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 Sat Aug 01, 2026 12:44:04)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
931399	99	51	40,9	cyclictest	967918	-21	latency_hist	07:45:01	2
931396	99	50	42,5	cyclictest	335557	-21	systemd-journal	09:28:01	1
931402	99	49	45,3	cyclictest	963009	-21	kworker/u8:3+flush-259:0	07:54:59	3
931396	99	44	41,2	cyclictest	1244177	-21	kworker/u8:3+flush-259:0	12:26:04	1
931396	99	44	40,3	cyclictest	1066416	-21	gpgv	09:20:01	1
931396	99	44	38,4	cyclictest	1092567	-21	latency_hist	09:44:59	1
931402	99	43	39,3	cyclictest	1207536	-21	kworker/u8:2+flush-259:0	11:45:01	3
931396	99	43	40,2	cyclictest	1186917	-21	kworker/u8:0+flush-259:0	11:35:02	1
931399	99	42	34,5	cyclictest	1050733	-21	latency_hist	09:05:00	2
931399	99	41	37,3	cyclictest	3060545	-21	kworker/u8:5+flush-259:0	07:50:00	2
931396	99	41	38,2	cyclictest	963009	-21	kworker/u8:3+events_unbound	08:25:01	1
931391	99	41	34,5	cyclictest	335557	-21	systemd-journal	11:05:00	0
931402	99	40	33,5	cyclictest	1045583	-21	latency_hist	09:00:01	3
931399	99	40	32,6	cyclictest	1171187	-21	cat	11:00:01	2
931396	99	40	37,2	cyclictest	1004451	-21	kworker/u8:4+events_unbound	08:25:19	1
931402	99	39	33,4	cyclictest	335557	-21	systemd-journal	09:10:29	3
931391	99	38	34,3	cyclictest	1212945	-21	kworker/u8:1+flush-259:0	12:35:00	0
931396	99	37	32,4	cyclictest	335557	-21	systemd-journal	10:50:00	1
931391	99	37	33,3	cyclictest	1238811	-21	kworker/u8:2+flush-259:0	12:05:00	0
931402	99	36	31,3	cyclictest	1071893	-21	kworker/u8:0+events_unbound	09:47:04	3
931396	99	36	34,2	cyclictest	1228902	-21	kworker/u8:4+events_unbound	12:36:02	1
931396	99	36	30,4	cyclictest	335557	-21	systemd-journal	07:36:02	1
931391	99	36	30,4	cyclictest	942377	-21	/usr/sbin/munin	07:20:13	0
931391	99	36	0,35	cyclictest	1	-21	systemd	09:34:03	0
931399	99	35	29,4	cyclictest	1171190	-21	kworker/u8:2+flush-259:0	11:15:01	2
931399	99	35	28,4	cyclictest	1217894	-21	latency_hist	11:45:01	2
931402	99	34	30,3	cyclictest	1071893	-21	kworker/u8:0+events_unbound	09:40:33	3
931402	99	34	27,5	cyclictest	1192052	-21	latency_hist	11:20:01	3
931396	99	34	32,2	cyclictest	973144	-21	kworker/u8:2+flush-259:0	08:45:23	1
931402	99	33	30,2	cyclictest	1045343	-21	kworker/u8:0+events_unbound	09:00:26	3
931402	99	33	27,4	cyclictest	1207507	-21	latency_hist	11:35:01	3
931396	99	32	28,3	cyclictest	952688	-21	/usr/sbin/munin	07:30:16	1
931391	99	32	26,4	cyclictest	1123613	-21	latency_hist	10:15:01	0
931402	99	31	27,3	cyclictest	1025101	-21	kworker/u8:1+events_unbound	09:05:04	3
931399	99	31	25,4	cyclictest	942239	-21	cat	07:20:00	2
931399	99	31	24,5	cyclictest	1228838	-21	cat	11:55:00	2
931396	99	31	29,2	cyclictest	3060545	-21	kworker/u8:5+events_unbound	07:15:04	1
931402	99	30	27,2	cyclictest	1123628	-21	kworker/u8:4+events_unbound	10:31:03	3
931399	99	30	24,4	cyclictest	1176997	-21	diskstats	11:05:15	2
931396	99	30	27,2	cyclictest	963009	-21	kworker/u8:3+events_unbound	08:02:03	1
931396	99	30	27,2	cyclictest	1207536	-21	kworker/u8:2+events_unbound	11:54:04	1
931396	99	30	27,2	cyclictest	1045343	-21	kworker/u8:0+events_unbound	09:00:16	1
931396	99	30	26,3	cyclictest	335557	-21	systemd-journal	11:15:00	1
931391	99	30	27,2	cyclictest	1149874	-21	kworker/u8:2+events_unbound	10:41:04	0
931391	99	30	21,6	cyclictest	1181720	-21	latency_hist	11:10:01	0
931399	99	29	21,5	cyclictest	509	-21	rs:main		2
931396	99	29	26,3	cyclictest	1228902	-21	kworker/u8:4+events_unbound	12:10:53	1
931396	99	29	25,3	cyclictest	973144	-21	kworker/u8:2+flush-259:0	08:20:00	1
931396	99	29	25,3	cyclictest	3060545	-21	kworker/u8:5+flush-259:0	07:24:59	1
931391	99	29	23,4	cyclictest	1275312	-21	latency_hist	12:40:01	0
931391	99	29	22,5	cyclictest	1066300	-21	latency_hist	09:20:01	0
