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 100 highest latencies:

System rackfslot4s.osadl.org (updated Fri Jan 02, 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
19356	2	125	0,3	chrt	19357	-21	latency_hist	00:30:03	0
30870	2	124	0,3	chrt	30862	-21	python3	23:58:13	0
14757	2	123	0,3	chrt	14759	-21	cut	20:15:45	0
19112	2	122	0,3	chrt	19110	-21	sshd	21:15:26	0
1202	2	120	0,2	chrt	1198	-21	ntpq	20:45:56	0
18817	2	119	0,3	chrt	18818	-21	/usr/sbin/munin	19:31:30	0
7903	2	117	0,3	chrt	7904	-21	cpu	22:35:39	0
6078	2	117	0,2	chrt	6077	-21	seq	22:32:19	0
31714	2	116	0,2	sleep0	31715	-21	runrttasks	22:22:10	0
30939	2	116	0,3	chrt	30631	-21	apt-get	19:51:07	0
27601	2	115	0,2	chrt	27517	-21	apt-get	23:05:27	0
24144	2	113	0,1	sleep0	24145	-21	chrt	23:00:07	0
20781	2	113	0,2	chrt	20782	-21	runrttasks	00:31:26	0
30254	2	112	0,3	chrt	30255	-21	http	19:50:04	0
24319	2	112	0,3	chrt	24320	-21	sh	21:22:29	0
29489	2	111	0,2	chrt	29490	-21	runrttasks	20:40:14	0
6393	2	110	0,1	sleep0	6394	-21	aten2.4_rfpower	00:10:33	0
3387	2	110	0,2	chrt	3388	-21	sleep	22:28:32	0
24557	2	109	0,2	sleep0	24556	-21	ld	20:31:18	0
13752	2	109	0,1	sleep0	13753	-21	chrt	22:44:27	0
5025	2	108	0,2	chrt	5026	-21	runrttasks	00:07:49	0
28670	2	107	0,2	chrt	28671	-21	seq	21:29:14	0
2434	2	107	0,2	chrt	2436	-21	sleep	19:56:04	0
6228	2	106	0,2	chrt	6229	-21	chrt	20:55:03	0
29460	2	103	0,3	chrt	29461	-21	runrttasks	22:19:11	0
26333	2	102	0,3	chrt	26334	-21	sh	19:42:51	0
18894	2	98	0,2	sleep0	18895	-21	seq	22:51:37	0
11102	2	96	0,2	sleep0	11103	-21	rm	00:17:04	0
24816	2	94	0,2	sleep0	24815	-21	seq	22:11:45	0
13877	2	92	0,1	sleep0	13878	-21	seq	21:06:21	0
22680	2	91	0,2	sleep0	22684	-21	sed	23:46:04	0
13969	2	88	0,2	sleep0	13970	-21	chrt	21:55:52	0
7772	2	82	0,2	sleep0	7773	-21	chrt	20:05:21	0
22504	2	78	0,2	sleep0	22505	-21	chrt	22:08:27	0
18829	2	78	0,2	sleep0	18831	-21	awk	23:40:36	0
1259	2	75	0,2	sleep0	1261	-21	seq	23:14:29	0
26791	2	74	0,1	sleep0	26792	-21	collect2	23:52:06	0
31283	2	70	0,2	sleep0	31284	-21	chrt	21:32:32	0
1840	2	69	0,1	sleep0	1842	-21	processes	21:37:16	0
20194	2	64	0,2	sleep0	20195	-21	seq	20:25:19	0
10011	2	61	0,2	sleep0	10012	-21	seq	23:26:48	0
26426	2	59	0,2	sleep0	26433	-21	chrt	20:35:26	0
17892	2	59	2,6	sleep0	17885	-21	ssh	23:39:05	0
11977	2	57	3,6	sleep0	11987	-21	ntpq	20:11:04	0
5075	2	55	3,42	sleep0	4833	-21	apt-get	23:20:11	0
15792	2	55	0,3	sleep0	15794	-21	seq	21:10:32	0
3363	2	54	3,43	sleep0	3370	-21	ntpq	23:17:11	0
6207	2	52	0,3	chrt	6204	-21	/usr/sbin/munin	19:10:45	0
14674	2	52	3,39	sleep0	14675	-21	diskstats	22:45:50	0
20942	2	51	0,2	sleep0	20943	-21	runrttasks	22:55:28	0
12434	2	51	0,2	sleep0	12446	-21	fschecks_time	23:30:53	0
10456	2	51	3,7	sleep0	10457	-21	df	21:50:39	0
2197	2	50	0,1	sleep0	2198	-21	seq	19:05:14	0
14676	2	49	3,37	sleep0	14680	-21	seq	19:25:16	0
8712	2	47	0,3	sleep0	8668	-21	sshd	19:15:25	0
5182	90	47	18,22	cyclictest	0	-21	swapper	21:48:56	0
4668	2	47	3,35	sleep0	4193	-21	apt-get	20:00:21	0
31961	2	47	2,6	sleep0	31967	-21	ssh	00:00:12	0
18221	2	46	2,37	sleep0	18218	-21	ssh	22:01:48	0
12834	2	46	3,33	sleep0	12836	-21	apt-get	00:20:14	0
5182	90	45	17,21	cyclictest	0	-21	swapper	21:43:59	0
5182	90	45	17,21	cyclictest	0	-21	swapper	00:39:53	0
5182	90	44	6,10	cyclictest	10614	-21	ntpq	21:01:06	0
18220	2	44	3,34	sleep0	18222	-21	ntpq	20:21:06	0
5182	90	43	5,9	cyclictest	7593	-21	ntpq	20:56:14	0
5182	90	41	5,9	cyclictest	12713	-21	ntpq	19:21:03	0
5182	90	41	19,15	cyclictest	0	-21	swapper	19:35:25	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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