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
Special All - All RT - Optimization - Ethernet - Thumbnails - Next

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 Fri May 08, 2026 12:44:50)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2919794	99	53	40,9	cyclictest	3013068	-21	idleruntime-cro	11:40:01	2
2919785	99	53	46,4	cyclictest	3030117	-21	grep	12:30:01	0
2919789	99	52	39,9	cyclictest	23	1	ktimers/1	11:50:14	1
2919797	99	50	42,6	cyclictest	3019837	-21	kworker/u8:2+events_unbound	12:05:53	3
2919785	99	49	38,7	cyclictest	3004061	-21	grep	11:10:24	0
2919797	99	47	40,5	cyclictest	3004435	-21	kworker/u8:3+events_unbound	12:10:53	3
2919789	99	47	38,5	cyclictest	3019858	-21	cron	12:00:00	1
2919794	99	46	35,8	cyclictest	31	1	ktimers/2	11:30:11	2
2919785	99	46	12,11	cyclictest	13	1	rcu_preempt	08:00:10	0
2919797	99	45	36,7	cyclictest	2947715	-21	kworker/u8:3+events_unbound	08:30:05	3
2919797	99	44	37,4	cyclictest	3027230	-21	kworker/u8:0+events_unbound	12:31:00	3
2919789	99	44	36,6	cyclictest	2966165	-21	unixbench_singl	09:20:26	1
2919794	99	43	33,7	cyclictest	31	1	ktimers/2	08:30:11	2
2919797	99	42	36,4	cyclictest	2992816	-21	kworker/u8:0+events_unbound	11:00:40	3
2919797	99	42	36,4	cyclictest	2992816	-21	kworker/u8:0+events_unbound	11:00:40	3
2919794	99	42	32,6	cyclictest	2977025	-21	munin-plugin-st	09:55:00	2
2919794	99	42	21,6	cyclictest	0	-21	swapper/2	07:40:02	2
2919789	99	42	35,5	cyclictest	2971376	-21	kworker/u8:3+events_unbound	09:50:21	1
2919789	99	42	35,5	cyclictest	2921353	-21	kworker/u8:3+events_unbound	07:29:58	1
2919789	99	42	35,5	cyclictest	2921353	-21	kworker/u8:3+events_unbound	07:29:58	1
2919797	99	41	34,4	cyclictest	438	-21	cron	12:20:00	3
2919797	99	41	34,4	cyclictest	2987271	-21	munin-plugin-st	10:25:01	3
2919797	99	41	33,6	cyclictest	3012948	-21	kworker/u8:1+events_unbound	11:40:50	3
2919785	99	41	34,4	cyclictest	3032028	-21	idleruntime-cro	12:34:59	0
2919797	99	40	34,4	cyclictest	2962880	-21	kworker/u8:2+events_unbound	09:45:21	3
2919797	99	40	34,4	cyclictest	2962880	-21	kworker/u8:2+events_unbound	09:45:21	3
2919797	99	40	28,8	cyclictest	39	1	ktimers/3	08:00:10	3
2919789	99	40	34,4	cyclictest	2962880	-21	kworker/u8:2+events_unbound	09:25:16	1
2919789	99	40	33,4	cyclictest	2963159	-21	sh	09:15:00	1
2919797	99	39	33,4	cyclictest	2945915	-21	kworker/u8:2+events_unbound	08:50:10	3
2919797	99	39	32,5	cyclictest	2971376	-21	kworker/u8:3+events_unbound	09:56:42	3
2919797	99	39	28,7	cyclictest	2969564	-21	grep	09:30:24	3
2919789	99	39	20,6	cyclictest	13	1	rcu_preempt	07:10:11	1
2919785	99	39	30,6	cyclictest	0	-21	swapper/0	09:45:11	0
2919785	99	39	30,6	cyclictest	0	-21	swapper/0	09:45:11	0
2919797	99	38	31,4	cyclictest	2964884	-21	sendmail	09:20:01	3
2919797	99	38	30,6	cyclictest	2950074	-21	kworker/u8:1+events_unbound	08:48:42	3
2919797	99	38	22,7	cyclictest	13	1	rcu_preempt	09:40:12	3
2919797	99	38	22,7	cyclictest	13	1	rcu_preempt	09:40:11	3
2919785	99	38	19,5	cyclictest	13	1	rcu_preempt	11:35:11	0
2919797	99	37	31,4	cyclictest	3004435	-21	kworker/u8:3+events_unbound	11:20:43	3
2919797	99	37	26,7	cyclictest	2947808	-21	auditctl	08:30:00	3
2919794	99	37	27,7	cyclictest	3015139	-21	fschecks_count	11:45:16	2
2919794	99	37	27,7	cyclictest	0	-21	swapper/2	07:50:24	2
2919794	99	37	27,6	cyclictest	2972964	-21	unixbench_multi	09:40:25	2
2919794	99	37	27,6	cyclictest	2972964	-21	unixbench_multi	09:40:24	2
2919789	99	37	30,5	cyclictest	2976657	-21	kworker/u8:1+events_unbound	10:02:41	1
2919789	99	37	30,4	cyclictest	2988725	-21	unixbench_multi	10:25:23	1
