OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack2slot7s.osadl.org (updated Sat Jun 13, 2026 00:43:32)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
4045991	99	70	59,7	cyclictest	4135727	-21	grep	22:35:01	1
4045990	99	54	47,5	cyclictest	4192467	-21	cron	00:05:01	0
4045991	99	50	38,5	cyclictest	0	-21	swapper/1	22:20:24	1
4045992	99	49	25,17	cyclictest	750	-21	ntpd	20:20:21	2
4045991	99	49	41,5	cyclictest	4164071	-21	munin-plugin-st	23:20:01	1
4045992	99	48	37,5	cyclictest	0	-21	swapper/2	23:35:24	2
4045992	99	48	37,5	cyclictest	0	-21	swapper/2	23:35:24	2
4045991	99	48	41,4	cyclictest	1000	-21	mta-sts-daemon	23:40:25	1
4045991	99	48	41,4	cyclictest	1000	-21	mta-sts-daemon	23:40:25	1
4045990	99	48	38,5	cyclictest	1002	-21	mta-sts-daemon	00:15:28	0
4045992	99	47	33,8	cyclictest	2299980	-21	cups-browsed	21:50:02	2
4045992	99	47	10,7	cyclictest	17	1	rcu_preempt	21:40:29	2
4045990	99	47	37,7	cyclictest	4160900	-21	latency_hist	23:15:03	0
4045990	99	47	0,4	cyclictest	17	1	rcu_preempt	20:10:28	0
4045991	99	46	38,5	cyclictest	4081979	-21	munin-run	21:10:01	1
4045991	99	46	37,6	cyclictest	4085504	-21	sh	21:15:16	1
4045991	99	46	34,8	cyclictest	0	-21	swapper/1	23:05:02	1
4045991	99	46	1,3	cyclictest	17	1	rcu_preempt	23:45:25	1
4045991	99	46	1,3	cyclictest	17	1	rcu_preempt	23:45:25	1
4045990	99	46	31,12	cyclictest	4116787	-21	ssh	22:05:01	0
4045992	99	45	36,6	cyclictest	0	-21	swapper/2	22:15:01	2
4045992	99	45	3,33	cyclictest	9077	-21	ssh	00:20:28	2
4045991	99	45	2,37	cyclictest	5938	-21	ssh	00:15:30	1
4045990	99	45	3,35	cyclictest	2299980	-21	cups-browsed	22:10:24	0
4045992	99	43	32,7	cyclictest	2299980	-21	cups-browsed	23:16:18	2
4045992	99	43	28,12	cyclictest	6315	-21	timerwakeupswit	00:15:36	2
4045991	99	43	35,5	cyclictest	4142034	-21	cron	22:45:01	1
4045990	99	43	35,6	cyclictest	4143184	-21	ssh	22:45:31	0
4045990	99	43	35,5	cyclictest	420	-21	avahi-daemon	21:35:32	0
4045992	99	42	33,5	cyclictest	421	-21	dbus-daemon	19:20:02	2
4045992	99	42	2,30	cyclictest	12175	-21	ssh	00:25:26	2
4045991	99	42	28,11	cyclictest	4146549	-21	switchtime	22:50:40	1
4045990	99	42	35,5	cyclictest	4154625	-21	munin-plugin-st	23:05:01	0
4045990	99	42	29,11	cyclictest	14	-21	ksoftirqd/0	22:25:24	0
4045990	99	42	2,7	cyclictest	17	1	rcu_preempt	22:50:28	0
4045990	99	42	1,38	cyclictest	665	-21	snmpd	19:20:27	0
4045992	99	41	4,28	cyclictest	4184066	-21	ssh	23:50:27	2
4045992	99	41	4,28	cyclictest	4184066	-21	ssh	23:50:27	2
4045992	99	41	33,5	cyclictest	4170454	-21	latency_hist	23:30:01	2
4045992	99	41	33,5	cyclictest	4059494	-21	systemd-run	19:55:01	2
4045990	99	41	1,37	cyclictest	0	-21	swapper/0	23:25:26	0
4045992	99	40	32,3	cyclictest	0	-21	swapper/2	23:00:36	2
4045992	99	40	31,6	cyclictest	4101011	-21	awk	21:40:01	2
4045991	99	40	32,5	cyclictest	11152	-21	systemd-run	00:25:01	1
4045990	99	40	4,27	cyclictest	4139873	-21	ssh	22:40:23	0
4045990	99	40	31,7	cyclictest	15	1	ktimers/0	00:35:26	0
4045990	99	40	30,7	cyclictest	15	1	ktimers/0	23:45:25	0
4045990	99	40	30,7	cyclictest	15	1	ktimers/0	23:45:25	0
4045990	99	40	26,11	cyclictest	126	50	irq/32-eth0	23:30:27	0
