OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #5

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8
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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 rackbslot5s.osadl.org (updated Thu Jun 11, 2026 12:44:47)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1193512	99	49	43,4	cyclictest	1254072	-21	kworker/u8:1+events_unbound	10:10:45	0
1193524	99	48	34,10	cyclictest	39	1	ktimers/3	09:25:12	3
1193512	99	48	40,4	cyclictest	1276568	-21	munin-plugin-st	11:10:00	0
1193512	99	48	40,4	cyclictest	1276568	-21	munin-plugin-st	11:10:00	0
1193512	99	46	32,5	cyclictest	1283273	-21	kworker/u8:1+events_unbound	11:40:56	0
1193524	99	45	34,8	cyclictest	39	1	ktimers/3	09:35:12	3
1193516	99	45	35,7	cyclictest	1276566	-21	munin-plugin-st	11:10:01	1
1193516	99	45	35,7	cyclictest	1276566	-21	munin-plugin-st	11:10:00	1
1193512	99	45	34,8	cyclictest	1232001	-21	apt-key	09:00:01	0
1193512	99	44	33,7	cyclictest	1212400	-21	grep	08:00:26	0
1193524	99	43	36,5	cyclictest	1212678	-21	kworker/u8:0+events_unbound	08:15:25	3
1193521	99	43	36,4	cyclictest	1300645	-21	munin-plugin-st	12:19:59	2
1193521	99	43	34,5	cyclictest	1	-21	systemd	08:00:16	2
1193521	99	42	33,6	cyclictest	1221085	-21	unixbench_multi	08:25:25	2
1193512	99	42	36,4	cyclictest	1178662	-21	kworker/u8:1+events_unbound	07:10:02	0
1193516	99	41	32,4	cyclictest	0	-21	swapper/1	11:55:57	1
1193512	99	41	35,4	cyclictest	1257508	-21	kworker/u8:3+events_unbound	10:20:45	0
1193524	99	40	29,4	cyclictest	1214448	-21	kworker/u8:1+events_unbound	08:10:21	3
1193524	99	40	29,4	cyclictest	1214448	-21	kworker/u8:1+events_unbound	08:10:21	3
1193521	99	40	21,10	cyclictest	1250580	-21	kworker/u8:0+events_unbound	10:45:13	2
1193512	99	40	22,4	cyclictest	13	1	rcu_preempt	12:10:00	0
1193524	99	39	30,6	cyclictest	1231767	-21	cron	09:00:00	3
1193524	99	39	25,10	cyclictest	39	1	ktimers/3	08:25:12	3
1193521	99	39	30,6	cyclictest	1216214	-21	auditctl	08:15:01	2
1193521	99	39	30,6	cyclictest	1216214	-21	auditctl	08:15:00	2
1193521	99	39	28,7	cyclictest	0	-21	swapper/2	10:30:24	2
1193512	99	39	8,24	cyclictest	11	-21	ksoftirqd/0	10:05:01	0
1193512	99	39	32,5	cyclictest	1283273	-21	kworker/u8:1+events_unbound	11:35:56	0
1193512	99	39	21,5	cyclictest	13	1	rcu_preempt	07:50:01	0
1193521	99	38	28,7	cyclictest	1271434	-21	auditctl	10:55:00	2
1193521	99	38	28,6	cyclictest	0	-21	swapper/2	12:30:26	2
1193521	99	38	27,7	cyclictest	1304067	-21	grep	12:30:00	2
1193516	99	38	29,5	cyclictest	1210635	-21	unixbench_multi	07:55:25	1
1193516	99	38	28,6	cyclictest	0	-21	swapper/1	10:40:01	1
1193512	99	38	31,4	cyclictest	1266322	-21	sendmail	10:40:00	0
1193524	99	37	29,4	cyclictest	0	-21	swapper/3	08:05:19	3
1193524	99	37	29,4	cyclictest	0	-21	swapper/3	08:05:19	3
1193524	99	37	29,4	cyclictest	0	-21	swapper/3	08:00:16	3
1193521	99	37	31,4	cyclictest	1250580	-21	kworker/u8:0+events_unbound	09:54:42	2
1193512	99	37	31,4	cyclictest	1220634	-21	kworker/u8:1+events_unbound	08:40:31	0
1193524	99	36	26,6	cyclictest	0	-21	swapper/3	11:50:24	3
1193524	99	36	25,7	cyclictest	1233226	-21	grep	09:00:27	3
1193521	99	36	28,5	cyclictest	1288069	-21	unixbench_singl	11:40:24	2
1193521	99	36	27,5	cyclictest	0	-21	swapper/2	10:25:25	2
1193521	99	36	25,7	cyclictest	1291128	-21	missed_timers	11:50:19	2
1193521	99	36	18,5	cyclictest	1285013	-21	kworker/u8:2+events_unbound	11:46:23	2
1193516	99	36	27,5	cyclictest	0	-21	swapper/1	07:15:03	1
