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 Fri Nov 28, 2025 12:44:44)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3743455	2	242	192,39	sleep3	0	-21	swapper/3	07:07:12	3
3743659	2	225	196,19	sleep0	0	-21	swapper/0	07:09:55	0
3743335	2	222	193,19	sleep1	0	-21	swapper/1	07:06:10	1
3743574	2	220	167,19	sleep2	0	-21	swapper/2	07:08:48	2
3757940	2	127	0,1	sleep2	3757938	-21	snmp_wanswitch.	07:25:02	2
3744074	99	95	39,8	cyclictest	3930133	-21	chrome	10:45:00	0
3744095	99	89	0,88	cyclictest	3826777	-21	chrome	08:45:00	3
3744089	99	88	1,53	cyclictest	3774919	-21	chrome	07:45:01	2
3744095	99	82	26,11	cyclictest	3930182	-21	ThreadPoolForeg	10:45:00	3
3744089	99	54	54,0	cyclictest	4008348	-21	awk	12:15:06	2
3744085	99	53	8,44	cyclictest	29	-21	ksoftirqd/1	11:55:07	1
3744089	99	51	48,2	cyclictest	3826816	-21	/usr/share/muni	08:45:01	2
3744074	99	51	48,2	cyclictest	3891020	-21	kworker/u8:3+events_unbound	11:55:06	0
3744095	99	49	45,3	cyclictest	3891020	-21	kworker/u8:3+flush-179:0	12:05:13	3
3744095	99	49	45,3	cyclictest	3774704	-21	kworker/u8:2+flush-179:0	08:50:15	3
3744089	99	48	42,3	cyclictest	3787525	-21	kworker/u8:1+flush-179:0	08:15:05	2
3744095	99	47	44,2	cyclictest	3851946	-21	kworker/u8:3+events_unbound	09:20:14	3
3744095	99	46	39,3	cyclictest	3774704	-21	kworker/u8:2+flush-179:0	08:20:15	3
3744074	99	46	43,2	cyclictest	3916881	-21	kworker/u8:2+events_unbound	10:35:06	0
3744074	99	46	43,2	cyclictest	3916881	-21	kworker/u8:2+events_unbound	10:35:05	0
3744074	99	46	42,3	cyclictest	3761739	-21	kworker/u8:0+events_unbound	07:45:00	0
3744085	99	45	40,3	cyclictest	3869139	-21	kworker/u8:0+flush-179:0	10:25:13	1
3744074	99	45	42,2	cyclictest	3899210	-21	kworker/u8:1+events_unbound	10:55:01	0
3744089	99	44	41,2	cyclictest	3996736	-21	kworker/u8:1+flush-179:0	12:05:05	2
3744089	99	44	39,3	cyclictest	3983782	-21	apt-get	11:45:16	2
3744089	99	43	37,5	cyclictest	4028019	-31	munin-html	12:35:32	2
3744074	99	43	40,3	cyclictest	3757337	-21	kworker/u8:3+flush-179:0	08:05:06	0
3744074	99	43	40,2	cyclictest	3774704	-21	kworker/u8:2+flush-179:0	09:30:14	0
3744089	99	42	36,4	cyclictest	3869940	-21	ntpq	09:35:04	2
3744085	99	42	39,2	cyclictest	3805316	-1	kworker/1:1H+kblockd	08:55:56	1
3744074	99	42	39,2	cyclictest	4006790	-21	kworker/u8:0+flush-179:0	12:35:25	0
3744074	99	42	39,2	cyclictest	3869139	-21	kworker/u8:0+events_unbound	10:00:07	0
3744095	99	41	40,1	cyclictest	43	1	rcuc/3	07:30:06	3
3744095	99	41	37,3	cyclictest	3869139	-21	kworker/u8:0+events_unbound	10:25:15	3
3744074	99	41	40,0	cyclictest	4018887	-21	awk	12:25:15	0
3744095	99	40	35,4	cyclictest	3891020	-21	kworker/u8:3+flush-179:0	11:10:05	3
3744095	99	40	33,5	cyclictest	4007306	-21	/usr/share/muni	12:15:02	3
3744089	99	40	38,1	cyclictest	3869430	-21	kworker/2:0+pm	09:42:33	2
3744089	99	40	37,2	cyclictest	3869139	-21	kworker/u8:0+events_unbound	10:15:15	2
3744089	99	40	35,3	cyclictest	3896166	-21	kworker/2:1+pm	10:55:03	2
3744095	99	39	35,2	cyclictest	3743719	-21	kworker/u8:1+events_unbound	07:20:13	3
3744089	99	39	37,1	cyclictest	3896166	-21	kworker/2:1+pm	10:31:47	2
3744089	99	39	37,1	cyclictest	3869430	-21	kworker/2:0+pm	10:01:21	2
3744089	99	39	37,1	cyclictest	3804733	-21	kworker/2:2+pm	09:06:02	2
3744089	99	39	37,1	cyclictest	3646315	-21	kworker/2:2+pm	07:15:52	2
3744089	99	39	36,2	cyclictest	3964160	-21	kworker/2:0+pm	11:56:02	2
3744089	99	39	36,2	cyclictest	3964160	-21	kworker/2:0+pm	11:40:25	2
3744089	99	39	36,2	cyclictest	3964160	-21	kworker/2:0+pm	11:36:23	2
3744089	99	39	36,2	cyclictest	3896166	-21	kworker/2:1+pm	10:10:03	2
3744089	99	39	36,2	cyclictest	3761842	-21	kworker/2:1+pm	07:51:14	2
