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 Mon Dec 29, 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
685315	2	233	202,20	sleep2	0	-21	swapper/2	07:07:44	2
685348	2	228	199,19	sleep0	0	-21	swapper/0	07:08:12	0
685284	2	225	177,39	sleep1	0	-21	swapper/1	07:07:19	1
685201	2	221	192,19	sleep3	0	-21	swapper/3	07:06:18	3
690494	2	133	0,1	sleep2	690430	-21	snmp_wlanswitch	07:15:01	2
685627	99	94	1,91	cyclictest	820487	-21	chrome	09:45:02	0
685627	99	54	49,4	cyclictest	710516	-21	kworker/u8:4+events_unbound	07:50:12	0
685627	99	54	49,4	cyclictest	710516	-21	kworker/u8:4+events_unbound	07:50:12	0
685637	99	52	39,12	cyclictest	777034	-21	kworker/u8:2+flush-179:0	09:00:24	3
685637	99	51	48,2	cyclictest	889520	-21	kworker/u8:0+flush-179:0	11:30:13	3
685632	99	50	18,31	cyclictest	0	-21	swapper/1	11:42:12	1
695552	2	49	0,1	chrt	695477	-21	snmp_ryswitch2.	07:20:01	1
685637	99	49	46,2	cyclictest	833319	-21	kworker/u8:5+events_unbound	10:10:04	3
685637	99	48	44,3	cyclictest	907128	-21	/usr/share/muni	11:25:07	3
685634	99	47	40,5	cyclictest	963279	-21	munin-node	12:30:01	2
685632	99	47	43,1	cyclictest	924254	-21	/usr/share/muni	11:45:01	1
685627	99	47	41,4	cyclictest	859919	-21	/usr/share/muni	10:30:15	0
685637	99	46	43,2	cyclictest	698211	-21	kworker/u8:1+flush-179:0	07:35:15	3
685627	99	46	40,4	cyclictest	738015	-21	munin-update	08:10:15	0
685637	99	45	34,10	cyclictest	833319	-21	kworker/u8:5+flush-179:0	10:35:05	3
685634	99	45	41,2	cyclictest	872826	-21	snmp_ryswitch.c	10:45:00	2
685634	99	45	40,4	cyclictest	777034	-21	kworker/u8:2+flush-179:0	08:55:15	2
685632	99	45	41,3	cyclictest	705802	-21	apt-get	07:30:13	1
685637	99	44	40,3	cyclictest	795180	-21	kworker/u8:1+flush-179:0	09:20:13	3
685637	99	44	40,3	cyclictest	795180	-21	kworker/u8:1+flush-179:0	09:20:12	3
685637	99	44	37,3	cyclictest	828976	-21	kworker/u8:0+events_unbound	10:00:15	3
685637	99	44	30,13	cyclictest	915087	-21	kworker/u8:3+flush-179:0	11:35:05	3
685634	99	44	39,4	cyclictest	937217	-21	/usr/share/muni	12:00:13	2
685632	99	43	37,4	cyclictest	691901	-21	apt-get	07:15:07	1
685627	99	43	40,2	cyclictest	763771	-21	kworker/u8:0+flush-179:0	08:40:10	0
685637	99	42	39,2	cyclictest	940958	-21	kworker/u8:2+events_unbound	12:10:15	3
685637	99	42	39,2	cyclictest	742291	-21	kworker/u8:0+flush-179:0	08:20:15	3
685637	99	42	38,3	cyclictest	855232	-21	kworker/u8:2+flush-179:0	10:30:00	3
685632	99	42	24,17	cyclictest	399313	-1	kworker/1:2H+kblockd	12:35:04	1
685634	99	41	37,2	cyclictest	820532	-21	snmp_wanswitch.	09:45:01	2
685634	99	41	35,4	cyclictest	716788	-21	ThreadPoolForeg	07:45:19	2
685632	99	41	36,4	cyclictest	767401	-21	ntpq	08:40:25	1
685627	99	41	38,2	cyclictest	846419	-21	kworker/u8:3+flush-179:0	10:15:12	0
685637	99	40	26,13	cyclictest	833319	-21	kworker/u8:5+events_unbound	10:15:24	3
685634	99	40	37,2	cyclictest	942263	-21	kworker/2:0+pm	12:20:12	2
685634	99	40	37,2	cyclictest	733780	-21	kworker/2:1+pm	08:05:27	2
685634	99	40	34,4	cyclictest	833886	-21	/usr/share/muni	10:00:08	2
685632	99	40	29,9	cyclictest	716705	-13	Chrome_IOThread	07:45:01	1
685627	99	40	39,0	cyclictest	926977	-21	awk	11:45:17	0
685627	99	40	35,4	cyclictest	842394	-21	/usr/share/muni	10:10:10	0
685637	99	39	36,2	cyclictest	815657	-21	kworker/u8:2+events_unbound	10:05:24	3
685637	99	39	36,2	cyclictest	789186	-21	kworker/u8:3+flush-179:0	09:50:27	3
685637	99	39	36,2	cyclictest	703227	-21	kworker/u8:0+events_unbound	07:50:25	3
685637	99	39	36,2	cyclictest	703227	-21	kworker/u8:0+events_unbound	07:50:25	3
685634	99	39	37,1	cyclictest	942263	-21	kworker/2:0+pm	12:25:26	2