1193512	99	36	29,5	cyclictest	1178662	-21	kworker/u8:1+events_unbound	07:20:05	0
1193512	99	36	28,6	cyclictest	1233356	-21	kworker/u8:1+events_unbound	09:02:42	0
1193512	99	36	22,5	cyclictest	13	1	rcu_preempt	09:10:07	0
1193512	99	36	19,9	cyclictest	13	1	rcu_preempt	10:58:06	0
1193512	99	36	13,13	cyclictest	1231427	-1	kworker/0:1H+kblockd	11:20:00	0
1193521	99	35	28,3	cyclictest	0	-21	swapper/2	10:10:15	2
1193521	99	35	27,4	cyclictest	0	-21	swapper/2	11:05:00	2
1193521	99	35	17,4	cyclictest	13	1	rcu_preempt	11:55:10	2
1193516	99	35	28,4	cyclictest	1195143	-21	auditctl	07:15:01	1
1193516	99	35	27,4	cyclictest	0	-21	swapper/1	07:30:01	1
1193516	99	35	24,7	cyclictest	0	-21	swapper/1	08:55:25	1
1193512	99	35	27,6	cyclictest	1212678	-21	kworker/u8:0+events_unbound	08:06:41	0
1193512	99	35	27,6	cyclictest	1212678	-21	kworker/u8:0+events_unbound	08:06:41	0
1193512	99	35	19,5	cyclictest	13	1	rcu_preempt	11:20:24	0
1193512	99	35	18,5	cyclictest	13	1	rcu_preempt	08:35:13	0
1193512	99	35	15,10	cyclictest	13	1	rcu_preempt	10:30:01	0
1193512	99	35	13,5	cyclictest	13	1	rcu_preempt	07:25:24	0
1193524	99	34	27,4	cyclictest	1297235	-21	apt	12:10:00	3
1193524	99	34	22,7	cyclictest	0	-21	swapper/3	12:00:00	3
1193521	99	34	25,6	cyclictest	1204086	-21	kworker/u8:0+events_unbound	07:38:41	2
1193521	99	34	25,6	cyclictest	0	-21	swapper/2	08:55:25	2
1193521	99	34	25,5	cyclictest	0	-21	swapper/2	10:25:00	2
1193521	99	34	19,5	cyclictest	1242103	-21	kworker/u8:1+events_unbound	09:32:02	2
1193516	99	34	26,4	cyclictest	0	-21	swapper/1	09:00:27	1
1193516	99	34	25,4	cyclictest	0	-21	swapper/1	11:00:27	1
1193512	99	34	28,4	cyclictest	1291901	-21	kworker/u8:2+events_unbound	12:00:58	0
1193512	99	34	28,4	cyclictest	1291901	-21	kworker/u8:2+events_unbound	12:00:58	0
1193512	99	34	18,3	cyclictest	13	1	rcu_preempt	12:15:00	0
1193512	99	34	16,6	cyclictest	13	1	rcu_preempt	11:10:23	0
1193512	99	34	16,4	cyclictest	13	1	rcu_preempt	07:30:15	0
1193524	99	33	26,4	cyclictest	0	-21	swapper/3	08:25:00	3
1193524	99	33	25,4	cyclictest	0	-21	swapper/3	09:55:14	3
1193521	99	33	3,4	cyclictest	13	1	rcu_preempt	12:10:13	2
1193521	99	33	25,4	cyclictest	0	-21	swapper/2	09:10:25	2
1193521	99	33	25,4	cyclictest	0	-21	swapper/2	08:10:00	2
1193521	99	33	25,4	cyclictest	0	-21	swapper/2	08:10:00	2
1193521	99	33	23,6	cyclictest	0	-21	swapper/2	09:20:24	2
1193516	99	33	21,8	cyclictest	1240060	-21	grep	09:20:24	1
1193512	99	33	6,3	cyclictest	13	1	rcu_preempt	12:35:19	0
1193512	99	33	23,6	cyclictest	0	-21	swapper/0	09:25:37	0
1193524	99	32	23,7	cyclictest	1237333	-21	kworker/u8:1+events_unbound	09:20:38	3
1193521	99	32	9,3	cyclictest	13	1	rcu_preempt	07:20:11	2
1193521	99	32	26,3	cyclictest	1286801	-21	sendmail	11:40:00	2
1193521	99	32	23,4	cyclictest	0	-21	swapper/2	08:15:26	2
1193521	99	32	1,10	cyclictest	1195229	-21	cp	07:15:01	2
1193512	99	32	25,4	cyclictest	1293818	-21	kthreadd	12:00:00	0
1193512	99	32	16,5	cyclictest	13	1	rcu_preempt	12:25:23	0
1193512	99	32	16,5	cyclictest	13	1	rcu_preempt	10:20:01	0
1193512	99	32	11,11	cyclictest	0	-21	swapper/0	10:05:02	0
1193512	99	32	0,16	cyclictest	438	-21	cron	09:40:00	0
1193524	99	31	24,3	cyclictest	0	-21	swapper/3	10:45:24	3
1193524	99	31	23,5	cyclictest	1278628	-21	fschecks_count	11:15:15	3
1193524	99	31	23,4	cyclictest	0	-21	swapper/3	10:00:26	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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