OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #a, slot #8

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 rackaslot8s.osadl.org (updated Wed Jul 29, 2026 00:45:20)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
11908	2	141	103,26	sleep2	0	-21	swapper/2	19:07:05	2
11818	2	141	104,26	sleep1	0	-21	swapper/1	19:05:56	1
12075	2	139	104,25	sleep0	0	-21	swapper/0	19:09:16	0
11899	2	138	103,24	sleep3	0	-21	swapper/3	19:06:58	3
2525	2	78	0,2	sleep2	0	-21	swapper/2	22:00:23	2
19221	2	59	0,2	sleep0	0	-21	swapper/0	20:40:15	0
4562	2	58	0,2	sleep1	0	-21	swapper/1	21:13:39	1
20355	2	56	0,2	sleep0	0	-21	swapper/0	00:15:38	0
12031	2	55	0,1	sleep0	0	-21	swapper/0	22:56:11	0
4220	2	52	0,1	sleep0	0	-21	swapper/0	21:13:18	0
10230	2	52	0,1	sleep2	0	-21	swapper/2	23:44:37	2
15462	2	49	0,1	sleep1	0	-21	swapper/1	23:23:57	1
5702	2	48	0,3	sleep0	0	-21	swapper/0	23:40:22	0
14866	2	48	0,2	sleep2	0	-21	swapper/2	21:45:22	2
14866	2	48	0,2	sleep2	0	-21	swapper/2	21:45:22	2
10980	2	48	0,1	sleep2	10981	-21	diskmemload	23:45:09	2
16911	2	47	0,2	sleep3	0	-21	swapper/3	19:20:14	3
16911	2	47	0,2	sleep3	0	-21	swapper/3	19:20:13	3
12408	99	47	2,29	cyclictest	22966	-21	cpuspeed_turbos	23:05:15	3
4018	2	46	0,2	sleep3	0	-21	swapper/3	22:01:32	3
25661	2	46	0,2	sleep0	0	-21	swapper/0	22:42:31	0
20559	2	46	0,2	sleep2	0	-21	swapper/2	23:27:24	2
12408	99	46	0,2	cyclictest	0	-21	swapper/3	21:49:13	3
12408	99	46	0,2	cyclictest	0	-21	swapper/3	21:49:13	3
12408	99	45	0,5	cyclictest	31673	-21	diskmemload	23:10:05	3
12918	2	44	0,1	chrt	0	-21	swapper/0	21:44:36	0
12408	99	44	2,22	cyclictest	28536	-21	apt-get	22:45:14	3
29915	2	43	0,2	chrt	0	-21	swapper/1	23:59:26	1
29915	2	43	0,2	chrt	0	-21	swapper/1	23:59:25	1
2029	2	42	0,2	sleep1	0	-21	swapper/1	00:02:14	1
12408	99	42	7,18	cyclictest	19545	-21	sh	23:26:22	3
12408	99	41	7,20	cyclictest	21406	-21	netstat	21:50:21	3
12408	99	41	12,15	cyclictest	24437	-21	mailstats	20:50:24	3
18453	2	40	0,2	sleep0	0	-21	swapper/0	00:39:45	0
12408	99	40	1,26	cyclictest	31673	-21	diskmemload	21:15:15	3
12408	99	39	3,22	cyclictest	7308	-21	seq	20:10:51	3
12408	99	39	3,22	cyclictest	7308	-21	seq	20:10:50	3
12408	99	39	2,24	cyclictest	9354	-21	ssh	21:40:56	3
12408	99	39	11,14	cyclictest	31673	-21	diskmemload	23:00:35	3
12408	99	39	10,16	cyclictest	31673	-21	diskmemload	22:22:22	3
12408	99	38	3,21	cyclictest	31617	-21	taskset	21:09:39	3
12408	99	38	2,21	cyclictest	8976	-21	ssh	22:54:51	3
12408	99	38	1,2	cyclictest	11884	2	chrt	22:56:02	3
12408	99	37	6,18	cyclictest	31673	-21	diskmemload	00:39:39	3
12408	99	37	3,21	cyclictest	29551	-21	sh	23:59:03	3
12408	99	37	3,21	cyclictest	29551	-21	sh	23:59:02	3
12408	99	37	3,21	cyclictest	25027	-21	taskset	19:39:48	3
12408	99	36	4,19	cyclictest	2851	-21	sh	00:03:04	3
12408	99	36	3,18	cyclictest	0	-21	swapper/3	23:44:03	3
12408	99	36	3,18	cyclictest	0	-21	swapper/3	21:29:24	3
