OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #2

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
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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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack0slot2s.osadl.org (updated Tue May 27, 2025 00:44:45)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1826051	2	81	0,0	sleep6	0	-21	swapper/6	21:45:22	6
1747966	2	47	36,8	sleep7	0	-21	swapper/7	19:09:57	7
1151	98	42	0,36	rtkit-daemon	0	-21	swapper/1	19:09:21	1
1747742	2	38	27,8	sleep6	0	-21	swapper/6	19:06:52	6
1746362	2	38	27,7	sleep5	0	-21	swapper/5	19:05:13	5
1747797	2	36	26,7	sleep4	0	-21	swapper/4	19:07:37	4
1747947	2	35	25,7	sleep0	0	-21	swapper/0	19:09:42	0
1748222	99	31	28,2	cyclictest	1898263	-21	kworker/u16:1+flush-8:0	00:29:58	0
1747796	2	31	21,7	sleep3	0	-21	swapper/3	19:07:36	3
1748232	99	30	27,2	cyclictest	1870656	-21	kworker/u16:2+events_unbound	23:35:15	3
1747756	2	30	20,7	sleep2	0	-21	swapper/2	19:07:04	2
1748243	99	28	24,3	cyclictest	1756004	-21	latency_hist	19:24:59	7
1748240	99	28	24,3	cyclictest	1064	-21	systemd-oomd	19:30:17	6
1748240	99	27	23,3	cyclictest	1064	-21	systemd-oomd	20:20:23	6
1748240	99	27	23,3	cyclictest	1064	-21	systemd-oomd	20:15:22	6
1748232	99	27	25,2	cyclictest	1809782	-21	kworker/u16:2+flush-8:0	21:55:25	3
1748232	99	26	24,2	cyclictest	1883565	-21	kworker/u16:1+events_unbound	23:55:21	3
1748240	99	25	23,2	cyclictest	1793091	-21	kworker/u16:4+events_unbound	20:55:15	6
1748232	99	25	23,2	cyclictest	1873145	-21	kworker/u16:0+flush-8:0	00:05:20	3
1748232	99	25	23,2	cyclictest	1809782	-21	kworker/u16:2+flush-8:0	21:14:55	3
1748232	99	25	23,2	cyclictest	1785740	-21	kworker/u16:3+flush-8:0	21:00:17	3
1748232	99	24	22,2	cyclictest	1788179	-21	kworker/u16:2+flush-8:0	20:40:21	3
1748227	99	24	22,2	cyclictest	1854253	-21	kworker/u16:1+flush-8:0	22:50:00	2
1748227	99	24	22,2	cyclictest	1854253	-21	kworker/u16:1+flush-8:0	22:49:59	2
1748227	99	24	21,3	cyclictest	1793091	-21	kworker/u16:4+flush-8:0	20:59:59	2
1748222	99	24	20,3	cyclictest	1826838	-21	kworker/u16:0+flush-8:0	21:49:59	0
1748243	99	23	21,2	cyclictest	1898263	-21	kworker/u16:1+flush-8:0	00:35:25	7
1748243	99	23	21,2	cyclictest	1768625	-21	kworker/u16:2+events_unbound	19:50:18	7
1748232	99	23	21,2	cyclictest	1890963	-21	kworker/u16:4+flush-8:0	00:00:14	3
1748232	99	23	21,2	cyclictest	1865854	-21	kworker/u16:0+flush-8:0	23:14:54	3
1748232	99	23	21,2	cyclictest	1815108	-21	kworker/u16:4+flush-8:0	21:34:55	3
1748232	99	23	21,2	cyclictest	1761290	-21	kworker/u16:0+flush-8:0	19:50:15	3
1748227	99	23	19,3	cyclictest	1760896	-21	latency_hist	19:35:00	2
1748222	99	23	20,2	cyclictest	1880668	-21	kworker/u16:3+flush-8:0	23:44:59	0
1748243	99	22	19,3	cyclictest	1870656	-21	kworker/u16:2+events_unbound	23:35:18	7
1748232	99	22	20,2	cyclictest	1861541	-21	kworker/u16:4+flush-8:0	23:24:55	3
1748224	99	22	20,2	cyclictest	1851756	-21	kworker/u16:4+flush-8:0	22:40:26	1
1748222	99	22	19,2	cyclictest	1812319	-21	kworker/u16:3+flush-8:0	21:40:00	0
1748243	99	21	19,2	cyclictest	1870656	-21	kworker/u16:2+flush-8:0	23:30:18	7
1748243	99	21	19,2	cyclictest	1812319	-21	kworker/u16:3+flush-8:0	21:39:55	7
1748240	99	21	19,2	cyclictest	1812319	-21	kworker/u16:3+events_unbound	21:40:16	6
1748240	99	21	17,3	cyclictest	1819740	-21	cat	21:34:59	6
1748234	99	21	13,7	cyclictest	0	-21	swapper/4	20:47:28	4
1748232	99	21	19,2	cyclictest	1785740	-21	kworker/u16:3+flush-8:0	20:59:56	3
1748232	99	21	19,2	cyclictest	1763733	-21	kworker/u16:3+flush-8:0	19:44:55	3
1748232	99	21	19,2	cyclictest	1750910	-21	kworker/u16:5+flush-8:0	19:25:26	3
1748232	99	21	18,2	cyclictest	1802854	-21	kworker/u16:1+events_unbound	21:20:16	3
1748232	99	21	17,3	cyclictest	1863657	-21	latency_hist	23:05:00	3
