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 Wed Apr 01, 2026 12:43:28)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
176325	99	54	43,5	cyclictest	0	-21	swapper/2	07:50:28	2
176323	99	50	43,4	cyclictest	0	-21	swapper/0	10:20:39	0
176325	99	49	31,14	cyclictest	358399	-21	aten_r2power_cu	12:10:18	2
176324	99	49	40,5	cyclictest	1	-21	systemd	10:15:01	1
176324	99	47	39,5	cyclictest	212294	-21	diskmemload	12:20:01	1
176325	99	46	18,19	cyclictest	1	-21	systemd	11:41:59	2
176324	99	46	38,5	cyclictest	374105	-21	cut	12:30:01	1
176323	99	46	39,4	cyclictest	367474	-21	mailstats	12:20:39	0
176323	99	46	2,36	cyclictest	221639	-21	ssh	09:20:29	0
176324	99	45	36,6	cyclictest	318803	-21	ntpq	11:20:28	1
176324	99	45	36,6	cyclictest	179347	-21	systemd-run	07:20:01	1
176324	99	45	36,6	cyclictest	179347	-21	systemd-run	07:20:01	1
176325	99	44	36,5	cyclictest	203294	-21	munin-run	08:40:01	2
176325	99	44	27,14	cyclictest	209293	-21	awk	09:00:01	2
176324	99	44	36,5	cyclictest	269522	-21	munin-plugin-st	10:20:00	1
176324	99	44	36,5	cyclictest	192815	-21	cron	08:05:00	1
176323	99	44	3,34	cyclictest	306760	-21	ssh	11:05:30	0
176323	99	44	29,9	cyclictest	123	50	irq/32-eth0	10:05:29	0
176323	99	44	29,9	cyclictest	123	50	irq/32-eth0	10:05:29	0
176323	99	44	29,7	cyclictest	123	50	irq/32-eth0	11:15:31	0
176323	99	44	14,23	cyclictest	343033	-21	ssh	11:50:32	0
176323	99	44	14,23	cyclictest	343033	-21	ssh	11:50:32	0
176325	99	43	4,35	cyclictest	250205	-21	ssh	09:55:30	2
176325	99	43	36,4	cyclictest	285499	-21	systemctl	10:40:01	2
176325	99	43	33,7	cyclictest	234432	-21	unixbench_multi	09:35:41	2
176325	99	43	2,36	cyclictest	211763	-21	ntpq	09:05:33	2
176325	99	43	2,35	cyclictest	330878	-21	ntpq	11:35:29	2
176325	99	43	2,33	cyclictest	262507	-21	ssh	10:10:32	2
176325	99	43	1,35	cyclictest	178693	-21	ntpq	07:15:29	2
176325	99	43	1,35	cyclictest	178693	-21	ntpq	07:15:29	2
176325	99	43	10,17	cyclictest	212294	-21	diskmemload	09:23:20	2
176324	99	43	4,32	cyclictest	298733	-21	ssh	10:55:32	1
176324	99	43	34,6	cyclictest	421	-21	dbus-daemon	12:05:02	1
176323	99	43	30,8	cyclictest	124	50	irq/33-eth0	12:35:31	0
176325	99	42	8,24	cyclictest	428	-21	mta-sts-daemon	12:15:31	2
176325	99	42	33,5	cyclictest	421	-21	dbus-daemon	12:05:38	2
176325	99	42	33,5	cyclictest	220512	-21	munin-plugin-st	09:20:00	2
176325	99	42	2,35	cyclictest	286739	-21	ntpq	10:40:34	2
176325	99	42	2,34	cyclictest	195186	-21	ntpq	08:10:28	2
176325	99	42	2,33	cyclictest	210160	-21	ntpq	09:00:28	2
176325	99	42	1,37	cyclictest	187799	-21	ntpq	07:45:33	2
176325	99	42	1,36	cyclictest	293947	-21	/usr/sbin/munin	10:50:20	2
176325	99	42	0,39	cyclictest	307602	-21	ssh	11:06:01	2
176323	99	42	1,33	cyclictest	310918	-21	ssh	11:10:33	0
176323	99	42	1,33	cyclictest	310918	-21	ssh	11:10:33	0
176325	99	41	7,30	cyclictest	278064	-21	ssh	10:30:15	2
176325	99	41	4,28	cyclictest	229873	-21	ssh	09:30:32	2
176325	99	41	29,7	cyclictest	420	-21	avahi-daemon	11:13:30	2
176325	99	41	29,7	cyclictest	420	-21	avahi-daemon	11:13:30	2
176325	99	41	2,33	cyclictest	190647	-21	ntpq	07:55:27	2