4045990	99	40	21,3	cyclictest	17	1	rcu_preempt	21:00:28	0
4045990	99	40	1,28	cyclictest	4162032	-21	ssh	23:15:29	0
4045992	99	39	30,5	cyclictest	4094690	-21	systemd-run	21:30:01	2
4045991	99	39	5,30	cyclictest	4114694	-21	ssh	22:00:26	1
4045991	99	39	31,5	cyclictest	4081977	-21	diskmemload	23:15:02	1
4045991	99	39	31,5	cyclictest	4054981	-21	awk	19:40:01	1
4045990	99	39	33,4	cyclictest	4189280	-21	systemctl	00:00:00	0
4045990	99	39	32,5	cyclictest	4083516	-21	grep	21:10:41	0
4045990	99	39	30,7	cyclictest	4110482	-21	sh	21:55:01	0
4045992	99	38	6,7	cyclictest	4081977	-21	diskmemload	21:55:32	2
4045992	99	38	31,4	cyclictest	4182992	-21	systemd-run	23:50:01	2
4045992	99	38	31,4	cyclictest	4182992	-21	systemd-run	23:50:01	2
4045992	99	38	29,5	cyclictest	0	-21	swapper/2	22:25:27	2
4045991	99	38	5,28	cyclictest	4089361	-21	ssh	21:20:25	1
4045991	99	38	4,26	cyclictest	4189302	-21	awk	00:00:01	1
4045991	99	38	3,30	cyclictest	4083156	-21	ssh	21:10:36	1
4045991	99	38	28,7	cyclictest	20570	-21	sendmail	00:40:01	1
4045991	99	38	23,8	cyclictest	0	-21	swapper/1	22:05:27	1
4045992	99	37	2,25	cyclictest	4139918	-21	ssh	22:40:25	2
4045991	99	37	7,6	cyclictest	28	-21	ksoftirqd/1	23:30:24	1
4045991	99	37	3,26	cyclictest	4143091	-21	ssh	22:45:26	1
4045991	99	37	30,4	cyclictest	487	-21	rs:main		1
4045991	99	37	25,9	cyclictest	4168362	-21	ssh	23:25:30	1
4045991	99	37	25,9	cyclictest	4061882	-21	ntp_kernel_pll_	20:00:25	1
4045991	99	37	25,9	cyclictest	4061882	-21	ntp_kernel_pll_	20:00:25	1
4045990	99	37	29,5	cyclictest	1	-21	systemd	23:25:01	0
4045990	99	37	27,4	cyclictest	0	-21	swapper/0	21:40:29	0
4045992	99	36	8,18	cyclictest	2778	-21	ssh	00:10:30	2
4045992	99	36	5,23	cyclictest	4095671	-21	ssh	21:30:24	2
4045992	99	36	30,3	cyclictest	0	-21	swapper/2	19:40:01	2
4045992	99	36	28,5	cyclictest	4156186	-21	grep	23:05:37	2
4045992	99	36	28,5	cyclictest	4060956	-21	cron	20:00:00	2
4045992	99	36	28,5	cyclictest	4060956	-21	cron	20:00:00	2
4045992	99	36	25,8	cyclictest	4110667	-21	latency_hist	21:55:02	2
4045992	99	36	19,4	cyclictest	17	1	rcu_preempt	20:10:28	2
4045991	99	36	27,5	cyclictest	17395	-21	cron	00:35:01	1
4045991	99	36	21,9	cyclictest	567	-21	gdbus	21:55:34	1
4045991	99	36	2,11	cyclictest	28	-21	ksoftirqd/1	20:45:28	1
4045991	99	36	18,14	cyclictest	27	1	ktimers/1	20:30:24	1
4045990	99	36	4,6	cyclictest	17	1	rcu_preempt	20:00:27	0
4045990	99	36	4,6	cyclictest	17	1	rcu_preempt	20:00:27	0
4045992	99	35	8,15	cyclictest	4193508	-21	ssh	00:05:29	2
4045992	99	35	29,3	cyclictest	0	-21	swapper/2	22:15:28	2
4045992	99	35	24,7	cyclictest	4187790	-21	sh	23:55:40	2
4045991	99	35	4,27	cyclictest	0	-21	swapper/1	20:50:28	1
4045991	99	35	4,17	cyclictest	4120956	-21	ssh	22:10:24	1
4045991	99	35	28,4	cyclictest	4105103	-21	awk	21:45:21	1
4045991	99	35	26,5	cyclictest	4176043	-21	kworker/u8:4-rpciod	23:39:49	1
4045991	99	35	26,5	cyclictest	4176043	-21	kworker/u8:4-rpciod	23:39:49	1
4045991	99	35	22,3	cyclictest	17	1	rcu_preempt	23:05:34	1
4045990	99	35	8,7	cyclictest	17	1	rcu_preempt	19:15:22	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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