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 Jul 26, 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
2663875	99	54	51,2	cyclictest	2673876	-21	kworker/u8:3+flush-259:0	08:10:01	2
2663872	99	48	45,2	cyclictest	2845609	-21	kworker/u8:0+events_unbound	10:11:21	1
2663872	99	45	41,3	cyclictest	2845583	-21	latency_hist	10:05:01	1
2663872	99	44	40,3	cyclictest	2960782	-21	kworker/u8:3+events_unbound	12:23:20	1
2663880	99	42	35,5	cyclictest	3001921	-21	latency_hist	12:35:01	3
2663872	99	38	35,2	cyclictest	2772965	-21	kworker/u8:3+flush-259:0	09:15:00	1
2663875	99	37	34,2	cyclictest	2819791	-21	kworker/u8:2+flush-259:0	09:55:00	2
2663880	99	36	31,3	cyclictest	2866498	-21	/usr/sbin/munin	10:25:19	3
2663880	99	36	29,4	cyclictest	335557	-21	systemd-journal	10:00:28	3
2663875	99	34	27,5	cyclictest	335557	-21	systemd-journal	11:01:29	2
2663872	99	34	31,2	cyclictest	2809420	-21	kworker/u8:1+flush-259:0	10:50:21	1
2663872	99	34	31,2	cyclictest	2788714	-21	kworker/u8:0+events_unbound	09:40:22	1
2663872	99	34	31,2	cyclictest	2772965	-21	kworker/u8:3+events_unbound	09:05:14	1
2663872	99	34	31,2	cyclictest	2604994	-21	kworker/u8:1+flush-259:0	07:10:01	1
2663872	99	34	29,4	cyclictest	2720875	-21	apt-get	08:05:13	1
2663870	99	34	27,5	cyclictest	2730023	-21	ntpq	08:10:21	0
2663880	99	33	29,3	cyclictest	2934098	-21	kworker/u8:0+flush-259:0	11:35:01	3
2663880	99	33	29,3	cyclictest	2715664	-21	kworker/u8:0+flush-259:0	08:00:21	3
2663872	99	33	30,2	cyclictest	2819791	-21	kworker/u8:2+events_unbound	10:10:00	1
2663870	99	33	27,4	cyclictest	2913496	-21	apt-get	11:10:15	0
2663872	99	32	29,2	cyclictest	2913033	-21	store	11:10:00	1
2663872	99	32	29,2	cyclictest	2788714	-21	kworker/u8:0+events_unbound	09:20:17	1
2663872	99	32	29,2	cyclictest	2658702	-21	kworker/u8:2+flush-259:0	07:45:21	1
2663872	99	32	22,3	cyclictest	2991034	-21	kworker/u8:0+events_unbound	12:25:23	1
2663870	99	32	28,3	cyclictest	2809420	-21	kworker/u8:1+flush-259:0	09:45:26	0
2663870	99	32	27,3	cyclictest	2887171	-21	apt-get	10:45:10	0
2663872	99	31	28,2	cyclictest	2730961	-21	kworker/u8:4+events_unbound	09:28:59	1
2663872	99	31	26,4	cyclictest	2897519	-21	apt-get	10:55:13	1
2663872	99	31	26,4	cyclictest	2741957	-21	/usr/sbin/munin	08:25:15	1
2663872	99	31	24,2	cyclictest	2604994	-21	kworker/u8:1+events_unbound	07:10:23	1
2663870	99	31	27,3	cyclictest	2673876	-21	kworker/u8:3+events_unbound	07:33:30	0
2663880	99	30	26,3	cyclictest	2866244	-21	kworker/u8:0+flush-259:0	10:30:24	3
2663880	99	30	25,4	cyclictest	2673876	-21	kworker/u8:3+flush-259:0	07:20:17	3
2663880	99	30	25,4	cyclictest	2673876	-21	kworker/u8:3+flush-259:0	07:20:16	3
2663880	99	30	23,5	cyclictest	2959938	-21	cat	11:55:00	3
2663872	99	30	27,2	cyclictest	2788714	-21	kworker/u8:0+flush-259:0	09:35:24	1
2663872	99	30	26,3	cyclictest	2809420	-21	kworker/u8:1+flush-259:0	10:40:21	1
2663870	99	30	26,3	cyclictest	2819791	-21	kworker/u8:2+events_unbound	09:55:23	0
2663870	99	30	26,3	cyclictest	2809420	-21	kworker/u8:1+events_unbound	10:00:23	0
2663870	99	30	24,4	cyclictest	2820177	-21	diskstats	09:40:15	0
2663875	99	29	24,4	cyclictest	2673876	-21	kworker/u8:3+flush-259:0	07:45:00	2
2663872	99	29	26,2	cyclictest	2934098	-21	kworker/u8:0+flush-259:0	11:45:20	1
2663872	99	29	26,2	cyclictest	2730961	-21	kworker/u8:4+events_unbound	08:50:21	1
2663872	99	29	26,2	cyclictest	2730961	-21	kworker/u8:4+events_unbound	08:30:17	1
2663872	99	29	26,2	cyclictest	2699974	-21	kworker/u8:1+flush-259:0	08:00:25	1
2663872	99	29	22,2	cyclictest	2699974	-21	kworker/u8:1+events_unbound	08:15:24	1
2663870	99	29	26,2	cyclictest	2730961	-21	kworker/u8:4+flush-259:0	08:40:21	0
2663870	99	29	25,3	cyclictest	2881803	-21	kworker/u8:2+events_unbound	11:05:14	0
2663870	99	29	24,4	cyclictest	335557	-21	systemd-journal	07:17:28	0
2663875	99	28	21,4	cyclictest	2980883	-21	latency_hist	12:15:00	2
2663872	99	28	25,2	cyclictest	2996743	-21	kworker/u8:2+events_unbound	12:30:23	1
