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
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
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackeslot4s.osadl.org (updated Sun May 31, 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
3720679	99	49	45,3	cyclictest	3705376	-21	kworker/u8:1+events_unbound	08:10:13	1
3720679	99	47	44,2	cyclictest	3887166	-21	gpgv	09:50:00	1
3720679	99	46	43,2	cyclictest	3980995	-21	kworker/u8:4+events_unbound	11:40:14	1
3720676	99	45	39,4	cyclictest	3828853	-21	ntpq	08:50:21	0
3720684	99	44	38,4	cyclictest	3803798	-21	kworker/u8:0+flush-259:0	08:40:16	2
3720685	99	43	40,2	cyclictest	3803798	-21	kworker/u8:0+flush-259:0	09:00:22	3
3720679	99	43	39,3	cyclictest	3980995	-21	kworker/u8:4+events_unbound	11:20:19	1
3720684	99	41	36,3	cyclictest	4001540	-21	kworker/u8:2+flush-259:0	12:05:19	2
3720685	99	40	37,2	cyclictest	3845171	-21	kworker/u8:3+flush-259:0	09:20:00	3
3720679	99	39	36,2	cyclictest	3865826	-21	kworker/u8:2+events_unbound	10:25:23	1
3720679	99	39	36,2	cyclictest	3845171	-21	kworker/u8:3+events_unbound	09:25:22	1
3720679	99	39	36,2	cyclictest	3768057	-21	kworker/u8:0+flush-259:0	08:00:23	1
3720679	99	39	36,2	cyclictest	3705376	-21	kworker/u8:1+flush-259:0	07:10:24	1
3720679	99	39	36,2	cyclictest	3705376	-21	kworker/u8:1+events_unbound	08:00:00	1
3720679	99	39	36,2	cyclictest	3705376	-21	kworker/u8:1+events_unbound	07:40:24	1
3720679	99	39	36,2	cyclictest	3705376	-21	kworker/u8:1+events_unbound	07:35:19	1
3720685	99	38	35,2	cyclictest	3959821	-21	kworker/u8:0+flush-259:0	11:10:15	3
3720679	99	38	35,2	cyclictest	3803798	-21	kworker/u8:0+flush-259:0	08:30:27	1
3720676	99	38	35,2	cyclictest	3845171	-21	kworker/u8:3+flush-259:0	09:10:26	0
3720679	99	37	34,2	cyclictest	3814279	-21	kworker/u8:2+events_unbound	08:45:25	1
3720679	99	37	34,2	cyclictest	3725798	-21	kworker/u8:2+flush-259:0	07:25:20	1
3720676	99	37	32,3	cyclictest	3959821	-21	kworker/u8:0+flush-259:0	11:10:16	0
3720685	99	36	33,2	cyclictest	3865826	-21	kworker/u8:2+events_unbound	10:25:17	3
3720679	99	36	33,2	cyclictest	3898020	-21	kworker/u8:1+events_unbound	11:00:21	1
3720679	99	36	33,2	cyclictest	3715114	-21	kworker/u8:3+flush-259:0	07:15:15	1
3720679	99	36	31,4	cyclictest	335557	-21	systemd-journal	12:10:16	1
3720685	99	35	31,3	cyclictest	4001540	-21	kworker/u8:2+flush-259:0	11:55:24	3
3720685	99	35	29,4	cyclictest	4063361	-21	latency_hist	12:40:01	3
3720679	99	35	32,2	cyclictest	3887005	-21	kworker/u8:0+events_unbound	09:55:20	1
3720679	99	35	32,2	cyclictest	3887005	-21	kworker/u8:0+events_unbound	09:55:19	1
3720679	99	35	32,2	cyclictest	3865826	-21	kworker/u8:2+events_unbound	10:05:21	1
3720679	99	35	32,2	cyclictest	3803798	-21	kworker/u8:0+events_unbound	09:05:23	1
