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 Sun Nov 30, 2025 12:44:17)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1851505	99	64	52,9	cyclictest	282	-21	systemd-journal	11:20:00	0
1851505	99	64	52,9	cyclictest	282	-21	systemd-journal	11:19:59	0
1851505	99	64	52,9	cyclictest	2111957	-21	apt-get	11:30:01	0
1851505	99	64	52,9	cyclictest	2111957	-21	apt-get	11:30:00	0
1851507	99	63	56,5	cyclictest	1851682	-21	kworker/u8:3+flush-8:0	07:36:26	1
1851507	99	62	56,3	cyclictest	1918243	-21	kworker/u8:1+events_unbound	09:31:25	1
1851507	99	62	56,3	cyclictest	1918243	-21	kworker/u8:1+events_unbound	09:31:25	1
1982859	2	61	0,3	sleep1	1982858	-21	apt	09:20:00	1
1851507	99	57	50,4	cyclictest	1958265	-21	kworker/u8:0+events_unbound	10:31:29	1
1851507	99	56	52,3	cyclictest	1923242	-21	kworker/u8:3+flush-8:0	08:26:26	1
1851507	99	55	50,3	cyclictest	1918243	-21	kworker/u8:1+flush-8:0	09:01:25	1
1851507	99	55	49,4	cyclictest	2018046	-21	kworker/u8:1+events_unbound	10:06:20	1
1851507	99	54	48,4	cyclictest	1958265	-21	kworker/u8:0+events_unbound	10:21:15	1
2065403	2	53	0,2	sleep3	586	-21	kworker/3:2+mm_percpu_wq	10:41:16	3
2121807	2	52	0,4	chrt	0	-21	swapper/0	11:36:31	0
1851507	99	52	45,5	cyclictest	2096864	-21	kworker/u8:2+flush-8:0	12:11:23	1
1851507	99	52	45,5	cyclictest	1943122	-21	latency_hist	08:40:01	1
1851507	99	51	45,4	cyclictest	1883384	-21	kworker/u8:2+flush-8:0	07:51:25	1
1851507	99	51	44,5	cyclictest	1958265	-21	kworker/u8:0+events_unbound	10:16:09	1
1851505	99	51	46,3	cyclictest	1973148	-21	kworker/u8:2+flush-8:0	09:26:14	0
1851505	99	51	46,3	cyclictest	1973148	-21	kworker/u8:2+flush-8:0	09:26:13	0
1851507	99	50	43,5	cyclictest	2116882	-21	kworker/u8:3+events_unbound	11:36:25	1
1851507	99	50	43,5	cyclictest	2096864	-21	kworker/u8:2+events_unbound	12:01:13	1
1851507	99	50	43,5	cyclictest	1883384	-21	kworker/u8:2+flush-8:0	08:46:21	1
1851507	99	50	40,7	cyclictest	1998263	-21	/usr/sbin/munin	09:36:21	1
1851505	99	50	42,5	cyclictest	2072364	-21	latency_hist	10:50:01	0
1851507	99	49	44,4	cyclictest	1877911	-21	kworker/u8:1+events_unbound	07:56:15	1
1851507	99	49	43,4	cyclictest	2156481	-21	kworker/u8:1+flush-8:0	12:21:19	1
1851507	99	49	43,4	cyclictest	1799523	-21	kworker/u8:2+flush-8:0	07:16:22	1
1851507	99	49	43,3	cyclictest	2111650	-21	kworker/u8:0+events_unbound	11:46:10	1
1851507	99	49	42,4	cyclictest	282	-21	systemd-journal	10:46:07	1
1851505	99	49	43,4	cyclictest	1927969	-21	apt-get	08:25:01	0
1851507	99	48	43,4	cyclictest	2096864	-21	kworker/u8:2+flush-8:0	12:26:26	1
1851507	99	48	42,5	cyclictest	2018046	-21	kworker/u8:1+flush-8:0	10:11:22	1
1851507	99	47	43,3	cyclictest	2052795	-21	kworker/u8:1+flush-8:0	10:36:25	1
1851507	99	47	43,3	cyclictest	1958265	-21	kworker/u8:0+events_unbound	10:51:11	1
1851507	99	47	41,5	cyclictest	1832130	-21	kworker/u8:0+events_unbound	08:06:20	1
1851507	99	47	41,4	cyclictest	1883384	-21	kworker/u8:2+flush-8:0	07:41:29	1
1878865	2	46	0,2	chrt	0	-21	swapper/0	07:36:13	0
1851507	99	46	42,3	cyclictest	2052795	-21	kworker/u8:1+events_unbound	11:06:10	1
1851507	99	46	40,4	cyclictest	2052795	-21	kworker/u8:1+flush-8:0	11:11:18	1
1851507	99	46	38,6	cyclictest	1972034	-21	ntpq	09:06:19	1
1851507	99	45	40,3	cyclictest	1851682	-21	kworker/u8:3+events_unbound	07:26:13	1
1851507	99	45	39,4	cyclictest	1851682	-21	kworker/u8:3+events_unbound	07:31:21	1
1851507	99	44	38,4	cyclictest	2081734	-21	kworker/u8:3+flush-8:0	11:01:27	1
1851507	99	44	37,5	cyclictest	2047299	-21	kworker/u8:3+events_unbound	10:26:10	1
1851505	99	44	39,4	cyclictest	1918243	-21	kworker/u8:1+flush-8:0	09:06:23	0
1851507	99	43	39,3	cyclictest	1958265	-21	kworker/u8:0+flush-8:0	10:01:27	1
1851507	99	43	38,4	cyclictest	2052795	-21	kworker/u8:1+events_unbound	10:41:09	1
