OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #0, 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.
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 rack0slot2.osadl.org (updated Tue Jul 14, 2026 12:43:29)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3257089	2	57	46,8	sleep5	0	-21	swapper/5	07:08:09	5
3256928	2	55	20,30	sleep7	0	-21	swapper/7	07:05:54	7
3256946	2	39	29,7	sleep6	0	-21	swapper/6	07:06:09	6
3257508	99	33	31,1	cyclictest	0	-21	swapper/7	11:29:57	7
3257499	99	32	29,2	cyclictest	3915170	-21	kworker/u16:2+events_unbound	12:05:11	4
3257502	99	31	29,2	cyclictest	3416929	-21	kworker/u16:2+flush-8:0	08:40:13	5
3257502	99	31	29,2	cyclictest	3416929	-21	kworker/u16:2+flush-8:0	08:40:13	5
3257502	99	28	26,2	cyclictest	3358725	-21	kworker/u16:0+flush-8:0	08:15:27	5
3256296	2	28	15,8	sleep4	0	-21	swapper/4	07:05:27	4
3398285	2	27	0,1	chrt	3398284	-21	gltestperf	08:20:10	4
3257499	99	27	24,2	cyclictest	3689881	-21	kworker/u16:2+events_unbound	11:00:11	4
3529994	2	26	0,0	chrt	3529992	-21	sh	09:22:23	7
3257504	99	26	24,2	cyclictest	3766558	-21	kworker/u16:0+events_unbound	11:20:12	6
3257502	99	26	24,2	cyclictest	3766558	-21	kworker/u16:0+flush-8:0	11:40:21	5
3257502	99	26	22,3	cyclictest	3518272	-21	packagekitd	09:18:49	5
3257502	99	25	23,2	cyclictest	3209246	-21	kworker/u16:0+flush-8:0	07:30:10	5
3257504	99	24	22,2	cyclictest	3267071	-21	kworker/u16:1+flush-8:0	08:29:52	6
3257504	99	24	20,3	cyclictest	3754062	-21	latency_hist	10:54:57	6
3257504	99	24	20,3	cyclictest	3754062	-21	latency_hist	10:54:57	6
3257502	99	24	22,2	cyclictest	3689881	-21	kworker/u16:2+events_unbound	11:10:26	5
3257502	99	24	22,2	cyclictest	3581353	-21	kworker/u16:1+flush-8:0	10:00:10	5
3257502	99	24	22,2	cyclictest	3531846	-21	kworker/u16:2+events_unbound	10:10:11	5
3257502	99	24	22,2	cyclictest	3291478	-21	kworker/u16:2+flush-8:0	07:55:25	5
3257502	99	23	21,2	cyclictest	3839921	-21	kworker/u16:1+events_unbound	11:35:27	5
3257502	99	23	21,2	cyclictest	3839921	-21	kworker/u16:1+events_unbound	11:30:12	5
3257504	99	22	20,2	cyclictest	3890123	-21	kworker/u16:4+events_unbound	11:55:21	6
3257504	99	22	20,2	cyclictest	3655489	-21	kworker/u16:1+events_unbound	10:35:19	6
3257504	99	22	20,2	cyclictest	3333263	-21	kworker/u16:3+flush-8:0	07:49:52	6
3257502	99	22	20,2	cyclictest	3717165	-21	kworker/u16:3+events_unbound	10:45:25	5
3257502	99	22	20,2	cyclictest	3518386	-21	kworker/u16:6+flush-8:0	10:25:12	5
3257502	99	22	20,2	cyclictest	3333263	-21	kworker/u16:3+events_unbound	08:55:12	5
3257502	99	22	20,2	cyclictest	3333263	-21	kworker/u16:3+events_unbound	08:25:12	5
3257502	99	22	20,2	cyclictest	3291478	-21	kworker/u16:2+flush-8:0	07:25:26	5
3257502	99	22	18,3	cyclictest	3939424	-21	cat	12:09:51	5
3257504	99	21	18,2	cyclictest	3291478	-21	kworker/u16:2+events_unbound	07:30:11	6
3257504	99	21	17,3	cyclictest	3791196	-21	cat	11:09:57	6
3257502	99	21	19,2	cyclictest	3915170	-21	kworker/u16:2+flush-8:0	12:15:17	5
3257502	99	21	19,2	cyclictest	3890123	-21	kworker/u16:4+flush-8:0	11:50:12	5
3257502	99	21	19,2	cyclictest	3689881	-21	kworker/u16:2+events_unbound	11:20:03	5
3257502	99	21	19,2	cyclictest	3358725	-21	kworker/u16:0+flush-8:0	08:20:20	5
3257508	99	20	0,18	cyclictest	3976651	-21	sh	12:24:56	7
3257504	99	20	18,2	cyclictest	3886949	-21	kworker/u16:1+events_unbound	12:39:51	6
3257504	99	20	18,2	cyclictest	3839921	-21	kworker/u16:1+events_unbound	11:35:17	6
3257502	99	20	18,2	cyclictest	3886949	-21	kworker/u16:1+events_unbound	12:29:51	5
3257502	99	20	18,2	cyclictest	3518386	-21	kworker/u16:6+events_unbound	10:20:26	5
3257499	99	20	16,3	cyclictest	3964241	-21	awk	12:19:56	4
3257508	99	19	0,17	cyclictest	1302	-21	snmpd	11:44:17	7
3257504	99	19	16,2	cyclictest	3886949	-21	kworker/u16:1+flush-8:0	12:25:02	6
