OSADL QA Farm on Real-time of Mainline Linux

About - Hardware - CPUs - Benchmarks - Graphics - Benchmarks - Kernels - Boards/Distros - Latency monitoring - Latency plots - System data - Profiles - Compare - Awards

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 Jan 24, 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
4007476	99	42	36,4	cyclictest	4122965	-21	latency_hist	21:00:00	0
4007483	99	40	32,6	cyclictest	73623	-21	latency_hist	23:20:01	3
4007481	99	39	34,3	cyclictest	4065166	-21	cp	20:05:02	2
4007476	99	39	36,2	cyclictest	4044644	-21	apt-get	19:45:11	0
4007476	99	39	34,3	cyclictest	4091688	-21	kworker/u8:2+flush-259:0	20:30:15	0
4007476	99	39	33,4	cyclictest	252	-21	systemd-journal	23:25:00	0
4007483	99	38	32,4	cyclictest	4112648	-21	latency_hist	20:50:01	3
4007481	99	38	32,4	cyclictest	4076342	-21	base64	20:15:02	2
4007481	99	38	31,5	cyclictest	130861	-21	latency_hist	00:15:00	2
4007483	99	37	30,5	cyclictest	252	-21	systemd-journal	22:30:01	3
4007481	99	37	32,3	cyclictest	84616	-21	/usr/sbin/munin	23:30:14	2
4007481	99	36	32,3	cyclictest	53100	-21	kworker/u8:0+flush-259:0	23:40:21	2
4007481	99	36	32,3	cyclictest	53100	-21	kworker/u8:0+flush-259:0	23:40:21	2
4007481	99	36	32,2	cyclictest	4117830	-21	kworker/u8:2+flush-259:0	22:00:20	2
4007481	99	36	28,5	cyclictest	94679	-21	latency_hist	23:40:00	2
4007483	99	35	29,4	cyclictest	27607	-21	apt-get	22:35:10	3
4007483	99	35	28,5	cyclictest	136003	-21	latency_hist	00:20:01	3
4007481	99	35	29,4	cyclictest	4112881	-21	/usr/sbin/munin	20:50:13	2
4007476	99	35	29,5	cyclictest	109232	-21	ntpq	23:50:19	0
4007478	99	34	30,3	cyclictest	53100	-21	kworker/u8:0+flush-259:0	23:35:17	1
4007478	99	34	30,3	cyclictest	4118072	-21	apt-get	20:55:13	1
4007481	99	33	29,3	cyclictest	4117830	-21	kworker/u8:2+flush-259:0	21:36:53	2
4007476	99	33	29,3	cyclictest	252	-21	systemd-journal	20:20:00	0
4007481	99	32	28,3	cyclictest	4007428	-21	kworker/u8:2+events_unbound	19:40:23	2
4007481	99	32	26,4	cyclictest	73669	-21	kworker/u8:3+events_unbound	00:25:22	2
4007478	99	32	27,3	cyclictest	136241	-21	/usr/sbin/munin	00:20:13	1
4007481	99	31	26,4	cyclictest	4169491	-21	kworker/u8:0+flush-259:0	21:55:18	2
4007481	99	31	24,5	cyclictest	4007393	-21	latency_hist	19:10:01	2
4007481	99	31	24,5	cyclictest	4007393	-21	latency_hist	19:10:00	2
4007481	99	31	22,6	cyclictest	252	-21	systemd-journal	21:09:59	2
4007481	99	31	22,6	cyclictest	135077	-21	ntpq	00:15:19	2
4007476	99	31	28,2	cyclictest	125673	-21	kworker/u8:5+flush-259:0	00:25:00	0
4007476	99	31	27,3	cyclictest	4028471	-21	latency_hist	19:30:00	0
4007481	99	30	26,3	cyclictest	4185157	-21	kworker/u8:3+events_unbound	22:15:12	2
4007481	99	30	26,3	cyclictest	4012837	-21	kworker/u8:0+flush-259:0	19:35:23	2
4007481	99	30	26,3	cyclictest	4007428	-21	kworker/u8:2+flush-259:0	19:50:21	2
4007481	99	30	26,3	cyclictest	22226	-21	kworker/u8:2+flush-259:0	23:05:20	2
4007481	99	30	24,4	cyclictest	4012837	-21	kworker/u8:0+flush-259:0	20:25:28	2
4007478	99	30	26,3	cyclictest	53100	-21	kworker/u8:0+flush-259:0	23:35:00	1
4007476	99	30	26,3	cyclictest	4034321	-21	apt-get	19:35:12	0
4007478	99	29	25,3	cyclictest	22226	-21	kworker/u8:2+flush-259:0	23:25:26	1
4007478	99	29	22,5	cyclictest	4159850	-21	diskstats	21:35:14	1
4007476	99	29	26,2	cyclictest	53100	-21	kworker/u8:0+flush-259:0	23:15:20	0
4007476	99	29	26,2	cyclictest	4185157	-21	kworker/u8:3+flush-259:0	22:45:25	0
4007483	99	28	25,2	cyclictest	4117830	-21	kworker/u8:2+flush-259:0	22:00:01	3
4007483	99	28	23,4	cyclictest	22226	-21	kworker/u8:2+flush-259:0	23:00:16	3
4007483	99	28	22,4	cyclictest	4149034	-21	base64	21:25:00	3
4007481	99	28	24,3	cyclictest	4049726	-21	kworker/u8:3+events_unbound	21:00:15	2
4007476	99	28	23,3	cyclictest	4159656	-21	kworker/u8:4+flush-259:0	21:35:21	0
4007481	99	27	22,3	cyclictest	100070	-21	kworker/u8:4+flush-259:0	00:00:21	2
