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 Fri Aug 14, 2026 00:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
406877	99	49	43,4	cyclictest	703282	-21	cat	23:55:00	2
406882	99	45	41,3	cyclictest	448616	-21	kworker/u8:1+events_unbound	20:05:01	3
406882	99	42	37,3	cyclictest	651375	-21	apt-get	23:05:11	3
406877	99	42	36,5	cyclictest	666651	-21	latency_hist	23:20:01	2
406882	99	40	37,2	cyclictest	510675	-21	kworker/u8:3+flush-259:0	21:10:00	3
406873	99	40	35,4	cyclictest	651116	-21	latency_hist	23:05:02	0
406882	99	39	33,4	cyclictest	335557	-21	systemd-journal	20:46:20	3
406877	99	38	34,3	cyclictest	443731	-21	apt-get	19:45:12	2
406873	99	38	35,2	cyclictest	464155	-21	kworker/u8:0+flush-259:0	21:15:00	0
406873	99	38	32,4	cyclictest	542088	-21	latency_hist	21:20:01	0
406882	99	37	29,6	cyclictest	335557	-21	systemd-journal	22:55:00	3
406876	99	36	33,2	cyclictest	718743	-21	kworker/u8:1+events_unbound	00:10:24	1
406876	99	36	33,2	cyclictest	718743	-21	kworker/u8:1+events_unbound	00:10:23	1
406876	99	36	31,3	cyclictest	412258	-21	kworker/u8:4+events_unbound	19:25:14	1
406876	99	36	29,5	cyclictest	557699	-21	latency_hist	21:35:00	1
406882	99	35	31,3	cyclictest	718743	-21	kworker/u8:1+flush-259:0	00:40:01	3
406882	99	35	28,5	cyclictest	335557	-21	systemd-journal	20:40:00	3
406876	99	35	31,3	cyclictest	412258	-21	kworker/u8:4+flush-259:0	20:35:24	1
406876	99	34	30,3	cyclictest	547295	-21	kworker/u8:3+events_unbound	21:35:17	1
406877	99	33	30,2	cyclictest	656949	-21	kworker/u8:1+events_unbound	23:25:00	2
406873	99	33	29,3	cyclictest	542117	-21	kworker/u8:2+flush-259:0	21:20:15	0
406873	99	33	27,4	cyclictest	335557	-21	systemd-journal	19:36:14	0
406873	99	33	27,4	cyclictest	335557	-21	systemd-journal	19:36:14	0
406882	99	32	25,5	cyclictest	335557	-21	systemd-journal	21:50:00	3
406877	99	32	29,2	cyclictest	516090	-21	kworker/u8:5+events_unbound	20:55:21	2
406877	99	32	28,3	cyclictest	625065	-21	kworker/u8:2+flush-259:0	22:50:27	2
406877	99	32	28,3	cyclictest	552705	-21	kworker/u8:0+flush-259:0	22:15:24	2
406876	99	32	29,2	cyclictest	562873	-21	kworker/u8:2+flush-259:0	22:11:57	1
406873	99	32	28,3	cyclictest	464155	-21	kworker/u8:0+flush-259:0	20:09:59	0
406873	99	32	26,5	cyclictest	594313	-21	latency_hist	22:10:01	0
406873	99	32	26,4	cyclictest	416322	-21	ntpq	19:15:23	0
406877	99	31	29,1	cyclictest	562873	-21	kworker/u8:2+events_unbound	22:05:28	2
406877	99	31	27,3	cyclictest	412044	-21	kworker/u8:2+events_unbound	19:35:00	2
406876	99	31	29,2	cyclictest	412258	-21	kworker/u8:4+events_unbound	20:15:28	1
406876	99	31	28,2	cyclictest	562873	-21	kworker/u8:2+flush-259:0	22:05:20	1
406876	99	31	28,2	cyclictest	464155	-21	kworker/u8:0+events_unbound	20:50:20	1
406876	99	31	27,3	cyclictest	671845	-21	kworker/u8:3+flush-259:0	23:40:20	1
406873	99	31	26,4	cyclictest	505888	-21	diskstats	20:45:15	0
406873	99	31	26,4	cyclictest	335557	-21	systemd-journal	22:44:26	0
406873	99	31	25,4	cyclictest	478792	-21	ntpq	20:15:23	0
406877	99	30	25,3	cyclictest	625507	-21	/usr/sbin/munin	22:40:14	2
406876	99	30	27,2	cyclictest	412258	-21	kworker/u8:4+flush-259:0	19:20:15	1
406876	99	30	26,3	cyclictest	412258	-21	kworker/u8:4+flush-259:0	20:15:00	1
406882	99	29	25,3	cyclictest	542117	-21	kworker/u8:2+flush-259:0	21:20:26	3
406882	99	29	24,3	cyclictest	656949	-21	kworker/u8:1+events_unbound	23:15:01	3
406877	99	29	24,4	cyclictest	464155	-21	kworker/u8:0+events_unbound	21:09:22	2
406876	99	29	26,3	cyclictest	640618	-21	kworker/u8:0+events_unbound	23:07:06	1
406876	99	29	26,2	cyclictest	412258	-21	kworker/u8:4+flush-259:0	20:40:21	1
406877	99	28	25,2	cyclictest	412258	-21	kworker/u8:4+flush-259:0	20:05:21	2
406877	99	28	25,2	cyclictest	412044	-21	kworker/u8:2+flush-259:0	19:55:11	2
406877	99	28	24,3	cyclictest	625065	-21	kworker/u8:2+events_unbound	23:03:27	2
