OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #b, slot #2

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: performance
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackbslot2.osadl.org (updated Thu Nov 06, 2025 12:44:43)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1327439	2	243	187,20	sleep1	0	-21	swapper/1	07:09:45	1
1327341	2	226	198,19	sleep0	0	-21	swapper/0	07:08:31	0
1327314	2	225	175,40	sleep3	0	-21	swapper/3	07:08:10	3
1327283	2	222	194,19	sleep2	0	-21	swapper/2	07:07:45	2
1327633	99	70	63,2	cyclictest	1587950	-21	kworker/u8:2+events_unbound	12:10:15	0
1327633	99	70	63,2	cyclictest	1587950	-21	kworker/u8:2+events_unbound	12:10:15	0
1327637	99	66	63,2	cyclictest	1409483	-21	munin-update	08:45:00	1
1327633	99	63	5,57	cyclictest	1601309	-21	kworker/u8:2+efi_rts_wq	12:38:34	0
1327633	99	59	50,8	cyclictest	1370956	-21	kworker/u8:1+events_unbound	08:20:14	0
1327640	99	51	49,2	cyclictest	1601309	-21	kworker/u8:2+events_unbound	12:38:32	2
1327640	99	49	23,24	cyclictest	1514323	-21	chrome	10:45:01	2
1327633	99	49	42,6	cyclictest	1322805	-21	kworker/u8:1+events_unbound	07:30:10	0
1327637	99	47	44,2	cyclictest	1597022	-21	kworker/u8:1+flush-179:0	12:20:15	1
1327637	99	47	41,4	cyclictest	1388149	-21	latency_hist	08:20:02	1
1327633	99	47	40,6	cyclictest	1470514	-21	kworker/u8:0+events_unbound	10:00:10	0
1533381	2	46	0,1	sleep0	0	-21	swapper/0	11:05:10	0
1327640	99	46	42,3	cyclictest	1453211	-21	latency_hist	09:35:01	2
1327637	99	46	43,2	cyclictest	1262752	-21	kworker/u8:3+flush-179:0	07:25:05	1
1327637	99	44	40,3	cyclictest	1518764	-21	/usr/share/muni	10:50:04	1
1327633	99	44	41,2	cyclictest	1396375	-21	kworker/u8:2+flush-179:0	08:35:16	0
1327633	99	44	35,2	cyclictest	1336446	-21	kworker/u8:0+events_unbound	07:45:07	0
1327633	99	44	34,2	cyclictest	1413233	-21	kworker/u8:3+events_unbound	09:05:00	0
1327637	99	43	40,2	cyclictest	1601845	-21	/usr/share/muni	12:25:12	1
1327637	99	43	40,2	cyclictest	1318	-21	snmpd	07:55:20	1
1327633	99	43	40,2	cyclictest	1322805	-21	kworker/u8:1+flush-179:0	07:20:09	0
1327640	99	42	37,3	cyclictest	1341239	-21	/usr/share/muni	07:25:01	2
1327633	99	42	38,3	cyclictest	1388214	-21	kworker/u8:0+events_unbound	08:25:24	0
1327633	99	42	35,6	cyclictest	1262752	-21	kworker/u8:3+events_unbound	07:55:05	0
1327644	99	41	37,3	cyclictest	1262752	-21	kworker/u8:3+events_unbound	08:10:14	3
1327640	99	41	38,2	cyclictest	1566726	-21	snmp_wanpowerct	11:45:02	2
1327637	99	41	38,2	cyclictest	1388214	-21	kworker/u8:0+flush-179:0	09:25:15	1
1327637	99	41	38,2	cyclictest	1388214	-21	kworker/u8:0+flush-179:0	09:10:14	1
1327633	99	41	37,3	cyclictest	1388214	-21	kworker/u8:0+flush-179:0	08:55:04	0
1327633	99	41	34,6	cyclictest	1453162	-21	kworker/u8:2+events_unbound	09:35:06	0
1327644	99	40	37,2	cyclictest	1322805	-21	kworker/u8:1+flush-179:0	07:30:15	3
1327640	99	40	38,1	cyclictest	1422206	-21	kworker/2:2+pm	09:05:49	2
1327640	99	40	38,1	cyclictest	1318	-21	snmpd	08:38:21	2
1327637	99	40	37,2	cyclictest	1483311	-21	kworker/u8:2+flush-179:0	10:10:27	1
1327637	99	40	32,3	cyclictest	1453162	-21	kworker/u8:2+flush-179:0	09:50:10	1
1327633	99	40	35,4	cyclictest	1440010	-21	latency_hist	09:20:01	0
1327633	99	40	35,3	cyclictest	1571099	-21	/usr/share/muni	11:50:02	0
1327633	99	40	33,2	cyclictest	1417993	-21	kworker/u8:1+events_unbound	09:05:31	0
1327633	99	40	32,7	cyclictest	1601309	-21	kworker/u8:2+events_unbound	12:35:01	0
1327644	99	39	34,3	cyclictest	1435916	-21	/usr/share/muni	09:15:04	3
1327640	99	39	37,1	cyclictest	1422206	-21	kworker/2:2+pm	11:30:50	2
1327640	99	39	37,1	cyclictest	1422206	-21	kworker/2:2+pm	11:30:50	2
1327640	99	39	37,1	cyclictest	1422206	-21	kworker/2:2+pm	09:45:57	2
1327640	99	39	37,1	cyclictest	1169334	-21	kworker/2:0+pm	07:55:29	2
