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
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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.
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 Mon Jul 13, 2026 00:46:20)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
984593	2	383	348,27	sleep3	0	-21	swapper/3	19:05:58	9
984877	2	382	363,12	sleep7	0	-21	swapper/7	19:09:46	13
984658	2	361	326,28	sleep6	0	-21	swapper/6	19:06:48	12
984776	2	360	341,12	sleep5	0	-21	swapper/5	19:08:24	11
984748	2	358	320,14	sleep0	0	-21	swapper/0	19:08:03	0
984628	2	357	316,14	sleep13	0	-21	swapper/13	19:06:23	5
984671	2	354	334,13	sleep2	0	-21	swapper/2	19:07:01	8
984763	2	353	333,13	sleep15	0	-21	swapper/15	19:08:18	7
984677	2	353	333,13	sleep8	0	-21	swapper/8	19:07:07	14
984656	2	353	333,13	sleep4	0	-21	swapper/4	19:06:47	10
984679	2	352	340,8	sleep10	0	-21	swapper/10	19:07:09	2
981426	2	351	332,12	sleep14	0	-21	swapper/14	19:05:04	6
984882	2	349	330,13	sleep12	0	-21	swapper/12	19:09:51	4
984670	2	348	329,13	sleep1	0	-21	swapper/1	19:07:00	1
984561	2	345	325,13	sleep11	0	-21	swapper/11	19:05:34	3
984740	2	344	323,14	sleep9	0	-21	swapper/9	19:07:57	15
985337	99	53	52,1	cyclictest	1110510	-21	kworker/u32:1+flush-259:0	21:40:52	4
985342	99	52	27,0	cyclictest	1142031	-21	ssh	21:51:14	6
985300	99	49	47,1	cyclictest	1110510	-21	kworker/u32:1+events_unbound	21:41:34	0
985333	99	48	47,0	cyclictest	0	-21	swapper/11	22:50:14	3
985345	99	45	44,0	cyclictest	0	-21	swapper/15	22:50:15	7
985306	99	44	13,2	cyclictest	1323794	-21	kworker/u32:0+flush-259:0	00:21:14	8
985312	99	42	38,3	cyclictest	1168038	-21	kworker/u32:3+flush-259:0	22:15:26	10
985342	99	41	39,2	cyclictest	1168038	-21	kworker/u32:3+flush-259:0	22:51:16	6
985327	99	40	38,2	cyclictest	1086100	-21	kworker/u32:3+flush-259:0	21:29:58	15
985327	99	39	37,1	cyclictest	1035911	-21	kworker/u32:5+events_unbound	20:45:16	15
985345	99	38	33,4	cyclictest	0	-21	swapper/15	20:25:20	7
985342	99	38	14,11	cyclictest	0	-21	swapper/14	19:50:24	6
985333	99	38	37,1	cyclictest	0	-21	swapper/11	21:40:15	3
985345	99	37	36,0	cyclictest	0	-21	swapper/15	23:24:52	7
985342	99	37	1,11	cyclictest	0	-21	swapper/14	21:40:14	6
985345	99	35	33,1	cyclictest	0	-21	swapper/15	22:10:17	7
985345	99	35	32,0	cyclictest	21	1	rcu_preempt	23:49:43	7
985339	99	35	34,0	cyclictest	0	-21	swapper/13	23:05:29	5
985306	99	35	13,1	cyclictest	1302675	-21	kworker/u32:1+flush-259:0	00:06:39	8
985333	99	34	33,1	cyclictest	976204	-21	kworker/u32:0+flush-259:0	19:10:28	3
985345	99	33	33,0	cyclictest	0	-21	swapper/15	22:17:44	7
985345	99	33	32,0	cyclictest	0	-21	swapper/15	20:30:20	7
985339	99	33	33,0	cyclictest	0	-21	swapper/13	23:10:27	5
985339	99	33	33,0	cyclictest	0	-21	swapper/13	22:54:12	5
985339	99	33	33,0	cyclictest	0	-21	swapper/13	21:25:12	5
985333	99	33	33,0	cyclictest	0	-21	swapper/11	22:26:16	3
985327	99	33	0,30	cyclictest	1104363	-21	ssh	21:22:41	15
985321	99	33	33,0	cyclictest	0	-21	swapper/7	20:30:20	13
985304	99	33	0,30	cyclictest	0	-21	swapper/1	21:35:16	1
985300	99	33	32,1	cyclictest	1303142	-21	kworker/u32:3+events_unbound	00:07:30	0
985345	99	32	32,0	cyclictest	0	-21	swapper/15	00:05:21	7
985339	99	32	32,0	cyclictest	0	-21	swapper/13	21:15:02	5
