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 Sun May 17, 2026 00:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1286121	99	45	42,2	cyclictest	1363686	-21	apt-get	20:25:11	0
1286121	99	45	42,2	cyclictest	1363686	-21	apt-get	20:25:11	0
1286124	99	41	35,4	cyclictest	1332701	-21	/usr/sbin/munin	19:55:15	1
1286121	99	39	36,2	cyclictest	1613359	-21	kworker/u8:3+flush-259:0	00:30:21	0
1286121	99	37	31,4	cyclictest	1378035	-21	ntpq	20:35:20	0
1286127	99	36	34,1	cyclictest	1472014	-21	fwupd	22:07:58	2
1286131	99	35	30,3	cyclictest	1560934	-21	base64	23:35:00	3
1286127	99	35	30,3	cyclictest	1373978	-21	kworker/u8:0+flush-259:0	20:55:18	2
1286124	99	35	31,3	cyclictest	1426054	-21	apt-get	21:25:13	1
1286121	99	34	29,3	cyclictest	1451564	-21	latency_hist	21:50:01	0
1286124	99	33	28,3	cyclictest	1487291	-21	ntpq	22:20:23	1
1286121	99	32	27,3	cyclictest	1597439	-21	latency_hist	00:10:01	0
1286121	99	32	26,5	cyclictest	1440403	-21	ntpq	21:35:22	0
1286127	99	31	27,3	cyclictest	1232914	-21	kworker/u8:1+flush-259:0	19:20:01	2
1286127	99	31	24,5	cyclictest	1305851	-21	ntpq	19:25:22	2
1286121	99	31	28,2	cyclictest	1436111	-21	kworker/u8:3+flush-259:0	22:00:16	0
1286127	99	30	24,4	cyclictest	1307016	-21	apt-get	19:30:25	2
1286121	99	30	27,2	cyclictest	1477396	-21	kworker/u8:2+flush-259:0	23:00:18	0
1286121	99	30	26,3	cyclictest	1472205	-21	latency_hist	22:10:00	0
1286131	99	29	24,3	cyclictest	252	-21	systemd-journal	22:10:57	3
1286131	99	29	22,5	cyclictest	1488968	-21	diskstats	22:25:16	3
1286127	99	29	24,4	cyclictest	1576715	-21	kworker/u8:4+flush-259:0	23:55:17	2
1286121	99	29	26,2	cyclictest	1373978	-21	kworker/u8:0+flush-259:0	20:55:28	0
1286121	99	29	24,4	cyclictest	1347013	-21	ntpq	20:05:21	0
1286127	99	28	23,4	cyclictest	1534980	-21	kworker/u8:1+flush-259:0	00:05:15	2
1286124	99	28	25,3	cyclictest	1477396	-21	kworker/u8:2+flush-259:0	23:00:25	1
1286124	99	28	22,4	cyclictest	252	-21	systemd-journal	00:15:01	1
1286121	99	28	24,3	cyclictest	1410607	-21	apt-get	21:10:12	0
1286131	99	27	21,4	cyclictest	1420649	-21	latency_hist	21:20:01	3
1286124	99	27	23,3	cyclictest	1477396	-21	kworker/u8:2+flush-259:0	22:20:00	1
1286121	99	27	24,2	cyclictest	1352726	-21	kworker/u8:4+flush-259:0	20:30:16	0
1286127	99	26	10,7	cyclictest	1477362	-21	munin-run	22:15:00	2
1286124	99	26	22,3	cyclictest	1363652	-21	kworker/u8:3+flush-259:0	20:50:00	1
1286124	99	26	19,5	cyclictest	1362504	-21	ntpq	20:20:21	1
1286124	99	26	19,5	cyclictest	1342771	-21	latency_hist	20:05:01	1
1286121	99	26	23,2	cyclictest	1436111	-21	kworker/u8:3+flush-259:0	21:40:25	0
1286121	99	26	23,2	cyclictest	1415117	-21	kworker/u8:1+events_unbound	21:25:14	0
1286121	99	26	22,2	cyclictest	1280971	-21	kworker/u8:2+events_unbound	19:40:00	0
1286124	99	25	22,2	cyclictest	1373978	-21	kworker/u8:0+events_unbound	21:45:24	1
1286121	99	25	22,2	cyclictest	1415117	-21	kworker/u8:1+flush-259:0	21:30:59	0
1286121	99	25	22,2	cyclictest	1280971	-21	kworker/u8:2+flush-259:0	19:30:01	0
1286121	99	25	18,5	cyclictest	1508288	-21	ntpq	22:40:22	0
1286131	99	24	20,3	cyclictest	1561468	-21	apt-get	23:35:12	3
1286124	99	24	21,2	cyclictest	1597258	-21	kworker/u8:3+flush-259:0	00:15:16	1
1286124	99	24	18,4	cyclictest	252	-21	systemd-journal	19:42:14	1
1286131	99	23	17,4	cyclictest	1602656	-21	https	00:15:00	3
1286131	99	23	15,6	cyclictest	1483169	-21	cp	22:20:01	3
1286127	99	23	19,3	cyclictest	1519755	-21	apt-get	22:55:12	2
1286127	99	23	18,4	cyclictest	1384382	-21	kworker/u8:2+flush-259:0	21:05:00	2
1286127	99	23	18,3	cyclictest	1363652	-21	kworker/u8:3+flush-259:0	20:50:15	2
1286127	99	23	18,3	cyclictest	1286345	-21	apt-get	19:10:13	2
