OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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, lowest P state: ondemand
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack5slot4s.osadl.org (updated Tue Aug 04, 2026 00:44:13)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
494360	2	198	0,3	sleep3	575	-21	kworker/3:2+events	21:23:00	3
676896	2	92	0,2	sleep3	48	1	ktimers/3	00:27:57	3
576234	2	65	0,5	sleep3	0	-21	swapper/3	22:43:08	3
613809	2	59	0,2	sleep2	37	1	rcuc/2	23:22:59	2
417777	2	59	0,5	chrt	0	-21	swapper/0	20:05:01	0
360415	99	55	49,4	cyclictest	3166996	-21	kworker/u8:1+events_unbound	19:30:00	1
360415	99	55	49,4	cyclictest	3166996	-21	kworker/u8:1+events_unbound	19:30:00	1
360415	99	49	43,5	cyclictest	487256	-21	kworker/u8:2+events_unbound	21:28:10	1
360415	99	49	43,4	cyclictest	539908	-21	kworker/u8:3+events_unbound	22:15:00	1
360415	99	49	43,4	cyclictest	3166996	-21	kworker/u8:1+events_unbound	19:18:09	1
360415	99	49	40,6	cyclictest	397831	-21	latency_hist	19:45:02	1
360412	99	49	40,6	cyclictest	377730	-21	base64	19:25:00	0
360415	99	48	43,3	cyclictest	482087	-21	kworker/u8:3+events_unbound	21:18:07	1
360415	99	48	41,5	cyclictest	457136	-21	kworker/u8:1+flush-8:0	21:07:53	1
360415	99	47	40,5	cyclictest	487256	-21	kworker/u8:2+flush-8:0	22:28:06	1
360412	99	47	21,23	cyclictest	487029	-21	latency_hist	21:15:01	0
360415	99	46	40,4	cyclictest	539908	-21	kworker/u8:3+events_unbound	23:08:05	1
360412	99	43	19,20	cyclictest	556589	-21	latency_hist	22:25:00	0
360415	99	42	36,4	cyclictest	422786	-21	kworker/u8:3+events_unbound	20:43:05	1
360415	99	42	35,5	cyclictest	487256	-21	kworker/u8:2+flush-8:0	21:57:55	1
360412	99	42	35,5	cyclictest	377579	-21	apt-get	19:25:02	0
360412	99	42	35,5	cyclictest	377579	-21	apt-get	19:25:02	0
360412	99	42	27,13	cyclictest	616353	-21	latency_hist	23:25:00	0
360415	99	41	35,4	cyclictest	412664	-21	kworker/u8:2+flush-8:0	20:58:05	1
360415	99	41	34,6	cyclictest	600995	-21	kworker/u8:0+flush-8:0	23:22:58	1
360415	99	41	33,6	cyclictest	432431	-21	latency_hist	20:20:01	1
360412	99	41	33,5	cyclictest	536783	-21	latency_hist	22:05:01	0
360412	99	41	26,13	cyclictest	275	-21	systemd-journal	00:30:00	0
360412	99	41	22,17	cyclictest	676049	-21	latency_hist	00:25:00	0
360415	99	40	35,4	cyclictest	621639	-21	kworker/u8:3+flush-8:0	23:48:05	1
360415	99	40	34,4	cyclictest	457136	-21	kworker/u8:1+flush-8:0	21:13:10	1
360415	99	39	34,4	cyclictest	539908	-21	kworker/u8:3+events_unbound	22:38:10	1
360412	99	39	24,13	cyclictest	590605	-21	ntpq	22:58:07	0
360412	99	39	22,13	cyclictest	0	-21	swapper/0	20:13:05	0
360412	99	39	21,16	cyclictest	438112	-21	fschecks_count	20:27:56	0
360412	99	39	21,16	cyclictest	438112	-21	fschecks_count	20:27:55	0
360415	99	38	33,4	cyclictest	457136	-21	kworker/u8:1+events_unbound	20:53:03	1
360415	99	38	33,3	cyclictest	482087	-21	kworker/u8:3+events_unbound	21:48:09	1
360415	99	38	32,5	cyclictest	539908	-21	kworker/u8:3+flush-8:0	22:58:03	1
360415	99	38	32,4	cyclictest	482087	-21	kworker/u8:3+flush-8:0	21:43:03	1
360412	99	38	22,14	cyclictest	497881	-21	fschecks_count	21:27:55	0
360416	99	37	28,7	cyclictest	626319	-21	apt-get	23:35:00	2
360415	99	37	33,3	cyclictest	571719	-21	kworker/u8:2+flush-8:0	23:27:54	1
360415	99	37	31,5	cyclictest	571719	-21	kworker/u8:2+flush-8:0	22:48:08	1
360415	99	37	29,6	cyclictest	462079	-21	latency_hist	20:50:01	1
360412	99	37	3,25	cyclictest	0	-21	swapper/0	21:02:50	0
360412	99	37	31,4	cyclictest	401	-21	dbus-daemon	23:15:00	0
