OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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, lowest P state: ondemand
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack5slot4s.osadl.org (updated Sat Sep 19, 2026 12:44:14)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2129779	2	188	0,2	sleep3	48	1	ktimers/3	12:24:08	3
1892603	2	96	0,3	chrt	75	-21	kworker/3:1-events	08:24:17	3
1816507	99	63	52,9	cyclictest	278	-21	systemd-journal	12:35:00	1
1816499	99	63	54,6	cyclictest	1987078	-21	latency_hist	10:00:01	0
1816507	99	58	47,8	cyclictest	278	-21	systemd-journal	08:50:00	1
1816507	99	58	47,8	cyclictest	1962088	-21	latency_hist	09:35:02	1
1816509	99	57	44,10	cyclictest	2115554	-21	ntpq	12:09:12	2
1816507	99	56	49,5	cyclictest	1843119	-21	kworker/u8:3+flush-8:0	07:44:15	1
1816509	99	52	41,9	cyclictest	1848562	-21	cat	07:40:01	2
1816499	99	52	43,7	cyclictest	2121125	-21	latency_hist	12:15:01	0
2077332	2	51	0,3	sleep1	0	-21	swapper/1	11:34:02	1
1816507	99	51	42,6	cyclictest	2021951	-21	kworker/u8:2+events_unbound	10:44:12	1
1816499	99	49	41,6	cyclictest	1937575	-21	kworker/u8:2+flush-8:0	09:54:10	0
1816499	99	49	36,9	cyclictest	278	-21	systemd-journal	11:02:08	0
1816499	99	49	36,10	cyclictest	278	-21	systemd-journal	11:44:08	0
1816507	99	45	38,5	cyclictest	998204	-21	kworker/u8:1+flush-8:0	07:54:17	1
1816499	99	45	34,8	cyclictest	278	-21	systemd-journal	12:01:08	0
1816499	99	45	34,8	cyclictest	278	-21	systemd-journal	09:44:06	0
1816507	99	44	36,6	cyclictest	1996913	-21	kworker/u8:1+flush-8:0	11:49:06	1
1816507	99	43	38,4	cyclictest	1900811	-21	kworker/u8:3+flush-8:0	08:39:02	1
1816507	99	43	37,4	cyclictest	1900811	-21	kworker/u8:3+events_unbound	08:34:08	1
1816507	99	43	35,5	cyclictest	2021951	-21	kworker/u8:2+events_unbound	10:39:11	1
1816507	99	42	33,6	cyclictest	1996913	-21	kworker/u8:1+flush-8:0	11:54:12	1
1816507	99	42	33,6	cyclictest	1996913	-21	kworker/u8:1+flush-8:0	11:54:12	1
1816507	99	42	31,8	cyclictest	278	-21	systemd-journal	09:30:00	1
1816507	99	41	32,7	cyclictest	1862603	-21	kworker/u8:2+flush-8:0	08:04:12	1
1816499	99	41	36,3	cyclictest	998204	-21	kworker/u8:1+events_unbound	07:59:09	0
1816499	99	41	33,6	cyclictest	1947273	-21	latency_hist	09:20:01	0
1816205	2	41	4,9	sleep2	0	-21	swapper/2	07:09:18	2
1816499	99	40	31,7	cyclictest	278	-21	systemd-journal	10:45:01	0
1816499	99	40	31,7	cyclictest	1957137	-21	latency_hist	09:30:01	0
1816509	99	39	18,8	cyclictest	1833205	-21	cron	07:25:00	2
1816499	99	39	31,6	cyclictest	2071051	-21	ntpq	11:24:13	0
1816499	99	38	7,24	cyclictest	2001959	-21	kworker/0:2+events	10:49:01	0
1816499	99	38	28,7	cyclictest	2046669	-21	latency_hist	11:00:01	0
1816507	99	37	32,4	cyclictest	1937575	-21	kworker/u8:2+flush-8:0	09:54:12	1
1816507	99	37	31,4	cyclictest	998204	-21	kworker/u8:1+flush-8:0	07:59:04	1
1816507	99	36	31,4	cyclictest	1862603	-21	kworker/u8:2+flush-8:0	08:19:16	1
1816507	99	36	29,5	cyclictest	1987012	-21	kworker/u8:0+flush-8:0	11:14:06	1
1816507	99	35	28,5	cyclictest	2046037	-21	ntpq	10:59:12	1
1816507	99	35	28,5	cyclictest	1796548	-21	kworker/u8:0+events_unbound	08:09:10	1
1816507	99	35	27,6	cyclictest	1900811	-21	kworker/u8:3+flush-8:0	09:09:15	1
1816507	99	35	27,5	cyclictest	278	-21	systemd-journal	07:24:07	1
1816507	99	35	23,8	cyclictest	1996913	-21	kworker/u8:1+flush-8:0	10:14:15	1
1816507	99	35	23,8	cyclictest	1996913	-21	kworker/u8:1+flush-8:0	10:14:15	1
1816499	99	35	27,6	cyclictest	278	-21	systemd-journal	10:14:08	0
1816499	99	35	27,6	cyclictest	278	-21	systemd-journal	10:14:08	0
1811735	2	35	4,9	sleep1	0	-21	swapper/1	07:05:47	1
1816507	99	34	27,5	cyclictest	998204	-21	kworker/u8:1+flush-8:0	07:34:16	1