2919789	99	37	27,6	cyclictest	2986812	-21	unixbench_multi	10:20:24	1
2919789	99	37	24,9	cyclictest	23	1	ktimers/1	09:05:13	1
2919797	99	36	28,6	cyclictest	3004435	-21	kworker/u8:3+events_unbound	11:30:49	3
2919794	99	36	11,7	cyclictest	32	-21	ksoftirqd/2	12:05:20	2
2919794	99	36	11,5	cyclictest	32	-21	ksoftirqd/2	07:45:00	2
2919789	99	36	24,7	cyclictest	0	-21	swapper/1	12:10:00	1
2919785	99	36	27,7	cyclictest	2971376	-21	kworker/u8:3+events_unbound	09:40:22	0
2919785	99	36	27,7	cyclictest	2971376	-21	kworker/u8:3+events_unbound	09:40:21	0
2919785	99	36	11,3	cyclictest	13	1	rcu_preempt	11:20:11	0
2919797	99	35	27,6	cyclictest	2980177	-21	kworker/u8:0+events_unbound	10:06:41	3
2919797	99	35	27,4	cyclictest	0	-21	swapper/3	10:45:14	3
2919797	99	35	26,6	cyclictest	0	-21	swapper/3	11:55:00	3
2919797	99	35	24,8	cyclictest	39	1	ktimers/3	09:10:12	3
2919797	99	35	18,5	cyclictest	2950074	-21	kworker/u8:1+events_unbound	08:40:22	3
2919794	99	35	20,9	cyclictest	1	-21	systemd	09:45:21	2
2919794	99	35	20,9	cyclictest	1	-21	systemd	09:45:20	2
2919789	99	35	26,6	cyclictest	2985127	-21	unixbench_singl	10:15:25	1
2919789	99	35	25,6	cyclictest	0	-21	swapper/1	07:25:01	1
2919797	99	34	28,4	cyclictest	3007901	-21	kworker/u8:2+events_unbound	11:25:46	3
2919797	99	34	28,4	cyclictest	2986978	-21	kworker/u8:1+events_unbound	10:55:39	3
2919797	99	34	28,4	cyclictest	2986978	-21	kworker/u8:1+events_unbound	10:55:38	3
2919797	99	34	24,7	cyclictest	3001562	-21	cut	11:05:16	3
2919797	99	34	24,7	cyclictest	3001562	-21	cut	11:05:16	3
2919794	99	34	9,7	cyclictest	0	-21	swapper/2	10:30:24	2
2919794	99	34	25,5	cyclictest	0	-21	swapper/2	11:20:25	2
2919794	99	34	22,8	cyclictest	2981707	-21	grep	10:05:26	2
2919794	99	34	18,11	cyclictest	31	1	ktimers/2	08:55:12	2
2919785	99	34	29,3	cyclictest	2963495	-21	sshd	09:15:15	0
2919785	99	34	27,5	cyclictest	2959621	-21	kworker/u8:0+events_unbound	09:06:40	0
2919785	99	34	27,4	cyclictest	0	-21	swapper/0	09:40:01	0
2919797	99	33	26,5	cyclictest	2926994	-21	kworker/u8:1+events_unbound	07:34:59	3
2919797	99	33	25,5	cyclictest	2988725	-21	tail	10:25:24	3
2919797	99	33	18,5	cyclictest	2899314	-21	kworker/u8:1+events_unbound	07:17:16	3
2919797	99	33	13,12	cyclictest	13	1	rcu_preempt	10:00:25	3
2919794	99	33	25,5	cyclictest	2928371	-21	unixbench_multi	07:30:25	2
2919794	99	33	23,6	cyclictest	3004050	-21	unixbench_multi	11:10:25	2
2919794	99	33	22,7	cyclictest	0	-21	swapper/2	09:35:15	2
2919789	99	33	25,5	cyclictest	3027941	-21	unixbench_multi	12:20:24	1
2919789	99	33	24,6	cyclictest	2937121	-21	unixbench_multi	07:55:24	1
2919789	99	33	23,6	cyclictest	0	-21	swapper/1	09:45:25	1
2919789	99	33	23,6	cyclictest	0	-21	swapper/1	09:45:24	1
2919789	99	33	22,7	cyclictest	0	-21	swapper/1	12:30:00	1
2919785	99	33	26,4	cyclictest	2921353	-21	kworker/u8:3-ext4-rsv-conversion	08:20:01	0
2919785	99	33	26,4	cyclictest	2921353	-21	kworker/u8:3-ext4-rsv-conversion	08:20:00	0
2919785	99	33	24,6	cyclictest	2967000	-21	sshd	09:25:15	0
2919797	99	32	22,4	cyclictest	0	-21	swapper/3	07:40:00	3
2919797	99	32	14,6	cyclictest	40	-21	ksoftirqd/3	09:25:15	3
2919797	99	32	12,12	cyclictest	13	1	rcu_preempt	08:55:18	3
2919794	99	32	9,6	cyclictest	32	-21	ksoftirqd/2	10:25:00	2
2919794	99	32	24,4	cyclictest	0	-21	swapper/2	11:00:25	2
2919794	99	32	24,4	cyclictest	0	-21	swapper/2	11:00:25	2
2919794	99	32	19,7	cyclictest	0	-21	swapper/2	12:20:00	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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