685634	99	39	37,1	cyclictest	915526	-21	kworker/2:0+pm	11:50:29	2
685634	99	39	37,1	cyclictest	777096	-21	kworker/2:2+pm	10:15:59	2
685634	99	39	37,1	cyclictest	777096	-21	kworker/2:2+pm	09:26:28	2
685634	99	39	37,1	cyclictest	777096	-21	kworker/2:2+pm	09:24:20	2
685634	99	39	37,1	cyclictest	777096	-21	kworker/2:2+pm	09:24:20	2
685634	99	39	37,1	cyclictest	777096	-21	kworker/2:2+pm	09:10:27	2
685634	99	39	37,1	cyclictest	632964	-21	kworker/2:1+pm	07:20:28	2
685634	99	39	37,1	cyclictest	632964	-21	kworker/2:1+pm	07:10:46	2
685634	99	39	36,2	cyclictest	915526	-21	kworker/2:0+pm	11:41:05	2
685634	99	39	36,2	cyclictest	777096	-21	kworker/2:2+pm	11:00:28	2
685634	99	39	35,3	cyclictest	781381	-21	kworker/u8:1+events_unbound	09:05:14	2
685634	99	39	34,3	cyclictest	767925	-31	munin-html	08:40:33	2
685627	99	39	36,2	cyclictest	868080	-21	kworker/u8:3+events_unbound	11:00:32	0
963435	2	38	0,1	sleep3	963437	-21	/usr/sbin/munin	12:30:02	3
685637	99	38	35,2	cyclictest	710516	-21	kworker/u8:4+flush-179:0	08:10:14	3
685637	99	38	34,2	cyclictest	37582	-1	kworker/3:1H+kblockd	08:55:50	3
685637	99	38	34,2	cyclictest	37582	-1	kworker/3:1H+kblockd	08:05:11	3
685637	99	38	33,4	cyclictest	811904	-21	/usr/share/muni	09:35:06	3
685637	99	38	26,11	cyclictest	940958	-21	kworker/u8:2+flush-179:0	12:15:29	3
685634	99	38	36,1	cyclictest	777096	-21	kworker/2:2+pm	10:10:53	2
685634	99	38	36,1	cyclictest	777096	-21	kworker/2:2+pm	10:09:51	2
685634	99	38	36,1	cyclictest	777096	-21	kworker/2:2+pm	09:56:03	2
685634	99	38	36,1	cyclictest	777096	-21	kworker/2:2+pm	09:00:48	2
685634	99	38	36,1	cyclictest	632964	-21	kworker/2:1+pm	07:40:28	2
685634	99	38	36,1	cyclictest	632964	-21	kworker/2:1+pm	07:33:18	2
685634	99	38	35,2	cyclictest	777096	-21	kworker/2:2+pm	11:05:02	2
685634	99	38	35,2	cyclictest	777096	-21	kworker/2:2+pm	10:55:00	2
685634	99	38	35,2	cyclictest	777096	-21	kworker/2:2+pm	09:40:05	2
685634	99	38	35,2	cyclictest	632964	-21	kworker/2:1+pm	07:35:37	2
685634	99	38	33,3	cyclictest	3724978	-1	kworker/2:1H+kblockd	12:10:03	2
685632	99	38	34,2	cyclictest	399313	-1	kworker/1:2H+kblockd	08:05:38	1
685632	99	38	33,3	cyclictest	399313	-1	kworker/1:2H+kblockd	08:45:10	1
685632	99	38	14,23	cyclictest	29	-21	ksoftirqd/1	08:23:33	1
685627	99	38	36,1	cyclictest	1318	-21	snmpd	07:42:14	0
685627	99	38	35,3	cyclictest	789185	-21	kworker/u8:0+flush-179:0	09:15:27	0
685627	99	38	35,3	cyclictest	789185	-21	kworker/u8:0+flush-179:0	09:15:26	0
685627	99	38	35,2	cyclictest	850781	-21	kworker/u8:0+flush-179:0	10:40:16	0
685637	99	37	34,2	cyclictest	833319	-21	kworker/u8:5+events_unbound	11:10:12	3
685637	99	37	34,2	cyclictest	37582	-1	kworker/3:1H+kblockd	11:21:06	3
685637	99	37	31,5	cyclictest	37582	-1	kworker/3:1H+kblockd	09:27:44	3
685634	99	37	36,1	cyclictest	632964	-21	kworker/2:1+pm	07:25:17	2
685634	99	37	35,1	cyclictest	915526	-21	kworker/2:0+pm	11:35:11	2
685634	99	37	35,1	cyclictest	777096	-21	kworker/2:2+pm	11:18:42	2
685634	99	37	35,1	cyclictest	777096	-21	kworker/2:2+pm	10:35:38	2
685634	99	37	35,1	cyclictest	777096	-21	kworker/2:2+pm	10:25:05	2
685634	99	37	35,1	cyclictest	777096	-21	kworker/2:2+pm	09:30:37	2
685634	99	37	35,1	cyclictest	742389	-21	kworker/2:0+pm	08:31:22	2
685634	99	37	35,1	cyclictest	721474	-21	kworker/2:2+pm	07:55:44	2
685634	99	37	34,2	cyclictest	915526	-21	kworker/2:0+pm	11:45:12	2
685634	99	37	34,2	cyclictest	3724978	-1	kworker/2:1H+kblockd	11:31:25	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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