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 Mon Apr 27, 2026 12:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
4010690	99	48	42,5	cyclictest	252	-21	systemd-journal	10:25:00	0
4010690	99	43	37,4	cyclictest	117094	-21	cp	12:00:00	0
4010690	99	43	36,5	cyclictest	4073582	-21	latency_hist	08:10:01	0
4010698	99	42	36,4	cyclictest	80806	-21	latency_hist	11:25:01	2
4010700	99	39	34,3	cyclictest	4026433	-21	cp	07:25:00	3
4010690	99	38	33,4	cyclictest	1949870	-21	kworker/u8:0+flush-259:0	07:15:21	0
4010694	99	37	32,4	cyclictest	44924	-21	kworker/u8:3+flush-259:0	11:10:00	1
4010690	99	37	32,3	cyclictest	1949870	-21	kworker/u8:0+flush-259:0	07:40:24	0
4010690	99	37	30,5	cyclictest	4165242	-21	ntpq	09:35:23	0
4010690	99	36	32,3	cyclictest	8654	-21	kworker/u8:0+events_unbound	11:55:00	0
4010700	99	34	22,4	cyclictest	101686	-21	apt-get	11:45:12	3
4010694	99	34	27,4	cyclictest	252	-21	systemd-journal	08:10:42	1
4010690	99	34	28,5	cyclictest	153908	-21	cat	12:35:01	0
4010690	99	34	27,5	cyclictest	105666	-21	ntpq	11:45:21	0
4010690	99	33	29,3	cyclictest	4160957	-21	kworker/u8:0+flush-259:0	09:45:00	0
4010700	99	32	27,4	cyclictest	116927	-21	http	12:00:00	3
4010698	99	32	28,3	cyclictest	4042583	-21	apt-get	07:40:11	2
4010698	99	32	26,4	cyclictest	252	-21	systemd-journal	11:35:00	2
4010690	99	32	27,4	cyclictest	39978	-21	diskstats	10:45:13	0
4010694	99	31	27,3	cyclictest	111952	-21	kworker/u8:4+flush-259:0	11:55:25	1
4010690	99	31	25,5	cyclictest	4150947	-21	apt-get	09:25:11	0
4010690	99	31	24,5	cyclictest	4109548	-21	latency_hist	08:45:02	0
4010690	99	31	23,5	cyclictest	4130529	-21	diskstats	09:05:14	0
4010698	99	30	26,3	cyclictest	127882	-21	kworker/u8:0+flush-259:0	12:20:16	2
4010694	99	30	25,3	cyclictest	4119868	-21	kworker/u8:2+flush-259:0	09:30:20	1
4010690	99	30	26,3	cyclictest	55304	-21	apt-get	11:00:11	0
4010690	99	30	26,3	cyclictest	4083862	-21	kworker/u8:3+flush-259:0	08:45:17	0
4010690	99	30	26,3	cyclictest	4021103	-21	kworker/u8:1+events_unbound	08:00:21	0
4010690	99	30	23,5	cyclictest	4160073	-21	ntpq	09:30:21	0
4010690	99	30	1,27	cyclictest	4036776	-21	true	07:35:00	0
4010698	99	29	25,3	cyclictest	4021103	-21	kworker/u8:1+flush-259:0	07:20:13	2
4010694	99	29	25,3	cyclictest	148519	-21	apt-get	12:30:11	1
4010690	99	29	25,3	cyclictest	4021103	-21	kworker/u8:1+flush-259:0	09:10:22	0
4010690	99	29	25,3	cyclictest	1949870	-21	kworker/u8:0+flush-259:0	07:35:17	0
4010690	99	29	22,5	cyclictest	252	-21	systemd-journal	09:15:18	0
4010698	99	28	23,4	cyclictest	34207	-21	apt-get	10:38:19	2
4010698	99	28	23,4	cyclictest	122488	-21	latency_hist	12:05:00	2
4010698	99	28	23,3	cyclictest	4130100	-21	latency_hist	09:05:02	2
4010694	99	28	24,3	cyclictest	4021103	-21	kworker/u8:1+flush-259:0	07:25:17	1
4010690	99	28	24,3	cyclictest	4109574	-21	kworker/u8:0+events_unbound	08:50:02	0
4010690	99	28	24,3	cyclictest	1949870	-21	kworker/u8:0+flush-259:0	07:10:24	0
4010690	99	28	23,3	cyclictest	4119868	-21	kworker/u8:2+flush-259:0	10:15:01	0
4010698	99	27	22,4	cyclictest	4057743	-21	apt-get	07:55:01	2
4010694	99	27	23,3	cyclictest	8654	-21	kworker/u8:0+flush-259:0	11:30:26	1
4010694	99	27	23,3	cyclictest	4021103	-21	kworker/u8:1+flush-259:0	07:50:25	1
4010694	99	27	23,2	cyclictest	4119868	-21	kworker/u8:2+flush-259:0	09:45:25	1
4010694	99	27	22,4	cyclictest	4160957	-21	kworker/u8:0+events_unbound	09:55:15	1
4010694	99	27	22,4	cyclictest	143355	-21	apt-get	12:25:09	1
4010694	99	27	22,3	cyclictest	8654	-21	kworker/u8:0+events_unbound	11:10:33	1
4010690	99	27	18,6	cyclictest	38640	-21	ntpq	10:40:23	0
4010700	99	26	22,3	cyclictest	4119868	-21	kworker/u8:2+flush-259:0	10:00:16	3
4010700	99	26	22,3	cyclictest	4119868	-21	kworker/u8:2+flush-259:0	10:00:16	3
