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 Sun May 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
3318524	2	143	0,2	sleep3	47	1	rcuc/3	12:15:59	3
3306883	2	63	0,3	sleep3	75	-21	kworker/3:1+events	12:05:43	3
3008893	99	61	56,4	cyclictest	2649202	-21	kworker/u8:2+flush-8:0	07:20:00	1
3172906	2	59	0,1	sleep1	3172910	-21	kthreadcore	09:50:47	1
3008893	99	57	50,5	cyclictest	3254380	-21	kworker/u8:3+events_unbound	11:45:50	1
3008893	99	57	48,6	cyclictest	3100012	-21	latency_hist	08:40:00	1
3215317	2	56	0,4	chrt	0	-21	swapper/0	10:35:43	0
3008893	99	56	48,5	cyclictest	1913152	-21	kworker/u8:0+events_unbound	08:50:50	1
3008891	99	52	40,9	cyclictest	3337968	-21	ntpq	12:35:48	0
3008893	99	50	45,4	cyclictest	1913152	-21	kworker/u8:0+flush-8:0	08:20:55	1
3008893	99	50	45,3	cyclictest	3035703	-21	kworker/u8:3+events_unbound	07:40:00	1
3008893	99	50	43,5	cyclictest	3150006	-21	kworker/u8:3+flush-8:0	10:25:52	1
3008893	99	50	43,5	cyclictest	3150006	-21	kworker/u8:3+flush-8:0	10:25:51	1
3008891	99	49	38,8	cyclictest	3025585	-21	latency_hist	07:25:01	0
3027959	2	47	0,1	chrt	3027962	-21	kthreadcore	07:25:45	1
3284801	2	46	0,1	sleep0	3284803	-21	cat	11:45:39	0
3008891	99	46	37,7	cyclictest	3029643	-21	ntpq	07:25:49	0
3008891	99	46	35,8	cyclictest	3263408	-21	ntpq	11:20:50	0
3008891	99	45	34,8	cyclictest	3178714	-21	ntpq	09:55:48	0
3008893	99	44	38,4	cyclictest	3254380	-21	kworker/u8:3+flush-8:0	11:25:52	1
3008893	99	43	37,4	cyclictest	1913152	-21	kworker/u8:0+events_unbound	07:55:49	1
3041246	2	42	0,1	chrt	3041247	-21	/usr/sbin/munin	07:40:41	0
3041246	2	42	0,1	chrt	3041247	-21	/usr/sbin/munin	07:40:41	0
3008897	99	42	33,7	cyclictest	1704890	-21	systemd-journal	09:53:59	2
3008893	99	42	37,3	cyclictest	1913152	-21	kworker/u8:0+flush-8:0	07:50:43	1
3008893	99	42	36,4	cyclictest	3294725	-21	diskstats	11:55:40	1
3008893	99	42	36,3	cyclictest	3199663	-21	kworker/u8:1+flush-8:0	11:30:45	1
3008893	99	42	33,6	cyclictest	3090389	-21	/usr/sbin/munin	08:30:53	1
3232848	2	41	0,2	sleep2	37	1	rcuc/2	10:50:47	2
3008893	99	41	36,3	cyclictest	3104677	-21	kworker/u8:2+flush-8:0	10:20:43	1
3008891	99	41	34,5	cyclictest	1704890	-21	systemd-journal	07:59:59	0
3008891	99	41	31,8	cyclictest	3313038	-21	ntpq	12:10:53	0
3008891	99	41	31,8	cyclictest	3074423	-21	ntpq	08:10:51	0
3008891	99	41	31,8	cyclictest	3049802	-21	ntpq	07:45:52	0
3008897	99	40	27,11	cyclictest	3035702	-21	true	07:35:00	2
3008893	99	40	35,4	cyclictest	1913152	-21	kworker/u8:0+events_unbound	10:00:49	1
3008893	99	40	33,5	cyclictest	1704890	-21	systemd-journal	09:09:58	1
3008893	99	40	32,6	cyclictest	3199663	-21	kworker/u8:1+events_unbound	11:35:52	1
3008893	99	40	32,6	cyclictest	3150006	-21	kworker/u8:3+flush-8:0	09:35:35	1
3008891	99	40	29,9	cyclictest	3124177	-21	ntpq	09:00:52	0
3008891	99	40	29,9	cyclictest	3124177	-21	ntpq	09:00:51	0
3146576	2	39	0,1	sleep0	3146582	-21	tr	09:25:46	0
3008897	99	39	33,4	cyclictest	3284078	-21	apt-get	11:45:00	2
3008893	99	39	34,4	cyclictest	2649202	-21	kworker/u8:2+flush-8:0	07:10:43	1
3008893	99	39	32,5	cyclictest	3273834	-21	kworker/u8:0+flush-8:0	12:20:41	1
3008893	99	39	32,5	cyclictest	3104677	-21	kworker/u8:2+flush-8:0	09:30:56	1
3008893	99	39	28,8	cyclictest	3144821	-21	apt-get	09:25:00	1
3008897	99	38	23,13	cyclictest	3165443	-21	fschecks_time	09:45:41	2
3008893	99	38	31,6	cyclictest	3199663	-21	kworker/u8:1+flush-8:0	10:30:57	1
3008893	99	38	31,5	cyclictest	3239362	-21	kworker/u8:0+events_unbound	11:00:53	1
3008891	99	38	32,4	cyclictest	3199663	-21	kworker/u8:1+flush-8:0	10:40:46	0
