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 Thu Mar 26, 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
3110740	99	65	58,4	cyclictest	1056	-21	mta-sts-daemon	20:50:28	2
3110740	99	57	8,4	cyclictest	0	-21	swapper/2	23:40:24	2
3110740	99	57	48,6	cyclictest	3272821	-21	systemd-run	23:40:01	2
3110739	99	52	41,4	cyclictest	0	-21	swapper/1	21:45:28	1
3110739	99	52	41,4	cyclictest	0	-21	swapper/1	21:45:28	1
3110740	99	49	39,6	cyclictest	1051	-21	mta-sts-daemon	21:55:41	2
3110738	99	49	27,17	cyclictest	15	1	ktimers/0	20:05:25	0
3110740	99	47	38,5	cyclictest	421	-21	dbus-daemon	21:25:01	2
3110739	99	47	38,5	cyclictest	3159431	-21	ssh	21:25:01	1
3110738	99	47	18,24	cyclictest	3303153	-21	ssh	00:15:26	0
3110740	99	46	1,31	cyclictest	3299076	-21	sh	00:10:28	2
3110740	99	46	1,31	cyclictest	3299076	-21	sh	00:10:28	2
3110739	99	45	38,4	cyclictest	0	-21	swapper/1	22:40:35	1
3110738	99	45	34,6	cyclictest	123	50	irq/32-eth0	22:00:30	0
3110740	99	44	35,5	cyclictest	3150939	-21	munin-plugin-st	21:15:00	2
3110740	99	44	16,3	cyclictest	17	1	rcu_preempt	22:05:28	2
3110739	99	44	20,19	cyclictest	1144518	-21	cups-browsed	21:55:32	1
3110738	99	44	32,7	cyclictest	123	50	irq/32-eth0	22:10:26	0
3110738	99	44	20,6	cyclictest	124	50	irq/33-eth0	23:20:29	0
3110740	99	43	5,27	cyclictest	3190320	-21	ssh	22:00:32	2
3110740	99	43	31,7	cyclictest	3268621	-21	systemd-run	23:35:01	2
3110739	99	43	33,6	cyclictest	1	-21	systemd	19:30:01	1
3110738	99	43	4,31	cyclictest	3211220	-21	ssh	22:25:29	0
3110740	99	42	7,5	cyclictest	17	1	rcu_preempt	00:30:25	2
3110740	99	42	34,4	cyclictest	3187134	-21	kworker/u8:6-xprtiod	22:45:01	2
3110740	99	42	33,6	cyclictest	3137739	-21	systemd-run	20:40:01	2
3110739	99	42	34,5	cyclictest	421	-21	dbus-daemon	19:10:01	1
3110739	99	42	33,5	cyclictest	3128729	-21	sh	20:10:01	1
3110738	99	42	3,28	cyclictest	3219511	-21	ssh	22:35:28	0
3110738	99	42	25,14	cyclictest	3235481	-21	aten_r2power_cu	22:55:14	0
3110740	99	41	1,35	cyclictest	36	-21	ksoftirqd/2	21:30:24	2
3110739	99	41	33,5	cyclictest	3115259	-21	systemd-run	19:25:02	1
3110738	99	41	35,3	cyclictest	0	-21	swapper/0	21:10:01	0
3110738	99	41	31,4	cyclictest	3286025	-21	fschecks_time	23:55:18	0
3110740	99	40	32,5	cyclictest	3133236	-21	systemd-run	20:25:01	2
3110740	99	40	31,6	cyclictest	3210017	-21	systemd-run	22:25:01	2
3110740	99	40	27,10	cyclictest	3203122	-21	switchtime	22:15:36	2
3110740	99	40	1,31	cyclictest	1144518	-21	cups-browsed	22:25:25	2
3110739	99	40	32,5	cyclictest	3299617	-21	sed	00:10:38	1
3110739	99	40	32,5	cyclictest	3299617	-21	sed	00:10:38	1
3110739	99	40	32,5	cyclictest	3264401	-21	sh	23:30:01	1
3110739	99	40	32,5	cyclictest	3121249	-21	systemd-run	19:45:01	1
3110739	99	40	31,6	cyclictest	3290374	-21	kernelversion	00:00:19	1
3110738	99	40	32,5	cyclictest	1144515	-21	cupsd	21:46:11	0
3110738	99	40	32,5	cyclictest	1144515	-21	cupsd	21:46:11	0
3110738	99	40	31,6	cyclictest	3299138	-21	ntp_states	00:10:31	0
3110738	99	40	31,6	cyclictest	3299138	-21	ntp_states	00:10:31	0
3110740	99	39	5,28	cyclictest	3303153	-21	ssh	00:15:26	2
3110740	99	39	33,3	cyclictest	0	-21	swapper/2	23:25:24	2
3110740	99	39	3,26	cyclictest	3289533	-21	cups-browsed	00:05:27	2
