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 Sun Sep 20, 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
25868	2	126	0,2	chrt	25870	-21	open_inodes	23:32:14	0
488	2	123	0,3	chrt	475	-21	ntpq	00:31:29	0
2677	2	118	0,3	chrt	2676	-21	awk	19:36:23	0
3392	2	116	0,2	chrt	3390	-21	df	20:30:29	0
22121	2	116	0,2	chrt	22122	-21	/usr/sbin/munin	23:26:25	0
6385	2	114	0,2	sleep0	6386	-21	ld	23:51:36	0
7559	2	113	0,3	chrt	7558	-21	apt-get	19:45:14	0
31459	2	113	0,2	chrt	31458	-21	apt-config	21:15:17	0
15353	2	113	0,2	chrt	15352	-21	seq	21:39:54	0
1564	2	112	0,2	sleep0	1562	-21	sendmail_mailqu	22:07:14	0
15991	2	110	0,1	sleep0	15992	-21	seq	22:29:29	0
7027	2	109	0,2	sleep0	7028	-21	ntp_kernel_pll_	21:26:36	0
16671	2	109	0,2	sleep0	16672	-21	chrt	20:51:06	0
14924	2	109	0,2	sleep0	14925	-21	ntp_kernel_pll_	19:56:06	0
23927	2	106	0,2	chrt	23928	-21	seq	21:52:08	0
27529	2	102	0,2	sleep0	27530	-21	seq	19:25:05	0
23753	2	102	0,2	chrt	23754	-21	sh	19:18:36	0
31941	2	95	0,2	sleep0	31942	-21	chrt	22:52:54	0
4357	2	88	0,2	sleep0	4359	-21	uptime	21:22:24	0
13857	2	86	0,1	sleep0	13858	-21	chrt	23:15:02	0
17591	2	85	0,2	sleep0	17590	-21	sed	21:42:22	0
21740	2	84	0,2	sleep0	21741	-21	seq	00:15:30	0
4154	2	83	0,1	sleep0	4157	-21	base64	23:00:20	0
19269	2	82	0,2	sleep0	19268	-21	grep	21:45:35	0
14915	2	80	0,2	sleep0	14916	-21	chrt	19:05:17	0
18423	2	78	0,2	sleep0	18424	-21	ls	20:01:28	0
9329	2	77	0,2	sleep0	9330	-21	chrt	23:07:22	0
7590	2	77	0,2	sleep0	7593	-21	wc	20:36:25	0
4622	2	76	0,2	sleep0	4623	-21	chrt	22:11:51	0
30295	2	76	0,2	sleep0	30296	-21	cut	20:20:51	0
4914	2	74	0,2	sleep0	4916	-21	latency_hist	23:50:04	0
16557	2	74	0,2	sleep0	16559	-21	cut	22:30:31	0
29088	2	73	0,2	sleep0	29089	-21	cron	20:20:00	0
9825	2	72	0,2	sleep0	9826	-21	chrt	22:20:18	0
21032	2	71	0,1	sleep0	21033	-21	gcc	22:36:27	0
18653	2	71	0,2	sleep0	18656	-21	sed	23:21:11	0
11385	2	71	0,2	sleep0	11386	-21	chrt	21:33:21	0
26900	2	70	0,2	sleep0	26901	-21	find	00:22:19	0
6407	2	69	0,1	sleep0	6408	-21	chrt	22:15:09	0
31446	2	66	0,1	sleep0	31447	-21	fschecks_time	23:40:54	0
28878	2	66	0,1	sleep0	28879	-21	chrt	00:25:53	0
19942	2	61	0,2	sleep0	19943	-21	seq	20:05:06	0
13488	2	61	0,2	sleep0	13490	-21	sendmail_mailtr	00:02:17	0
25979	2	60	0,2	sleep0	25980	-21	seq	22:44:31	0
29454	2	59	0,1	sleep0	29455	-21	ssh	22:49:53	0
3374	2	55	0,2	sleep0	3376	-21	seq	00:36:24	0
30072	2	55	0,2	sleep0	30073	-21	chrt	22:01:13	0
10225	2	55	0,2	sleep0	10226	-21	sh	23:57:22	0
27359	2	54	0,2	sleep0	27361	-21	grep	21:57:14	0
19543	2	54	4,42	sleep0	19547	-21	python3	19:11:30	0
30580	2	53	6,37	sleep0	30626	-21	tr	23:40:01	0
30082	2	53	0,2	sleep0	30083	-21	seq	21:12:42	0
2064	2	52	4,7	sleep0	2037	-21	ssh	22:56:49	0
15066	2	52	2,41	sleep0	15068	-21	ssh	00:05:26	0
23109	2	49	3,35	sleep0	23071	-21	apt-get	20:10:18	0
31739	2	48	0,1	sleep0	31740	-21	chrt	19:30:55	0
19723	2	47	0,3	chrt	19726	-21	runrttasks	00:11:41	0
21730	2	44	0,2	sleep0	21731	-21	chrt	21:00:14	0
17894	90	44	6,18	cyclictest	13689	-21	ntpq	20:46:20	0
17894	90	44	6,10	cyclictest	13828	-21	apt-get	23:15:40	0
10121	2	44	0,1	sleep0	10125	-21	cut	20:40:43	0
6742	2	43	2,34	sleep0	6747	-21	sshd	19:43:19	0
11823	2	43	0,3	sleep0	11824	-21	collect2	19:51:05	0
17894	90	42	5,11	cyclictest	25170	-21	diskstats	21:05:32	0
17894	90	41	6,28	cyclictest	25864	-21	ps	19:21:23	0
17894	90	40	15,19	cyclictest	19831	-21	ntp_states	20:56:12	0
17894	90	39	11,10	cyclictest	0	-21	swapper	20:27:13	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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