1851507	99	43	38,3	cyclictest	1918243	-21	kworker/u8:1+flush-8:0	08:51:22	1
1851507	99	43	37,4	cyclictest	1958265	-21	kworker/u8:0+events_unbound	11:16:19	1
1851507	99	43	37,4	cyclictest	1958265	-21	kworker/u8:0+events_unbound	11:16:19	1
1851505	99	43	38,3	cyclictest	2018046	-21	kworker/u8:1+flush-8:0	10:06:28	0
1851507	99	42	37,4	cyclictest	1883384	-21	kworker/u8:2+flush-8:0	07:46:08	1
1851507	99	42	36,4	cyclictest	1973148	-21	kworker/u8:2+flush-8:0	10:56:12	1
1851507	99	42	35,5	cyclictest	1883384	-21	kworker/u8:2+events_unbound	08:11:11	1
1851507	99	42	34,5	cyclictest	2136978	-21	latency_hist	11:55:01	1
1851507	99	41	38,2	cyclictest	1973148	-21	kworker/u8:2+flush-8:0	09:26:12	1
1851507	99	41	38,2	cyclictest	1973148	-21	kworker/u8:2+flush-8:0	09:26:12	1
1851507	99	41	36,4	cyclictest	1958265	-21	kworker/u8:0+flush-8:0	09:56:23	1
1851507	99	41	34,5	cyclictest	1918243	-21	kworker/u8:1+events_unbound	08:21:23	1
1851507	99	41	31,8	cyclictest	2150957	-21	ntpq	12:06:20	1
1851505	99	41	36,4	cyclictest	1799523	-21	kworker/u8:2+events_unbound	07:10:01	0
1851505	99	41	33,5	cyclictest	2002911	-21	latency_hist	09:40:00	0
1851505	99	40	35,4	cyclictest	1851682	-21	kworker/u8:3+events_unbound	07:31:14	0
1967154	2	39	0,2	sleep0	20	1	rcuc/0	09:01:21	0
1851510	99	39	24,13	cyclictest	1983232	-21	aten2_r5power_c	09:21:07	2
1851510	99	39	24,13	cyclictest	1983232	-21	aten2_r5power_c	09:21:06	2
1851510	99	39	20,17	cyclictest	1952135	-21	needreboot	08:46:19	2
1851507	99	39	33,4	cyclictest	1832130	-21	kworker/u8:0+flush-8:0	08:16:17	1
1851507	99	39	31,6	cyclictest	2176540	-21	latency_hist	12:35:01	1
1851505	99	39	30,7	cyclictest	2091365	-21	ntpq	11:06:32	0
1851510	99	38	27,8	cyclictest	282	-21	systemd-journal	10:35:00	2
1851507	99	38	34,3	cyclictest	2096864	-21	kworker/u8:2+flush-8:0	11:21:12	1
1851507	99	38	32,4	cyclictest	1918243	-21	kworker/u8:1+flush-8:0	08:56:12	1
1851507	99	38	29,6	cyclictest	282	-21	systemd-journal	08:01:14	1
1851507	99	38	27,8	cyclictest	2111106	-21	ntpq	11:26:20	1
1851507	99	38	27,8	cyclictest	2111106	-21	ntpq	11:26:20	1
1851505	99	38	29,7	cyclictest	2131231	-21	ntpq	11:46:20	0
1851507	99	37	31,4	cyclictest	2096864	-21	kworker/u8:2+events_unbound	11:41:29	1
1851507	99	37	30,5	cyclictest	1799523	-21	kworker/u8:2+events_unbound	07:21:16	1
1851507	99	37	30,5	cyclictest	1799523	-21	kworker/u8:2+events_unbound	07:21:16	1
1851505	99	37	27,7	cyclictest	2062478	-21	latency_hist	10:40:01	0
1851510	99	36	22,12	cyclictest	2072808	-21	aten2_r5power_v	10:51:12	2
1851510	99	36	22,12	cyclictest	1918400	-21	aten2_r5power_e	08:16:10	2
1851510	99	36	22,12	cyclictest	1908534	-21	aten2_r5power_p	08:06:09	2
1851507	99	36	30,5	cyclictest	1883384	-21	kworker/u8:2+events_unbound	08:31:21	1
1851505	99	36	31,4	cyclictest	2047299	-21	kworker/u8:3+events_unbound	10:26:17	0
1851505	99	36	29,5	cyclictest	1893915	-21	diskstats	07:51:21	0
1851505	99	36	26,8	cyclictest	2077899	-21	diskstats	10:56:11	0
1851505	99	36	25,9	cyclictest	1958598	-21	diskstats	08:56:11	0
1851507	99	35	31,3	cyclictest	2136706	-21	kworker/u8:3+flush-8:0	11:56:16	1
1851507	99	35	30,4	cyclictest	1851682	-21	kworker/u8:3+flush-8:0	07:11:16	1
1851507	99	35	28,5	cyclictest	1918243	-21	kworker/u8:1+flush-8:0	09:11:20	1
1851507	99	35	28,5	cyclictest	1918243	-21	kworker/u8:1+events_unbound	09:21:16	1
1851507	99	35	28,5	cyclictest	1918243	-21	kworker/u8:1+events_unbound	09:21:16	1
1851505	99	35	30,3	cyclictest	1856383	-21	latency_hist	07:15:01	0
1851505	99	35	26,7	cyclictest	2038220	-21	diskstats	10:16:11	0
1851510	99	34	24,8	cyclictest	1928396	-21	cp	08:25:00	2
1851510	99	34	19,13	cyclictest	2091816	-21	unixbench_multi	11:06:38	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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