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 Fri Jan 09, 2026 12:44:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1538257	99	45	41,3	cyclictest	1786016	-21	kworker/u8:4+flush-259:0	11:55:23	3
1538257	99	44	39,3	cyclictest	1479103	-21	kworker/u8:2+events_unbound	09:05:23	3
1538257	99	42	39,2	cyclictest	1827982	-21	kworker/u8:1+events_unbound	12:05:22	3
1538257	99	42	39,2	cyclictest	1677484	-21	kworker/u8:3+events_unbound	11:15:14	3
1538257	99	41	37,3	cyclictest	1677484	-21	kworker/u8:3+events_unbound	11:00:17	3
1538257	99	40	37,2	cyclictest	1786016	-21	kworker/u8:4+events_unbound	12:10:20	3
1538257	99	40	37,2	cyclictest	1786016	-21	kworker/u8:4+events_unbound	11:30:20	3
1538257	99	40	36,2	cyclictest	1485339	-21	kworker/u8:4+events_unbound	07:45:21	3
1538244	99	40	34,4	cyclictest	1833143	-21	latency_hist	11:55:00	0
1538257	99	39	36,2	cyclictest	1656926	-21	kworker/u8:1+events_unbound	09:40:21	3
1538257	99	38	35,2	cyclictest	1677484	-21	kworker/u8:3+events_unbound	10:35:13	3
1538257	99	38	34,3	cyclictest	1485339	-21	kworker/u8:4+events_unbound	08:15:21	3
1538257	99	38	34,3	cyclictest	1485339	-21	kworker/u8:4+events_unbound	07:40:22	3
1538257	99	38	32,4	cyclictest	1652001	-21	/usr/sbin/munin	09:00:21	3
1538245	99	38	33,3	cyclictest	1631192	-21	latency_hist	08:40:00	1
1538244	99	38	34,3	cyclictest	1677484	-21	kworker/u8:3+flush-259:0	11:00:15	0
1538244	99	38	32,4	cyclictest	1722887	-21	ntpq	10:05:33	0
1538244	99	38	32,4	cyclictest	1564163	-21	apt-get	07:35:11	0
1538257	99	37	33,3	cyclictest	1713523	-21	kworker/u8:0+events_unbound	10:20:00	3
1538257	99	37	32,4	cyclictest	1479103	-21	kworker/u8:2+flush-259:0	07:55:25	3
1538257	99	37	32,4	cyclictest	1479103	-21	kworker/u8:2+events_unbound	08:45:23	3
1538244	99	37	32,3	cyclictest	1713523	-21	kworker/u8:0+flush-259:0	10:35:15	0
1538257	99	36	33,2	cyclictest	1786016	-21	kworker/u8:4+flush-259:0	11:35:20	3
1538257	99	36	32,3	cyclictest	1485339	-21	kworker/u8:4+events_unbound	08:25:13	3
1538257	99	36	32,3	cyclictest	1485339	-21	kworker/u8:4+events_unbound	07:25:23	3
1538257	99	36	32,3	cyclictest	1479103	-21	kworker/u8:2+flush-259:0	09:10:15	3
1538257	99	36	31,3	cyclictest	1677484	-21	kworker/u8:3+events_unbound	11:10:22	3
1538251	99	35	31,3	cyclictest	1479103	-21	kworker/u8:2+flush-259:0	09:00:20	2
1538251	99	35	30,3	cyclictest	1479103	-21	kworker/u8:2+flush-259:0	07:35:16	2
1538245	99	35	31,2	cyclictest	1615590	-21	/usr/sbin/munin	08:25:14	1
1538257	99	34	31,2	cyclictest	1713523	-21	kworker/u8:0+events_unbound	10:20:14	3
1538257	99	34	30,3	cyclictest	1479103	-21	kworker/u8:2+events_unbound	07:20:19	3