3720679	99	35	28,5	cyclictest	3797777	-21	ntpq	08:20:20	1
3720676	99	35	31,3	cyclictest	3934515	-21	apt-get	10:35:12	0
3720679	99	34	32,2	cyclictest	4001540	-21	kworker/u8:2+flush-259:0	12:00:21	1
3720679	99	34	31,2	cyclictest	4042790	-21	kworker/u8:3+flush-259:0	12:25:20	1
3720679	99	34	31,2	cyclictest	3898020	-21	kworker/u8:1+events_unbound	11:05:22	1
3720679	99	34	31,2	cyclictest	3803798	-21	kworker/u8:0+events_unbound	09:00:20	1
3720679	99	34	31,2	cyclictest	3741848	-21	kworker/u8:4+flush-259:0	07:45:25	1
3720679	99	34	31,2	cyclictest	3741848	-21	kworker/u8:4+flush-259:0	07:45:25	1
3720685	99	33	29,3	cyclictest	3898020	-21	kworker/u8:1+flush-259:0	11:00:22	3
3720685	99	33	29,3	cyclictest	3768057	-21	kworker/u8:0+flush-259:0	08:14:38	3
3720679	99	33	31,2	cyclictest	3865826	-21	kworker/u8:2+flush-259:0	10:30:14	1
3720679	99	33	30,2	cyclictest	3865826	-21	kworker/u8:2+flush-259:0	10:20:01	1
3720679	99	33	30,2	cyclictest	3865826	-21	kworker/u8:2+events_unbound	10:20:24	1
3720676	99	33	28,4	cyclictest	3928244	-21	ntpq	10:25:21	0
3720685	99	32	27,4	cyclictest	3715114	-21	kworker/u8:3+flush-259:0	07:20:16	3
3720685	99	32	27,4	cyclictest	3705376	-21	kworker/u8:1+events_unbound	07:10:21	3
3720679	99	32	30,2	cyclictest	3934119	-21	kworker/u8:3+events_unbound	10:40:22	1
3720679	99	32	29,2	cyclictest	3793771	-21	kworker/u8:2+events_unbound	08:25:22	1
3720679	99	32	28,3	cyclictest	4012057	-21	/usr/sbin/munin	11:50:13	1
3720676	99	32	29,2	cyclictest	3898020	-21	kworker/u8:1+flush-259:0	10:05:25	0
3720676	99	32	27,4	cyclictest	3923105	-21	ntpq	10:20:21	0
3720679	99	31	26,2	cyclictest	4001540	-21	kworker/u8:2+events_unbound	12:35:28	1
3720676	99	31	27,3	cyclictest	3980995	-21	kworker/u8:4+events_unbound	11:40:24	0
3720685	99	30	27,2	cyclictest	4042790	-21	kworker/u8:3+flush-259:0	12:30:15	3
3720685	99	30	27,2	cyclictest	4017211	-21	kworker/u8:1+events_unbound	12:05:23	3
3720685	99	30	27,2	cyclictest	3934119	-21	kworker/u8:3+flush-259:0	10:40:24	3
3720685	99	30	25,3	cyclictest	3768057	-21	kworker/u8:0+flush-259:0	08:00:01	3
3720679	99	30	28,2	cyclictest	4001540	-21	kworker/u8:2+flush-259:0	12:05:15	1
3720679	99	30	28,2	cyclictest	3845171	-21	kworker/u8:3+events_unbound	09:30:19	1
3720685	99	29	26,2	cyclictest	4042790	-21	kworker/u8:3+events_unbound	12:25:23	3
3720685	99	29	26,2	cyclictest	4001540	-21	kworker/u8:2+flush-259:0	12:20:24	3
3720685	99	29	23,4	cyclictest	3954836	-21	latency_hist	10:55:01	3
3720679	99	29	27,2	cyclictest	3768057	-21	kworker/u8:0+events_unbound	08:05:17	1
3720679	99	29	26,2	cyclictest	3959821	-21	kworker/u8:0+events_unbound	12:20:19	1
3720679	99	29	26,2	cyclictest	3814279	-21	kworker/u8:2+events_unbound	08:57:34	1
