OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

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.
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 rack0slot4s.osadl.org (updated Sat Jul 18, 2026 00:45:11)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
395828	2	58	0,0	sleep4	0	-21	swapper/4	21:48:25	10
243709	99	57	56,1	cyclictest	618598	-21	thunderbird	19:55:31	9
243709	99	57	56,1	cyclictest	618598	-21	thunderbird	19:55:30	9
243300	2	55	53,1	sleep12	0	-21	swapper/12	19:09:54	4
243732	99	53	52,1	cyclictest	205536	-1	kworker/u33:0+i915_flip	19:55:31	3
243732	99	53	52,1	cyclictest	205536	-1	kworker/u33:0+i915_flip	19:55:30	3
243746	99	52	50,1	cyclictest	205536	-1	kworker/u33:0+i915_flip	21:15:45	7
243741	99	47	34,0	cyclictest	0	-21	swapper/14	21:56:19	6
243700	99	46	43,2	cyclictest	541891	-21	kworker/u32:1+flush-259:0	00:00:14	0
243739	99	44	41,3	cyclictest	516433	-21	kworker/u32:4+events_unbound	00:05:18	5
4189	98	42	0,41	rtkit-daemon	0	-21	swapper/2	19:05:40	8
243707	99	42	9,31	cyclictest	394749	-21	kworker/u32:1+events_unbound	22:22:58	8
243732	99	41	39,2	cyclictest	516433	-21	kworker/u32:4+events_unbound	23:57:57	3
243709	99	41	39,1	cyclictest	516433	-21	kworker/u32:4+events_unbound	23:50:15	9
243140	2	41	39,1	sleep5	0	-21	swapper/5	19:07:54	11
243732	99	39	38,1	cyclictest	594288	-21	kworker/u32:4+events_unbound	00:35:15	3
243709	99	39	39,0	cyclictest	0	-21	swapper/3	23:43:50	9
243042	2	39	37,1	sleep8	0	-21	swapper/8	19:06:54	14
243741	99	38	0,27	cyclictest	491460	-21	ssh	23:02:13	6
243040	2	38	35,2	sleep7	0	-21	swapper/7	19:06:52	13
243741	99	37	24,1	cyclictest	618598	-21	thunderbird	20:50:24	6
243739	99	37	36,1	cyclictest	529801	-21	kworker/u32:0+flush-259:0	23:40:17	5
243725	99	37	37,0	cyclictest	0	-21	swapper/8	20:02:33	14
243725	99	37	35,2	cyclictest	567555	-21	kworker/u32:0+events_unbound	00:10:18	14
243060	2	37	35,1	sleep4	0	-21	swapper/4	19:07:05	10
242937	2	37	35,1	sleep11	0	-21	swapper/11	19:05:52	3
243741	99	36	7,11	cyclictest	0	-21	swapper/14	00:19:05	6
243741	99	36	0,0	cyclictest	0	-21	swapper/14	20:40:14	6
243732	99	36	35,1	cyclictest	238937	-1	kworker/u33:2+i915_flip	23:43:51	3
242985	2	36	34,1	sleep6	0	-21	swapper/6	19:06:19	12
243741	99	35	0,24	cyclictest	0	-21	swapper/14	20:39:26	6
243739	99	35	33,2	cyclictest	0	-21	swapper/13	20:01:28	5
243709	99	35	33,2	cyclictest	422299	-21	kworker/u32:0+events_unbound	22:20:16	9
243276	2	35	32,2	sleep9	0	-21	swapper/9	19:09:35	15
243176	2	35	32,2	sleep14	0	-21	swapper/14	19:08:20	6
243027	2	35	32,2	sleep15	0	-21	swapper/15	19:06:45	7
242936	2	35	32,2	sleep10	0	-21	swapper/10	19:05:51	2
243739	99	34	33,1	cyclictest	567555	-21	kworker/u32:0+events_unbound	00:25:16	5
243725	99	34	33,1	cyclictest	541891	-21	kworker/u32:1+flush-259:0	23:50:13	14
242975	2	34	32,1	sleep1	0	-21	swapper/1	19:06:14	1
243739	99	33	30,2	cyclictest	0	-21	swapper/13	20:17:50	5
243739	99	33	0,30	cyclictest	286439	-21	kworker/13:1+i915-unordered	20:55:16	5
243732	99	33	32,1	cyclictest	509959	-21	kworker/u32:1+events_unbound	23:25:23	3
243732	99	33	31,2	cyclictest	541891	-21	kworker/u32:1+events_unbound	00:15:17	3
243725	99	33	32,1	cyclictest	414722	-21	kworker/u32:4+flush-259:0	22:55:16	14
243725	99	33	31,2	cyclictest	516433	-21	kworker/u32:4+flush-259:0	23:25:16	14
243725	99	33	31,1	cyclictest	238937	-1	kworker/u33:2+i915_flip	20:54:14	14
