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 100 highest latencies:

System rackfslot4s.osadl.org (updated Wed Jul 29, 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
21570	2	129	0,3	chrt	21567	-21	ntpq	23:16:58	0
6654	2	125	0,2	chrt	6648	-21	ntpq	00:31:49	0
32579	2	124	0,2	sleep0	32577	-21	ntp_states	00:22:02	0
25244	2	122	0,2	chrt	25246	-21	cut	00:11:04	0
21322	2	122	0,3	chrt	21323	-21	chrt	20:50:37	0
5244	2	121	0,2	chrt	5245	-21	runrttasks	22:52:16	0
2473	2	119	0,3	chrt	2474	-21	seq	22:48:18	0
18753	2	119	0,4	chrt	18755	-21	kernelversion	20:45:47	0
7105	2	117	0,3	chrt	7103	-21	df	22:55:38	0
334	2	117	0,2	sleep0	338	-21	chrt	19:25:10	0
27734	2	117	0,2	chrt	27732	-21	ntpq	19:16:02	0
31226	2	116	0,2	chrt	31227	-21	/usr/sbin/munin	23:31:49	0
10296	2	116	0,2	chrt	10295	-21	seq	23:48:52	0
28486	2	112	0,2	chrt	28488	-21	cut	00:16:09	0
10872	2	112	0,2	chrt	10873	-21	sleep	22:12:27	0
1783	2	111	0,2	sleep0	1784	-21	chrt	21:59:31	0
15801	2	111	0,3	chrt	15802	-21	grep	23:56:48	0
399	2	110	0,3	chrt	400	-21	sleep	21:08:30	0
10580	2	110	0,2	chrt	10581	-21	chrt	23:00:53	0
23184	2	109	0,2	chrt	23167	-21	ntpq	20:00:54	0
14001	2	109	0,2	chrt	14003	-21	sh	19:46:09	0
30791	2	107	0,2	chrt	30792	-21	sleep	21:54:16	0
25039	2	106	0,3	chrt	25040	-21	sleep	20:55:45	0
17461	2	106	0,2	chrt	17462	-21	seq	20:44:28	0
12225	2	106	0,3	chrt	12226	-21	sh	19:43:58	0
31431	2	104	0,3	chrt	31432	-21	sleep	19:21:39	0
23469	2	102	0,2	chrt	23470	-21	sh	19:10:09	0
10614	2	100	0,2	sleep0	10615	-21	seq	21:24:01	0
13607	2	98	0,2	sleep0	13608	-21	basename	23:05:36	0
30380	2	97	0,2	sleep0	30378	-21	missed_timers	22:41:15	0
20915	2	96	0,3	sleep0	20913	-21	python3	22:27:15	0
1719	2	95	0,2	sleep0	1720	-21	cat	23:36:01	0
4004	2	90	0,2	sleep0	4005	-21	chrt	22:02:19	0
29693	2	89	0,1	sleep0	29694	-21	chrt	23:29:47	0
25248	2	81	0,2	sleep0	25249	-21	seq	23:22:22	0
5443	2	80	0,2	sleep0	5446	-21	cut	21:16:11	0
11310	2	80	0,1	sleep0	11315	-21	apt-key	20:35:05	0
3548	2	79	0,2	sleep0	3549	-21	seq	00:27:15	0
25701	2	77	0,1	sleep0	25703	-21	chrt	21:46:12	0
12609	2	75	0,2	sleep0	12608	-21	seq	21:26:36	0
23360	90	74	42,22	cyclictest	4521	-21	ntpq	19:30:54	0
19833	2	74	0,2	sleep0	19834	-21	chrt	00:02:48	0
29283	2	73	0,2	sleep0	29286	-21	sed	20:10:48	0
23360	90	73	38,26	cyclictest	15860	-21	seq	22:20:28	0
23360	90	72	38,22	cyclictest	23037	-21	hddtemp_smartct	22:30:57	0
23360	90	71	38,12	cyclictest	12060	-21	apt-get	22:16:07	0
23360	90	71	37,15	cyclictest	32534	-21	ntpq	20:16:00	0
23360	90	70	37,24	cyclictest	8388	-21	ssh	22:09:15	0
23360	90	70	37,15	cyclictest	7480	-21	latency_hist	23:45:04	0
23360	90	69	46,15	cyclictest	25908	-21	ssh	22:35:18	0
23360	90	69	38,23	cyclictest	21715	-21	ssh	21:40:45	0
23360	90	69	38,22	cyclictest	1141	-21	ssh	21:10:09	0
23360	90	69	38,21	cyclictest	2464	-21	diskstats	20:20:32	0
23360	90	69	38,21	cyclictest	11762	-21	sleep	20:35:34	0
23360	90	69	37,22	cyclictest	18986	-21	/usr/sbin/munin	19:55:24	0
23360	90	69	37,21	cyclictest	11019	-21	ssh	23:50:17	0
23360	90	68	45,13	cyclictest	10307	-21	python3	00:37:17	0
23360	90	68	43,16	cyclictest	6557	-21	apt-get	19:35:15	0
23360	90	68	39,19	cyclictest	14582	-21	apt-get	21:30:13	0
23360	90	68	36,13	cyclictest	15892	-21	/usr/sbin/munin	19:50:26	0
23360	90	67	42,16	cyclictest	17915	-21	apt-get	21:35:16	0
23360	90	67	38,20	cyclictest	21555	-21	perl	00:05:55	0
23360	90	67	36,22	cyclictest	26337	-21	ntpq	20:06:00	0
23360	90	66	42,15	cyclictest	17073	-21	df	23:10:38	0
23360	90	65	44,13	cyclictest	28504	-21	ld	21:00:57	0
23360	90	65	43,14	cyclictest	412	-21	snmpd	20:25:13	0
23360	90	61	35,12	cyclictest	23300	-21	latency_hist	19:10:04	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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