1538257	99	34	30,2	cyclictest	1827982	-21	kworker/u8:1+events_unbound	12:20:21	3
1538257	99	34	29,4	cyclictest	1786016	-21	kworker/u8:4+flush-259:0	11:40:24	3
1538245	99	34	28,4	cyclictest	1863942	-21	ntpq	12:20:21	1
1538257	99	33	30,2	cyclictest	1677484	-21	kworker/u8:3+flush-259:0	09:45:17	3
1538257	99	33	30,2	cyclictest	1479103	-21	kworker/u8:2+events_unbound	08:05:18	3
1538257	99	33	29,3	cyclictest	1755117	-21	kworker/u8:2+flush-259:0	10:50:15	3
1538257	99	33	29,3	cyclictest	1744366	-21	kworker/u8:1+flush-259:0	10:55:16	3
1538257	99	33	29,3	cyclictest	1479103	-21	kworker/u8:2+events_unbound	08:35:12	3
1538251	99	33	28,4	cyclictest	1538457	-21	/usr/sbin/munin	07:10:14	2
1538244	99	33	29,3	cyclictest	1485339	-21	kworker/u8:4+flush-259:0	08:00:16	0
1538244	99	33	27,4	cyclictest	1837424	-21	ntpq	11:55:22	0
1538244	99	33	27,4	cyclictest	1702415	-21	ntpq	09:45:19	0
1538257	99	32	29,2	cyclictest	1677484	-21	kworker/u8:3+flush-259:0	10:10:22	3
1538257	99	32	29,2	cyclictest	1485339	-21	kworker/u8:4+events_unbound	07:15:22	3
1538257	99	32	28,3	cyclictest	1677484	-21	kworker/u8:3+events_unbound	11:20:13	3
1538257	99	32	28,3	cyclictest	1485339	-21	kworker/u8:4+flush-259:0	08:10:23	3
1538257	99	32	28,3	cyclictest	1479103	-21	kworker/u8:2+events_unbound	07:35:20	3
1538245	99	32	26,4	cyclictest	1598992	-21	ntpq	08:05:18	1
1538257	99	31	28,2	cyclictest	1479103	-21	kworker/u8:2+flush-259:0	09:25:16	3
1538257	99	31	27,3	cyclictest	1677484	-21	kworker/u8:3+events_unbound	10:00:13	3
1538257	99	30	27,2	cyclictest	1479103	-21	kworker/u8:2+flush-259:0	08:20:19	3
1538257	99	30	27,2	cyclictest	1479103	-21	kworker/u8:2+events_unbound	08:30:16	3
1538257	99	30	26,3	cyclictest	1677484	-21	kworker/u8:3+flush-259:0	09:35:18	3
1538251	99	30	26,3	cyclictest	252	-21	systemd-journal	07:40:54	2
1538257	99	29	26,2	cyclictest	1786016	-21	kworker/u8:4+events_unbound	11:50:23	3
1538257	99	29	26,2	cyclictest	1677484	-21	kworker/u8:3+events_unbound	11:25:17	3
1538257	99	29	26,2	cyclictest	1485339	-21	kworker/u8:4+flush-259:0	07:30:17	3
1538257	99	29	25,3	cyclictest	1677484	-21	kworker/u8:3+events_unbound	10:05:31	3
1538257	99	29	24,3	cyclictest	1631452	-21	apt-get	08:40:11	3
1538251	99	29	26,2	cyclictest	1786016	-21	kworker/u8:4+flush-259:0	12:00:27	2
1538245	99	29	25,2	cyclictest	1713523	-21	kworker/u8:0+flush-259:0	10:40:16	1
1538257	99	28	25,2	cyclictest	1786016	-21	kworker/u8:4+events_unbound	12:30:14	3
1538257	99	28	25,2	cyclictest	1786016	-21	kworker/u8:4+events_unbound	12:30:14	3
1538257	99	28	24,3	cyclictest	1703289	-21	kworker/u8:2+flush-259:0	09:55:19	3
