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 08, 2025 12:45:21)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3646434	2	230	177,19	sleep0	0	-21	swapper/0	07:09:46	0
3646259	2	230	199,20	sleep1	0	-21	swapper/1	07:07:30	1
3646063	2	222	193,20	sleep3	0	-21	swapper/3	07:05:36	3
3646400	2	220	189,20	sleep2	0	-21	swapper/2	07:09:20	2
3646627	99	62	56,3	cyclictest	3886038	-21	munin-node	11:45:02	1
3646627	99	59	53,4	cyclictest	3885706	-21	latency_hist	11:45:01	1
3646622	99	58	52,2	cyclictest	3707503	-21	kworker/u8:2+flush-179:0	08:30:14	0
3646622	99	57	51,4	cyclictest	3932861	-21	latency_hist	12:40:01	0
3646622	99	57	47,8	cyclictest	3720677	-21	kworker/u8:4+events_unbound	09:00:05	0
3646622	99	53	44,8	cyclictest	3595740	-21	kworker/u8:1+events_unbound	08:00:23	0
3646622	99	51	47,3	cyclictest	3685763	-21	kworker/u8:4+events_unbound	07:55:14	0
3646622	99	49	41,7	cyclictest	3780626	-21	kworker/u8:0+events_unbound	10:15:25	0
3646635	99	47	42,4	cyclictest	47022	-21	systemd-journal	08:10:02	3
3646635	99	47	42,4	cyclictest	47022	-21	systemd-journal	08:10:01	3
3646630	99	46	0,2	cyclictest	3668132	-31	munin-graph	07:31:59	2
3646622	99	46	43,2	cyclictest	3656494	-21	kworker/u8:0+flush-179:0	07:20:12	0
3646635	99	45	40,4	cyclictest	3716547	-21	munin-update	08:30:03	3
3646635	99	45	32,2	cyclictest	3833504	-21	kworker/u8:1+flush-179:0	11:15:10	3
3646630	99	45	32,2	cyclictest	2880511	-1	kworker/2:1H+kblockd	07:40:25	2
3646630	99	44	38,4	cyclictest	3903215	-21	/usr/share/muni	12:05:05	2
3646622	99	44	40,3	cyclictest	3707503	-21	kworker/u8:2+flush-179:0	08:40:15	0
3646630	99	43	36,6	cyclictest	3876536	-21	kworker/2:2+pm	11:50:00	2
3646635	99	42	38,2	cyclictest	3833842	-21	snmp_ryswitch2.	10:45:02	3
3646635	99	42	37,4	cyclictest	3881608	-21	/usr/share/muni	11:40:15	3
3646630	99	42	38,3	cyclictest	3748763	-21	apt-get	09:05:13	2
3646622	99	42	38,3	cyclictest	3780626	-21	kworker/u8:0+flush-179:0	09:50:05	0
3646622	99	42	34,7	cyclictest	3595740	-21	kworker/u8:1+events_unbound	07:35:14	0
3646635	99	41	36,3	cyclictest	3781087	-21	/usr/share/muni	09:45:01	3
3646630	99	41	38,2	cyclictest	3785244	-21	kworker/2:1+pm	10:10:11	2
3646630	99	41	35,5	cyclictest	1318	-21	snmpd	11:16:16	2
3646630	99	41	34,5	cyclictest	2880511	-1	kworker/2:1H+kblockd	09:15:11	2
3646622	99	41	36,4	cyclictest	3745019	-21	kworker/u8:1+flush-179:0	09:05:16	0
3646635	99	40	37,2	cyclictest	3780626	-21	kworker/u8:0+flush-179:0	10:00:26	3
3646635	99	40	36,3	cyclictest	3720677	-21	kworker/u8:4+flush-179:0	09:00:12	3
3646630	99	40	38,1	cyclictest	3890215	-21	kworker/2:1+pm	11:51:40	2
3646630	99	40	37,2	cyclictest	3591575	-21	kworker/2:0+pm	08:41:26	2
3646630	99	40	37,2	cyclictest	3591575	-21	kworker/2:0+pm	07:45:16	2
3646630	99	40	32,6	cyclictest	3669050	-21	/usr/share/muni	07:35:01	2
3646630	99	40	31,8	cyclictest	2880511	-1	kworker/2:1H+kblockd	11:35:08	2
3646630	99	40	0,2	cyclictest	3694392	-31	munin-graph	08:01:52	2
3646622	99	40	36,3	cyclictest	3707503	-21	kworker/u8:2+flush-179:0	08:50:05	0
3646622	99	40	36,3	cyclictest	3595740	-21	kworker/u8:1+flush-179:0	07:50:15	0
3646622	99	40	32,7	cyclictest	3739815	-21	kworker/u8:0+events_unbound	09:15:14	0
3646622	99	40	32,7	cyclictest	3595740	-21	kworker/u8:1+events_unbound	07:45:23	0
3872747	2	39	0,2	sleep0	3872738	-21	/usr/share/muni	11:30:01	0
3646635	99	39	36,2	cyclictest	3780626	-21	kworker/u8:0+flush-179:0	10:15:28	3
3646630	99	39	37,1	cyclictest	3890215	-21	kworker/2:1+pm	12:16:14	2
3646630	99	39	37,1	cyclictest	3810960	-21	kworker/2:2+pm	10:26:45	2
3646630	99	39	37,1	cyclictest	3785244	-21	kworker/2:1+pm	09:55:10	2
3646630	99	39	36,2	cyclictest	3810960	-21	kworker/2:2+pm	10:51:28	2