3257504	99	19	16,2	cyclictest	3516493	-21	kworker/u16:0+events_unbound	09:25:00	6
3257502	99	19	17,2	cyclictest	3890123	-21	kworker/u16:4+flush-8:0	12:30:25	5
3257502	99	19	17,2	cyclictest	3890123	-21	kworker/u16:4+events_unbound	12:35:15	5
3257502	99	19	17,2	cyclictest	3531846	-21	kworker/u16:2+flush-8:0	10:05:07	5
3257502	99	19	17,2	cyclictest	3518386	-21	kworker/u16:6+flush-8:0	09:30:23	5
3257502	99	19	17,2	cyclictest	3518384	-21	kworker/u16:4+flush-8:0	09:36:27	5
3257502	99	19	17,2	cyclictest	3518384	-21	kworker/u16:4+flush-8:0	09:25:28	5
3257502	99	19	15,3	cyclictest	3890000	-21	latency_hist	11:49:57	5
3257499	99	19	15,3	cyclictest	3580991	-21	latency_hist	09:44:57	4
3716407	2	18	0,1	sleep4	0	-21	swapper/4	10:39:05	4
3257508	99	18	0,17	cyclictest	0	-21	swapper/7	09:18:56	7
3257502	99	18	16,2	cyclictest	3689881	-21	kworker/u16:2+flush-8:0	11:00:19	5
3257502	99	18	16,2	cyclictest	3358725	-21	kworker/u16:0+events_unbound	08:05:12	5
3257502	99	18	15,2	cyclictest	3518386	-21	kworker/u16:6+flush-8:0	09:45:03	5
3257499	99	18	14,3	cyclictest	3494233	-21	latency_hist	09:09:57	4
3257499	99	18	13,4	cyclictest	3518272	-21	packagekitd	09:19:09	4
3257508	99	17	16,0	cyclictest	0	-21	swapper/7	10:56:03	7
3257508	99	17	16,0	cyclictest	0	-21	swapper/7	10:56:03	7
3257508	99	17	14,2	cyclictest	3939478	-21	turbostat	12:09:56	7
3257508	99	17	13,3	cyclictest	1302	-21	snmpd	08:38:22	7
3257508	99	17	13,3	cyclictest	1302	-21	snmpd	07:59:54	7
3257508	99	17	0,11	cyclictest	0	-21	swapper/7	12:10:21	7
3257504	99	17	15,2	cyclictest	3518384	-21	kworker/u16:4+flush-8:0	09:40:21	6
3257504	99	17	0,3	cyclictest	3966659	-21	kthreadcore	12:20:15	6
3257502	99	17	15,2	cyclictest	3689881	-21	kworker/u16:2+events_unbound	10:54:48	5
3257502	99	17	15,2	cyclictest	3689881	-21	kworker/u16:2+events_unbound	10:54:48	5
3257502	99	17	15,2	cyclictest	3358725	-21	kworker/u16:0+flush-8:0	08:00:15	5
3257502	99	17	15,2	cyclictest	3209246	-21	kworker/u16:0+flush-8:0	07:15:03	5
3257499	99	17	12,4	cyclictest	3877648	-21	awk	11:44:57	4
3815643	2	16	0,1	sleep5	74	1	rcuc/5	11:19:37	5
3257508	99	16	7,8	cyclictest	5861	-21	gmain	12:30:18	7
3257508	99	16	12,3	cyclictest	1302	-21	snmpd	12:03:12	7
3257508	99	16	0,1	cyclictest	0	-21	swapper/7	10:40:22	7
3257508	99	16	0,1	cyclictest	0	-21	swapper/7	07:25:23	7
3257508	99	16	0,14	cyclictest	0	-21	swapper/7	11:35:22	7
3257508	99	16	0,14	cyclictest	0	-21	swapper/7	07:45:24	7
3257504	99	16	14,2	cyclictest	3890123	-21	kworker/u16:4+events_unbound	12:10:14	6
3257504	99	16	14,2	cyclictest	3267071	-21	kworker/u16:1+events_unbound	08:15:12	6
3257504	99	16	13,2	cyclictest	3267071	-21	kworker/u16:1+flush-8:0	08:40:23	6
3257504	99	16	13,2	cyclictest	3267071	-21	kworker/u16:1+flush-8:0	08:40:23	6
3257502	99	16	15,1	cyclictest	0	-21	swapper/5	07:35:21	5
3257502	99	16	14,2	cyclictest	3890123	-21	kworker/u16:4+events_unbound	12:02:27	5
3257502	99	16	14,2	cyclictest	3741857	-21	kworker/u16:4+events_unbound	10:55:33	5
3257502	99	16	14,2	cyclictest	3741857	-21	kworker/u16:4+events_unbound	10:55:33	5
3257502	99	16	14,2	cyclictest	3689881	-21	kworker/u16:2+events_unbound	10:39:59	5
3257502	99	16	14,2	cyclictest	3655489	-21	kworker/u16:1+events_unbound	10:17:48	5
3257502	99	16	14,2	cyclictest	3630765	-21	kworker/u16:0+flush-8:0	10:35:49	5
3257502	99	16	14,2	cyclictest	3518384	-21	kworker/u16:4+flush-8:0	09:50:37	5
3257502	99	16	14,2	cyclictest	3333263	-21	kworker/u16:3+events_unbound	09:13:38	5
3257502	99	16	14,2	cyclictest	3209246	-21	kworker/u16:0+events_unbound	07:10:04	5
3257502	99	16	12,2	cyclictest	3886949	-21	kworker/u16:1+events_unbound	11:55:31	5
3257502	99	16	12,2	cyclictest	3516493	-21	kworker/u16:0+events_unbound	09:21:45	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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