	-21	kworker/u8:2+flush-259:0	11:40:20	0
1515250	99	22	17,3	cyclictest	1515466	-21	apt-get	07:10:11	0
1515260	99	21	18,2	cyclictest	1540983	-21	kworker/u8:3+flush-259:0	08:05:00	3
1515260	99	21	17,3	cyclictest	1634240	-21	kworker/u8:1+flush-259:0	09:15:00	3
1515260	99	21	17,3	cyclictest	1582538	-21	kworker/u8:2+events_unbound	08:20:22	3
1515255	99	21	18,2	cyclictest	1540983	-21	kworker/u8:3+flush-259:0	08:00:22	2
1515255	99	21	18,2	cyclictest	1540983	-21	kworker/u8:3+events_unbound	08:30:24	2
1515252	99	21	15,4	cyclictest	1701605	-21	latency_hist	10:10:01	1
1515250	99	21	18,2	cyclictest	1659863	-21	kworker/u8:2+events_unbound	10:30:23	0
1515260	99	20	17,2	cyclictest	1704171	-21	kthreadcore	10:10:15	3
1515260	99	20	16,3	cyclictest	1613388	-21	kworker/u8:2+flush-259:0	08:45:18	3
1515255	99	20	17,2	cyclictest	1815401	-21	kworker/u8:0+events_unbound	12:20:14	2
1515255	99	20	17,2	cyclictest	1659863	-21	kworker/u8:2+events_unbound	10:30:19	2
1515255	99	20	17,2	cyclictest	1644359	-21	kworker/u8:0+events_unbound	09:35:19	2
1515255	99	20	17,2	cyclictest	1644359	-21	kworker/u8:0+events_unbound	09:35:18	2
1515255	99	20	17,2	cyclictest	1598170	-21	kworker/u8:1+flush-259:0	08:35:19	2
1515252	99	20	16,3	cyclictest	1820519	-21	cron	12:05:00	1
1515252	99	20	16,3	cyclictest	1541209	-21	apt-get	07:35:13	1
1515252	99	20	16,2	cyclictest	0	-21	swapper/1	11:00:20	1
1515252	99	20	13,5	cyclictest	252	-21	systemd-journal	09:55:01	1
1515250	99	20	17,2	cyclictest	1530645	-21	kworker/u8:2+flush-259:0	07:30:17	0
1515250	99	20	16,3	cyclictest	1732906	-21	kworker/u8:3+flush-259:0	11:00:01	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2021-09-01 - 00:34