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 Jun 17, 2026 00:43:29)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3171022	99	59	46,10	cyclictest	3313081	-21	munin-run	00:00:01	0
3171023	99	55	43,9	cyclictest	3307911	-21	sshd	23:50:28	1
3171022	99	52	6,36	cyclictest	3336006	-21	ssh	00:35:29	0
3171024	99	48	41,3	cyclictest	0	-21	swapper/2	21:50:39	2
3171022	99	47	23,17	cyclictest	15	1	ktimers/0	23:00:31	0
3171024	99	46	39,4	cyclictest	3260131	-21	idleruntime-cro	22:35:01	2
3171023	99	45	7,34	cyclictest	3214480	-21	ssh	21:20:42	1
3171022	99	45	22,15	cyclictest	15	1	ktimers/0	20:25:28	0
3171023	99	44	36,4	cyclictest	0	-21	swapper/1	23:55:27	1
3171023	99	43	5,29	cyclictest	3332836	-21	ssh	00:30:30	1
3171023	99	43	34,6	cyclictest	3172528	-21	systemd-run	19:15:02	1
3171023	99	43	3,29	cyclictest	3217551	-21	ssh	21:25:36	1
3171023	99	43	18,3	cyclictest	17	1	rcu_preempt	21:45:28	1
3171024	99	42	3,33	cyclictest	3214378	-21	ssh	21:20:35	2
3171024	99	42	30,8	cyclictest	3273414	-21	latency	22:55:24	2
3171023	99	42	34,5	cyclictest	3244628	-21	latency_hist	22:10:02	1
3171023	99	42	34,5	cyclictest	3244628	-21	latency_hist	22:10:02	1
3171023	99	42	33,5	cyclictest	3224114	-21	timerandwakeup	21:35:38	1
3171023	99	42	25,3	cyclictest	17	1	rcu_preempt	19:40:27	1
3171022	99	42	37,3	cyclictest	0	-21	swapper/0	21:45:27	0
3171022	99	42	19,20	cyclictest	3239517	-21	rm	22:00:35	0
3171022	99	42	19,20	cyclictest	3239517	-21	rm	22:00:35	0
3171024	99	41	34,4	cyclictest	3322579	-21	latency_hist	00:15:02	2
3171023	99	41	4,28	cyclictest	3236199	-21	ssh	21:55:27	1
3171023	99	41	22,4	cyclictest	17	1	rcu_preempt	21:40:32	1
3171022	99	41	3,30	cyclictest	3223744	-21	ssh	21:35:30	0
3171022	99	41	31,5	cyclictest	0	-21	swapper/0	00:00:26	0
3171022	99	41	24,12	cyclictest	126	50	irq/32-eth0	23:25:34	0
3171024	99	40	33,4	cyclictest	0	-21	swapper/2	22:25:27	2
3171024	99	40	32,4	cyclictest	3334965	-21	kworker/u8:1	00:35:01	2
3171024	99	40	31,6	cyclictest	3247682	-21	true	22:15:01	2
3171024	99	40	31,6	cyclictest	3247682	-21	true	22:15:01	2
3171024	99	40	30,6	cyclictest	3263820	-21	cpuspeed	22:40:19	2
3171023	99	40	3,26	cyclictest	3317243	-21	ssh	00:05:31	1
3171023	99	40	32,5	cyclictest	3204525	-21	fschecks_count	21:00:18	1
3171023	99	40	31,6	cyclictest	1	-21	systemd	19:20:02	1
3171022	99	40	34,4	cyclictest	3280365	-21	timerwakeupswit	23:05:43	0
3171022	99	40	34,4	cyclictest	3247778	-21	latency_hist	22:15:02	0
3171022	99	40	34,4	cyclictest	3247778	-21	latency_hist	22:15:02	0
3171024	99	39	32,3	cyclictest	3278878	-21	kworker/u8:9-xprtiod	00:00:01	2
3171024	99	39	31,4	cyclictest	3171027	-21	kworker/u8:10-rpciod	19:20:02	2
3171024	99	39	28,7	cyclictest	3313177	-21	cups-browsed	00:37:50	2
3171023	99	39	31,5	cyclictest	1000	-21	mta-sts-daemon	23:30:30	1
3171023	99	39	31,4	cyclictest	0	-21	swapper/1	00:35:31	1
3171023	99	39	30,4	cyclictest	0	-21	swapper/1	23:35:26	1
3171022	99	39	30,7	cyclictest	3275754	-21	systemd-run	23:00:01	0
3171022	99	39	2,34	cyclictest	3324121	-21	users	00:15:41	0
3171024	99	38	31,4	cyclictest	3199536	-21	kworker/u8:13+xprtiod	21:50:02	2
3171024	99	38	30,5	cyclictest	3327156	-21	ssh	00:20:41	2
