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 Aug 16, 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
28572	2	133	0,2	sleep0	28573	-21	seq	23:29:12	0
10175	2	120	0,2	chrt	10176	-21	aten2.4-expect	23:50:34	0
32089	2	117	0,3	chrt	32091	-21	runrttasks	23:34:42	0
24642	2	116	0,1	sleep0	24641	-21	seq	23:22:44	0
5780	2	115	0,1	sleep0	5781	-21	chrt	22:55:06	0
20450	2	115	0,3	chrt	20449	-21	apt-get	21:40:11	0
7322	2	114	0,2	chrt	7323	-21	if_can0	23:45:59	0
31472	2	114	0,2	chrt	31475	-21	munin-plugin-st	22:44:59	0
7336	2	113	0,2	sleep0	7337	-21	latency_hist	00:35:04	0
22981	2	112	0,2	chrt	22982	-21	sleep	20:02:19	0
6940	2	111	0,3	chrt	6941	-21	modprobe	19:36:49	0
18934	2	111	0,3	chrt	18935	-21	seq	00:03:09	0
14068	2	111	0,3	chrt	14069	-21	awk	21:30:36	0
9470	2	110	0,1	sleep0	9472	-21	seq	21:23:17	0
26441	2	110	0,2	chrt	26442	-21	seq	21:48:50	0
29633	2	108	0,2	sleep0	29635	-21	timerwakeupswit	20:12:19	0
18055	2	107	0,3	chrt	18056	-21	date	22:25:04	0
17244	2	106	0,2	chrt	17245	-21	sleep	19:53:32	0
6688	2	105	0,3	chrt	6689	-21	sh	21:19:40	0
32146	2	105	0,2	chrt	32147	-21	if_err_can0	19:25:40	0
4468	2	103	0,2	chrt	4469	-21	sleep	19:33:10	0
20402	2	100	0,2	sleep0	20403	-21	chrt	23:16:26	0
10605	2	99	0,2	sleep0	10607	-21	wc	00:40:04	0
7791	2	94	0,2	sleep0	7793	-21	chrt	20:30:23	0
8719	2	91	0,2	sleep0	8720	-21	chrt	22:10:56	0
27415	2	91	0,2	sleep0	27416	-21	rm	21:50:34	0
17503	2	91	0,2	sleep0	17504	-21	tune2fs	20:45:37	0
2264	2	87	0,2	sleep0	2265	-21	grep	21:12:28	0
26890	2	86	0,2	sleep0	26891	-21	seq	22:37:33	0
24313	2	85	0,1	sleep0	24315	-21	grep	00:11:12	0
29112	2	82	0,2	sleep0	29110	-21	if_eth0	19:20:41	0
19334	2	82	0,2	sleep0	19332	-21	awk	19:56:24	0
14501	2	81	0,2	sleep0	14500	-21	seq	23:56:21	0
16745	2	78	0,2	sleep0	16748	-21	sed	23:11:06	0
12047	2	78	0,1	sleep0	12049	-21	seq	21:27:05	0
21884	90	75	41,24	cyclictest	30483	-21	apt-get	21:55:16	0
3566	2	74	0,2	sleep0	3565	-21	awk	23:40:35	0
21884	90	69	38,22	cyclictest	15556	-21	users	20:41:28	0
21884	90	69	38,12	cyclictest	23246	-21	ntpq	19:11:10	0
21884	90	69	36,24	cyclictest	23785	-21	runrttasks	20:56:08	0
21884	90	69	36,14	cyclictest	30012	-21	df_inode	21:05:29	0
21884	90	68	35,23	cyclictest	18633	-21	ssh	21:36:57	0
21884	90	67	35,23	cyclictest	19371	-21	ssh	22:26:26	0
21884	90	67	35,22	cyclictest	9175	-21	seq	23:00:12	0
21884	90	67	34,23	cyclictest	27176	-21	ssh	00:15:56	0
21884	90	67	33,23	cyclictest	31233	-21	ssh	00:21:29	0
21884	90	66	40,15	cyclictest	25351	-21	apt-get	19:16:12	0
21884	90	66	37,21	cyclictest	5765	-21	latency_hist	22:55:05	0
21884	90	66	35,21	cyclictest	32501	-21	ssh	23:35:26	0
21884	90	66	35,15	cyclictest	20565	-21	hddtemp_smartct	00:05:57	0
21884	90	66	32,24	cyclictest	21904	-21	df_inode	22:30:43	0
21884	90	65	42,15	cyclictest	1406	-21	hddtemp_smartct	00:25:53	0
21884	90	65	35,22	cyclictest	24823	-21	fschecks_count	20:05:34	0
21884	90	65	34,22	cyclictest	1935	-21	ssh	22:01:00	0
21884	90	65	33,23	cyclictest	9709	-21	ntpq	19:40:54	0
21884	90	65	33,22	cyclictest	4617	-21	/usr/sbin/munin	20:25:29	0
21884	90	64	41,14	cyclictest	633	-21	ntpq	22:46:42	0
21884	90	64	35,20	cyclictest	2373	-21	sed	20:20:43	0
21884	90	64	33,13	cyclictest	412	-21	snmpd	22:06:13	0
21884	90	64	31,13	cyclictest	11833	-21	ntpq	20:35:53	0
21884	90	64	30,15	cyclictest	12901	-21	df	23:05:42	0
21884	90	63	38,16	cyclictest	11415	-21	apt-get	22:15:19	0
21884	90	63	35,21	cyclictest	27560	-21	irqstats	21:01:03	0
21884	90	62	33,20	cyclictest	32052	-21	ntpq	20:16:10	0
21884	90	62	32,21	cyclictest	20595	-21	perl	20:50:34	0
21884	90	61	31,21	cyclictest	12794	-21	seq	19:45:52	0
21884	90	52	32,13	cyclictest	21917	-21	grep	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