1286124	99	23	5,8	cyclictest	1394927	-21	latency_hist	20:55:00	1
1286124	99	23	19,3	cyclictest	1613359	-21	kworker/u8:3+events_unbound	00:30:16	1
1286121	99	23	17,4	cyclictest	1482540	-21	apt-get	22:20:00	0
1286131	99	22	7,4	cyclictest	1513383	-21	ntpq	22:45:19	3
1286131	99	22	7,4	cyclictest	1513383	-21	ntpq	22:45:19	3
1286131	99	22	17,3	cyclictest	252	-21	systemd-journal	21:01:57	3
1286131	99	22	15,4	cyclictest	1347934	-21	latency_hist	20:10:01	3
1286127	99	22	15,5	cyclictest	1445515	-21	ntpq	21:40:21	2
1286127	99	22	14,6	cyclictest	1561049	-21	cat	23:35:02	2
1286124	99	22	18,3	cyclictest	1436111	-21	kworker/u8:3+events_unbound	21:40:13	1
1286124	99	22	18,3	cyclictest	1264764	-21	kworker/u8:4+flush-259:0	19:10:25	1
1286124	99	22	16,4	cyclictest	1311874	-21	kworker/u8:1+flush-259:0	19:35:17	1
1286121	99	22	18,3	cyclictest	1456738	-21	kworker/u8:1+flush-259:0	21:55:16	0
1286121	99	22	18,3	cyclictest	1363652	-21	kworker/u8:3+events_unbound	20:45:00	0
1286121	99	22	17,4	cyclictest	1436111	-21	kworker/u8:3+events_unbound	21:50:22	0
1286131	99	21	6,4	cyclictest	1409425	-21	ntpq	21:05:22	3
1286124	99	21	17,3	cyclictest	1498850	-21	kworker/u8:0+flush-259:0	22:40:16	1
1286124	99	21	17,3	cyclictest	1280971	-21	kworker/u8:2+events_unbound	19:15:14	1
1286121	99	21	18,3	cyclictest	1587080	-21	kworker/u8:0+events_unbound	00:15:23	0
1286121	99	21	18,2	cyclictest	1373978	-21	kworker/u8:0+flush-259:0	21:20:21	0
1286121	99	21	17,3	cyclictest	1597258	-21	kworker/u8:3+events_unbound	00:10:13	0
1286121	99	21	17,3	cyclictest	1534980	-21	kworker/u8:1+events_unbound	00:30:00	0
1286121	99	21	17,3	cyclictest	1456738	-21	kworker/u8:1+flush-259:0	22:30:24	0
1286131	99	20	4,4	cyclictest	1534036	-21	ntpq	23:05:19	3
1286131	99	20	15,3	cyclictest	1410582	-21	/usr/sbin/munin	21:10:23	3
1286131	99	20	14,4	cyclictest	1623952	-21	apt-get	00:35:11	3
1286127	99	20	17,2	cyclictest	0	-21	swapper/2	22:05:00	2
1286124	99	20	17,2	cyclictest	1477396	-21	kworker/u8:2+flush-259:0	22:35:15	1
1286124	99	20	15,4	cyclictest	1321179	-21	kworker/u8:0+events_unbound	19:45:22	1
1286124	99	20	15,3	cyclictest	252	-21	systemd-journal	23:12:41	1
1286124	99	20	15,3	cyclictest	1327204	-21	kworker/u8:2+flush-259:0	20:10:22	1
1286121	99	20	17,2	cyclictest	1327204	-21	kworker/u8:2+events_unbound	20:12:18	0
1286121	99	20	16,3	cyclictest	1509181	-21	kworker/u8:1+flush-259:0	22:55:20	0
1286121	99	20	16,3	cyclictest	1	-21	systemd	00:00:01	0
1286131	99	19	5,11	cyclictest	1394923	-21	latency_hist	20:55:01	3
1286127	99	19	16,2	cyclictest	1602881	-21	latency_hist	00:15:00	2
1286127	99	19	16,2	cyclictest	1550449	-21	cron	23:25:00	2
1286124	99	19	16,2	cyclictest	1373978	-21	kworker/u8:0+flush-259:0	21:35:00	1
1286124	99	19	15,3	cyclictest	1477396	-21	kworker/u8:2+flush-259:0	23:43:57	1
1286124	99	19	15,3	cyclictest	1352726	-21	kworker/u8:4+events_unbound	20:15:21	1
1286124	99	19	14,3	cyclictest	1472465	-21	apt-get	22:10:11	1
1286121	99	19	16,2	cyclictest	1327204	-21	kworker/u8:2+flush-259:0	20:00:16	0
1286121	99	19	15,3	cyclictest	1587080	-21	kworker/u8:0+events_unbound	00:20:22	0
1286121	99	19	15,3	cyclictest	1311874	-21	kworker/u8:1+events_unbound	19:44:58	0
1286127	99	18	14,3	cyclictest	1581901	-21	turbostat.cron	23:55:00	2
1286127	99	18	14,3	cyclictest	1405439	-21	/usr/sbin/munin	21:05:16	2
1286127	99	18	13,3	cyclictest	1327537	-21	/usr/sbin/munin	19:50:15	2
1286127	99	18	12,4	cyclictest	1514551	-21	/usr/sbin/munin	22:50:24	2
1286127	99	18	10,6	cyclictest	1575823	-21	ntpq	23:45:22	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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