OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, 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.
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 rack7slot4s.osadl.org (updated Mon Sep 14, 2026 00:45:09)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
23105	99	59	4,41	cyclictest	27187	-21	ssh	21:20:17	0
23128	99	53	37,9	cyclictest	2917	-21	apt-get	20:30:14	2
23128	99	49	34,4	cyclictest	11537	-21	apt-get	23:35:13	2
23128	99	48	18,21	cyclictest	0	-21	swapper/2	19:40:15	2
23105	99	48	5,8	cyclictest	13	1	rcu_preempt	21:55:13	0
23105	99	47	2,39	cyclictest	21946	-21	ssh	21:35:12	0
23128	99	44	31,9	cyclictest	9487	-21	apt-get	22:40:15	2
23128	99	44	15,20	cyclictest	20175	-21	ssh	22:10:09	2
23140	99	43	6,26	cyclictest	359	66	irq/58-eth0	22:05:15	3
23140	99	43	18,17	cyclictest	359	66	irq/58-eth0	21:10:13	3
23128	99	43	15,18	cyclictest	9069	-21	ssh	21:10:13	2
23128	99	43	14,10	cyclictest	3982	-21	sh	00:24:47	2
23116	99	43	2,31	cyclictest	11151	-21	ssh	22:05:15	1
23140	99	42	4,28	cyclictest	359	66	irq/58-eth0	22:35:14	3
23128	99	42	34,3	cyclictest	4567	-21	apt-get	00:25:13	2
23128	99	42	2,21	cyclictest	13259	-21	ssh	23:00:14	2
23128	99	41	33,3	cyclictest	333	-21	apt-get	22:35:14	2
23128	99	41	27,10	cyclictest	11139	-21	apt-get	22:05:15	2
23128	99	41	19,17	cyclictest	0	-21	swapper/2	19:10:15	2
23128	99	40	33,4	cyclictest	28038	-21	apt-get	19:15:14	2
23128	99	40	23,12	cyclictest	9862	-21	apt-get	00:10:18	2
23128	99	40	17,12	cyclictest	0	-21	swapper/2	23:10:12	2
23128	99	40	13,13	cyclictest	21249	-21	irqrtprio	23:40:19	2
23128	99	39	24,10	cyclictest	18921	-21	apt-get	00:15:15	2
23128	99	39	18,18	cyclictest	18504	-21	/usr/sbin/munin	22:45:16	2
23105	99	39	1,27	cyclictest	13277	-21	ssh	23:00:15	0
23128	99	38	31,4	cyclictest	392	-21	apt-get	19:20:13	2
23128	99	38	24,9	cyclictest	0	-21	swapper/2	23:25:13	2
23128	99	38	23,11	cyclictest	0	-21	swapper/2	23:20:12	2
23128	99	38	21,13	cyclictest	6872	-21	ssh	23:50:17	2
23128	99	38	18,17	cyclictest	2522	-21	/usr/sbin/munin	23:30:29	2
23128	99	38	18,15	cyclictest	29216	-21	/usr/sbin/munin	22:15:25	2
23128	99	38	12,12	cyclictest	7090	-21	ssh	21:45:00	2
23128	99	38	11,13	cyclictest	7902	-21	apt-get	23:15:13	2
23128	99	38	11,11	cyclictest	0	-21	swapper/2	22:26:03	2
23128	99	37	17,12	cyclictest	17554	-21	timerandwakeup	00:30:29	2
23128	99	37	17,12	cyclictest	17554	-21	timerandwakeup	00:30:29	2
23128	99	37	17,11	cyclictest	21137	-21	sed	20:15:18	2
23128	99	37	12,8	cyclictest	30253	-21	ssh	21:39:42	2
23128	99	37	12,12	cyclictest	1920	-21	unixbench_multi	20:25:28	2
23105	99	37	3,28	cyclictest	11568	-21	ssh	23:35:14	0
23105	99	37	1,25	cyclictest	30937	-21	ssh	21:40:13	0
23140	99	36	15,12	cyclictest	0	-21	swapper/3	23:05:14	3
23140	99	36	1,20	cyclictest	359	66	irq/58-eth0	00:05:13	3
23128	99	36	17,15	cyclictest	0	-21	swapper/2	00:05:14	2
23128	99	36	13,9	cyclictest	15130	-21	apt-get	23:55:11	2
23128	99	36	12,9	cyclictest	0	-21	swapper/2	22:34:26	2
23128	99	36	12,11	cyclictest	11140	-21	ssh	21:28:31	2
