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 all highest latencies:

System rackfslot4s.osadl.org (updated Sat Aug 22, 2026 00:44:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
25704	2	119	0,2	chrt	25692	-21	ntp_states	19:31:18	0
12249	2	119	0,2	chrt	12244	-21	ntpq	22:31:45	0
30189	2	118	0,2	sleep0	30190	-21	sh	23:46:51	0
21847	2	117	0,3	chrt	21848	-21	/usr/sbin/munin	21:57:28	0
4005	2	116	0,2	chrt	4006	-21	irqrtprio	21:31:11	0
23590	2	116	0,2	chrt	23578	-21	ntpq	21:11:50	0
3980	2	115	0,3	chrt	3981	-21	sleep	23:56:14	0
22193	2	114	0,2	chrt	22194	-21	chrt	23:35:32	0
23876	2	113	0,2	chrt	23875	-21	/usr/sbin/munin	22:01:02	0
16487	2	113	0,2	chrt	16488	-21	sleep	21:50:15	0
6836	2	112	0,2	chrt	6835	-21	ld	23:12:01	0
11915	2	112	0,3	chrt	11916	-21	sleep	00:08:22	0
24042	2	111	0,1	sleep0	24067	-21	chrt	22:50:04	0
2341	2	111	0,2	sleep0	2342	-21	seq	23:54:19	0
19475	2	111	0,3	chrt	19476	-21	sleep	00:20:13	0
9792	2	110	0,1	sleep0	9793	-21	chrt	23:16:23	0
31288	2	110	0,2	chrt	31285	-21	ntpq	22:11:43	0
19144	2	110	0,2	chrt	19146	-21	sed	19:20:45	0
16339	2	110	0,3	chrt	16335	-21	telnet	00:15:32	0
15122	2	110	0,3	chrt	15123	-21	cat	23:25:07	0
2325	2	109	0,2	chrt	2326	-21	sh	21:28:46	0
28772	2	96	0,2	sleep0	28773	-21	ls	21:20:06	0
28384	2	95	0,1	sleep0	28385	-21	rm	23:44:50	0
27239	2	89	0,2	sleep0	27240	-21	seq	00:31:10	0
8210	2	86	0,2	sleep0	8212	-21	grep	21:37:18	0
4413	2	85	0,3	sleep0	4414	-21	seq	23:08:32	0
25163	2	84	0,2	sleep0	25164	-21	chrt	00:28:12	0
8681	2	83	0,2	chrt	8663	-21	ntpq	19:56:08	0
10860	2	82	0,2	sleep0	10863	-21	wc	20:51:25	0
21130	2	81	0,2	sleep0	21131	-21	seq	20:15:52	0
5000	2	80	0,2	sleep0	5003	-21	cut	22:21:08	0
9261	2	77	0,2	sleep0	9260	-21	seq	00:04:58	0
8826	2	75	8,53	sleep0	8831	-21	apt-get	19:05:13	0
6394	2	74	0,2	sleep0	6395	-21	chrt	20:45:22	0
15095	2	71	0,2	sleep0	15096	-21	chrt	00:13:03	0
30684	2	68	0,2	sleep0	30685	-21	seq	19:40:20	0
26225	2	65	0,2	sleep0	26228	-21	wc	20:25:03	0
21488	2	65	0,1	sleep0	21489	-21	chrt	19:25:21	0
20144	2	62	0,2	sleep0	20145	-21	seq	22:43:50	0
2753	2	58	5,9	sleep0	2795	-21	users	22:17:30	0
12686	2	58	0,2	sleep0	12689	-21	cut	19:10:43	0
9883	2	57	0,2	sleep0	9879	-21	ssh	22:28:21	0
28077	2	56	4,8	sleep0	28080	-21	seq	22:06:58	0
30176	2	53	3,10	sleep0	29252	-21	apt-get	00:36:02	0
24965	2	53	0,2	sleep0	24967	-21	if_err_eth2	22:51:04	0
15884	2	53	3,8	sleep0	15867	-21	apt-get	21:00:13	0
28501	2	52	0,1	sleep0	28502	-21	awk	19:35:47	0
31321	2	51	3,9	sleep0	30969	-21	apt-get	23:00:45	0
12751	2	51	0,2	chrt	12752	-21	apt-get	20:55:10	0
17772	2	50	0,1	sleep0	17773	-21	fschecks_time	20:11:25	0
16707	2	49	4,37	sleep0	16712	-21	chrt	19:16:30	0
10605	2	49	0,3	chrt	10603	-21	/usr/sbin/munin	21:41:06	0
11831	90	48	20,21	cyclictest	0	-21	swapper	23:28:50	0
11831	90	48	16,22	cyclictest	0	-21	swapper	21:48:03	0
4292	2	47	0,3	sleep0	4283	-21	ntpq	20:40:56	0
16209	2	47	1,4	sleep0	0	-21	swapper	20:08:55	0
18736	2	46	0,2	sleep0	18737	-21	chrt	23:30:19	0
15895	2	46	0,3	sleep0	15890	-21	ssh	22:37:18	0
11831	90	45	16,21	cyclictest	0	-21	swapper	22:58:23	0
13419	2	43	1,4	sleep0	0	-21	swapper	20:04:47	0
11831	90	43	11,16	cyclictest	0	-21	swapper	20:29:22	0
6887	2	42	0,2	chrt	6888	-21	modprobe	19:53:56	0
11831	90	42	7,15	cyclictest	29459	-21	apt-get	20:30:15	0
11831	90	42	16,20	cyclictest	0	-21	swapper	21:06:31	0
11831	90	41	5,10	cyclictest	31181	-21	sleep	21:23:10	0
11831	90	39	4,15	cyclictest	2746	-21	grep	19:46:24	0
11831	90	37	19,11	cyclictest	32511	-21	runrttasks	20:35:04	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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