4010694	99	26	23,2	cyclictest	4119868	-21	kworker/u8:2+flush-259:0	09:24:59	1
4010694	99	26	22,3	cyclictest	4119868	-21	kworker/u8:2+events_unbound	09:40:23	1
4010694	99	26	20,4	cyclictest	4042556	-21	/usr/sbin/munin	07:40:22	1
4010694	99	26	20,4	cyclictest	13770	-21	latency_hist	10:20:01	1
4010690	99	26	22,3	cyclictest	4021103	-21	kworker/u8:1+flush-259:0	07:30:00	0
4010700	99	25	19,4	cyclictest	106822	-21	/usr/sbin/munin	11:50:19	3
4010694	99	25	22,2	cyclictest	4021103	-21	kworker/u8:1+flush-259:0	09:19:59	1
4010694	99	25	20,4	cyclictest	8654	-21	kworker/u8:0+flush-259:0	11:45:16	1
4010694	99	25	20,4	cyclictest	4119868	-21	kworker/u8:2+events_unbound	11:00:25	1
4010690	99	25	21,3	cyclictest	70709	-21	kworker/u8:1+flush-259:0	11:25:24	0
4010690	99	25	21,3	cyclictest	1949870	-21	kworker/u8:0+flush-259:0	08:10:20	0
4010690	99	25	20,3	cyclictest	4181528	-21	kworker/u8:1+events_unbound	10:05:19	0
4010690	99	25	19,4	cyclictest	4176611	-21	/usr/sbin/munin	09:50:15	0
4010700	99	24	19,4	cyclictest	4078988	-21	apt-get	08:15:12	3
4010700	99	24	18,4	cyclictest	252	-21	systemd-journal	10:40:01	3
4010694	99	24	20,3	cyclictest	127882	-21	kworker/u8:0+events_unbound	12:25:01	1
4010690	99	24	21,2	cyclictest	4119868	-21	kworker/u8:2+events_unbound	10:00:22	0
4010690	99	24	21,2	cyclictest	4119868	-21	kworker/u8:2+events_unbound	10:00:22	0
4010690	99	24	20,3	cyclictest	85963	-21	kworker/u8:3+flush-259:0	11:40:20	0
4010690	99	24	20,3	cyclictest	4109574	-21	kworker/u8:0+events_unbound	09:00:01	0
4010690	99	24	20,3	cyclictest	4021103	-21	kworker/u8:1+events_unbound	08:15:19	0
4010690	99	24	20,3	cyclictest	1949870	-21	kworker/u8:0+events_unbound	07:55:20	0
4010690	99	24	20,3	cyclictest	111952	-21	kworker/u8:4+flush-259:0	12:05:19	0
4010698	99	23	19,3	cyclictest	127882	-21	kworker/u8:0+flush-259:0	12:25:15	2
4010698	99	23	17,4	cyclictest	252	-21	systemd-journal	11:31:13	2
4010694	99	23	19,3	cyclictest	4021103	-21	kworker/u8:1+flush-259:0	09:00:20	1
4010694	99	23	19,3	cyclictest	4021103	-21	kworker/u8:1+events_unbound	08:50:24	1
4010694	99	23	18,3	cyclictest	85963	-21	kworker/u8:3+flush-259:0	12:04:59	1
4010694	99	23	18,3	cyclictest	70709	-21	kworker/u8:1+flush-259:0	11:15:21	1
4010690	99	23	19,3	cyclictest	44924	-21	kworker/u8:3+events_unbound	11:05:21	0
4010700	99	22	17,3	cyclictest	4149714	-21	needreboot	09:20:19	3
4010698	99	22	19,2	cyclictest	4083862	-21	kworker/u8:3+events_unbound	08:35:01	2
4010698	99	22	18,3	cyclictest	4119868	-21	kworker/u8:2+flush-259:0	11:20:01	2
4010698	99	22	18,3	cyclictest	1949870	-21	kworker/u8:0+flush-259:0	07:30:13	2
4010694	99	22	18,3	cyclictest	70709	-21	kworker/u8:1+flush-259:0	11:55:00	1
4010694	99	22	18,3	cyclictest	1949870	-21	kworker/u8:0+flush-259:0	07:10:12	1
4010694	99	22	17,4	cyclictest	127882	-21	kworker/u8:0+flush-259:0	12:35:21	1
4010690	99	22	19,2	cyclictest	8654	-21	kworker/u8:0+flush-259:0	10:35:16	0
4010690	99	22	19,2	cyclictest	70709	-21	kworker/u8:1+events_unbound	11:15:23	0
4010690	99	22	19,2	cyclictest	4083862	-21	kworker/u8:3+flush-259:0	08:25:22	0
4010690	99	22	18,3	cyclictest	4119868	-21	kworker/u8:2+events_unbound	10:30:21	0
4010690	99	22	18,3	cyclictest	4119868	-21	kworker/u8:2+events_unbound	09:20:19	0
4010690	99	22	17,4	cyclictest	1949870	-21	kworker/u8:0+events_unbound	07:10:00	0
4010700	99	21	17,3	cyclictest	4160957	-21	kworker/u8:0+flush-259:0	09:50:16	3
4010700	99	21	17,3	cyclictest	4114955	-21	apt-get	08:50:14	3
4010700	99	21	17,3	cyclictest	127882	-21	kworker/u8:0+flush-259:0	12:30:20	3
4010700	99	21	15,4	cyclictest	121623	-21	ntpq	12:00:22	3
4010700	99	21	14,5	cyclictest	69567	-21	ntpq	11:10:19	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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