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 Aug 29, 2026 12:44:35)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
16211	2	135	0,3	chrt	16209	-21	ls	10:52:19	0
27134	2	134	0,2	sleep0	27135	-21	chrt	07:50:02	0
21072	2	121	0,3	chrt	21075	-21	sed	10:11:02	0
22599	2	120	0,2	sleep0	22659	-21	cat	09:25:05	0
11376	2	120	0,3	chrt	11377	-21	sleep	07:24:27	0
28954	2	119	0,3	chrt	28955	-21	cat	12:00:48	0
27331	2	118	0,2	chrt	27310	-21	ntpq	09:31:24	0
19728	2	117	0,2	chrt	19729	-21	chrt	10:09:28	0
1412	2	117	0,2	sleep0	1413	-21	missed_timers	09:41:13	0
6652	2	116	0,4	chrt	6641	-21	ntpq	11:26:39	0
24017	2	115	0,2	chrt	24020	-21	irqrtprio	08:35:46	0
12849	2	113	0,3	chrt	12850	-21	chrt	09:58:55	0
27298	2	111	0,3	chrt	27299	-21	sh	10:20:49	0
1419	2	109	0,2	chrt	1420	-21	sh	08:00:31	0
4260	2	105	0,2	sleep0	4261	-21	sh	10:35:05	0
29359	2	104	0,2	chrt	29360	-21	sleep	07:52:39	0
22724	2	101	0,2	sleep0	22725	-21	seq	11:02:15	0
13221	2	94	0,2	sleep0	13222	-21	seq	10:47:57	0
3082	2	88	0,2	sleep0	3084	-21	missed_timers	11:21:13	0
26203	2	87	0,2	sleep0	26207	-21	tr	11:07:14	0
14036	2	84	0,2	sleep0	14037	-21	chrt	12:26:40	0
1877	90	83	7,65	cyclictest	31793	-21	apt-get	12:05:20	0
15262	2	79	0,2	sleep0	15260	-21	proc_pri	10:02:12	0
11871	2	78	0,2	sleep0	11872	-21	chrt	07:25:23	0
19255	2	77	0,2	sleep0	19256	-21	seq	12:35:14	0
18534	2	76	0,2	sleep0	18537	-21	cut	10:56:04	0
1938	2	75	0,2	sleep0	1939	-21	cat	07:10:04	0
1877	90	75	6,51	cyclictest	4699	-21	memory	09:46:12	0
1877	90	75	4,52	cyclictest	18976	-21	diskstats	11:45:48	0
1877	90	74	6,58	cyclictest	15206	-21	apt-get	11:40:20	0
1877	90	74	5,59	cyclictest	25145	-21	apt-get	11:55:25	0
1877	90	74	5,10	cyclictest	25482	-21	users	10:17:22	0
1877	90	74	4,60	cyclictest	7315	-21	runrttasks	09:15:07	0
1877	90	74	4,11	cyclictest	7211	-21	ntpq	12:16:21	0
1877	90	74	13,51	cyclictest	7641	-21	if_err_eth2	09:51:01	0
1877	90	73	5,58	cyclictest	12901	-21	irqstats	11:36:07	0
1877	90	73	5,57	cyclictest	4189	-21	sshd	08:05:15	0
1877	90	73	5,11	cyclictest	30696	-21	ntpq	08:46:10	0
1877	90	73	5,11	cyclictest	18934	-21	memory	07:35:48	0
1877	90	73	4,11	cyclictest	1315	-21	ntpq	08:51:09	0
1877	90	73	12,51	cyclictest	10432	-21	memory	12:21:10	0
1877	90	72	6,56	cyclictest	29375	-21	apt-get	09:35:14	0
1877	90	72	6,55	cyclictest	4650	-21	users	12:12:22	0
1877	90	72	5,9	cyclictest	6915	-21	ntpq	07:16:47	0
1877	90	72	5,10	cyclictest	21462	-21	ntpq	08:31:42	0
1877	90	72	4,8	cyclictest	23579	-21	ps	09:26:03	0
1877	90	72	4,10	cyclictest	17383	-21	ntpq	12:31:44	0
1877	90	72	15,47	cyclictest	3547	-21	ssh	10:33:40	0
1877	90	72	13,50	cyclictest	10244	2	sleep	10:43:46	0
1877	90	71	6,52	cyclictest	7267	-21	apt-get	08:10:20	0
1877	90	71	4,56	cyclictest	17100	-21	sshd	07:33:07	0
1877	90	71	4,10	cyclictest	30248	-21	sh	10:25:34	0
1877	90	71	4,10	cyclictest	23055	-21	sshd	11:51:19	0
1877	90	71	13,48	cyclictest	9189	-21	hddtemp_smartct	11:30:56	0
1877	90	70	5,9	cyclictest	26700	-21	df	08:40:31	0
1877	90	70	5,9	cyclictest	18076	-21	ntp_states	08:26:12	0
1877	90	70	5,10	cyclictest	9793	-21	diskstats	09:05:32	0
1877	90	70	5,10	cyclictest	14066	-21	ntpq	09:11:53	0
1877	90	70	4,9	cyclictest	22399	-21	ntp_states	07:41:16	0
1877	90	70	4,57	cyclictest	31484	-21	diskstats	11:15:47	0
1877	90	70	4,54	cyclictest	13717	-21	/usr/sbin/munin	08:20:24	0
1877	90	70	4,10	cyclictest	7312	-21	memory	09:00:49	0
1877	90	70	4,10	cyclictest	11517	-21	/usr/sbin/munin	08:16:31	0
1877	90	69	6,9	cyclictest	28107	-21	cpuspeed	11:10:38	0
1877	90	69	5,54	cyclictest	3459	-21	/usr/sbin/munin	08:55:26	0
1877	90	69	4,9	cyclictest	5136	-21	apt	07:15:00	0
1877	90	68	4,9	cyclictest	30922	-21	hddtemp_smartct	07:55:39	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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