3646630	99	39	36,2	cyclictest	3591575	-21	kworker/2:0+pm	09:40:09	2
3646630	99	39	36,2	cyclictest	3591575	-21	kworker/2:0+pm	08:45:31	2
3646630	99	39	35,3	cyclictest	3917272	-21	apt-get	12:20:10	2
3646630	99	39	35,3	cyclictest	3806656	-21	kworker/2:0+pm	10:15:52	2
3646630	99	39	35,3	cyclictest	3591575	-21	kworker/2:0+pm	08:20:03	2
3646627	99	39	35,3	cyclictest	3645250	-21	kworker/u8:3+flush-179:0	07:15:12	1
3646622	99	39	35,3	cyclictest	3664999	-21	cat	07:30:05	0
3646622	99	39	34,3	cyclictest	3846397	-21	kworker/u8:3+events_unbound	12:00:03	0
3646622	99	39	34,2	cyclictest	3846397	-21	kworker/u8:3+flush-179:0	11:40:13	0
3646622	99	39	32,6	cyclictest	3672926	-21	kworker/u8:2+events_unbound	08:05:14	0
3646622	99	39	31,6	cyclictest	3924581	-21	/usr/share/muni	12:30:02	0
3646635	99	38	35,2	cyclictest	3672926	-21	kworker/u8:2+flush-179:0	07:40:15	3
3646635	99	38	34,2	cyclictest	3646188	-1	kworker/3:0H+kblockd	09:05:03	3
3646635	99	38	31,2	cyclictest	3707503	-21	kworker/u8:2+events_unbound	08:50:08	3
3646635	99	38	26,11	cyclictest	3646188	-1	kworker/3:0H+kblockd	09:36:14	3
3646630	99	38	36,1	cyclictest	3890215	-21	kworker/2:1+pm	12:12:26	2
3646630	99	38	36,1	cyclictest	3810960	-21	kworker/2:2+pm	10:56:45	2
3646630	99	38	36,1	cyclictest	3785244	-21	kworker/2:1+pm	10:01:41	2
3646630	99	38	36,1	cyclictest	3591575	-21	kworker/2:0+pm	09:36:44	2
3646630	99	38	36,1	cyclictest	3591575	-21	kworker/2:0+pm	08:10:17	2
3646630	99	38	36,1	cyclictest	3591575	-21	kworker/2:0+pm	08:10:17	2
3646630	99	38	36,1	cyclictest	3591575	-21	kworker/2:0+pm	07:25:19	2
3646630	99	38	36,1	cyclictest	3591575	-21	kworker/2:0+pm	07:25:18	2
3646630	99	38	36,1	cyclictest	3591575	-21	kworker/2:0+pm	07:10:03	2
3646630	99	38	35,2	cyclictest	3890215	-21	kworker/2:1+pm	12:00:05	2
3646630	99	38	35,2	cyclictest	3591575	-21	kworker/2:0+pm	08:06:07	2
3646630	99	38	35,2	cyclictest	2880511	-1	kworker/2:1H+kblockd	11:41:49	2
3646630	99	38	35,1	cyclictest	3846523	-21	kworker/2:0+pm	11:10:03	2
3646630	99	38	34,3	cyclictest	3846523	-21	kworker/2:0+pm	11:30:39	2
3646630	99	38	34,2	cyclictest	3591575	-21	kworker/2:0+pm	09:25:04	2
3646630	99	38	34,2	cyclictest	2880511	-1	kworker/2:1H+kblockd	12:36:32	2
3646630	99	38	33,4	cyclictest	3591575	-21	kworker/2:0+pm	07:51:47	2
3646630	99	38	31,6	cyclictest	2880511	-1	kworker/2:1H+kblockd	09:45:18	2
3646630	99	38	0,2	cyclictest	3867946	-31	munin-graph	11:21:44	2
3646630	99	38	0,2	cyclictest	3867946	-31	munin-graph	11:21:44	2
3646622	99	38	37,1	cyclictest	3704893	-21	kworker/0:1+pm	11:14:59	0
3646622	99	38	36,1	cyclictest	3704893	-21	kworker/0:1+pm	11:45:54	0
3646622	99	38	34,3	cyclictest	3922070	-21	apt-get	12:25:13	0
3646622	99	38	33,3	cyclictest	3767731	-21	kworker/u8:4+events_unbound	09:40:09	0
3646635	99	37	34,2	cyclictest	3924374	-21	kworker/u8:0+events_unbound	12:30:14	3
3646635	99	37	34,2	cyclictest	3646188	-1	kworker/3:0H+kblockd	12:05:02	3
3646635	99	37	34,2	cyclictest	3646188	-1	kworker/3:0H+kblockd	08:25:06	3
3646630	99	37	35,1	cyclictest	3890215	-21	kworker/2:1+pm	12:31:11	2
3646630	99	37	35,1	cyclictest	3846523	-21	kworker/2:0+pm	11:26:34	2
3646630	99	37	35,1	cyclictest	2880511	-1	kworker/2:1H+kblockd	10:06:45	2
3646630	99	37	34,2	cyclictest	3591575	-21	kworker/2:0+pm	07:15:03	2
3646630	99	37	33,2	cyclictest	2880511	-1	kworker/2:1H+kblockd	11:01:14	2
3646630	99	37	31,5	cyclictest	2880511	-1	kworker/2:1H+kblockd	09:31:43	2
3646630	99	37	29,6	cyclictest	1318	-21	snmpd	10:35:03	2
3646630	99	37	25,10	cyclictest	3833732	-21	/usr/share/muni	10:45:02	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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