OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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
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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
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackeslot4s.osadl.org (updated Mon Jul 13, 2026 12:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2962142	99	38	32,4	cyclictest	3142805	-21	latency_hist	10:05:01	1
2962142	99	34	31,2	cyclictest	3201150	-21	kworker/u8:1+flush-259:0	11:35:00	1
2962137	99	34	31,2	cyclictest	3210799	-21	kworker/u8:2+flush-259:0	11:55:00	0
2962142	99	32	26,4	cyclictest	335557	-21	systemd-journal	08:15:01	1
2962147	99	31	24,5	cyclictest	3003328	-21	latency_hist	07:50:01	3
2962137	99	30	21,8	cyclictest	2967311	-21	kworker/u8:1+flush-259:0	08:05:00	0
2962147	99	29	25,3	cyclictest	3178992	-21	kworker/u8:2+flush-259:0	10:40:01	3
2962144	99	28	25,2	cyclictest	2929507	-21	kworker/u8:5+flush-259:0	07:15:25	2
2962144	99	26	22,3	cyclictest	3267256	-21	kworker/u8:4+events_unbound	12:05:29	2
2962144	99	26	21,4	cyclictest	335557	-21	systemd-journal	08:00:01	2
2962142	99	26	21,3	cyclictest	507	-21	in:imuxsock	09:14:59	1
2962137	99	26	23,2	cyclictest	507	-21	in:imuxsock	10:10:00	0
2962137	99	26	21,4	cyclictest	335557	-21	systemd-journal	10:35:01	0
2962142	99	25	20,3	cyclictest	3210799	-21	kworker/u8:2+flush-259:0	11:15:45	1
2962142	99	25	19,4	cyclictest	335557	-21	systemd-journal	09:55:00	1
2962144	99	24	20,3	cyclictest	2967311	-21	kworker/u8:1+flush-259:0	08:50:25	2
2962144	99	24	17,4	cyclictest	3039443	-21	latency_hist	08:25:01	2
2962142	99	24	21,2	cyclictest	2947008	-21	kworker/u8:0+events_unbound	07:10:01	1
2962142	99	24	21,2	cyclictest	2947008	-21	kworker/u8:0+events_unbound	07:10:00	1
2962142	99	24	20,3	cyclictest	3018645	-21	apt-get	08:03:39	1
2962142	99	24	18,3	cyclictest	3111767	-21	kworker/u8:1+events_unbound	09:50:01	1
2962144	99	23	19,3	cyclictest	3043717	-21	ntpq	08:25:22	2
2962142	99	23	19,3	cyclictest	2929507	-21	kworker/u8:5+flush-259:0	07:15:21	1
2962142	99	22	19,2	cyclictest	3201150	-21	kworker/u8:1+events_unbound	11:40:01	1
2962142	99	22	18,3	cyclictest	3267256	-21	kworker/u8:4+flush-259:0	12:05:00	1
2962142	99	22	18,3	cyclictest	3101643	-21	kworker/u8:3+events_unbound	11:25:00	1
2962142	99	22	18,3	cyclictest	3101643	-21	kworker/u8:3+events_unbound	11:12:44	1
2962142	99	22	18,3	cyclictest	3065208	-21	kworker/u8:2+events_unbound	09:29:43	1
2962142	99	22	18,3	cyclictest	3065208	-21	kworker/u8:2+events_unbound	09:29:42	1
2962142	99	22	18,3	cyclictest	3023995	-21	kworker/u8:0+events_unbound	09:22:44	1
2962142	99	22	16,4	cyclictest	335557	-21	systemd-journal	07:15:00	1
2962137	99	22	18,2	cyclictest	3101643	-21	kworker/u8:3+flush-259:0	10:25:17	0
2962147	99	21	17,2	cyclictest	0	-21	swapper/3	09:35:00	3
2962147	99	21	17,2	cyclictest	0	-21	swapper/3	09:34:59	3
2962147	99	21	14,5	cyclictest	3148135	-21	cp	10:10:01	3
2962144	99	21	18,2	cyclictest	3178992	-21	kworker/u8:2+events_unbound	10:40:13	2
2962144	99	21	18,2	cyclictest	3023995	-21	kworker/u8:0+events_unbound	08:49:59	2
2962142	99	21	17,3	cyclictest	3101643	-21	kworker/u8:3+events_unbound	09:55:43	1
2962142	99	21	15,4	cyclictest	335557	-21	systemd-journal	10:57:43	1
2962147	99	20	15,4	cyclictest	3054060	-21	ntpq	08:35:22	3
2962144	99	20	16,3	cyclictest	3179477	-21	gpgv	10:40:01	2
2962144	99	20	16,3	cyclictest	3023995	-21	kworker/u8:0+events_unbound	09:05:16	2
2962142	99	20	17,2	cyclictest	3278657	-21	irqcore	12:15:17	1
2962142	99	20	17,2	cyclictest	3158718	-21	kworker/u8:0+flush-259:0	10:35:23	1
2962142	99	20	13,5	cyclictest	3201153	-21	diskstats	11:00:14	1
2962137	99	20	15,4	cyclictest	335557	-21	systemd-journal	11:33:43	0
2962137	99	20	14,4	cyclictest	3252185	-21	turbostat	11:50:00	0
2962137	99	20	1,1	cyclictest	3096464	-21	turbostat	09:20:00	0
2962147	99	19	16,2	cyclictest	3148642	-21	apt-get	10:10:12	3