1748227	99	21	17,3	cyclictest	1834299	-21	latency_hist	22:05:00	2
1748224	99	21	14,6	cyclictest	0	-21	swapper/1	21:42:51	1
1748222	99	21	19,2	cyclictest	1826838	-21	kworker/u16:0+flush-8:0	22:15:25	0
1748222	99	21	17,3	cyclictest	1802854	-21	kworker/u16:1+events_unbound	21:05:00	0
1748222	99	21	17,3	cyclictest	1064	-21	systemd-oomd	20:39:59	0
1748243	99	20	18,2	cyclictest	1873145	-21	kworker/u16:0+flush-8:0	00:15:19	7
1748243	99	20	18,2	cyclictest	1812319	-21	kworker/u16:3+events_unbound	22:50:20	7
1748237	99	20	16,3	cyclictest	1064	-21	systemd-oomd	21:08:28	5
1748234	99	20	16,3	cyclictest	1868630	-21	cat	23:15:00	4
1748234	99	20	16,3	cyclictest	1064	-21	systemd-oomd	20:23:46	4
1748232	99	20	18,2	cyclictest	1826838	-21	kworker/u16:0+events_unbound	22:00:24	3
1748232	99	20	18,2	cyclictest	1763733	-21	kworker/u16:3+events_unbound	20:10:24	3
1748232	99	20	18,2	cyclictest	1763733	-21	kworker/u16:3+events_unbound	20:10:24	3
1748227	99	20	16,3	cyclictest	1831827	-21	cat	21:59:55	2
1748224	99	20	18,2	cyclictest	1763733	-21	kworker/u16:3+flush-8:0	20:09:59	1
1748243	99	19	17,2	cyclictest	1887816	-21	kworker/u16:2+flush-8:0	00:05:14	7
1748243	99	19	17,2	cyclictest	1870656	-21	kworker/u16:2+flush-8:0	23:19:54	7
1748243	99	19	17,2	cyclictest	1812319	-21	kworker/u16:3+flush-8:0	21:24:55	7
1748237	99	19	15,3	cyclictest	1795147	-21	latency_hist	20:45:00	5
1748234	99	19	17,2	cyclictest	1763733	-21	kworker/u16:3+flush-8:0	19:50:00	4
1748232	99	19	17,2	cyclictest	1844466	-21	kworker/u16:0+flush-8:0	22:55:25	3
1748232	99	19	17,2	cyclictest	1800008	-21	kworker/u16:0+events_unbound	21:05:15	3
1748232	99	19	15,3	cyclictest	1064	-21	systemd-oomd	19:15:21	3
1748224	99	19	17,2	cyclictest	1873145	-21	kworker/u16:0+flush-8:0	23:49:59	1
1748224	99	19	15,3	cyclictest	1902837	-21	latency_hist	00:24:58	1
1748222	99	19	0,18	cyclictest	1817186	-21	awk	21:29:58	0
1748243	99	18	16,2	cyclictest	1780374	-21	kworker/u16:2+flush-8:0	20:14:54	7
1748243	99	18	16,2	cyclictest	1780374	-21	kworker/u16:2+flush-8:0	20:14:54	7
1748240	99	18	16,2	cyclictest	1722623	-21	kworker/u16:1+events_unbound	20:10:01	6
1748240	99	18	16,2	cyclictest	1722623	-21	kworker/u16:1+events_unbound	20:10:01	6
1748237	99	18	15,2	cyclictest	1295	-21	snmpd	22:40:10	5
1748237	99	18	15,2	cyclictest	1295	-21	snmpd	21:17:03	5
1748237	99	18	14,3	cyclictest	1829394	-21	latency_hist	21:54:59	5
1748234	99	18	16,2	cyclictest	1880668	-21	kworker/u16:3+flush-8:0	23:39:59	4
1748234	99	18	13,4	cyclictest	1064	-21	systemd-oomd	00:33:00	4
1748234	99	18	0,2	cyclictest	1772940	-21	systemd-userwor	20:02:54	4
1748232	99	18	16,2	cyclictest	1873145	-21	kworker/u16:0+flush-8:0	00:10:17	3
1748232	99	18	15,2	cyclictest	1873145	-21	kworker/u16:0+flush-8:0	23:45:15	3
1748232	99	18	14,3	cyclictest	1064	-21	systemd-oomd	22:10:23	3
1748227	99	18	14,3	cyclictest	1897945	-21	latency_hist	00:14:59	2
1748224	99	18	14,3	cyclictest	1064	-21	systemd-oomd	19:15:01	1
1748222	99	18	14,3	cyclictest	1064	-21	systemd-oomd	21:55:21	0
1748243	99	17	15,2	cyclictest	1785740	-21	kworker/u16:3+flush-8:0	20:30:24	7
1748243	99	17	14,3	cyclictest	1788179	-21	kworker/u16:2+flush-8:0	20:50:00	7
1748240	99	17	15,2	cyclictest	1809782	-21	kworker/u16:2+events_unbound	22:00:06	6
1748240	99	17	13,3	cyclictest	1064	-21	systemd-oomd	22:20:16	6
1748234	99	17	13,3	cyclictest	1064	-21	systemd-oomd	23:52:45	4
1748234	99	17	13,3	cyclictest	1064	-21	systemd-oomd	22:40:02	4
1748234	99	17	0,1	cyclictest	0	-21	swapper/4	20:08:02	4
1748234	99	17	0,1	cyclictest	0	-21	swapper/4	19:56:45	4
1748232	99	17	15,2	cyclictest	1898263	-21	kworker/u16:1+flush-8:0	00:29:54	3
1748232	99	17	15,2	cyclictest	1844466	-21	kworker/u16:0+events_unbound	22:25:25	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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