3720676	99	29	25,3	cyclictest	3725798	-21	kworker/u8:2+events_unbound	07:25:24	0
3720685	99	28	25,2	cyclictest	4001540	-21	kworker/u8:2+flush-259:0	12:15:14	3
3720685	99	28	25,2	cyclictest	3980995	-21	kworker/u8:4+flush-259:0	11:45:15	3
3720685	99	28	23,4	cyclictest	3715114	-21	kworker/u8:3+flush-259:0	07:15:16	3
3720679	99	28	25,2	cyclictest	3865826	-21	kworker/u8:2+events_unbound	10:35:23	1
3720679	99	28	25,2	cyclictest	3865826	-21	kworker/u8:2+events_unbound	10:00:14	1
3720679	99	28	25,2	cyclictest	3715114	-21	kworker/u8:3+events_unbound	07:20:13	1
3720676	99	28	23,4	cyclictest	335557	-21	systemd-journal	10:00:35	0
3720685	99	27	24,2	cyclictest	3865826	-21	kworker/u8:2+flush-259:0	10:35:16	3
3720685	99	27	23,3	cyclictest	3793771	-21	kworker/u8:2+events_unbound	08:25:28	3
3720685	99	27	23,3	cyclictest	3725798	-21	kworker/u8:2+events_unbound	07:25:22	3
3720685	99	27	20,3	cyclictest	3855665	-21	kworker/u8:1+events_unbound	09:20:18	3
3720679	99	27	25,2	cyclictest	3959821	-21	kworker/u8:0+flush-259:0	11:10:24	1
3720679	99	27	24,3	cyclictest	3814279	-21	kworker/u8:2+events_unbound	08:54:38	1
3720679	99	27	24,2	cyclictest	3959821	-21	kworker/u8:0+events_unbound	11:15:20	1
3720679	99	27	23,3	cyclictest	3803798	-21	kworker/u8:0+flush-259:0	08:40:35	1
3720676	99	27	24,2	cyclictest	3959821	-21	kworker/u8:0+events_unbound	11:20:12	0
3720676	99	27	24,2	cyclictest	3803798	-21	kworker/u8:0+events_unbound	09:00:23	0
3720676	99	27	23,3	cyclictest	3855665	-21	kworker/u8:1+flush-259:0	09:34:59	0
3720676	99	27	21,4	cyclictest	3891723	-21	ntpq	09:50:22	0
3720676	99	27	21,4	cyclictest	3773436	-21	diskstats	08:00:15	0
3720685	99	26	23,2	cyclictest	3871622	-21	kworker/u8:4+events_unbound	09:40:20	3
3720685	99	26	23,2	cyclictest	3855665	-21	kworker/u8:1+events_unbound	09:35:23	3
3720679	99	26	23,2	cyclictest	4001540	-21	kworker/u8:2+events_unbound	11:55:21	1
3720679	99	26	23,2	cyclictest	3980995	-21	kworker/u8:4+events_unbound	11:34:35	1
3720679	99	26	23,2	cyclictest	3741848	-21	kworker/u8:4+events_unbound	07:50:17	1
3720676	99	26	23,2	cyclictest	4001540	-21	kworker/u8:2+flush-259:0	11:50:14	0
3720685	99	25	22,3	cyclictest	3934119	-21	kworker/u8:3+events_unbound	10:45:27	3
3720685	99	25	22,2	cyclictest	3980995	-21	kworker/u8:4+events_unbound	11:40:36	3
3720685	99	25	22,2	cyclictest	3876849	-21	kworker/u8:3+flush-259:0	09:45:15	3
3720685	99	25	21,3	cyclictest	3705376	-21	kworker/u8:1+events_unbound	07:30:21	3
3720685	99	25	21,3	cyclictest	3705376	-21	kworker/u8:1+events_unbound	07:30:20	3
3720684	99	25	18,4	cyclictest	3959941	-21	latency_hist	11:00:00	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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