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 Apr 04, 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
20122	2	142	0,2	sleep0	20123	-21	ld	22:21:56	0
17219	2	121	0,2	chrt	17220	-21	sleep	23:55:18	0
7590	2	118	0,3	chrt	7591	-21	/usr/sbin/munin	19:31:21	0
16518	2	115	0,2	sleep0	16519	-21	irqrtprio	22:16:50	0
31985	2	113	0,3	chrt	31986	-21	seq	00:16:47	0
14196	2	113	0,1	sleep0	14199	-21	runrttasks	21:25:39	0
31362	2	112	0,1	sleep0	31364	-21	if_err_eth1	21:51:03	0
23193	2	112	0,4	chrt	23190	-21	ps	19:56:22	0
2186	2	111	0,2	sleep0	2190	-21	ntp_kernel_pll_	23:32:15	0
11454	2	111	0,2	chrt	11456	-21	cut	21:21:08	0
32145	2	110	0,2	chrt	32147	-21	runrttasks	20:10:51	0
14938	2	109	0,2	chrt	14939	-21	apt-config	22:15:07	0
14220	2	109	0,2	chrt	14222	-21	chrt	20:35:15	0
10530	2	109	0,1	sleep0	10531	-21	chrt	00:33:31	0
7809	2	108	0,2	chrt	7813	-21	modprobe	20:25:00	0
6945	2	108	0,2	sleep0	6947	-21	if_err_eth0	22:51:01	0
11353	2	107	0,2	chrt	11354	-21	sh	00:35:09	0
2660	2	106	0,2	chrt	2659	-21	sshd	19:24:10	0
22783	2	106	0,2	sleep0	22785	-21	latency_hist	23:15:05	0
23164	2	105	0,3	chrt	23165	-21	sleep	21:38:49	0
18205	2	105	0,3	chrt	18208	-21	sed	21:31:09	0
29829	2	104	0,2	chrt	29830	-21	sleep	20:06:58	0
28618	2	104	0,2	chrt	28619	-21	sleep	20:56:50	0
10245	2	102	0,2	sleep0	10246	-21	cat	22:56:00	0
5690	2	100	0,2	chrt	5691	-21	sh	19:28:59	0
4617	2	99	0,2	sleep0	4618	-21	cat	23:36:00	0
29358	2	96	0,2	sleep0	29359	-21	seq	00:12:48	0
1556	2	92	0,2	sleep0	1558	-21	basename	00:20:33	0
25619	2	90	0,1	sleep0	25620	-21	runrttasks	23:19:10	0
25235	2	89	0,2	sleep0	25237	-21	chrt	00:06:38	0
23947	2	89	0,2	sleep0	23948	-21	chrt	20:50:46	0
19444	2	88	0,1	sleep0	19446	-21	ssh	23:10:05	0
32115	2	85	0,2	sleep0	32117	-21	head	22:40:35	0
30445	2	83	0,3	chrt	30427	-21	ntpq	19:16:16	0
21674	2	83	0,2	sleep0	21675	-21	cat	00:01:14	0
4774	2	82	0,2	sleep0	4777	-21	cut	21:11:10	0
25911	90	82	7,63	cyclictest	11738	-21	ntpq	23:46:17	0
13993	2	82	0,2	sleep0	13995	-21	cut	23:50:32	0
17864	2	80	0,3	chrt	17849	-21	hddtemp_smartct	20:40:40	0
10127	2	80	0,2	sleep0	10128	-21	seq	21:19:42	0
9490	2	78	0,2	sleep0	9488	-21	python3	20:26:24	0
25911	90	74	17,48	cyclictest	22049	-21	aten2.4_rfpower	22:25:32	0
25911	90	73	6,55	cyclictest	29516	-21	apt-get	23:25:20	0
25911	90	73	5,59	cyclictest	27630	-21	ntpq	23:21:42	0
25911	90	73	4,59	cyclictest	12961	-21	ssh	23:00:24	0
25911	90	72	5,58	cyclictest	8329	-21	ssh	22:05:29	0
25911	90	72	5,58	cyclictest	1782	-21	gcc	21:06:04	0
25911	90	72	5,46	cyclictest	4697	-21	apt	20:20:00	0
25911	90	72	4,58	cyclictest	28557	-21	sshd	22:35:15	0
25911	90	72	18,46	cyclictest	28338	-21	munin-plugin-st	22:35:00	0
25911	90	71	7,54	cyclictest	4693	-21	apt-get	00:25:20	0
25911	90	71	5,57	cyclictest	12927	-21	fschecks_time	19:40:34	0
25911	90	71	5,55	cyclictest	2554	-21	apt-get	22:46:04	0
25911	90	71	4,57	cyclictest	27230	-21	runrttasks	19:11:05	0
25911	90	71	4,48	cyclictest	12390	-21	grep	19:40:04	0
25911	90	71	18,44	cyclictest	24962	-21	ssh	21:41:10	0
25911	90	70	7,54	cyclictest	8523	-21	ntpq	23:41:30	0
25911	90	70	6,53	cyclictest	27252	-21	apt-get	21:45:20	0
25911	90	70	5,54	cyclictest	5536	-21	hddtemp_smartct	22:00:59	0
25911	90	70	4,10	cyclictest	451	-21	munin-run	21:05:03	0
25911	90	69	6,42	cyclictest	26007	-21	ntpq	20:00:58	0
25911	90	69	12,48	cyclictest	18727	-21	chrt	19:50:20	0
25911	90	68	5,45	cyclictest	11086	-21	/usr/sbin/munin	20:30:33	0
25911	90	67	6,52	cyclictest	20418	-21	apt-get	20:45:19	0
25911	90	67	5,52	cyclictest	1489	-21	apt-get	21:55:33	0
25911	90	66	11,46	cyclictest	15566	-21	/usr/sbin/munin	19:45:24	0
25911	90	64	4,11	cyclictest	25859	-21	latency_hist	19:10:03	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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