360412	99	37	19,16	cyclictest	482054	-21	cron	21:10:00	0
360412	99	37	15,19	cyclictest	407694	-21	latency_hist	19:55:01	0
360415	99	36	31,4	cyclictest	539908	-21	kworker/u8:3+events_unbound	22:33:06	1
360415	99	36	30,4	cyclictest	539908	-21	kworker/u8:3+events_unbound	22:22:52	1
360415	99	36	30,4	cyclictest	539908	-21	kworker/u8:3+events_unbound	22:17:52	1
360415	99	36	29,5	cyclictest	482087	-21	kworker/u8:3+flush-8:0	21:38:02	1
360415	99	36	29,5	cyclictest	422786	-21	kworker/u8:3+flush-8:0	20:23:04	1
360415	99	36	25,9	cyclictest	476897	-21	apt-get	21:05:00	1
360412	99	36	3,26	cyclictest	0	-21	swapper/0	20:32:50	0
360412	99	36	3,26	cyclictest	0	-21	swapper/0	00:17:49	0
360412	99	36	27,7	cyclictest	432888	-21	/usr/sbin/munin	20:23:02	0
360412	99	36	27,6	cyclictest	452165	-21	latency_hist	20:40:02	0
360412	99	36	19,15	cyclictest	511813	-21	unixbench_singl	21:38:09	0
360415	99	35	31,3	cyclictest	651539	-21	kworker/u8:4+flush-8:0	00:18:07	1
360415	99	35	30,4	cyclictest	317305	-21	kworker/u8:3+flush-8:0	19:13:08	1
360415	99	35	30,4	cyclictest	3166996	-21	kworker/u8:1+events_unbound	19:22:54	1
360415	99	35	30,3	cyclictest	422786	-21	kworker/u8:3+flush-8:0	20:13:09	1
360415	99	35	30,3	cyclictest	387009	-21	kworker/u8:0+events_unbound	19:57:52	1
360415	99	35	29,5	cyclictest	539908	-21	kworker/u8:3+flush-8:0	22:08:05	1
360415	99	35	28,5	cyclictest	566427	-21	kworker/u8:1+flush-8:0	22:43:01	1
360412	99	35	3,27	cyclictest	0	-21	swapper/0	23:27:50	0
360412	99	35	3,24	cyclictest	0	-21	swapper/0	20:57:51	0
360412	99	35	3,17	cyclictest	0	-21	swapper/0	21:22:51	0
360412	99	35	19,14	cyclictest	0	-21	swapper/0	19:47:55	0
360412	99	35	18,15	cyclictest	665769	-21	switchtime	00:13:09	0
360412	99	35	18,15	cyclictest	626133	-21	unixbench_singl	23:33:09	0
360412	99	35	18,15	cyclictest	0	-21	swapper/0	22:40:01	0
360416	99	34	9,12	cyclictest	393356	-21	apt-get	19:42:51	2
360415	99	34	29,4	cyclictest	571719	-21	kworker/u8:2+events_unbound	23:53:11	1
360415	99	34	29,3	cyclictest	413828	-21	irqrtprio	20:02:58	1
360415	99	34	28,5	cyclictest	507085	-21	kworker/u8:1+flush-8:0	22:03:08	1
360415	99	34	26,6	cyclictest	631966	-21	/usr/sbin/munin	23:43:08	1
360412	99	34	2,24	cyclictest	571	-21	snmpd	23:42:51	0
360412	99	34	2,22	cyclictest	0	-21	swapper/0	21:16:54	0
360412	99	34	18,14	cyclictest	422305	-21	unixbench_multi	20:08:11	0
360412	99	34	17,15	cyclictest	581873	-21	aten2_r5power_c	22:52:55	0
360412	99	34	17,15	cyclictest	0	-21	swapper/0	00:08:09	0
360412	99	34	13,19	cyclictest	537833	-21	ps	22:07:57	0
360412	99	34	12,18	cyclictest	387833	-21	grep	19:35:00	0
360415	99	33	27,4	cyclictest	651538	-21	kworker/u8:1+events_unbound	00:33:07	1
360415	99	33	27,4	cyclictest	571719	-21	kworker/u8:2+flush-8:0	22:52:57	1
360415	99	33	24,7	cyclictest	606279	-21	cat	23:15:00	1
360412	99	33	4,24	cyclictest	0	-21	swapper/0	21:32:51	0
360412	99	33	3,27	cyclictest	0	-21	swapper/0	19:37:49	0
360412	99	33	3,26	cyclictest	0	-21	swapper/0	22:32:51	0
360412	99	33	3,25	cyclictest	0	-21	swapper/0	20:17:49	0
360412	99	33	28,3	cyclictest	411838	-21	needreboot	19:58:00	0
360412	99	33	26,5	cyclictest	487256	-21	kworker/u8:2+flush-8:0	22:13:08	0
360412	99	33	24,5	cyclictest	0	-21	swapper/0	19:15:03	0
360412	99	33	2,30	cyclictest	0	-21	swapper/0	19:43:08	0
360412	99	33	15,16	cyclictest	561358	-21	unixbench_singl	22:28:08	0
360412	99	33	14,17	cyclictest	576151	-21	sort	22:43:08	0
360416	99	32	24,6	cyclictest	596640	-21	apt-get	23:07:51	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2019-05-28 - 00:17