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 Thu Aug 13, 2026 12:44:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1759	2	128	0,2	chrt	1758	-21	ssh	10:17:46	0
18422	2	123	0,3	chrt	18421	-21	sleep	11:31:30	0
11858	2	122	0,2	chrt	11854	-21	ntpq	11:21:37	0
15785	2	118	0,2	chrt	15787	-21	expr	09:50:49	0
13742	2	118	0,2	chrt	13740	-21	ld	08:06:18	0
6402	2	117	0,2	sleep0	6401	-21	seq	11:13:47	0
27341	2	115	0,3	chrt	27326	-21	ntpq	07:36:19	0
26418	2	115	0,3	chrt	25053	-21	apt-get	10:06:43	0
23639	2	115	0,4	chrt	23638	-21	/usr/sbin/munin	10:02:12	0
19890	2	112	0,3	chrt	19891	-21	ssh	09:56:27	0
7671	2	110	0,2	chrt	7672	-21	seq	12:04:38	0
19960	2	110	0,3	chrt	19959	-21	seq	10:45:45	0
12258	2	109	0,2	chrt	12259	-21	seq	10:34:04	0
29061	2	108	0,3	chrt	29062	-21	seq	10:59:34	0
14087	2	108	0,2	chrt	14088	-21	sh	12:13:45	0
23285	2	104	0,3	chrt	23286	-21	sh	08:21:17	0
12029	2	103	0,2	chrt	12030	-21	sleep	08:04:26	0
12095	2	102	0,3	chrt	12093	-21	/usr/sbin/munin	09:45:30	0
22167	2	100	0,3	chrt	22168	-21	ntpq	09:11:33	0
11008	2	95	0,2	sleep0	11009	-21	ssh	12:09:19	0
4694	2	94	0,2	sleep0	4692	-21	sendmail_mailqu	10:22:14	0
30682	2	90	0,1	sleep0	30683	-21	cat	10:12:22	0
15469	2	90	0,2	sleep0	15471	-21	ssh	11:27:11	0
32515	2	85	0,2	sleep0	32516	-21	chrt	07:45:21	0
31112	2	85	0,2	sleep0	31113	-21	seq	08:35:01	0
23130	2	84	0,2	sleep0	23131	-21	aten2.4_rfpower	10:50:36	0
31486	2	80	0,2	sleep0	31488	-21	rm	11:02:23	0
9486	2	78	0,2	sleep0	9490	-21	grep	09:41:04	0
16562	2	77	0,2	sleep0	16563	-21	chrt	07:20:02	0
9038	2	75	0,2	sleep0	9039	-21	chrt	10:29:17	0
13387	2	75	0,2	sleep0	13389	-21	chrt	07:15:00	0
4494	2	72	0,2	sleep0	4496	-21	grep	07:51:24	0
10320	2	72	0,1	sleep0	10323	-21	wc	11:20:04	0
4529	2	69	0,2	sleep0	4532	-21	tr	12:00:01	0
8323	2	68	0,2	sleep0	8324	-21	seq	08:50:05	0
31043	2	68	0,1	sleep0	31044	-21	chrt	12:39:15	0
10342	90	65	34,22	cyclictest	30177	-21	apt-get	11:51:29	0
10342	90	62	28,13	cyclictest	5230	-21	awk	08:45:10	0
19689	2	61	0,2	sleep0	19691	-21	ls	07:25:02	0
16079	2	60	0,2	sleep0	16080	-21	rm	12:16:24	0
10342	90	60	28,23	cyclictest	911	-21	perl	11:05:51	0
10342	90	59	27,22	cyclictest	21779	-21	telnet	12:25:31	0
10342	90	58	29,11	cyclictest	17960	-21	apt-get	12:20:56	0
10342	90	58	25,14	cyclictest	24193	-21	ntpq	07:31:17	0
10342	90	57	33,15	cyclictest	3559	-21	sleep	09:31:55	0
10342	90	57	26,12	cyclictest	18358	-21	/usr/sbin/munin	09:05:41	0
10342	90	57	25,23	cyclictest	22004	-21	ntp_states	11:37:01	0
10342	90	57	25,13	cyclictest	3189	-21	ntp_states	08:41:11	0
10342	90	57	24,14	cyclictest	23978	-21	apt-get	09:16:44	0
10342	90	56	36,13	cyclictest	32421	-21	sed	09:26:52	0
10342	90	56	33,14	cyclictest	30804	-21	munin-run	09:25:06	0
10342	90	56	26,21	cyclictest	5532	-21	telnet	09:35:33	0
10342	90	56	26,20	cyclictest	17293	-21	ntp_states	08:12:03	0
10342	90	56	25,22	cyclictest	13310	-21	diskstats	10:35:45	0
10342	90	56	25,21	cyclictest	30195	-21	ssh	11:50:03	0
10342	90	56	24,23	cyclictest	16641	-21	diskstats	10:40:46	0
10342	90	55	25,20	cyclictest	25897	-21	sed	12:31:04	0
10342	90	55	24,23	cyclictest	12733	-21	ntpq	08:56:13	0
10342	90	54	31,14	cyclictest	28949	-21	apt-get	07:40:41	0
10342	90	54	30,16	cyclictest	23769	-21	runrttasks	11:40:17	0
10342	90	54	24,21	cyclictest	15298	-21	irqrtprio	09:00:44	0
10342	90	54	23,22	cyclictest	25589	-21	hddtemp_smartct	08:25:37	0
10342	90	54	23,13	cyclictest	21091	-21	ntpq	07:26:15	0
10342	90	53	28,15	cyclictest	6190	-21	apt-get	07:55:14	0
10342	90	53	28,15	cyclictest	18840	-21	apt-get	08:15:13	0
10342	90	52	26,19	cyclictest	32518	-21	ntp_states	08:36:10	0
10342	90	49	25,15	cyclictest	10288	-21	latency_hist	07:10:03	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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