OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack5slot4s.osadl.org (updated Mon Aug 31, 2026 12:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3097960	2	221	0,5	sleep3	0	-21	swapper/3	09:32:46	3
2952596	2	93	0,5	chrt	2952593	-21	latency_hist	07:10:01	0
2952682	99	52	47,3	cyclictest	3222396	-21	kworker/u8:1+events_unbound	11:40:00	1
2952675	99	49	40,6	cyclictest	3053850	-21	latency_hist	08:50:00	0
2952675	99	49	40,6	cyclictest	3053850	-21	latency_hist	08:50:00	0
2952682	99	48	42,4	cyclictest	2895586	-21	kworker/u8:0+flush-8:0	07:45:01	1
2990748	2	47	0,5	sleep0	0	-21	swapper/0	07:47:37	0
2952682	99	46	39,5	cyclictest	2974654	-21	kworker/u8:3+flush-8:0	07:57:32	1
2952682	99	45	31,10	cyclictest	275	-21	systemd-journal	08:35:00	1
2952682	99	44	38,4	cyclictest	2154645	-21	kworker/u8:1+events_unbound	09:12:33	1
2952682	99	43	36,5	cyclictest	3103528	-21	kworker/u8:3+flush-8:0	09:42:48	1
2952682	99	42	37,4	cyclictest	2154645	-21	kworker/u8:1+events_unbound	08:40:00	1
2952682	99	42	37,3	cyclictest	2974654	-21	kworker/u8:3+events_unbound	08:17:47	1
2952682	99	41	36,4	cyclictest	2154645	-21	kworker/u8:1+flush-8:0	07:52:49	1
2952682	99	41	36,3	cyclictest	2154645	-21	kworker/u8:1+events_unbound	07:17:32	1
2952682	99	41	34,5	cyclictest	3103252	-21	latency_hist	09:40:01	1
2952682	99	41	29,6	cyclictest	3162631	-21	kworker/u8:1+events_unbound	11:07:31	1
2947751	2	41	4,33	sleep2	0	-21	swapper/2	07:05:54	2
2952682	99	40	34,4	cyclictest	3034269	-21	kworker/u8:2+flush-8:0	08:57:43	1
2952682	99	40	33,5	cyclictest	3103528	-21	kworker/u8:3+flush-8:0	10:02:30	1
2952682	99	40	33,5	cyclictest	2154645	-21	kworker/u8:1+flush-8:0	08:22:42	1
2952675	99	40	32,5	cyclictest	275	-21	systemd-journal	11:25:00	0
2952682	99	39	34,4	cyclictest	3083687	-21	kworker/u8:0+flush-8:0	10:07:32	1
2952682	99	39	33,4	cyclictest	3198052	-21	kworker/u8:2+flush-8:0	11:32:43	1
2952682	99	39	33,4	cyclictest	3103528	-21	kworker/u8:3+events_unbound	12:17:48	1
2952682	99	39	33,4	cyclictest	2154645	-21	kworker/u8:1+events_unbound	09:25:01	1
2952682	99	39	32,5	cyclictest	3103528	-21	kworker/u8:3+flush-8:0	10:52:46	1
2952682	99	39	32,5	cyclictest	2895586	-21	kworker/u8:0+flush-8:0	08:07:48	1
2952682	99	38	32,4	cyclictest	3272787	-21	apt-get	12:31:34	1
2952682	99	38	32,4	cyclictest	3198052	-21	kworker/u8:2+flush-8:0	11:22:39	1
2952682	99	38	32,4	cyclictest	2154645	-21	kworker/u8:1+flush-8:0	07:47:30	1
2952682	99	38	31,5	cyclictest	3266897	-21	kworker/u8:0+flush-8:0	12:27:42	1
3134793	2	37	0,4	sleep3	47	1	rcuc/3	10:12:35	3
2952682	99	37	31,4	cyclictest	3034269	-21	kworker/u8:2+events_unbound	09:07:48	1
2952682	99	37	31,4	cyclictest	2895586	-21	kworker/u8:0+flush-8:0	08:42:33	1
2952682	99	37	29,5	cyclictest	3257083	-21	kworker/u8:4+flush-8:0	12:15:01	1
2952675	99	37	32,4	cyclictest	3118030	-21	kworker/u8:2+events_unbound	10:17:35	0
2952682	99	36	28,6	cyclictest	2154645	-21	kworker/u8:1+flush-8:0	09:02:42	1
2947745	2	36	4,9	sleep1	0	-21	swapper/1	07:05:49	1
2952684	99	35	29,4	cyclictest	3257083	-21	kworker/u8:4+flush-8:0	12:22:49	2
2952682	99	35	30,4	cyclictest	2154645	-21	kworker/u8:1+events_unbound	07:22:44	1
2952682	99	35	28,5	cyclictest	3048728	-21	kworker/u8:3+flush-8:0	08:55:00	1
2952682	99	35	27,6	cyclictest	3093785	-21	/usr/sbin/munin	09:32:42	1
2952682	99	35	26,7	cyclictest	2970628	-21	irqrtprio	07:27:36	1
2952675	99	35	26,6	cyclictest	275	-21	systemd-journal	11:50:01	0
2952684	99	34	28,4	cyclictest	2974219	-21	unixbench_singl	07:27:49	2
2952682	99	34	29,4	cyclictest	2895586	-21	kworker/u8:0+events_unbound	07:32:46	1
2952682	99	34	29,3	cyclictest	3222396	-21	kworker/u8:1+flush-8:0	11:57:39	1
2952682	99	34	28,4	cyclictest	3083687	-21	kworker/u8:0+flush-8:0	09:57:57	1