2962147	99	19	13,4	cyclictest	335557	-21	systemd-journal	10:41:43	3
2962144	99	19	16,2	cyclictest	3210799	-21	kworker/u8:2+flush-259:0	11:22:19	2
2962142	99	19	16,2	cyclictest	3178992	-21	kworker/u8:2+events_unbound	10:49:43	1
2962142	99	19	16,2	cyclictest	3101643	-21	kworker/u8:3+events_unbound	11:38:44	1
2962142	99	19	16,2	cyclictest	3065208	-21	kworker/u8:2+events_unbound	08:59:42	1
2962142	99	19	16,2	cyclictest	3023995	-21	kworker/u8:0+events_unbound	08:49:55	1
2962142	99	19	15,3	cyclictest	3101643	-21	kworker/u8:3+events_unbound	10:51:43	1
2962142	99	19	15,3	cyclictest	3101643	-21	kworker/u8:3+events_unbound	10:21:44	1
2962142	99	19	15,3	cyclictest	3101643	-21	kworker/u8:3+events_unbound	10:10:45	1
2962142	99	19	15,3	cyclictest	3023995	-21	kworker/u8:0+events_unbound	08:15:29	1
2962137	99	19	16,2	cyclictest	3267256	-21	kworker/u8:4+flush-259:0	12:04:57	0
2962137	99	19	16,2	cyclictest	3201150	-21	kworker/u8:1+events_unbound	11:35:15	0
2962147	99	18	15,2	cyclictest	3075473	-21	cut	09:00:01	3
2962147	99	18	15,2	cyclictest	2929507	-21	kworker/u8:5+flush-259:0	07:30:28	3
2962144	99	18	15,2	cyclictest	2967311	-21	kworker/u8:1+flush-259:0	07:25:20	2
2962144	99	18	14,3	cyclictest	3065208	-21	kworker/u8:2+events_unbound	08:55:17	2
2962144	99	18	13,4	cyclictest	3267255	-21	kworker/u8:3+flush-259:0	12:10:45	2
2962142	99	18	15,2	cyclictest	3195587	-21	kworker/u8:0+flush-259:0	11:05:21	1
2962142	99	18	15,2	cyclictest	3111767	-21	kworker/u8:1+events_unbound	10:19:43	1
2962142	99	18	15,2	cyclictest	2967311	-21	kworker/u8:1+flush-259:0	08:44:44	1
2962142	99	18	15,2	cyclictest	2967311	-21	kworker/u8:1+events_unbound	07:25:14	1
2962142	99	18	14,3	cyclictest	3023995	-21	kworker/u8:0+events_unbound	08:50:15	1
2962142	99	18	14,2	cyclictest	3231622	-21	sh	11:30:00	1
2962147	99	17	14,2	cyclictest	0	-21	swapper/3	09:15:00	3
2962147	99	17	12,3	cyclictest	335557	-21	systemd-journal	12:13:46	3
2962144	99	17	15,1	cyclictest	3111767	-21	kworker/u8:1+events_unbound	09:39:44	2
2962144	99	17	14,2	cyclictest	3283522	-21	kworker/u8:2+flush-259:0	12:20:48	2
2962144	99	17	14,2	cyclictest	3210799	-21	kworker/u8:2+flush-259:0	11:55:20	2
2962144	99	17	14,2	cyclictest	3210799	-21	kworker/u8:2+flush-259:0	11:25:17	2
2962144	99	17	14,2	cyclictest	3013852	-21	kworker/u8:3+flush-259:0	08:05:25	2
2962144	99	17	12,4	cyclictest	335557	-21	systemd-journal	11:45:00	2
2962144	99	17	12,4	cyclictest	3199907	-21	ntpq	10:55:22	2
2962142	99	17	14,2	cyclictest	3275373	-21	kthreadcore	12:10:18	1
2962142	99	17	14,2	cyclictest	2967311	-21	kworker/u8:1+events_unbound	07:55:25	1
2962142	99	17	13,3	cyclictest	3267256	-21	kworker/u8:4+events_unbound	12:35:33	1
2962142	99	17	13,3	cyclictest	3267255	-21	kworker/u8:3+events_unbound	12:05:21	1
2962142	99	17	13,3	cyclictest	3111767	-21	kworker/u8:1+events_unbound	10:07:45	1
2962142	99	17	13,3	cyclictest	3111767	-21	kworker/u8:1+events_unbound	09:34:50	1
2962142	99	17	13,3	cyclictest	3111767	-21	kworker/u8:1+events_unbound	09:34:49	1
2962142	99	17	11,4	cyclictest	335557	-21	systemd-journal	09:44:59	1
2962137	99	17	14,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	11:56:24	0
2962137	99	17	14,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	10:15:10	0
2962137	99	17	12,4	cyclictest	3085283	-21	ntpq	09:05:21	0
2962147	99	16	14,1	cyclictest	3096468	-21	idleruntime-cro	09:19:59	3
2962144	99	16	12,3	cyclictest	3111767	-21	kworker/u8:1+events_unbound	09:50:03	2
2962144	99	16	12,3	cyclictest	3101643	-21	kworker/u8:3+events_unbound	11:30:24	2
2962144	99	16	12,3	cyclictest	3023995	-21	kworker/u8:0+flush-259:0	09:15:23	2
2962142	99	16	13,2	cyclictest	3076579	-21	irqcore	09:00:17	1
2962142	99	16	13,2	cyclictest	3036844	-21	kthreadcore	08:20:19	1
2962142	99	16	13,2	cyclictest	2988101	-21	kworker/u8:2+events_unbound	07:35:14	1
2962142	99	16	13,2	cyclictest	2967311	-21	kworker/u8:1+flush-259:0	07:20:15	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2021-09-01 - 00:34