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 Thu Apr 09, 2026 00:44:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1272267	99	41	38,2	cyclictest	1340414	-21	kworker/u8:3+events_unbound	20:15:16	0
1272269	99	36	30,4	cyclictest	1308713	-21	ntpq	19:40:20	1
1272267	99	36	29,5	cyclictest	1297985	-21	ntpq	19:30:20	0
1272267	99	36	0,34	cyclictest	1	-21	systemd	21:55:00	0
1272267	99	35	31,3	cyclictest	1371307	-21	kworker/u8:0+flush-259:0	20:50:00	0
1272273	99	34	29,3	cyclictest	1548175	-21	latency_hist	23:35:00	2
1272273	99	34	28,4	cyclictest	1427208	-21	ntpq	21:35:18	2
1272273	99	33	27,4	cyclictest	1278228	-21	diskstats	19:15:12	2
1272277	99	32	29,2	cyclictest	1288368	-21	kworker/u8:2+flush-259:0	19:35:17	3
1272273	99	32	29,2	cyclictest	1288368	-21	kworker/u8:2+flush-259:0	19:40:17	2
1272267	99	32	28,3	cyclictest	1355354	-21	kworker/u8:4+events_unbound	22:15:01	0
1272267	99	32	27,4	cyclictest	1282980	-21	latency_hist	19:20:01	0
1272267	99	32	26,5	cyclictest	252	-21	systemd-journal	00:20:00	0
1272277	99	31	28,2	cyclictest	1537509	-21	gpgv	23:25:01	3
1272277	99	31	28,2	cyclictest	1537509	-21	gpgv	23:25:00	3
1272277	99	30	26,3	cyclictest	252	-21	systemd-journal	21:25:00	3
1272273	99	30	26,3	cyclictest	252	-21	systemd-journal	00:00:37	2
1272269	99	30	26,3	cyclictest	1511990	-21	apt-get	23:00:13	1
1272267	99	30	27,2	cyclictest	1454879	-21	kworker/u8:0+events_unbound	22:05:16	0
1272267	99	30	27,2	cyclictest	1251412	-21	kworker/u8:4+flush-259:0	19:50:01	0
1272277	99	29	23,4	cyclictest	252	-21	systemd-journal	00:08:39	3
1272273	99	29	26,2	cyclictest	1443923	-21	kworker/u8:3+events_unbound	22:00:14	2
1272273	99	29	26,2	cyclictest	1251412	-21	kworker/u8:4+events_unbound	19:10:01	2
1272267	99	29	26,2	cyclictest	3281578	-21	kworker/u8:0+flush-259:0	19:55:24	0
1272267	99	29	24,3	cyclictest	1355354	-21	kworker/u8:4+flush-259:0	20:55:16	0
1272277	99	28	25,2	cyclictest	1355354	-21	kworker/u8:4+flush-259:0	22:30:21	3
1272273	99	28	25,2	cyclictest	1553388	-21	kworker/u8:1+events_unbound	23:40:11	2
1272273	99	28	24,3	cyclictest	1324706	-21	kworker/u8:2+flush-259:0	20:10:16	2
1272269	99	28	22,4	cyclictest	1543066	-21	kworker/u8:0+flush-259:0	00:00:25	1
1272267	99	28	25,2	cyclictest	1464818	-21	kworker/u8:1+events_unbound	22:25:20	0
1272267	99	28	21,5	cyclictest	1604055	-21	ntpq	00:25:23	0
1272273	99	27	24,2	cyclictest	1397069	-21	kworker/u8:1+flush-259:0	21:30:23	2
1272273	99	27	24,2	cyclictest	1355354	-21	kworker/u8:4+flush-259:0	21:05:00	2
1272267	99	27	22,4	cyclictest	1345816	-21	apt-get	20:20:10	0
1272277	99	26	22,3	cyclictest	1459817	-21	latency_hist	22:10:01	3
1272277	99	26	19,5	cyclictest	1277568	-21	cp	19:15:01	3
1272273	99	26	23,3	cyclictest	1288368	-21	kworker/u8:2+events_unbound	19:25:24	2
1272273	99	26	23,2	cyclictest	1496539	-21	kworker/u8:3+flush-259:0	22:55:25	2
1272273	99	26	23,2	cyclictest	1475487	-21	kworker/u8:2+flush-259:0	23:45:24	2
1272273	99	26	23,2	cyclictest	1314353	-21	kworker/u8:1+flush-259:0	20:10:01	2
1272273	99	26	22,3	cyclictest	1475523	-21	apt-get	22:25:13	2
1272273	99	26	22,3	cyclictest	1475487	-21	kworker/u8:2+flush-259:0	23:35:24	2
1272273	99	26	22,3	cyclictest	1475487	-21	kworker/u8:2+flush-259:0	23:35:23	2
1272273	99	26	22,3	cyclictest	1412532	-21	latency_hist	21:25:01	2
1272269	99	26	22,3	cyclictest	1485846	-21	apt-get	22:35:11	1
1272277	99	25	22,2	cyclictest	1371307	-21	kworker/u8:0+flush-259:0	21:10:26	3
1272277	99	25	21,3	cyclictest	1355354	-21	kworker/u8:4+flush-259:0	20:50:24	3
1272277	99	25	20,3	cyclictest	1433639	-21	gpgv	21:45:01	3
1272277	99	25	19,4	cyclictest	1573977	-21	cp	00:00:00	3
1272277	99	25	17,7	cyclictest	1599737	-21	kworker/u8:0+events_unbound	00:25:01	3
1272273	99	25	22,2	cyclictest	1496539	-21	kworker/u8:3+flush-259:0	23:25:23	2