406877	99	28	23,3	cyclictest	335557	-21	systemd-journal	20:21:20	2
406876	99	28	25,2	cyclictest	562873	-21	kworker/u8:2+flush-259:0	22:25:19	1
406873	99	28	24,3	cyclictest	625065	-21	kworker/u8:2+flush-259:0	22:50:16	0
406882	99	27	22,3	cyclictest	500546	-21	apt-get	20:40:12	3
406877	99	27	23,3	cyclictest	739260	-21	kworker/u8:0+events_unbound	00:37:57	2
406877	99	27	23,3	cyclictest	708221	-21	kworker/u8:0+flush-259:0	00:05:20	2
406877	99	27	23,3	cyclictest	702525	-21	kworker/u8:1+events_unbound	23:52:26	2
406876	99	27	24,2	cyclictest	671845	-21	kworker/u8:3+events_unbound	23:30:25	1
406876	99	27	24,2	cyclictest	412258	-21	kworker/u8:4+events_unbound	19:16:58	1
406876	99	27	23,3	cyclictest	542117	-21	kworker/u8:2+events_unbound	21:24:26	1
406876	99	27	22,4	cyclictest	583992	-21	latency_hist	22:00:01	1
406873	99	27	23,3	cyclictest	516090	-21	kworker/u8:5+flush-259:0	21:00:01	0
406873	99	27	23,2	cyclictest	495370	-21	apt-get	20:35:12	0
406882	99	26	22,3	cyclictest	671845	-21	kworker/u8:3+flush-259:0	23:35:24	3
406877	99	26	23,2	cyclictest	552705	-21	kworker/u8:0+flush-259:0	22:35:21	2
406876	99	26	22,4	cyclictest	671845	-21	kworker/u8:3+events_unbound	23:52:47	1
406876	99	26	21,4	cyclictest	573898	-21	apt-get	21:50:14	1
406876	99	26	21,4	cyclictest	573898	-21	apt-get	21:50:14	1
406873	99	26	23,2	cyclictest	656949	-21	kworker/u8:1+events_unbound	23:15:16	0
406873	99	26	22,3	cyclictest	464155	-21	kworker/u8:0+events_unbound	20:30:21	0
406873	99	26	22,3	cyclictest	412258	-21	kworker/u8:4+events_unbound	20:13:21	0
406873	99	26	19,5	cyclictest	682110	-21	latency_hist	23:35:01	0
406882	99	25	23,1	cyclictest	625065	-21	kworker/u8:2+events_unbound	22:45:15	3
406882	99	25	21,3	cyclictest	729090	-21	kworker/u8:2+flush-259:0	00:30:01	3
406882	99	25	21,3	cyclictest	640618	-21	kworker/u8:0+flush-259:0	23:30:25	3
406877	99	25	23,2	cyclictest	531807	-21	kworker/u8:1+flush-259:0	21:25:30	2
406877	99	25	22,2	cyclictest	412258	-21	kworker/u8:4+events_unbound	19:25:22	2
406877	99	25	21,3	cyclictest	412258	-21	kworker/u8:4+events_unbound	20:26:21	2
406876	99	25	22,2	cyclictest	656949	-21	kworker/u8:1+events_unbound	23:16:26	1
406876	99	25	22,2	cyclictest	625065	-21	kworker/u8:2+events_unbound	22:50:20	1
406873	99	25	22,2	cyclictest	547295	-21	kworker/u8:3+events_unbound	21:37:26	0
406873	99	25	21,3	cyclictest	614783	-21	kworker/u8:1+flush-259:0	22:45:20	0
406882	99	24	19,3	cyclictest	703428	-21	/usr/sbin/munin	23:55:17	3
406877	99	24	21,2	cyclictest	671845	-21	kworker/u8:3+flush-259:0	23:40:20	2
406877	99	24	21,2	cyclictest	640618	-21	kworker/u8:0+events_unbound	23:38:26	2
406877	99	24	21,2	cyclictest	412044	-21	kworker/u8:2+events_unbound	19:35:29	2
406877	99	24	21,2	cyclictest	412044	-21	kworker/u8:2+events_unbound	19:35:28	2
406877	99	24	20,3	cyclictest	396200	-21	kworker/u8:1+events_unbound	19:20:13	2
406876	99	24	22,2	cyclictest	718743	-21	kworker/u8:1+events_unbound	00:28:28	1
406876	99	24	21,3	cyclictest	412044	-21	kworker/u8:2+events_unbound	19:40:27	1
406876	99	24	21,2	cyclictest	531807	-21	kworker/u8:1+flush-259:0	21:25:25	1
406876	99	24	21,2	cyclictest	412258	-21	kworker/u8:4+flush-259:0	21:10:29	1
406876	99	24	21,2	cyclictest	412258	-21	kworker/u8:4+flush-259:0	20:00:25	1
406876	99	24	19,4	cyclictest	718734	-21	latency_hist	00:10:00	1
406876	99	24	19,4	cyclictest	645087	-21	ntpq	22:55:21	1
406873	99	24	21,2	cyclictest	640618	-21	kworker/u8:0+flush-259:0	23:25:11	0
406873	99	24	20,3	cyclictest	656949	-21	kworker/u8:1+events_unbound	23:22:08	0
406873	99	24	17,5	cyclictest	526597	-21	latency_hist	21:05:00	0
406882	99	23	20,2	cyclictest	464155	-21	kworker/u8:0+flush-259:0	21:15:25	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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