3008891	99	38	30,6	cyclictest	3079339	-21	ntpq	08:15:49	0
3008891	99	38	28,7	cyclictest	3328738	-21	latency_hist	12:30:01	0
3008891	99	38	25,10	cyclictest	3084265	-21	ntpq	08:20:51	0
3008897	99	37	23,12	cyclictest	3264602	-21	aten2_r5power_c	11:25:37	2
3008893	99	37	33,2	cyclictest	1913152	-21	kworker/u8:0+events_unbound	08:00:40	1
3008893	99	37	32,4	cyclictest	3104677	-21	kworker/u8:2+flush-8:0	08:45:47	1
3008893	99	37	31,4	cyclictest	3199663	-21	kworker/u8:1+events_unbound	11:10:40	1
3008893	99	37	30,5	cyclictest	2649202	-21	kworker/u8:2+flush-8:0	07:20:44	1
3008893	99	37	29,5	cyclictest	1913152	-21	kworker/u8:0+flush-8:0	08:05:50	1
3008891	99	37	28,7	cyclictest	1704890	-21	systemd-journal	11:15:00	0
3076034	2	36	0,6	sleep2	0	-21	swapper/2	08:15:42	2
3008893	99	36	32,3	cyclictest	3150006	-21	kworker/u8:3+flush-8:0	09:45:46	1
3008893	99	36	31,3	cyclictest	3254380	-21	kworker/u8:3+events_unbound	12:05:53	1
3008893	99	36	31,3	cyclictest	3199663	-21	kworker/u8:1+events_unbound	10:55:45	1
3008893	99	36	31,3	cyclictest	3031760	-21	irqrtprio	07:30:44	1
3008893	99	36	29,6	cyclictest	2649202	-21	kworker/u8:2+flush-8:0	08:25:50	1
3008893	99	36	27,6	cyclictest	1704890	-21	systemd-journal	10:42:59	1
3008891	99	36	26,8	cyclictest	3140438	-21	diskstats	09:20:40	0
3008891	99	36	26,7	cyclictest	3120051	-21	latency_hist	09:00:01	0
3008897	99	35	19,13	cyclictest	3304712	-21	fschecks_time	12:05:39	2
3008893	99	35	28,5	cyclictest	3254380	-21	kworker/u8:3+flush-8:0	12:15:41	1
3008893	99	35	28,5	cyclictest	1913152	-21	kworker/u8:0+flush-8:0	07:40:51	1
3008893	99	35	28,5	cyclictest	1913152	-21	kworker/u8:0+flush-8:0	07:40:51	1
3008893	99	35	27,6	cyclictest	3254380	-21	kworker/u8:3+events_unbound	12:00:51	1
3008893	99	35	27,6	cyclictest	1913152	-21	kworker/u8:0+flush-8:0	08:40:56	1
3008891	99	35	26,7	cyclictest	3258465	-21	ntpq	11:15:50	0
3008891	99	35	26,7	cyclictest	3031290	-21	diskstats	07:30:41	0
3008891	99	35	25,8	cyclictest	3329005	-21	/usr/sbin/munin	12:30:48	0
3008897	99	34	3,24	cyclictest	3289563	-21	apt-get	11:50:38	2
3008893	99	34	30,3	cyclictest	3254380	-21	kworker/u8:3+flush-8:0	11:15:39	1
3008893	99	34	29,4	cyclictest	3254380	-21	kworker/u8:3+flush-8:0	11:40:53	1
3008893	99	34	29,3	cyclictest	1913152	-21	kworker/u8:0+flush-8:0	09:10:46	1
3008893	99	34	28,4	cyclictest	3138996	-21	ntpq	09:15:51	1
3008893	99	34	24,8	cyclictest	3228707	-21	ntpq	10:45:51	1
3008893	99	34	22,9	cyclictest	1704890	-21	systemd-journal	08:15:00	1
3008891	99	34	29,3	cyclictest	1913152	-21	kworker/u8:0+events_unbound	08:35:46	0
3100684	2	33	0,4	sleep2	37	1	rcuc/2	08:40:41	2
3008897	99	33	6,10	cyclictest	3284803	2	cat	11:45:38	2
3008897	99	33	27,4	cyclictest	3254380	-21	kworker/u8:3+flush-8:0	11:15:49	2
3008897	99	33	20,12	cyclictest	3190389	-21	fschecks_time	10:10:42	2
3008893	99	33	29,3	cyclictest	3119738	-21	kworker/u8:1+events_unbound	09:25:56	1
3008893	99	33	27,4	cyclictest	3333425	-21	kworker/u8:2+events_unbound	12:35:47	1
3008893	99	33	26,5	cyclictest	3199663	-21	kworker/u8:1+flush-8:0	12:10:54	1
3008893	99	33	26,5	cyclictest	1913152	-21	kworker/u8:0+events_unbound	08:15:37	1
3008893	99	33	20,10	cyclictest	1704890	-21	systemd-journal	10:35:59	1
3008891	99	33	9,22	cyclictest	3139916	-21	kworker/0:2+events	10:10:51	0
3008891	99	33	24,7	cyclictest	3243575	-21	ntpq	11:00:49	0
3008891	99	33	11,20	cyclictest	3139916	-21	kworker/0:2+events	10:20:39	0
3008891	99	33	0,27	cyclictest	3003864	-21	kworker/0:0+events	07:10:39	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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