2663872	99	28	25,2	cyclictest	2944227	-21	kworker/u8:4+events_unbound	11:59:29	1
2663872	99	28	25,2	cyclictest	2944227	-21	kworker/u8:4+events_unbound	11:59:28	1
2663870	99	28	24,3	cyclictest	2970216	-21	kworker/u8:0+events_unbound	12:04:30	0
2663870	99	28	24,3	cyclictest	2970216	-21	kworker/u8:0+events_unbound	12:04:29	0
2663870	99	28	24,3	cyclictest	2881803	-21	kworker/u8:2+events_unbound	11:18:29	0
2663870	99	28	22,4	cyclictest	2929161	-21	diskstats	11:25:14	0
2663880	99	27	23,3	cyclictest	2730961	-21	kworker/u8:4+flush-259:0	08:25:22	3
2663875	99	27	19,5	cyclictest	2850738	-21	latency_hist	10:10:02	2
2663872	99	27	24,2	cyclictest	2918426	-21	kworker/u8:3+flush-259:0	11:25:16	1
2663872	99	27	24,2	cyclictest	2819791	-21	kworker/u8:2+events_unbound	09:55:17	1
2663872	99	27	24,2	cyclictest	2725786	-21	kworker/u8:2+events_unbound	08:20:22	1
2663872	99	27	23,3	cyclictest	2830343	-21	/usr/sbin/munin	09:50:15	1
2663872	99	27	23,3	cyclictest	2809420	-21	kworker/u8:1+flush-259:0	10:50:00	1
2663872	99	27	21,2	cyclictest	2944227	-21	kworker/u8:4+events_unbound	12:10:14	1
2663870	99	27	23,3	cyclictest	2730961	-21	kworker/u8:4+events_unbound	09:21:29	0
2663870	99	27	23,2	cyclictest	2715698	-21	apt-get	08:00:12	0
2663880	99	26	21,3	cyclictest	2809420	-21	kworker/u8:1+events_unbound	09:45:00	3
2663875	99	26	22,3	cyclictest	2658702	-21	kworker/u8:2+flush-259:0	07:55:00	2
2663875	99	26	20,3	cyclictest	2866254	-21	latency_hist	10:25:01	2
2663872	99	26	23,2	cyclictest	2934098	-21	kworker/u8:0+events_unbound	11:30:18	1
2663872	99	26	22,3	cyclictest	2809420	-21	kworker/u8:1+events_unbound	09:45:27	1
2663872	99	26	18,6	cyclictest	335557	-21	systemd-journal	08:45:01	1
2663870	99	26	23,2	cyclictest	2934098	-21	kworker/u8:0+flush-259:0	11:50:26	0
2663870	99	26	23,2	cyclictest	2918426	-21	kworker/u8:3+events_unbound	11:20:22	0
2663870	99	26	22,3	cyclictest	3774224	-21	kworker/u8:0+events_unbound	07:13:31	0
2663870	99	26	22,3	cyclictest	335557	-21	systemd-journal	10:36:28	0
2663880	99	25	18,5	cyclictest	335557	-21	systemd-journal	12:20:01	3
2663875	99	25	18,5	cyclictest	2944227	-21	kworker/u8:4+flush-259:0	12:30:16	2
2663875	99	25	17,5	cyclictest	2783744	-21	cp	09:05:01	2
2663872	99	25	22,2	cyclictest	2944227	-21	kworker/u8:4+events_unbound	12:05:23	1
2663872	99	25	22,2	cyclictest	2918426	-21	kworker/u8:3+events_unbound	11:35:23	1
2663872	99	25	22,2	cyclictest	2730961	-21	kworker/u8:4+events_unbound	09:15:16	1
2663872	99	25	18,3	cyclictest	2673876	-21	kworker/u8:3+events_unbound	07:20:22	1
2663872	99	25	18,3	cyclictest	2673876	-21	kworker/u8:3+events_unbound	07:20:22	1
2663870	99	25	23,2	cyclictest	2944225	-21	kworker/u8:1+events_unbound	11:44:29	0
2663870	99	25	22,2	cyclictest	2881803	-21	kworker/u8:2+events_unbound	11:00:24	0
2663870	99	25	22,2	cyclictest	2809420	-21	kworker/u8:1+flush-259:0	10:50:25	0
2663870	99	25	22,2	cyclictest	2788714	-21	kworker/u8:0+events_unbound	09:10:28	0
2663870	99	25	21,3	cyclictest	2944227	-21	kworker/u8:4+events_unbound	12:08:28	0
2663870	99	25	20,3	cyclictest	335557	-21	systemd-journal	10:20:28	0
2663880	99	24	20,3	cyclictest	2918426	-21	kworker/u8:3+flush-259:0	11:40:00	3
2663875	99	24	21,2	cyclictest	2949642	-21	apt-get	11:45:11	2
2663875	99	24	19,3	cyclictest	335557	-21	systemd-journal	09:28:28	2
2663875	99	24	18,4	cyclictest	335557	-21	systemd-journal	07:25:28	2
2663872	99	24	22,2	cyclictest	2881803	-21	kworker/u8:2+events_unbound	11:43:30	1
2663872	99	24	21,2	cyclictest	2918426	-21	kworker/u8:3+flush-259:0	11:20:24	1
2663872	99	24	21,2	cyclictest	2866244	-21	kworker/u8:0+events_unbound	10:35:24	1
2663872	99	24	21,2	cyclictest	2752111	-21	kworker/u8:2+events_unbound	09:00:19	1
2663872	99	24	20,3	cyclictest	3774224	-21	kworker/u8:0+flush-259:0	07:15:24	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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