1327640	99	39	36,2	cyclictest	1516345	-21	kworker/u8:0+flush-179:0	12:15:14	2
1327640	99	39	36,2	cyclictest	1422206	-21	kworker/2:2+pm	09:01:08	2
1327640	99	39	36,2	cyclictest	1169334	-21	kworker/2:0+pm	08:20:03	2
1327640	99	39	1,1	cyclictest	1496584	-31	munin-html	10:20:32	2
1327637	99	39	35,3	cyclictest	1566005	-21	kworker/u8:1+flush-179:0	11:50:16	1
1327633	99	39	37,2	cyclictest	1470514	-21	kworker/u8:0+flush-179:0	10:05:12	0
1327633	99	39	36,2	cyclictest	1336446	-21	kworker/u8:0+flush-179:0	07:40:26	0
1327644	99	38	35,2	cyclictest	1202626	-1	kworker/3:1H+kblockd	09:20:17	3
1327644	99	38	34,3	cyclictest	1597022	-21	kworker/u8:1+flush-179:0	12:30:12	3
1327644	99	38	34,3	cyclictest	1462051	-21	/usr/share/muni	09:45:11	3
1327640	99	38	37,1	cyclictest	1422206	-21	kworker/2:2+pm	10:15:05	2
1327640	99	38	37,1	cyclictest	1169334	-21	kworker/2:0+pm	08:12:30	2
1327640	99	38	36,1	cyclictest	1571329	-21	kworker/2:1+pm	12:31:28	2
1327640	99	38	36,1	cyclictest	1571329	-21	kworker/2:1+pm	12:00:45	2
1327640	99	38	36,1	cyclictest	1571329	-21	kworker/2:1+pm	12:00:45	2
1327640	99	38	36,1	cyclictest	1422206	-21	kworker/2:2+pm	11:23:43	2
1327640	99	38	36,1	cyclictest	1422206	-21	kworker/2:2+pm	11:00:05	2
1327640	99	38	36,1	cyclictest	1422206	-21	kworker/2:2+pm	10:35:27	2
1327640	99	38	36,1	cyclictest	1422206	-21	kworker/2:2+pm	09:24:59	2
1327640	99	38	36,1	cyclictest	1169334	-21	kworker/2:0+pm	08:28:12	2
1327640	99	38	36,1	cyclictest	1169334	-21	kworker/2:0+pm	08:00:45	2
1327640	99	38	35,2	cyclictest	1422206	-21	kworker/2:2+pm	11:10:45	2
1327640	99	38	35,2	cyclictest	1422206	-21	kworker/2:2+pm	10:50:04	2
1327637	99	38	35,2	cyclictest	1505396	-21	kworker/u8:4+flush-179:0	10:35:15	1
1327637	99	38	34,3	cyclictest	1528202	-21	kworker/u8:2+events_unbound	11:20:01	1
1327637	99	38	34,3	cyclictest	1322805	-21	kworker/u8:1+events_unbound	07:20:15	1
1327637	99	38	33,4	cyclictest	1375779	-21	ntpq	08:05:04	1
1327637	99	38	32,2	cyclictest	1587950	-21	kworker/u8:2+events_unbound	12:10:13	1
1327637	99	38	32,2	cyclictest	1587950	-21	kworker/u8:2+events_unbound	12:10:13	1
1327633	99	38	35,2	cyclictest	1516345	-21	kworker/u8:0+events_unbound	11:35:00	0
1327633	99	38	35,2	cyclictest	1516345	-21	kworker/u8:0+events_unbound	11:35:00	0
1327633	99	38	34,3	cyclictest	1391845	-21	kworker/u8:4+events_unbound	08:45:23	0
1327644	99	37	36,1	cyclictest	0	-21	swapper/3	11:01:25	3
1327644	99	37	34,2	cyclictest	1383518	-21	kworker/3:1+pm	08:15:10	3
1327644	99	37	34,2	cyclictest	1202626	-1	kworker/3:1H+kblockd	12:21:04	3
1327644	99	37	34,2	cyclictest	1202626	-1	kworker/3:1H+kblockd	11:45:08	3
1327644	99	37	34,2	cyclictest	1202626	-1	kworker/3:1H+kblockd	09:30:44	3
1327644	99	37	34,2	cyclictest	1202626	-1	kworker/3:1H+kblockd	09:25:53	3
1327644	99	37	34,2	cyclictest	1202626	-1	kworker/3:1H+kblockd	08:45:02	3
1327644	99	37	34,2	cyclictest	1202626	-1	kworker/3:1H+kblockd	08:28:45	3
1327644	99	37	29,5	cyclictest	1484303	-21	/usr/share/muni	10:10:14	3
1327640	99	37	36,1	cyclictest	1571329	-21	kworker/2:1+pm	12:10:07	2
1327640	99	37	36,1	cyclictest	1571329	-21	kworker/2:1+pm	12:10:07	2
1327640	99	37	35,2	cyclictest	1516345	-21	kworker/u8:0+events_unbound	11:05:20	2
1327640	99	37	35,1	cyclictest	1422206	-21	kworker/2:2+pm	10:01:24	2
1327640	99	37	35,1	cyclictest	1169334	-21	kworker/2:0+pm	07:50:04	2
1327640	99	37	34,2	cyclictest	1169334	-21	kworker/2:0+pm	07:45:03	2
1327640	99	37	34,2	cyclictest	1141811	-1	kworker/2:2H+kblockd	07:11:05	2
1327640	99	37	33,3	cyclictest	1431677	-21	/usr/share/muni	09:10:14	2
1327640	99	37	33,3	cyclictest	1385189	-21	ntpq	08:15:08	2
1327640	99	37	1,35	cyclictest	1397180	-21	ntp_states	08:30:04	2
1327637	99	37	34,2	cyclictest	1516345	-21	kworker/u8:0+flush-179:0	10:50:00	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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