4007481	99	27	20,5	cyclictest	4143958	-21	diskstats	21:20:13	2
4007481	99	27	20,5	cyclictest	252	-21	systemd-journal	23:05:00	2
4007478	99	27	24,2	cyclictest	53100	-21	kworker/u8:0+flush-259:0	23:15:16	1
4007478	99	27	23,3	cyclictest	73669	-21	kworker/u8:3+flush-259:0	00:25:22	1
4007478	99	27	23,3	cyclictest	53100	-21	kworker/u8:0+flush-259:0	23:45:00	1
4007478	99	27	23,3	cyclictest	53100	-21	kworker/u8:0+flush-259:0	23:44:59	1
4007476	99	27	21,4	cyclictest	252	-21	systemd-journal	23:10:17	0
4007481	99	26	23,3	cyclictest	4101957	-21	kworker/u8:1+events_unbound	21:10:25	2
4007481	99	26	19,5	cyclictest	4154268	-21	latency_hist	21:30:01	2
4007478	99	26	23,2	cyclictest	73669	-21	kworker/u8:3+flush-259:0	23:20:23	1
4007478	99	26	23,2	cyclictest	4012837	-21	kworker/u8:0+events_unbound	19:35:23	1
4007478	99	26	21,3	cyclictest	4185157	-21	kworker/u8:3+events_unbound	22:45:00	1
4007476	99	26	22,3	cyclictest	4101957	-21	kworker/u8:1+flush-259:0	21:10:20	0
4007476	99	26	21,4	cyclictest	48368	-21	diskstats	22:55:13	0
4007483	99	25	21,3	cyclictest	4065096	-21	gpgv	20:05:00	3
4007483	99	25	15,9	cyclictest	0	-21	swapper/3	23:29:59	3
4007481	99	25	20,3	cyclictest	22226	-21	kworker/u8:2+flush-259:0	23:23:53	2
4007481	99	25	17,5	cyclictest	4095923	-21	ntpq	20:30:21	2
4007478	99	25	21,3	cyclictest	53100	-21	kworker/u8:0+events_unbound	00:10:18	1
4007478	99	25	20,4	cyclictest	4091688	-21	kworker/u8:2+flush-259:0	20:30:23	1
4007478	99	25	19,4	cyclictest	4065493	-21	base64	20:05:01	1
4007476	99	25	20,4	cyclictest	84598	-21	rred	23:30:00	0
4007476	99	25	19,4	cyclictest	252	-21	systemd-journal	23:50:00	0
4007481	99	24	21,2	cyclictest	73669	-21	kworker/u8:3+events_unbound	23:55:14	2
4007481	99	24	21,2	cyclictest	4101957	-21	kworker/u8:1+flush-259:0	21:15:24	2
4007481	99	24	20,3	cyclictest	73669	-21	kworker/u8:3+events_unbound	23:50:14	2
4007481	99	24	20,3	cyclictest	73669	-21	kworker/u8:3+events_unbound	00:20:25	2
4007481	99	24	20,3	cyclictest	4012837	-21	kworker/u8:0+events_unbound	19:55:26	2
4007478	99	24	19,3	cyclictest	252	-21	systemd-journal	19:27:16	1
4007476	99	24	21,2	cyclictest	4012837	-21	kworker/u8:0+events_unbound	20:20:18	0
4007483	99	23	18,4	cyclictest	4012837	-21	kworker/u8:0+flush-259:0	20:20:26	3
4007483	99	23	18,3	cyclictest	252	-21	systemd-journal	21:39:55	3
4007483	99	23	16,5	cyclictest	252	-21	systemd-journal	19:40:01	3
4007483	99	23	15,6	cyclictest	252	-21	systemd-journal	21:45:01	3
4007481	99	23	19,3	cyclictest	4117830	-21	kworker/u8:2+events_unbound	21:34:17	2
4007481	99	23	19,3	cyclictest	4101957	-21	kworker/u8:1+events_unbound	20:40:11	2
4007481	99	23	19,3	cyclictest	22226	-21	kworker/u8:2+flush-259:0	22:55:20	2
4007481	99	23	18,3	cyclictest	4117830	-21	kworker/u8:2+events_unbound	21:45:01	2
4007483	99	22	17,3	cyclictest	4012837	-21	kworker/u8:0+flush-259:0	19:50:00	3
4007483	99	22	16,4	cyclictest	4117830	-21	kworker/u8:2+flush-259:0	22:10:24	3
4007483	99	22	16,4	cyclictest	22226	-21	kworker/u8:2+flush-259:0	22:55:15	3
4007481	99	22	18,3	cyclictest	73669	-21	kworker/u8:3+flush-259:0	00:37:23	2
4007481	99	22	18,3	cyclictest	4117830	-21	kworker/u8:2+flush-259:0	22:05:18	2
4007481	99	22	18,3	cyclictest	4012837	-21	kworker/u8:0+events_unbound	20:37:16	2
4007481	99	22	18,3	cyclictest	22226	-21	kworker/u8:2+events_unbound	23:25:19	2
4007481	99	22	17,4	cyclictest	3997285	-21	kworker/u8:1+events_unbound	20:23:17	2
4007478	99	22	19,2	cyclictest	4138417	-21	kworker/u8:0+events_unbound	21:25:17	1
4007478	99	22	19,2	cyclictest	3997285	-21	kworker/u8:1+flush-259:0	19:45:24	1
4007478	99	22	18,3	cyclictest	507	-21	in:imuxsock	21:45:00	1
4007478	99	22	18,3	cyclictest	125673	-21	kworker/u8:5+flush-259:0	00:15:15	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


Access: public		Short link to this page
This page was last modified on 2021-09-01 - 00:34