1272273	99	25	22,2	cyclictest	1496539	-21	kworker/u8:3+flush-259:0	22:50:17	2
1272273	99	25	22,2	cyclictest	1454879	-21	kworker/u8:0+flush-259:0	22:05:22	2
1272269	99	25	21,3	cyclictest	1324706	-21	kworker/u8:2+flush-259:0	20:10:25	1
1272269	99	25	20,3	cyclictest	1569080	-21	apt-get	23:55:10	1
1272267	99	25	21,3	cyclictest	1355354	-21	kworker/u8:4+events_unbound	21:00:22	0
1272267	99	25	20,4	cyclictest	1558504	-21	latency_hist	23:45:00	0
1272277	99	24	20,2	cyclictest	211	-21	jbd2/nvme0n1p2-8	20:20:28	3
1272273	99	24	18,4	cyclictest	1344653	-21	ntpq	20:15:20	2
1272269	99	24	21,2	cyclictest	1314353	-21	kworker/u8:1+flush-259:0	20:25:00	1
1272269	99	24	20,3	cyclictest	1496539	-21	kworker/u8:3+flush-259:0	23:15:23	1
1272267	99	24	21,2	cyclictest	1282835	-21	kworker/u8:1+events_unbound	19:20:14	0
1272267	99	24	18,4	cyclictest	252	-21	systemd-journal	22:42:28	0
1272267	99	24	18,4	cyclictest	1568822	-21	latency_hist	23:55:00	0
1272277	99	23	19,3	cyclictest	1387038	-21	apt-get	21:00:11	3
1272273	99	23	20,2	cyclictest	1314353	-21	kworker/u8:1+events_unbound	19:50:22	2
1272269	99	23	19,3	cyclictest	1543066	-21	kworker/u8:0+flush-259:0	00:05:24	1
1272267	99	23	20,2	cyclictest	1599737	-21	kworker/u8:0+flush-259:0	00:35:24	0
1272267	99	23	19,3	cyclictest	1251412	-21	kworker/u8:4+flush-259:0	19:10:16	0
1272267	99	23	19,2	cyclictest	3281578	-21	kworker/u8:0+flush-259:0	19:40:22	0
1272277	99	22	19,2	cyclictest	1314353	-21	kworker/u8:1+flush-259:0	20:05:26	3
1272277	99	22	18,3	cyclictest	252	-21	systemd-journal	21:00:00	3
1272273	99	22	19,2	cyclictest	1584078	-21	kworker/u8:3+flush-259:0	00:30:24	2
1272273	99	22	19,2	cyclictest	1475487	-21	kworker/u8:2+flush-259:0	23:20:24	2
1272273	99	22	19,2	cyclictest	1475487	-21	kworker/u8:2+flush-259:0	23:20:24	2
1272273	99	22	19,2	cyclictest	1397069	-21	kworker/u8:1+flush-259:0	21:45:22	2
1272273	99	22	19,2	cyclictest	1288368	-21	kworker/u8:2+events_unbound	19:45:16	2
1272273	99	22	19,2	cyclictest	1282835	-21	kworker/u8:1+flush-259:0	19:20:22	2
1272273	99	22	18,3	cyclictest	252	-21	systemd-journal	20:50:02	2
1272273	99	22	18,3	cyclictest	1553388	-21	kworker/u8:1+events_unbound	00:24:38	2
1272269	99	22	18,3	cyclictest	1584078	-21	kworker/u8:3+flush-259:0	00:10:23	1
1272267	99	22	19,3	cyclictest	1355354	-21	kworker/u8:4+events_unbound	22:30:24	0
1272267	99	22	19,2	cyclictest	1584078	-21	kworker/u8:3+events_unbound	00:10:22	0
1272267	99	22	19,2	cyclictest	1475487	-21	kworker/u8:2+events_unbound	23:20:26	0
1272267	99	22	19,2	cyclictest	1475487	-21	kworker/u8:2+events_unbound	23:20:26	0
1272267	99	22	19,2	cyclictest	1314353	-21	kworker/u8:1+events_unbound	19:50:12	0
1272267	99	22	18,3	cyclictest	1464818	-21	kworker/u8:1+events_unbound	22:36:29	0
1272267	99	22	18,3	cyclictest	1371307	-21	kworker/u8:0+events_unbound	21:35:24	0
1272277	99	21	19,1	cyclictest	3281578	-21	kworker/u8:0+flush-259:0	19:45:25	3
1272273	99	21	18,2	cyclictest	1599737	-21	kworker/u8:0+flush-259:0	00:35:12	2
1272273	99	21	18,2	cyclictest	1563649	-21	kworker/u8:3+events_unbound	23:50:17	2
1272273	99	21	18,2	cyclictest	1496539	-21	kworker/u8:3+flush-259:0	23:30:21	2
1272269	99	21	17,2	cyclictest	1563649	-21	kworker/u8:3+flush-259:0	23:50:15	1
1272269	99	21	15,4	cyclictest	252	-21	systemd-journal	19:19:26	1
1272267	99	21	18,2	cyclictest	1496539	-21	kworker/u8:3+events_unbound	23:30:18	0
1272267	99	21	18,2	cyclictest	1496539	-21	kworker/u8:3+events_unbound	23:30:18	0
1272267	99	21	18,2	cyclictest	1397069	-21	kworker/u8:1+flush-259:0	21:45:17	0
1272267	99	21	16,4	cyclictest	509	-21	rs:main		0
1272277	99	20	17,2	cyclictest	1464818	-21	kworker/u8:1+flush-259:0	22:25:26	3
1272273	99	20	16,3	cyclictest	1454879	-21	kworker/u8:0+events_unbound	22:10:12	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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