23105	99	36	1,24	cyclictest	20235	-21	ssh	22:10:12	0
23128	99	35	9,11	cyclictest	0	-21	swapper/2	20:20:29	2
23128	99	35	24,7	cyclictest	25582	-21	apt-get	21:55:13	2
23128	99	35	22,11	cyclictest	11279	-21	mailstats	20:35:26	2
23128	99	35	14,12	cyclictest	16232	-21	/usr/sbin/munin	20:10:16	2
23128	99	35	11,10	cyclictest	0	-21	swapper/2	22:03:52	2
23128	99	35	10,8	cyclictest	0	-21	swapper/2	21:34:33	2
23105	99	35	2,19	cyclictest	789	-21	ssh	00:05:13	0
23140	99	34	8,16	cyclictest	359	66	irq/58-eth0	20:15:15	3
23128	99	34	9,10	cyclictest	0	-21	swapper/2	21:15:27	2
23128	99	34	8,11	cyclictest	0	-21	swapper/2	22:52:38	2
23128	99	34	19,12	cyclictest	31714	-21	munin-node	21:00:11	2
23128	99	34	18,9	cyclictest	13780	-21	ls	19:30:29	2
23128	99	34	18,13	cyclictest	32754	-21	processes	19:50:27	2
23128	99	34	18,13	cyclictest	28209	-21	sed	19:45:28	2
23128	99	34	16,12	cyclictest	27	-21	ksoftirqd/2	00:00:18	2
23128	99	34	12,13	cyclictest	11471	-21	fschecks_time	20:05:16	2
23128	99	34	10,19	cyclictest	29058	-21	ssh	00:37:28	2
23128	99	34	10,19	cyclictest	29058	-21	ssh	00:37:27	2
23116	99	34	2,3	cyclictest	13	1	rcu_preempt	23:35:13	1
23116	99	34	2,21	cyclictest	25599	-21	ssh	21:55:15	1
23116	99	34	1,25	cyclictest	4577	-21	ssh	00:25:12	1
23116	99	34	12,19	cyclictest	21	-21	ksoftirqd/1	22:35:14	1
23140	99	33	5,13	cyclictest	359	66	irq/58-eth0	22:30:18	3
23140	99	33	1,19	cyclictest	359	66	irq/58-eth0	20:05:13	3
23128	99	33	19,7	cyclictest	6638	-21	forks	20:00:17	2
23128	99	33	18,8	cyclictest	18732	-21	uptime	19:35:29	2
23128	99	33	18,12	cyclictest	13801	-21	ssh	22:24:21	2
23128	99	33	18,12	cyclictest	13801	-21	ssh	22:24:21	2
23128	99	33	17,8	cyclictest	24241	-21	tr	23:05:22	2
23128	99	33	17,13	cyclictest	9940	-21	date	19:30:01	2
23128	99	33	17,13	cyclictest	26608	-21	cat	20:50:32	2
23128	99	33	16,13	cyclictest	5258	-21	grep	19:55:25	2
23128	99	33	16,13	cyclictest	30309	-21	sh	23:45:19	2
23128	99	33	16,13	cyclictest	17320	-21	/usr/sbin/munin	20:45:26	2
23116	99	33	6,23	cyclictest	6163	-21	ssh	23:50:11	1
23128	99	32	17,12	cyclictest	31072	-21	kworker/u8:2	21:45:03	2
23128	99	32	16,13	cyclictest	30996	-21	awk	21:20:31	2
23128	99	32	15,13	cyclictest	12839	-21	cron	23:00:01	2
23128	99	32	10,10	cyclictest	24137	-21	ssh	21:53:45	2
23116	99	32	15,14	cyclictest	22251	-21	ssh	23:05:14	1
23116	99	32	12,12	cyclictest	21	-21	ksoftirqd/1	19:20:13	1
23105	99	32	3,22	cyclictest	18544	-21	ssh	22:45:13	0
23105	99	31	12,10	cyclictest	23092	-21	cyclictest	00:30:14	0
23105	99	31	12,10	cyclictest	23092	-21	cyclictest	00:30:14	0
23140	99	30	1,18	cyclictest	359	66	irq/58-eth0	20:40:12	3
23128	99	30	15,12	cyclictest	12510	-21	/usr/sbin/munin	20:40:32	2
23140	99	29	1,17	cyclictest	359	66	irq/58-eth0	22:55:12	3
23128	99	29	14,12	cyclictest	4230	-21	grep	21:05:15	2
23116	99	29	7,19	cyclictest	14764	-21	ssh	22:25:13	1
23128	99	28	16,8	cyclictest	30371	-21	ntpq	20:55:25	2
23116	99	28	7,16	cyclictest	12803	-21	ssh	21:30:13	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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