2952682	99	33	28,4	cyclictest	3162631	-21	kworker/u8:1+events_unbound	11:12:42	1
2952682	99	33	28,3	cyclictest	3252306	-21	idleruntime-cro	12:10:00	1
2952682	99	33	24,6	cyclictest	275	-21	systemd-journal	09:51:35	1
2952675	99	33	24,6	cyclictest	3227623	-21	latency_hist	11:45:01	0
2952682	99	32	28,2	cyclictest	3031704	-21	kthreadcore	08:27:39	1
2952682	99	32	26,4	cyclictest	3083687	-21	kworker/u8:0+events_unbound	11:02:38	1
2952682	99	32	26,4	cyclictest	3048728	-21	kworker/u8:3+events_unbound	08:47:49	1
2952682	99	32	26,4	cyclictest	3048728	-21	kworker/u8:3+events_unbound	08:47:49	1
2952682	99	32	26,4	cyclictest	2974654	-21	kworker/u8:3+flush-8:0	08:12:41	1
2952682	99	32	25,5	cyclictest	3162805	-21	latency_hist	10:40:01	1
2952675	99	32	27,3	cyclictest	3257913	-21	cpuspeed_turbos	12:17:32	0
2952675	99	32	26,4	cyclictest	3018978	-21	apt-get	08:15:00	0
2952684	99	31	1,28	cyclictest	3038780	-21	unixbench_multi	08:32:48	2
2952682	99	31	26,3	cyclictest	3222396	-21	kworker/u8:1+flush-8:0	11:52:41	1
2952682	99	31	25,5	cyclictest	3103528	-21	kworker/u8:3+flush-8:0	10:57:33	1
2952682	99	31	25,5	cyclictest	2154645	-21	kworker/u8:1+flush-8:0	09:27:35	1
2952682	99	31	24,5	cyclictest	3198052	-21	kworker/u8:2+flush-8:0	11:47:40	1
2952682	99	31	24,5	cyclictest	2895586	-21	kworker/u8:0+flush-8:0	08:02:42	1
2952675	99	31	26,3	cyclictest	3157898	-21	systemd-run	10:35:00	0
2952675	99	31	23,6	cyclictest	3242431	-21	latency_hist	12:00:00	0
2952675	99	31	21,8	cyclictest	2988552	-21	ntpq	07:42:40	0
2952675	99	31	20,9	cyclictest	275	-21	systemd-journal	08:40:00	0
2952682	99	30	25,4	cyclictest	3083687	-21	kworker/u8:0+events_unbound	09:47:32	1
2952682	99	30	24,4	cyclictest	3198052	-21	kworker/u8:2+flush-8:0	11:17:39	1
2952682	99	30	24,4	cyclictest	275	-21	systemd-journal	09:17:34	1
2952675	99	30	26,2	cyclictest	3162789	-21	cron	10:40:00	0
3139399	2	29	0,2	sleep1	0	-21	swapper/1	10:17:35	1
2952682	99	29	24,4	cyclictest	3103528	-21	kworker/u8:3+flush-8:0	10:47:44	1
2952682	99	29	23,4	cyclictest	3103528	-21	kworker/u8:3+flush-8:0	12:02:44	1
2952682	99	29	23,4	cyclictest	3103528	-21	kworker/u8:3+flush-8:0	12:02:44	1
2952682	99	29	23,4	cyclictest	2984409	-21	systemd-run	07:40:00	1
2952682	99	29	18,7	cyclictest	3103528	-21	kworker/u8:3+flush-8:0	10:27:30	1
2952675	99	29	25,3	cyclictest	3228275	-21	cpuspeed_turbos	11:47:32	0
2952675	99	29	24,4	cyclictest	3276637	-21	needreboot	12:32:41	0
2952675	99	29	22,5	cyclictest	3163230	-21	/usr/sbin/munin	10:42:47	0
2952684	99	28	24,2	cyclictest	3028834	-21	unixbench_multi	08:22:49	2
2952684	99	28	24,2	cyclictest	2953129	-21	aten2_r5power_c	07:12:31	2
2952682	99	28	23,4	cyclictest	3103528	-21	kworker/u8:3+events_unbound	10:22:44	1
2952682	99	28	23,4	cyclictest	3083687	-21	kworker/u8:0+flush-8:0	10:12:45	1
2952682	99	28	23,3	cyclictest	3263283	-21	irqcore	12:22:36	1
2952682	99	28	22,4	cyclictest	3162631	-21	kworker/u8:1+events_unbound	10:42:42	1
2952682	99	28	21,5	cyclictest	275	-21	systemd-journal	11:44:34	1
2952675	99	28	23,3	cyclictest	2154645	-21	kworker/u8:1+flush-8:0	07:22:39	0
2952675	99	28	22,4	cyclictest	3269820	-21	sed	12:27:37	0
2952675	99	28	22,4	cyclictest	3074022	-21	apt-get	09:12:27	0
2952675	99	28	21,5	cyclictest	3083687	-21	kworker/u8:0+flush-8:0	09:46:05	0
2952675	99	28	21,4	cyclictest	1	-21	systemd	09:01:34	0
2952675	99	28	19,4	cyclictest	2895586	-21	kworker/u8:0+flush-8:0	07:37:36	0
2952684	99	27	24,2	cyclictest	3074337	-21	fschecks_time	09:12:33	2
2952684	99	27	23,2	cyclictest	3014032	-21	cron	08:10:00	2
2952684	99	27	22,3	cyclictest	3243100	-21	grep	12:02:31	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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