985339	99	32	0,1	cyclictest	0	-21	swapper/13	00:20:15	5
985333	99	32	31,1	cyclictest	0	-21	swapper/11	22:55:17	3
985327	99	32	0,30	cyclictest	0	-21	swapper/9	21:59:17	15
985316	99	32	0,31	cyclictest	0	-21	swapper/5	20:55:17	11
985306	99	32	30,2	cyclictest	1303142	-21	kworker/u32:3+flush-259:0	00:26:16	8
985345	99	31	31,0	cyclictest	0	-21	swapper/15	22:00:19	7
985345	99	31	30,1	cyclictest	1347443	-21	kworker/u32:0+events_unbound	00:35:15	7
985342	99	31	8,10	cyclictest	0	-21	swapper/14	20:01:23	6
985342	99	31	7,11	cyclictest	0	-21	swapper/14	23:08:07	6
985342	99	31	7,11	cyclictest	0	-21	swapper/14	21:29:16	6
985342	99	31	7,11	cyclictest	0	-21	swapper/14	00:14:01	6
985333	99	31	31,0	cyclictest	0	-21	swapper/11	23:49:17	3
985333	99	31	31,0	cyclictest	0	-21	swapper/11	21:15:01	3
985333	99	31	30,1	cyclictest	1774	-21	snmpd	22:31:00	3
985333	99	31	30,1	cyclictest	1774	-21	snmpd	00:00:24	3
985333	99	31	30,1	cyclictest	1206504	-21	kworker/u32:0+events_unbound	23:15:23	3
985333	99	31	29,2	cyclictest	1206504	-21	kworker/u32:0+events_unbound	23:12:45	3
985331	99	31	1,30	cyclictest	0	-21	swapper/10	19:13:22	2
985327	99	31	28,3	cyclictest	1774	-21	snmpd	21:09:01	15
985327	99	31	23,8	cyclictest	1774	-21	snmpd	23:37:59	15
985324	99	31	30,1	cyclictest	1108338	-21	nodev-device-ev	21:25:17	14
985324	99	31	0,30	cyclictest	0	-21	swapper/8	22:26:01	14
985321	99	31	29,2	cyclictest	0	-21	swapper/7	20:25:20	13
985318	99	31	0,30	cyclictest	0	-21	swapper/6	21:06:32	12
985318	99	31	0,30	cyclictest	0	-21	swapper/6	19:40:16	12
985318	99	31	0,30	cyclictest	0	-21	swapper/6	19:35:15	12
985318	99	31	0,30	cyclictest	0	-21	swapper/6	19:35:14	12
985318	99	31	0,30	cyclictest	0	-21	swapper/6	19:30:15	12
985318	99	31	0,30	cyclictest	0	-21	swapper/6	19:30:14	12
985306	99	31	30,1	cyclictest	1774	-21	snmpd	23:33:21	8
985306	99	31	30,1	cyclictest	1774	-21	snmpd	23:04:47	8
985306	99	31	0,30	cyclictest	0	-21	swapper/2	23:07:04	8
985304	99	31	30,1	cyclictest	1774	-21	snmpd	00:06:37	1
985345	99	30	30,0	cyclictest	0	-21	swapper/15	22:41:17	7
985345	99	30	30,0	cyclictest	0	-21	swapper/15	22:41:17	7
985345	99	30	30,0	cyclictest	0	-21	swapper/15	21:45:18	7
985345	99	30	30,0	cyclictest	0	-21	swapper/15	21:15:04	7
985345	99	30	29,1	cyclictest	160	-21	ksoftirqd/15	22:26:16	7
985345	99	30	28,1	cyclictest	1189764	-21	kworker/15:0+mm_percpu_wq	00:22:16	7
985342	99	30	6,11	cyclictest	0	-21	swapper/14	20:45:19	6
985342	99	30	29,1	cyclictest	1774	-21	snmpd	19:57:21	6
985342	99	30	29,1	cyclictest	1774	-21	snmpd	00:04:15	6
985342	99	30	0,1	cyclictest	0	-21	swapper/14	21:07:20	6
985339	99	30	30,0	cyclictest	0	-21	swapper/13	23:50:30	5
985339	99	30	30,0	cyclictest	0	-21	swapper/13	23:49:43	5
985339	99	30	30,0	cyclictest	0	-21	swapper/13	23:42:41	5
985339	99	30	30,0	cyclictest	0	-21	swapper/13	23:23:11	5
985339	99	30	30,0	cyclictest	0	-21	swapper/13	22:17:45	5
985339	99	30	30,0	cyclictest	0	-21	swapper/13	21:43:00	5
985339	99	30	30,0	cyclictest	0	-21	swapper/13	00:09:35	5
985339	99	30	29,1	cyclictest	1086100	-21	kworker/u32:3+events_unbound	21:22:41	5
985339	99	30	29,1	cyclictest	0	-21	swapper/13	22:14:36	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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