1538257	99	28	24,3	cyclictest	1677484	-21	kworker/u8:3+flush-259:0	10:29:24	3
1538257	99	28	24,3	cyclictest	1479103	-21	kworker/u8:2+flush-259:0	07:10:19	3
1538251	99	28	22,4	cyclictest	1626023	-21	latency_hist	08:35:00	2
1538245	99	28	24,3	cyclictest	1672585	-21	apt-get	09:20:11	1
1538244	99	28	25,2	cyclictest	1485339	-21	kworker/u8:4+events_unbound	07:15:13	0
1538257	99	27	24,2	cyclictest	1827982	-21	kworker/u8:1+events_unbound	12:39:55	3
1538257	99	27	24,2	cyclictest	1827982	-21	kworker/u8:1+events_unbound	12:39:54	3
1538257	99	27	20,3	cyclictest	1656926	-21	kworker/u8:1+events_unbound	09:15:13	3
1538251	99	27	23,3	cyclictest	1749531	-21	gpgv	10:35:00	2
1538251	99	27	23,2	cyclictest	1479103	-21	kworker/u8:2+events_unbound	07:45:17	2
1538251	99	27	22,3	cyclictest	1713735	-21	/usr/sbin/munin	10:00:12	2
1538251	99	27	22,3	cyclictest	1677700	-21	/usr/sbin/munin	09:25:16	2
1538245	99	27	22,4	cyclictest	1703480	-21	/usr/sbin/munin	09:50:14	1
1538245	99	27	21,4	cyclictest	1859709	-21	latency_hist	12:20:00	1
1538245	99	26	21,4	cyclictest	1594748	-21	latency_hist	08:05:01	1
1538244	99	26	21,3	cyclictest	1812967	-21	diskstats	11:35:11	0
1538257	99	25	22,2	cyclictest	1485339	-21	kworker/u8:4+events_unbound	07:54:55	3
1538257	99	25	20,3	cyclictest	1703289	-21	kworker/u8:2+events_unbound	09:50:14	3
1538251	99	25	22,2	cyclictest	1755117	-21	kworker/u8:2+flush-259:0	11:05:16	2
1538245	99	25	22,2	cyclictest	1786016	-21	kworker/u8:4+flush-259:0	11:45:01	1
1538245	99	25	22,2	cyclictest	1485339	-21	kworker/u8:4+events_unbound	08:30:14	1
1538245	99	25	21,2	cyclictest	1479103	-21	kworker/u8:2+flush-259:0	09:10:17	1
1538244	99	25	22,2	cyclictest	1755117	-21	kworker/u8:2+events_unbound	10:50:23	0
1538244	99	25	22,2	cyclictest	1667443	-21	apt-get	09:15:10	0
1538244	99	25	21,3	cyclictest	1713523	-21	kworker/u8:0+events_unbound	10:30:24	0
1538257	99	24	21,3	cyclictest	1485339	-21	kworker/u8:4+events_unbound	08:53:49	3
1538257	99	24	17,5	cyclictest	1843438	-21	apt-get	12:05:01	3
1538251	99	24	21,2	cyclictest	1827982	-21	kworker/u8:1+events_unbound	12:15:21	2
1538251	99	24	21,2	cyclictest	1677484	-21	kworker/u8:3+flush-259:0	11:10:15	2
1538251	99	24	21,2	cyclictest	1485339	-21	kworker/u8:4+flush-259:0	07:30:16	2
1538245	99	24	21,2	cyclictest	1656926	-21	kworker/u8:1+events_unbound	09:15:12	1
1538245	99	24	21,2	cyclictest	1479103	-21	kworker/u8:2+flush-259:0	08:55:16	1
1538245	99	24	21,2	cyclictest	1479103	-21	kworker/u8:2+events_unbound	07:10:22	1
1538245	99	24	19,4	cyclictest	1795839	-21	ntpq	11:15:22	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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