243709	99	33	31,2	cyclictest	256756	-21	kworker/u32:5+flush-259:0	19:30:23	9
243707	99	33	23,9	cyclictest	618598	-21	thunderbird	19:10:16	8
243700	99	33	33,0	cyclictest	0	-21	swapper/0	00:37:33	0
243700	99	33	32,1	cyclictest	205536	-1	kworker/u33:0+i915_flip	20:02:32	0
243093	2	33	31,1	sleep3	0	-21	swapper/3	19:07:20	9
243741	99	32	28,4	cyclictest	1774	-21	snmpd	23:27:48	6
243739	99	32	31,1	cyclictest	445691	-21	kworker/u32:3+flush-259:0	23:10:15	5
243732	99	32	32,0	cyclictest	0	-21	swapper/11	21:25:25	3
243730	99	32	30,1	cyclictest	170784	-21	kworker/10:1+events	20:51:16	2
243725	99	32	31,1	cyclictest	541891	-21	kworker/u32:1+events_unbound	00:15:19	14
243725	99	32	30,1	cyclictest	0	-21	swapper/8	22:14:04	14
243709	99	32	32,0	cyclictest	0	-21	swapper/3	22:50:46	9
243709	99	32	32,0	cyclictest	0	-21	swapper/3	22:50:45	9
243709	99	32	31,1	cyclictest	516433	-21	kworker/u32:4+events_unbound	23:25:15	9
243709	99	32	31,1	cyclictest	256755	-21	kworker/u32:4+events_unbound	19:40:21	9
243709	99	32	0,1	cyclictest	21	1	rcu_preempt	23:23:18	9
243707	99	32	29,3	cyclictest	1774	-21	snmpd	23:20:37	8
243707	99	32	0,1	cyclictest	0	-21	swapper/2	20:03:58	8
243229	2	32	30,1	sleep13	0	-21	swapper/13	19:09:07	5
243746	99	31	0,30	cyclictest	0	-21	swapper/15	21:48:31	7
243746	99	31	0,0	cyclictest	0	-21	swapper/15	22:25:14	7
243741	99	31	0,30	cyclictest	0	-21	swapper/14	23:59:51	6
243741	99	31	0,30	cyclictest	0	-21	swapper/14	21:02:11	6
243741	99	31	0,0	cyclictest	0	-21	swapper/14	23:40:15	6
243739	99	31	31,0	cyclictest	0	-21	swapper/13	22:14:33	5
243739	99	31	30,1	cyclictest	371688	-21	kworker/u32:2+events_unbound	22:35:17	5
243739	99	31	30,1	cyclictest	0	-21	swapper/13	23:55:10	5
243736	99	31	0,30	cyclictest	0	-21	swapper/12	20:25:15	4
243732	99	31	31,0	cyclictest	0	-21	swapper/11	21:15:43	3
243732	99	31	30,1	cyclictest	394749	-21	kworker/u32:1+events_unbound	21:50:18	3
243732	99	31	28,3	cyclictest	58673	-21	IMAP	19:25:44	3
243730	99	31	30,1	cyclictest	550228	-21	kworker/10:2+events	23:51:13	2
243730	99	31	30,1	cyclictest	459008	-21	kworker/10:2+events	22:57:18	2
243730	99	31	30,1	cyclictest	170784	-21	kworker/10:1+events	20:00:34	2
243730	99	31	29,2	cyclictest	1774	-21	snmpd	23:29:10	2
243730	99	31	29,1	cyclictest	497563	-21	kworker/10:0+events	23:45:02	2
243730	99	31	29,1	cyclictest	459008	-21	kworker/10:2+events	22:41:59	2
243730	99	31	29,1	cyclictest	433746	-21	kworker/10:0+events	22:21:17	2
243730	99	31	29,1	cyclictest	170784	-21	kworker/10:1+events	20:36:09	2
243730	99	31	29,1	cyclictest	170784	-21	kworker/10:1+events	19:43:03	2
243730	99	31	0,31	cyclictest	3578	-21	gnome-shell	21:05:53	2
243727	99	31	30,1	cyclictest	1774	-21	snmpd	00:26:28	15
243725	99	31	31,0	cyclictest	0	-21	swapper/8	23:08:24	14
243725	99	31	31,0	cyclictest	0	-21	swapper/8	21:54:59	14
243725	99	31	31,0	cyclictest	0	-21	swapper/8	21:15:43	14
243725	99	31	30,1	cyclictest	1774	-21	snmpd	23:02:35	14
243719	99	31	30,1	cyclictest	1774	-21	snmpd	19:54:37	12
243719	99	31	30,1	cyclictest	1774	-21	snmpd	19:54:36	12
243714	99	31	30,1	cyclictest	1774	-21	snmpd	19:30:13	10
243714	99	31	0,30	cyclictest	0	-21	swapper/4	23:05:36	10
243714	99	31	0,30	cyclictest	0	-21	swapper/4	21:40:01	10
243709	99	31	31,0	cyclictest	0	-21	swapper/3	22:57:43	9
243709	99	31	31,0	cyclictest	0	-21	swapper/3	22:46:06	9
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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