OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #f, 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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system

Characteristics of the 376 highest latencies:

System rackfslot4s.osadl.org (updated Sat Apr 18, 2026 00:44:35)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
27978	2	137	0,2	sleep0	27979	-21	seq	23:10:18	0
14690	2	126	0,2	chrt	14685	-21	apt-config	22:50:19	0
22042	2	121	0,2	sleep0	22045	-21	wc	22:12:27	0
11270	2	120	0,3	chrt	11269	-21	/usr/sbin/munin	22:45:30	0
23913	2	118	0,2	chrt	23911	-21	/usr/sbin/munin	20:35:51	0
25704	2	117	0,2	chrt	24610	-21	/usr/sbin/munin	23:06:10	0
501	2	115	0,2	chrt	502	-21	fschecks_time	21:40:53	0
9587	2	113	0,2	chrt	9588	-21	seq	19:20:53	0
25768	2	111	0,2	chrt	25769	-21	sleep	21:30:29	0
16523	2	110	0,2	chrt	16524	-21	sleep	19:31:52	0
30531	2	109	0,2	sleep0	30532	-21	seq	21:36:52	0
28991	2	109	0,1	sleep0	28992	-21	runrttasks	22:22:53	0
16778	2	109	0,2	chrt	16779	-21	ssh	22:05:27	0
15809	2	107	0,2	sleep0	15810	-21	runrttasks	22:03:25	0
5095	2	106	0,2	chrt	5096	-21	sleep	20:58:07	0
8250	2	104	0,2	chrt	8251	-21	seq	23:29:10	0
22279	2	94	0,2	sleep0	22280	-21	seq	21:25:08	0
15160	2	92	0,2	sleep0	15161	-21	chrt	23:39:49	0
10993	2	87	0,2	sleep0	10994	-21	runrttasks	22:45:02	0
28314	2	85	0,2	chrt	28297	-21	ntpq	19:51:02	0
8036	2	82	0,2	sleep0	8038	-21	cut	20:10:47	0
21574	2	81	0,2	sleep0	21575	-21	chrt	23:49:13	0
16870	2	81	0,2	chrt	16843	-21	ntpq	23:41:38	0
8694	2	80	0,2	sleep0	8695	-21	chrt	00:18:19	0
4137	2	77	0,2	sleep0	4141	-21	sed	21:46:06	0
11332	2	77	0,1	sleep0	11333	-21	seq	23:33:36	0
10695	2	77	0,2	sleep0	10697	-21	cat	21:56:02	0
29246	2	76	0,2	sleep0	29247	-21	seq	20:45:23	0
16988	2	76	0,2	sleep0	16989	-21	chrt	20:25:36	0
1263	2	76	0,2	sleep0	1264	-21	chrt	20:00:26	0
7356	2	74	0,2	sleep0	7357	-21	sh	22:39:25	0
842	2	72	0,2	sleep0	843	-21	chrt	22:30:05	0
18570	2	71	0,2	sleep0	18571	-21	chrt	21:19:38	0
9299	2	68	0,2	sleep0	9302	-21	chrt	21:05:24	0
25963	2	68	0,2	sleep0	25964	-21	chrt	23:55:50	0
6178	2	67	0,2	sleep0	6179	-21	aten2.4_rfpower	21:00:25	0
25298	2	65	0,2	sleep0	25297	-21	ls	23:55:03	0
3935	2	63	0,1	sleep0	3937	-21	cut	00:11:04	0
32205	2	63	0,2	sleep0	32213	-21	basename	00:05:30	0
21595	2	62	0,1	sleep0	21593	-21	python3	20:32:17	0
21106	2	61	0,2	sleep0	21110	-21	tr	23:00:01	0
9790	2	60	0,2	sleep0	9792	-21	runrttasks	21:55:00	0
30286	2	57	0,2	sleep0	30285	-21	seq	00:01:49	0
2165	90	54	23,21	cyclictest	11635	-21	users	00:22:22	0
2165	90	54	21,23	cyclictest	14200	-21	ssh	00:26:23	0
2165	90	54	19,13	cyclictest	25361	-21	ntpq	19:46:18	0
2165	90	53	22,21	cyclictest	21227	-21	ntp_states	00:37:01	0
2165	90	53	22,12	cyclictest	19354	-21	cpuspeed	21:20:39	0
2165	90	53	21,23	cyclictest	26355	-21	df	20:40:29	0
2165	90	53	21,23	cyclictest	1824	-21	diskstats	22:31:17	0
2165	90	53	21,23	cyclictest	13937	-21	ssh	21:12:19	0
2165	90	53	20,13	cyclictest	1958	-21	munin-run	23:20:02	0
2165	90	52	23,11	cyclictest	21988	-21	runrttasks	23:00:59	0
2165	90	52	22,22	cyclictest	17843	-21	ntp_states	00:31:55	0
2165	90	52	21,21	cyclictest	30392	-21	aten2.4_rfpower	19:55:23	0
2165	90	52	20,13	cyclictest	25026	-21	ntp_states	22:17:08	0
2165	90	52	20,12	cyclictest	5153	-21	ntpq	20:06:00	0
2165	90	51	28,13	cyclictest	3568	-21	ntpq	23:21:38	0
2165	90	51	21,22	cyclictest	12570	-21	latency	19:25:47	0
2165	90	51	20,21	cyclictest	13378	-21	apt	20:20:11	0
2165	90	50	25,15	cyclictest	10232	-21	apt-get	20:15:14	0
2165	90	50	19,22	cyclictest	436	-21	runrttasks	19:35:11	0
2165	90	49	31,11	cyclictest	5777	-21	cat	19:15:34	0
2165	90	49	24,16	cyclictest	3713	-21	ps	19:11:23	0
2165	90	49	24,15	cyclictest	32209	-21	apt-get	20:50:11	0
2165	90	49	17,14	cyclictest	21834	-21	irqstats	19:40:44	0
31828	2	48	12,20	sleep0	31903	-21	df	19:05:21	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2024-02-27 - 12:39