3171024	99	38	30,5	cyclictest	3198056	-21	latency_hist	20:40:01	2
3171024	99	38	29,4	cyclictest	0	-21	swapper/2	22:45:28	2
3171024	99	38	2,27	cyclictest	3248745	-21	ssh	22:15:33	2
3171023	99	38	5,25	cyclictest	3220561	-21	ssh	21:30:29	1
3171023	99	38	31,4	cyclictest	3210272	-21	latency_hist	21:15:02	1
3171023	99	38	28,7	cyclictest	420	-21	avahi-daemon	21:19:58	1
3171023	99	38	28,7	cyclictest	1003	-21	mta-sts-daemon	22:45:01	1
3171022	99	38	5,23	cyclictest	3316267	-21	kworker/u8:10+rpciod	00:30:29	0
3171022	99	38	3,32	cyclictest	3326633	-21	ssh	00:20:29	0
3171024	99	37	29,5	cyclictest	3204016	-21	sendmail	21:00:01	2
3171024	99	37	28,6	cyclictest	3208547	-21	sed	21:10:39	2
3171023	99	37	9,3	cyclictest	17	1	rcu_preempt	00:15:31	1
3171023	99	37	31,4	cyclictest	0	-21	swapper/1	22:25:29	1
3171023	99	37	30,4	cyclictest	3285040	-21	ssh	23:15:01	1
3171023	99	37	28,6	cyclictest	3279483	-21	fschecks_time	23:05:22	1
3171022	99	37	30,4	cyclictest	3254828	-21	needreboot	22:25:25	0
3171022	99	37	27,7	cyclictest	3329949	-21	find	00:25:35	0
3171022	99	37	26,9	cyclictest	15	1	ktimers/0	23:20:25	0
3171022	99	37	15,16	cyclictest	126	50	irq/32-eth0	23:50:30	0
3171024	99	36	28,5	cyclictest	0	-21	swapper/2	19:15:01	2
3171023	99	36	3,28	cyclictest	3251916	-21	ssh	22:20:32	1
3171023	99	36	13,17	cyclictest	421	-21	dbus-daemon	20:50:02	1
3171023	99	36	1,28	cyclictest	3258092	-21	ssh	22:30:30	1
3171022	99	36	27,7	cyclictest	3298418	-21	needreboot	23:35:24	0
3171022	99	36	2,28	cyclictest	3236185	-21	ssh	21:55:26	0
3171022	99	36	2,26	cyclictest	3267351	-21	ssh	22:45:26	0
3171024	99	35	27,5	cyclictest	421	-21	dbus-daemon	19:40:01	2
3171024	99	35	26,6	cyclictest	420	-21	avahi-daemon	20:00:35	2
3171023	99	35	26,6	cyclictest	420	-21	avahi-daemon	22:03:26	1
3171023	99	35	26,6	cyclictest	420	-21	avahi-daemon	22:03:26	1
3171023	99	35	26,6	cyclictest	1427483	-21	cups-browsed	19:37:47	1
3171023	99	35	24,3	cyclictest	26	1	rcuc/1	00:00:25	1
3171023	99	35	18,4	cyclictest	17	1	rcu_preempt	20:50:32	1
3171022	99	35	23,8	cyclictest	126	50	irq/32-eth0	00:10:29	0
3171022	99	35	1,33	cyclictest	0	-21	swapper/0	20:10:33	0
3171022	99	35	1,31	cyclictest	665	-21	snmpd	23:40:56	0
3171024	99	34	26,5	cyclictest	3281948	-21	latency_hist	23:10:01	2
3171024	99	34	26,3	cyclictest	0	-21	swapper/2	22:00:26	2
3171024	99	34	26,3	cyclictest	0	-21	swapper/2	22:00:26	2
3171023	99	34	25,5	cyclictest	3263260	-21	sendmail	22:40:01	1
3171023	99	34	14,4	cyclictest	17	1	rcu_preempt	20:20:25	1
3171022	99	34	6,20	cyclictest	126	50	irq/32-eth0	22:20:29	0
3171022	99	34	28,4	cyclictest	3235187	-21	munin-plugin-st	21:55:00	0
3171022	99	34	28,4	cyclictest	3220293	-21	kernelversion	21:30:23	0
3171022	99	34	26,4	cyclictest	0	-21	swapper/0	22:15:30	0
3171022	99	34	25,6	cyclictest	3286678	-21	head	23:15:41	0
3171022	99	34	24,8	cyclictest	15	1	ktimers/0	19:25:34	0
3171022	99	34	23,9	cyclictest	3179313	-21	needreboot	19:35:24	0
3171022	99	34	14,15	cyclictest	126	50	irq/32-eth0	21:10:26	0
3171024	99	33	28,2	cyclictest	0	-21	swapper/2	21:20:02	2
3171024	99	33	26,3	cyclictest	3183028	-21	kworker/u8:14-xprtiod	23:50:16	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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