176325	99	41	1,35	cyclictest	274835	-21	ntpq	10:25:34	2
176325	99	41	1,35	cyclictest	266690	-21	ntpq	10:15:33	2
176325	99	41	1,35	cyclictest	253444	-21	ssh	10:00:05	2
176325	99	41	1,35	cyclictest	192158	-21	/usr/sbin/munin	08:00:27	2
176325	99	41	1,34	cyclictest	366390	-21	ssh	12:20:13	2
176325	99	41	1,34	cyclictest	181729	-21	ntpq	07:25:30	2
176325	99	41	1,33	cyclictest	243165	-21	ssh	09:46:34	2
176325	99	41	1,33	cyclictest	243165	-21	ssh	09:46:34	2
176325	99	41	1,23	cyclictest	205661	-21	ntpq	08:45:29	2
176324	99	41	34,4	cyclictest	198052	-21	kworker/u8:3-rpciod	09:30:18	1
176324	99	41	33,5	cyclictest	253217	-21	ssh	10:00:01	1
176324	99	41	33,5	cyclictest	182329	-21	systemd-run	07:30:00	1
176323	99	41	3,34	cyclictest	254320	-21	ssh	10:00:30	0
176325	99	40	7,29	cyclictest	197961	-21	sshd	08:20:25	2
176325	99	40	32,5	cyclictest	378189	-21	latency_hist	12:35:02	2
176325	99	40	2,34	cyclictest	302747	-21	ntpq	11:00:29	2
176325	99	40	1,36	cyclictest	320710	-21	ssh	11:23:00	2
176325	99	40	1,35	cyclictest	340379	-21	ssh	11:47:05	2
176325	99	40	1,35	cyclictest	227128	-21	ssh	09:27:06	2
176325	99	40	1,35	cyclictest	227128	-21	ssh	09:27:06	2
176325	99	40	1,34	cyclictest	379268	-21	ntpq	12:35:31	2
176325	99	40	1,34	cyclictest	313986	-21	ssh	11:15:09	2
176325	99	40	1,34	cyclictest	204304	-21	/usr/sbin/munin	08:40:32	2
176325	99	40	1,34	cyclictest	180309	-21	ntpq	07:20:34	2
176324	99	40	32,3	cyclictest	0	-21	swapper/1	09:15:29	1
176324	99	40	31,6	cyclictest	241116	-21	latency_hist	09:45:03	1
176324	99	40	27,10	cyclictest	282445	-21	missed_timers	10:35:26	1
176325	99	39	3,32	cyclictest	421	-21	dbus-daemon	11:58:38	2
176325	99	39	14,20	cyclictest	0	-21	swapper/2	12:25:24	2
176325	99	39	1,36	cyclictest	301083	-21	ssh	10:59:00	2
176325	99	39	1,36	cyclictest	259470	-21	ssh	10:06:27	2
176325	99	39	1,36	cyclictest	259470	-21	ssh	10:06:27	2
176325	99	39	1,34	cyclictest	421	-21	dbus-daemon	08:09:33	2
176325	99	39	1,34	cyclictest	421	-21	dbus-daemon	08:09:33	2
176325	99	39	1,34	cyclictest	326076	-21	ssh	11:30:11	2
176325	99	39	1,34	cyclictest	272465	-21	ssh	10:22:49	2
176325	99	39	1,34	cyclictest	199694	-21	ntpq	08:25:30	2
176325	99	39	1,33	cyclictest	350284	-21	ssh	12:00:13	2
176325	99	39	1,33	cyclictest	207202	-21	ntpq	08:50:29	2
176324	99	39	31,5	cyclictest	249060	-21	cron	09:55:00	1
176324	99	39	30,6	cyclictest	261	-21	systemd-journal	12:40:01	1
176324	99	39	30,5	cyclictest	206826	-21	fschecks_time	08:50:22	1
176324	99	39	29,6	cyclictest	279599	-21	sshd	10:31:25	1
176324	99	39	2,31	cyclictest	233952	-21	ssh	09:35:32	1
176323	99	39	33,4	cyclictest	289541	-21	munin-plugin-st	10:45:01	0
176323	99	39	31,6	cyclictest	374105	-21	munin-plugin-st	12:30:01	0
176323	99	39	31,5	cyclictest	420	-21	avahi-daemon	09:26:29	0
176323	99	39	31,5	cyclictest	420	-21	avahi-daemon	09:26:29	0
176325	99	38	1,35	cyclictest	344080	-21	ssh	11:51:30	2
176325	99	38	1,35	cyclictest	344080	-21	ssh	11:51:30	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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