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 Fri Aug 21, 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
18824	2	124	0,4	chrt	18826	-21	fschecks_time	21:25:55	0
10015	2	119	0,3	chrt	8136	-21	/usr/sbin/munin	21:12:27	0
21695	2	118	0,2	chrt	21694	-21	sshd	20:39:55	0
28844	2	117	0,3	chrt	28845	-21	runrttasks	22:28:50	0
23305	2	117	0,3	chrt	23307	-21	fschecks_time	22:20:51	0
16086	2	115	0,2	chrt	16073	-21	ntpq	23:46:42	0
13990	2	115	0,3	chrt	13991	-21	ssh	22:06:41	0
22403	2	114	0,2	chrt	22406	-21	fschecks_time	20:40:35	0
16523	2	114	0,2	sleep0	16524	-21	kernelversion	00:36:10	0
25995	2	113	0,3	chrt	25992	-21	kernelversion	21:36:14	0
6421	2	112	0,2	chrt	6422	-21	sleep	20:15:17	0
5737	2	110	0,2	chrt	5739	-21	sort	21:55:04	0
9580	2	109	0,2	chrt	9581	-21	chrt	20:20:21	0
15295	2	109	0,2	chrt	15296	-21	rm	21:20:40	0
6598	2	108	0,3	chrt	6599	-21	sleep	23:32:21	0
32496	2	108	0,3	chrt	32497	-21	chrt	22:34:39	0
22762	2	108	0,2	chrt	22763	-21	awk	19:50:24	0
13059	2	107	0,3	chrt	13060	-21	sleep	23:42:12	0
31305	2	106	0,3	chrt	31306	-21	sleep	00:10:17	0
16797	2	104	0,3	chrt	16798	-21	chrt	22:59:59	0
18676	2	99	0,2	sleep0	18674	-21	ls	20:35:02	0
21782	2	97	0,1	sleep0	21783	-21	ld	23:06:42	0
14122	2	96	0,2	sleep0	14121	-21	sed	00:32:24	0
10759	2	95	0,2	sleep0	10761	-21	xargs	00:27:24	0
3841	2	82	0,2	sleep0	3839	-21	ssh	22:40:28	0
31179	2	82	0,2	sleep0	31182	-21	latency_hist	20:55:03	0
3930	2	76	0,2	sleep0	3931	-21	seq	23:28:43	0
31548	2	74	0,2	sleep0	31551	-21	wc	21:45:04	0
8561	2	73	0,2	sleep0	8562	-21	seq	00:24:54	0
9397	2	72	0,1	sleep0	9398	-21	aten2.4-expect	22:00:34	0
7834	2	72	0,1	sleep0	7838	-21	irqrtprio	19:25:43	0
16373	2	71	0,2	sleep0	16375	-21	date	19:40:03	0
9710	2	70	0,2	sleep0	9711	-21	ssh	22:48:55	0
21773	2	70	0,1	sleep0	21774	-21	seq	22:18:14	0
16066	2	69	0,1	sleep0	16069	-21	base64	22:10:15	0
12167	2	66	0,2	sleep0	12168	-21	seq	19:32:17	0
27489	2	65	6,48	sleep0	27566	-21	fschecks_time	19:05:28	0
30122	90	63	31,22	cyclictest	27969	-21	/usr/sbin/munin	00:07:25	0
30122	90	63	30,22	cyclictest	28358	-21	ssh	23:16:38	0
30122	90	63	28,13	cyclictest	1920	-21	chrt	21:00:11	0
30122	90	62	34,21	cyclictest	7315	-21	runrttasks	23:38:42	0
30122	90	62	34,20	cyclictest	7468	-21	ntpq	21:57:03	0
30122	90	62	31,13	cyclictest	25092	-21	diskstats	00:00:47	0
30122	90	61	34,16	cyclictest	10364	-21	apt-get	22:50:24	0
30122	90	61	29,11	cyclictest	951	-21	ps	21:47:20	0
30122	90	60	32,20	cyclictest	30911	-21	ntpq	20:02:06	0
30122	90	60	28,14	cyclictest	22506	-21	ntpq	23:56:21	0
30122	90	60	28,13	cyclictest	14340	-21	runrttasks	21:19:17	0
30122	90	60	27,23	cyclictest	13856	-21	ntp_states	20:26:09	0
30122	90	60	27,13	cyclictest	19923	-21	diskstats	19:45:32	0
30122	90	59	30,21	cyclictest	5538	-21	grep	19:21:27	0
30122	90	59	29,20	cyclictest	376	-21	apt	22:35:10	0
30122	90	59	28,22	cyclictest	2771	-21	ssh	00:15:56	0
30122	90	59	28,22	cyclictest	19707	-21	/usr/sbin/munin	23:52:14	0
30122	90	59	27,23	cyclictest	22028	-21	diskstats	21:30:49	0
30122	90	59	27,22	cyclictest	25047	-21	seq	23:11:36	0
30122	90	58	37,12	cyclictest	31279	-21	irqrtprio	23:21:05	0
30122	90	57	38,12	cyclictest	3831	-21	runrttasks	20:10:39	0
30122	90	57	35,14	cyclictest	2010	-21	ntpq	19:15:59	0
30122	90	57	32,16	cyclictest	31253	-21	apt-get	20:55:19	0
30122	90	57	28,21	cyclictest	26609	-21	mailstats	20:46:43	0
30122	90	57	27,22	cyclictest	25585	-21	apt-get	19:55:35	0
30122	90	57	26,23	cyclictest	18652	-21	sh	23:02:02	0
30122	90	57	26,22	cyclictest	6317	-21	sleep	21:06:16	0
30122	90	57	25,13	cyclictest	30378	-21	aten2.4_rfpower	19:10:22	0
30122	90	56	35,13	cyclictest	32256	-21	apt-get	20:05:16	0
30122	90	56	26,12	cyclictest	17595	-21	ntpq	19:41:01	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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