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 May 30, 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
22801	2	203	0,1	sleep0	22802	-21	cut	19:05:32	0
14251	2	121	0,2	chrt	14249	-21	/usr/sbin/munin	20:35:41	0
26163	2	120	0,2	chrt	26037	-21	/usr/sbin/munin	20:55:24	0
2587	2	119	0,2	chrt	2588	-21	sleep	21:56:38	0
25410	2	118	0,2	chrt	25406	-21	sendmail-msp	23:20:02	0
16678	2	117	0,2	chrt	16679	-21	/usr/sbin/munin	19:47:13	0
16794	2	116	0,2	sleep0	16795	-21	chrt	22:18:04	0
12851	2	116	0,2	chrt	12849	-21	ssh	21:23:47	0
10537	2	115	0,2	sleep0	10536	-21	seq	22:08:58	0
24380	2	114	0,2	chrt	24381	-21	sleep	20:00:18	0
31944	2	111	0,2	chrt	31946	-21	runrttasks	20:11:24	0
4491	2	110	0,2	chrt	4492	-21	sleep	00:25:45	0
25906	2	110	0,3	chrt	25909	-21	sed	22:31:24	0
16111	2	110	0,2	sleep0	16114	-21	fschecks_count	23:05:53	0
10235	2	110	0,1	sleep0	10236	-21	collect2	22:56:27	0
29793	2	109	0,3	chrt	29795	-21	sleep	21:49:11	0
13180	2	108	0,3	chrt	13181	-21	aten2.4_rfpower	23:50:31	0
4928	2	107	0,2	chrt	4929	-21	sh	21:11:57	0
25171	2	104	0,3	chrt	25172	-21	sleep	20:53:07	0
28490	2	92	0,2	sleep0	28491	-21	seq	20:05:54	0
4038	2	91	0,2	sleep0	4041	-21	sed	23:36:05	0
26810	2	91	0,2	sleep0	26811	-21	chrt	21:44:59	0
2824	2	89	0,2	sleep0	2825	-21	seq	19:25:34	0
15293	2	89	0,2	sleep0	15292	-21	seq	21:27:09	0
20496	2	86	0,2	chrt	20366	-21	apt-get	21:35:33	0
4958	2	85	0,2	sleep0	4956	-21	if_eth0	20:20:41	0
21848	2	84	0,2	sleep0	21849	-21	chrt	23:14:36	0
9915	2	83	0,2	sleep0	9917	-21	cut	23:45:33	0
3980	2	83	0,2	chrt	3954	-21	ntpq	22:47:20	0
28126	2	82	0,2	sleep0	28127	-21	awk	00:12:17	0
19294	2	82	0,1	sleep0	19295	-21	sh	23:59:35	0
22100	2	81	0,2	sleep0	22101	-21	seq	00:03:17	0
8692	2	79	0,2	sleep0	8693	-21	basename	19:35:24	0
12837	2	76	0,2	sleep0	12838	-21	seq	22:12:09	0
29207	2	75	0,2	sleep0	29208	-21	ntpq	22:36:23	0
31634	2	74	0,2	sleep0	31635	-21	cat	19:20:10	0
8631	2	68	0,1	sleep0	8632	-21	seq	20:26:07	0
21886	2	68	0,2	sleep0	21887	-21	sh	22:25:59	0
1915	2	68	0,2	sleep0	1917	-21	irqrtprio	20:15:42	0
6172	2	63	0,1	sleep0	6175	-21	uniq	22:50:50	0
18840	2	61	0,2	sleep0	18842	-21	cut	19:50:44	0
939	2	58	4,7	sleep0	942	-21	seq	00:20:41	0
20150	2	58	3,46	sleep0	20178	-21	awk	21:35:01	0
29100	2	56	0,1	sleep0	29105	-21	sed	19:15:42	0
13958	2	56	0,1	sleep0	13959	-21	cat	00:40:06	0
9110	2	53	3,42	sleep0	9148	-21	grep	00:32:13	0
1618	2	53	0,2	sleep0	1619	-21	seq	23:32:17	0
10575	2	52	3,9	sleep0	10581	-21	runrttasks	20:30:22	0
7177	2	51	3,8	sleep0	7161	-21	ssh	21:15:47	0
1567	2	51	4,39	sleep0	1573	-21	ntpq	21:06:43	0
8762	2	50	0,2	sleep0	8761	-21	seq	23:43:09	0
25793	2	48	0,3	chrt	25794	-21	aten2.4_rfpower	23:20:33	0
13922	2	48	5,34	sleep0	13911	-21	ntpq	23:02:08	0
25139	90	47	5,12	cyclictest	30063	-21	df_inode	00:15:40	0
25139	90	47	18,10	cyclictest	26347	-21	/usr/sbin/munin	19:10:55	0
24580	2	46	0,3	chrt	24581	-21	runrttasks	00:06:57	0
22298	2	46	2,35	sleep0	22292	-21	ntpq	19:55:58	0
25139	90	45	17,21	cyclictest	0	-21	swapper	22:43:15	0
25139	90	45	16,22	cyclictest	0	-21	swapper	21:54:02	0
25139	90	45	13,23	cyclictest	0	-21	swapper	23:28:52	0
20173	2	44	3,32	sleep0	20179	-21	df_inode	20:45:30	0
25139	90	43	6,18	cyclictest	6704	-21	ntp_states	19:31:11	0
25139	90	43	14,21	cyclictest	0	-21	swapper	22:04:00	0
19447	2	43	4,32	sleep0	19431	-21	ntp_states	22:22:03	0
25139	90	42	17,18	cyclictest	29388	-21	apt-get	21:00:46	0
25139	90	40	15,17	cyclictest	12830	-21	ntpq	19:41:00	0
18882	2	40	0,2	chrt	18883	-21	sh	20:42:53	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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