1816507	99	34	27,5	cyclictest	1996913	-21	kworker/u8:1+events_unbound	11:44:03	1
1816507	99	34	27,5	cyclictest	1987012	-21	kworker/u8:0+events_unbound	10:04:07	1
1816507	99	34	22,8	cyclictest	1942303	-21	awk	09:15:00	1
1816507	99	34	21,4	cyclictest	42	1	rcuog/2	09:04:13	1
1816499	99	34	4,24	cyclictest	1897844	-21	kworker/0:2+events	08:40:01	0
1816499	99	34	4,24	cyclictest	1897844	-21	kworker/0:2+events	08:40:01	0
1816499	99	34	26,6	cyclictest	1933207	-21	diskstats	09:09:01	0
1816499	99	34	22,9	cyclictest	1902150	-21	ntpq	08:34:11	0
1816509	99	33	18,3	cyclictest	2121943	-21	fschecks_count	12:19:03	2
1816507	99	33	29,3	cyclictest	1996913	-21	kworker/u8:1+events_unbound	11:09:02	1
1816507	99	33	28,3	cyclictest	1912698	-21	kworker/u8:1+events_unbound	08:59:01	1
1816507	99	33	26,5	cyclictest	2106336	-21	kworker/u8:2+events_unbound	12:14:03	1
1816507	99	33	26,5	cyclictest	2081808	-21	kworker/u8:3+flush-8:0	11:59:12	1
1816507	99	33	26,5	cyclictest	2071681	-21	kworker/u8:0+flush-8:0	12:19:03	1
1816507	99	33	25,6	cyclictest	1796548	-21	kworker/u8:0+flush-8:0	08:24:16	1
1816507	99	33	25,5	cyclictest	1775388	-21	kworker/u8:2+events_unbound	07:18:59	1
1816499	99	33	9,22	cyclictest	2001959	-21	kworker/0:2+events	11:54:05	0
1816499	99	33	9,22	cyclictest	2001959	-21	kworker/0:2+events	11:54:05	0
1816499	99	33	25,6	cyclictest	2041281	-21	grep	10:54:18	0
1816499	99	33	24,7	cyclictest	278	-21	systemd-journal	08:09:07	0
1816499	99	33	24,7	cyclictest	2106301	-21	latency_hist	12:00:00	0
1816499	99	33	22,9	cyclictest	1951577	-21	ntpq	09:24:14	0
1938289	2	32	0,2	sleep2	16	1	rcu_preempt	09:14:03	2
1816509	99	32	27,3	cyclictest	1937575	-21	kworker/u8:2+flush-8:0	09:44:12	2
1816509	99	32	17,3	cyclictest	1933272	-21	fschecks_time	09:09:01	2
1816507	99	32	27,4	cyclictest	1937575	-21	kworker/u8:2+events_unbound	09:44:09	1
1816507	99	32	25,5	cyclictest	2141414	-21	apt-get	12:38:57	1
1816507	99	32	25,5	cyclictest	1987012	-21	kworker/u8:0+events_unbound	11:04:03	1
1816499	99	32	15,14	cyclictest	278	-21	systemd-journal	12:19:08	0
1816499	99	32	1,25	cyclictest	2111300	-21	kworker/0:0+events	12:26:49	0
1816507	99	31	25,5	cyclictest	1900811	-21	kworker/u8:3+flush-8:0	09:21:38	1
1816507	99	31	24,5	cyclictest	2116217	-21	latency_hist	12:10:01	1
1816507	99	31	22,7	cyclictest	278	-21	systemd-journal	11:22:07	1
1816507	99	31	22,7	cyclictest	1862603	-21	kworker/u8:2+flush-8:0	08:14:16	1
1816499	99	31	24,5	cyclictest	1937576	-21	kworker/u8:4+flush-8:0	09:14:03	0
1816499	99	31	23,6	cyclictest	1862603	-21	kworker/u8:2+flush-8:0	08:16:38	0
1816499	99	31	22,7	cyclictest	1849174	-21	diskstats	07:44:01	0
1816499	99	31	20,9	cyclictest	0	-21	swapper/0	10:40:00	0
1816507	99	30	24,5	cyclictest	1937576	-21	kworker/u8:4+flush-8:0	09:19:13	1
1816507	99	30	24,4	cyclictest	1996913	-21	kworker/u8:1+flush-8:0	11:29:07	1
1816507	99	30	24,4	cyclictest	1937575	-21	kworker/u8:2+events_unbound	09:39:15	1
1816507	99	30	23,5	cyclictest	1796548	-21	kworker/u8:0+events_unbound	08:54:01	1
1816499	99	30	2,27	cyclictest	2001959	-21	kworker/0:2+events	11:09:05	0
1816499	99	30	2,26	cyclictest	2111300	-21	kworker/0:0+events	12:34:13	0
1816499	99	30	2,26	cyclictest	2001959	-21	kworker/0:2+events	11:39:17	0
1816499	99	30	2,26	cyclictest	1952220	-21	kworker/0:0+events	10:04:13	0
1816499	99	30	21,7	cyclictest	1892235	-21	ntpq	08:24:10	0
1816499	99	30	21,7	cyclictest	1858272	-21	latency_hist	07:50:01	0
1816499	99	30	1,27	cyclictest	437192	-21	kworker/0:1+events	07:29:17	0
1816499	99	30	1,27	cyclictest	437192	-21	kworker/0:1+events	07:29:17	0
1816507	99	29	23,4	cyclictest	2071681	-21	kworker/u8:0+events_unbound	12:24:10	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2019-05-28 - 00:17