931402	99	28	22,4	cyclictest	335557	-21	systemd-journal	09:18:01	3
931396	99	28	25,2	cyclictest	1176801	-21	kworker/u8:3+events_unbound	11:05:19	1
931402	99	27	24,3	cyclictest	3060545	-21	kworker/u8:5+events_unbound	07:26:02	3
931402	99	27	24,2	cyclictest	1071893	-21	kworker/u8:0+events_unbound	09:25:32	3
931402	99	27	23,3	cyclictest	3060545	-21	kworker/u8:5+events_unbound	07:24:04	3
931402	99	27	23,3	cyclictest	1097757	-21	kworker/u8:4+flush-259:0	09:55:19	3
931399	99	27	21,4	cyclictest	1009834	-21	diskstats	08:25:15	2
931396	99	27	25,2	cyclictest	973144	-21	kworker/u8:2+flush-259:0	09:10:25	1
931396	99	27	24,2	cyclictest	1160219	-21	kworker/u8:0+events_unbound	10:50:18	1
931396	99	27	23,3	cyclictest	1228286	-21	kworker/u8:0+flush-259:0	12:00:00	1
931391	99	27	22,3	cyclictest	957890	-21	apt-get	07:35:12	0
931391	99	27	21,4	cyclictest	509	-21	rs:main		0
931391	99	27	20,5	cyclictest	1102018	-21	ntpq	09:50:20	0
931402	99	26	23,2	cyclictest	973144	-21	kworker/u8:2+events_unbound	08:29:03	3
931402	99	26	23,2	cyclictest	1004451	-21	kworker/u8:4+flush-259:0	08:30:20	3
931402	99	26	21,4	cyclictest	1082498	-21	apt-get	09:35:12	3
931399	99	26	21,4	cyclictest	994151	-21	apt-get	08:10:13	2
931396	99	26	23,2	cyclictest	952468	-21	kworker/u8:1+flush-259:0	07:55:11	1
931396	99	26	23,2	cyclictest	952468	-21	kworker/u8:1+events_unbound	08:10:18	1
931396	99	26	22,3	cyclictest	1097757	-21	kworker/u8:4+events_unbound	09:56:04	1
931396	99	26	21,3	cyclictest	1025111	-21	/usr/sbin/munin	08:40:15	1
931402	99	25	22,2	cyclictest	1207536	-21	kworker/u8:2+events_unbound	11:50:53	3
931402	99	25	22,2	cyclictest	1019736	-21	kworker/u8:0+flush-259:0	08:35:16	3
931396	99	25	22,2	cyclictest	1123627	-21	kworker/u8:3+events_unbound	10:40:25	1
931402	99	24	21,2	cyclictest	952468	-21	kworker/u8:1+events_unbound	08:05:03	3
931402	99	24	20,3	cyclictest	973144	-21	kworker/u8:2+events_unbound	08:22:03	3
931402	99	24	20,3	cyclictest	1244177	-21	kworker/u8:3+flush-259:0	12:25:57	3
931396	99	24	22,2	cyclictest	1108047	-21	kworker/u8:1+flush-259:0	11:00:24	1
931396	99	24	22,2	cyclictest	1025101	-21	kworker/u8:1+events_unbound	08:51:03	1
931396	99	24	21,2	cyclictest	973144	-21	kworker/u8:2+flush-259:0	08:30:24	1
931396	99	24	21,2	cyclictest	1228286	-21	kworker/u8:0+flush-259:0	12:20:24	1
931396	99	24	21,2	cyclictest	1212945	-21	kworker/u8:1+events_unbound	11:40:22	1
931396	99	24	21,2	cyclictest	1108047	-21	kworker/u8:1+flush-259:0	10:25:25	1
931391	99	24	18,4	cyclictest	1244397	-21	/usr/sbin/munin	12:10:15	0
931402	99	23	20,3	cyclictest	1171190	-21	kworker/u8:2+events_unbound	11:12:04	3
931402	99	23	20,2	cyclictest	1197111	-21	kworker/u8:3+events_unbound	11:35:19	3
931402	99	23	19,3	cyclictest	952468	-21	kworker/u8:1+events_unbound	07:45:18	3
931402	99	23	19,3	cyclictest	1228902	-21	kworker/u8:4+flush-259:0	12:15:16	3
931402	99	23	19,3	cyclictest	1108047	-21	kworker/u8:1+events_unbound	10:23:03	3
931399	99	23	18,3	cyclictest	1102749	-40	mandb	09:53:20	2
931399	99	23	16,5	cyclictest	1175701	-21	ntpq	11:00:21	2
931399	99	23	14,6	cyclictest	1253637	-21	ntpq	12:15:22	2
931396	99	23	21,1	cyclictest	509	-21	rs:main		1
931396	99	23	20,2	cyclictest	973144	-21	kworker/u8:2+events_unbound	10:10:25	1
931396	99	23	20,2	cyclictest	1212945	-21	kworker/u8:1+events_unbound	12:09:03	1
931396	99	23	20,2	cyclictest	1186917	-21	kworker/u8:0+events_unbound	11:20:18	1
931396	99	23	20,2	cyclictest	1123627	-21	kworker/u8:3+events_unbound	10:38:01	1
931391	99	23	19,3	cyclictest	1160328	-21	gpgv	10:50:01	0
931391	99	23	18,4	cyclictest	335557	-21	systemd-journal	10:30:00	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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