3744089	99	39	36,2	cyclictest	3757337	-21	kworker/u8:3+flush-179:0	08:10:05	2
3744085	99	39	34,4	cyclictest	3762448	-21	ntpq	07:30:03	1
3744085	99	39	33,4	cyclictest	3981629	-21	CacheThread_Blo	11:45:01	1
3744085	99	39	33,3	cyclictest	3805316	-1	kworker/1:1H+kblockd	10:40:01	1
3744074	99	39	37,2	cyclictest	3891020	-21	kworker/u8:3+flush-179:0	10:20:15	0
3744074	99	39	36,2	cyclictest	3991511	-21	kworker/u8:2+flush-179:0	12:05:24	0
3744074	99	39	36,2	cyclictest	3977066	-21	kworker/u8:2+events_unbound	11:45:00	0
3744074	99	39	36,2	cyclictest	3669978	-21	kworker/u8:0+flush-179:0	07:15:06	0
3744089	99	38	37,1	cyclictest	3804733	-21	kworker/2:2+pm	09:01:07	2
3744089	99	38	37,1	cyclictest	3804733	-21	kworker/2:2+pm	08:31:27	2
3744089	99	38	36,1	cyclictest	3964160	-21	kworker/2:0+pm	12:20:51	2
3744089	99	38	36,1	cyclictest	3964160	-21	kworker/2:0+pm	12:20:51	2
3744089	99	38	36,1	cyclictest	3896166	-21	kworker/2:1+pm	10:51:31	2
3744089	99	38	36,1	cyclictest	3896166	-21	kworker/2:1+pm	10:35:16	2
3744089	99	38	36,1	cyclictest	3896166	-21	kworker/2:1+pm	10:35:16	2
3744089	99	38	36,1	cyclictest	3869430	-21	kworker/2:0+pm	10:05:41	2
3744089	99	38	36,1	cyclictest	3830934	-21	kworker/2:0+pm	08:50:01	2
3744089	99	38	36,1	cyclictest	3804733	-21	kworker/2:2+pm	09:10:16	2
3744089	99	38	36,1	cyclictest	3804733	-21	kworker/2:2+pm	08:26:13	2
3744089	99	38	36,1	cyclictest	3761842	-21	kworker/2:1+pm	08:02:12	2
3744089	99	38	36,1	cyclictest	3646315	-21	kworker/2:2+pm	07:20:32	2
3744089	99	38	35,2	cyclictest	3964160	-21	kworker/2:0+pm	11:25:18	2
3744089	99	38	35,2	cyclictest	3951188	-21	kworker/2:0+pm	11:10:03	2
3744089	99	38	35,2	cyclictest	3739218	-21	kworker/u8:3+flush-179:0	07:14:59	2
3744074	99	38	35,2	cyclictest	4006790	-21	kworker/u8:0+flush-179:0	12:20:26	0
3744074	99	38	35,2	cyclictest	4006790	-21	kworker/u8:0+flush-179:0	12:20:26	0
3744074	99	38	35,2	cyclictest	3669978	-21	kworker/u8:0+events_unbound	07:10:06	0
3744074	99	38	35,2	cyclictest	3624376	-1	kworker/0:1H+kblockd	09:04:36	0
3744074	99	38	0,37	cyclictest	1	-21	systemd	09:39:59	0
3744095	99	37	35,1	cyclictest	3555557	-1	kworker/3:1H+kblockd	08:36:41	3
3744095	99	37	34,3	cyclictest	3869139	-21	kworker/u8:0+flush-179:0	10:00:26	3
3744095	99	37	34,2	cyclictest	3991511	-21	kworker/u8:2+flush-179:0	11:55:14	3
3744095	99	37	34,2	cyclictest	3959879	-21	kworker/u8:0+events_unbound	11:25:13	3
3744095	99	37	34,2	cyclictest	3916881	-21	kworker/u8:2+flush-179:0	10:30:15	3
3744095	99	37	33,2	cyclictest	3555557	-1	kworker/3:1H+kblockd	07:36:03	3
3744089	99	37	36,1	cyclictest	3964160	-21	kworker/2:0+pm	12:10:47	2
3744089	99	37	36,1	cyclictest	3804733	-21	kworker/2:2+pm	08:35:12	2
3744089	99	37	35,1	cyclictest	3896166	-21	kworker/2:1+pm	10:25:26	2
3744089	99	37	35,1	cyclictest	3804733	-21	kworker/2:2+pm	09:31:08	2
3744089	99	37	35,1	cyclictest	3646315	-21	kworker/2:2+pm	07:32:05	2
3744089	99	37	34,2	cyclictest	3804733	-21	kworker/2:2+pm	08:40:04	2
3744089	99	37	33,3	cyclictest	3761739	-21	kworker/u8:0+flush-179:0	07:40:10	2
3744085	99	37	34,2	cyclictest	3805316	-1	kworker/1:1H+kblockd	09:32:13	1
3744085	99	37	34,2	cyclictest	3556031	-1	kworker/1:2H+kblockd	08:10:03	1
3744085	99	37	34,2	cyclictest	3556031	-1	kworker/1:2H+kblockd	08:02:08	1
3744085	99	37	34,2	cyclictest	3556031	-1	kworker/1:2H+kblockd	07:20:26	1
3744085	99	37	29,6	cyclictest	3887172	-21	ntpq	09:55:04	1
3744074	99	37	34,2	cyclictest	3787525	-21	kworker/u8:1+flush-179:0	08:45:06	0
3744074	99	37	34,2	cyclictest	3624376	-1	kworker/0:1H+kblockd	09:15:12	0
3744074	99	37	34,2	cyclictest	3624376	-1	kworker/0:1H+kblockd	08:34:46	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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