3110740	99	39	3,26	cyclictest	3289533	-21	cups-browsed	00:05:27	2
3110740	99	39	30,5	cyclictest	3235091	-21	cron	22:55:01	2
3110740	99	39	28,7	cyclictest	1144518	-21	cups-browsed	22:45:33	2
3110740	99	39	26,9	cyclictest	3290474	-21	missed_timers	00:00:20	2
3110739	99	39	3,27	cyclictest	3236336	-21	ssh	22:55:30	1
3110740	99	38	32,3	cyclictest	0	-21	swapper/2	19:45:01	2
3110740	99	38	31,3	cyclictest	0	-21	swapper/2	23:05:01	2
3110740	99	38	31,3	cyclictest	0	-21	swapper/2	23:05:01	2
3110740	99	38	15,5	cyclictest	17	1	rcu_preempt	20:05:27	2
3110739	99	38	4,27	cyclictest	3240439	-21	ssh	23:00:28	1
3110739	99	38	4,27	cyclictest	3240439	-21	ssh	23:00:28	1
3110739	99	38	3,26	cyclictest	3274016	-21	ssh	23:40:30	1
3110739	99	38	28,7	cyclictest	3312056	-21	timerwakeupswit	00:25:37	1
3110739	99	38	28,7	cyclictest	3298028	-21	latency_hist	00:10:02	1
3110739	99	38	28,7	cyclictest	3298028	-21	latency_hist	00:10:02	1
3110739	99	38	25,10	cyclictest	3146715	-21	diskmemload	22:25:26	1
3110738	99	38	29,7	cyclictest	3316466	-21	sshd	00:30:45	0
3110738	99	38	17,13	cyclictest	15	1	ktimers/0	00:00:29	0
3110740	99	37	6,23	cyclictest	3307344	-21	ssh	00:20:25	2
3110740	99	37	6,21	cyclictest	659	-21	snmpd	21:45:28	2
3110740	99	37	6,21	cyclictest	659	-21	snmpd	21:45:28	2
3110740	99	37	28,6	cyclictest	3176402	-21	latency_hist	21:45:02	2
3110740	99	37	27,6	cyclictest	3320556	-21	unixbench_singl	00:35:36	2
3110740	99	37	26,5	cyclictest	0	-21	swapper/2	00:25:30	2
3110740	99	37	22,2	cyclictest	17	1	rcu_preempt	19:45:23	2
3110740	99	37	22,2	cyclictest	17	1	rcu_preempt	19:45:23	2
3110739	99	37	30,3	cyclictest	0	-21	swapper/1	22:20:01	1
3110739	99	37	30,3	cyclictest	0	-21	swapper/1	00:30:20	1
3110739	99	37	29,4	cyclictest	0	-21	swapper/1	22:45:31	1
3110739	99	37	29,3	cyclictest	0	-21	swapper/1	21:10:00	1
3110739	99	37	27,6	cyclictest	3270336	-21	unixbench_singl	23:35:37	1
3110739	99	37	26,7	cyclictest	421	-21	dbus-daemon	22:25:03	1
3110738	99	37	31,4	cyclictest	3165390	-21	unixbench_singl	21:30:37	0
3110738	99	37	2,31	cyclictest	3282371	-21	ssh	23:50:29	0
3110738	99	37	2,28	cyclictest	3181697	-21	ssh	21:50:27	0
3110738	99	37	2,28	cyclictest	3181697	-21	ssh	21:50:27	0
3110740	99	36	28,4	cyclictest	3234308	-21	kworker/u8:13-xprtiod	00:00:00	2
3110740	99	36	26,6	cyclictest	3252510	-21	fschecks_count	23:15:18	2
3110740	99	36	26,5	cyclictest	0	-21	swapper/2	23:50:29	2
3110740	99	36	25,7	cyclictest	3145737	-21	fschecks_count	21:05:17	2
3110740	99	36	25,4	cyclictest	0	-21	swapper/2	19:50:23	2
3110740	99	36	25,4	cyclictest	0	-21	swapper/2	19:50:23	2
3110740	99	36	23,8	cyclictest	3236179	-21	sh	22:55:24	2
3110740	99	36	2,27	cyclictest	3152131	-21	ssh	21:15:29	2
3110739	99	36	29,4	cyclictest	0	-21	swapper/1	22:00:29	1
3110739	99	36	28,5	cyclictest	3218353	-21	cron	22:35:01	1
3110739	99	36	28,5	cyclictest	3134737	-21	systemd-run	20:30:01	1
3110739	99	36	27,5	cyclictest	0	-21	swapper/1	00:15:28	1
3110738	99	36	5,21	cyclictest	123	50	irq/32-eth0	21:25:28	0
3110738	99	36	28,5	cyclictest	3176351	-21	cron	21:45:01	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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