12408	99	36	1,18	cyclictest	0	-21	swapper/3	23:20:14	3
12408	99	35	8,14	cyclictest	31673	-21	diskmemload	23:33:21	3
12408	99	33	7,22	cyclictest	13889	-21	grep	20:25:26	3
12408	99	33	3,16	cyclictest	0	-21	swapper/3	22:12:41	3
12408	99	33	1,26	cyclictest	5925	-21	taskset	00:30:12	3
12408	99	33	0,6	cyclictest	23757	-21	ssh	22:16:25	3
12408	99	33	0,4	cyclictest	16134	-21	ssh	00:13:05	3
12408	99	32	8,13	cyclictest	31673	-21	diskmemload	22:44:46	3
12408	99	32	6,24	cyclictest	560	-21	dbus-daemon	20:10:00	3
12408	99	32	6,23	cyclictest	5488	-21	expr	00:05:16	3
12408	99	32	4,14	cyclictest	31673	-21	diskmemload	21:21:38	3
12408	99	32	2,22	cyclictest	0	-21	swapper/3	22:30:12	3
12408	99	32	13,16	cyclictest	20846	-21	grep	19:30:00	3
12408	99	32	0,4	cyclictest	12610	-21	ssh	22:08:33	3
12408	99	32	0,2	cyclictest	0	-21	swapper/3	00:17:17	3
12406	99	32	12,10	cyclictest	22	-21	ksoftirqd/1	23:28:00	1
20591	2	31	0,2	sleep2	0	-21	swapper/2	00:15:52	2
12408	99	31	0,4	cyclictest	2793	-21	ssh	21:36:02	3
12408	99	31	0,3	cyclictest	31673	-21	diskmemload	21:55:02	3
12406	99	31	2,15	cyclictest	14	1	rcu_preempt	22:04:59	1
12408	99	30	7,20	cyclictest	28789	-21	expr	19:45:27	3
12408	99	30	6,22	cyclictest	31652	-21	cat	23:35:25	3
12408	99	30	2,23	cyclictest	0	-21	swapper/3	20:35:12	3
12408	99	30	1,26	cyclictest	26910	-21	grep	20:55:27	3
12408	99	30	1,15	cyclictest	14	1	rcu_preempt	23:45:51	3
12408	99	30	0,3	cyclictest	2439	-21	fschecks_time	22:25:14	3
12408	99	30	0,2	cyclictest	31673	-21	diskmemload	00:26:45	3
26716	2	29	0,7	sleep0	12	-21	ksoftirqd/0	23:31:55	0
12408	99	29	9,17	cyclictest	10013	-21	run-parts	20:20:00	3
12408	99	29	4,23	cyclictest	14344	-21	idleruntime-cro	19:15:00	3
12408	99	29	13,14	cyclictest	27953	-21	rm	00:21:37	3
12408	99	29	0,4	cyclictest	26025	-21	sort	19:40:17	3
12408	99	29	0,3	cyclictest	862	-21	seq	19:55:45	3
12408	99	29	0,3	cyclictest	30995	-21	unixbench-2d	19:50:25	3
12406	99	29	13,2	cyclictest	14	1	rcu_preempt	22:10:14	1
12405	99	29	18,4	cyclictest	12	-21	ksoftirqd/0	22:40:00	0
12405	99	29	16,7	cyclictest	530	50	irq/142-enp3s0-	21:53:51	0
12405	99	29	15,8	cyclictest	530	50	irq/142-enp3s0-	23:58:46	0
12405	99	29	15,8	cyclictest	530	50	irq/142-enp3s0-	23:58:45	0
12408	99	28	3,22	cyclictest	26406	-21	grep	21:30:13	3
12408	99	28	2,23	cyclictest	4026	-21	ssh	23:15:16	3
12408	99	28	2,21	cyclictest	15229	-21	apt-get	22:35:12	3
12408	99	28	1,23	cyclictest	0	-21	swapper/3	20:40:11	3
12405	99	28	9,4	cyclictest	12	-21	ksoftirqd/0	22:25:17	0
12151	2	28	0,2	sleep2	0	-21	swapper/2	22:08:06	2
12408	99	27	0,2	cyclictest	0	-21	swapper/3	20:00:14	3
12406	99	27	9,5	cyclictest	22	-21	ksoftirqd/1	00:06:53	1
12406	99	27	9,4	cyclictest	22	-21	ksoftirqd/1	23:40:50	1
12406	99	27	9,4	cyclictest	22	-21	ksoftirqd/1	00:38:26	1
12406	99	27	8,3	cyclictest	14	1	rcu_preempt	00:34:24	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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