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 Mon Aug 17, 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
25187	2	130	0,3	chrt	23872	-21	apt-get	22:06:42	0
3889	2	124	0,2	chrt	3891	-21	latency_hist	20:45:00	0
16258	2	123	0,2	chrt	16259	-21	if_eth0	22:41:45	0
4799	2	121	0,2	chrt	4795	-21	ntpq	00:01:38	0
3224	2	121	0,4	chrt	3227	-21	fschecks_time	23:10:54	0
22952	2	121	0,2	chrt	22953	-21	seq	19:30:43	0
26990	2	117	0,2	sleep0	27044	-21	awk	00:35:38	0
18153	2	117	0,3	chrt	17388	-21	/usr/sbin/munin	21:56:00	0
10402	2	117	0,2	chrt	10403	-21	sleep	22:32:26	0
9881	2	115	0,2	sleep0	9883	-21	fschecks_time	23:20:51	0
21348	2	113	0,2	chrt	21344	-21	ld	00:26:30	0
13057	2	113	0,2	chrt	13058	-21	runrttasks	21:48:02	0
5496	2	112	0,3	chrt	5497	-21	chrt	19:55:24	0
1625	2	111	0,2	chrt	1626	-21	seq	22:20:05	0
32343	2	110	0,2	sleep0	32344	-21	chrt	21:28:41	0
29356	2	110	0,2	chrt	29355	-21	wc	19:40:50	0
17652	2	110	0,2	chrt	17656	-21	sleep	00:21:07	0
12849	2	109	0,2	chrt	12851	-21	awk	20:06:08	0
8617	2	108	0,3	chrt	8618	-21	seq	20:00:22	0
4954	2	108	0,2	chrt	4955	-21	cut	22:25:04	0
7153	2	107	0,3	chrt	7154	-21	chrt	21:39:50	0
22192	2	107	0,2	sleep0	22191	-21	ld	20:21:07	0
15418	2	107	0,1	sleep0	15419	-21	chrt	23:29:16	0
26088	2	105	0,2	chrt	26089	-21	sh	00:34:08	0
23498	2	105	0,2	chrt	23499	-21	sleep	22:04:09	0
14516	2	104	0,2	chrt	14519	-21	missed_timers	00:16:14	0
6498	2	98	0,2	sleep0	6500	-21	grep	23:15:53	0
32522	2	97	0,3	chrt	32523	-21	sh	20:38:07	0
21454	2	96	0,2	sleep0	21455	-21	chrt	22:49:38	0
7708	2	93	0,2	sleep0	7712	-21	sed	00:06:07	0
26475	2	92	0,1	sleep0	26478	-21	fschecks_time	23:45:50	0
1088	2	92	0,2	sleep0	1091	-21	cut	23:56:08	0
17864	2	90	0,1	sleep0	17865	-21	seq	20:15:13	0
16174	2	90	0,2	sleep0	16175	-21	chrt	19:20:26	0
1126	2	85	0,2	sleep0	1125	-21	grep	19:47:21	0
14690	2	83	0,2	sleep0	14689	-21	grep	21:50:54	0
28174	2	79	0,1	sleep0	28175	-21	munin-plugin-st	19:40:00	0
32003	2	78	0,1	sleep0	32004	-21	seq	23:54:15	0
28203	2	78	0,2	sleep0	28206	-21	wc	21:22:13	0
29026	2	77	0,3	sleep0	29028	-21	tune2fs	23:00:53	0
21474	2	76	0,1	sleep0	21475	-21	processes	21:12:29	0
13449	2	76	0,2	sleep0	13450	-21	chrt	21:00:20	0
757	2	73	0,2	sleep0	758	-21	collect2	23:06:42	0
5818	2	67	0,2	sleep0	5819	-21	if_can0	22:26:10	0
12319	2	67	0,2	sleep0	12320	-21	seq	19:14:11	0
30248	2	65	0,1	sleep0	30249	-21	seq	22:14:04	0
20678	2	63	0,2	sleep0	20676	-21	ls	19:26:30	0
4386	2	61	0,1	sleep0	4387	-21	seq	20:45:27	0
2362	2	59	0,2	sleep0	2363	-21	seq	19:50:18	0
17444	2	58	0,2	sleep0	17447	-21	grep	23:31:51	0
7527	2	54	0,2	sleep0	7528	-21	chrt	20:50:31	0
9574	90	53	19,25	cyclictest	0	-21	swapper	22:39:35	0
9574	90	52	34,12	cyclictest	23712	-21	ssh	21:16:03	0
25899	2	52	0,2	sleep0	25944	-21	if_eth2	22:56:05	0
9574	90	50	20,22	cyclictest	0	-21	swapper	23:44:37	0
9574	90	50	19,22	cyclictest	0	-21	swapper	21:33:29	0
9574	90	48	27,14	cyclictest	0	-21	swapper	21:44:03	0
9574	90	48	25,15	cyclictest	0	-21	swapper	23:37:37	0
7572	2	48	10,22	sleep0	7582	-21	ntpq	19:05:43	0
9574	90	46	26,13	cyclictest	23981	-21	ssh	22:52:46	0
10281	2	46	0,2	chrt	10282	-21	aten2.4_rfpower	00:10:35	0
9574	90	45	6,10	cyclictest	27554	-21	df_inode	20:30:33	0
9574	90	44	6,19	cyclictest	25357	-21	ntpq	20:26:14	0
9574	90	44	4,19	cyclictest	14289	-21	python3	19:16:23	0
9574	90	43	4,18	cyclictest	11634	-21	/usr/sbin/munin	20:56:23	0
9574	90	41	13,20	cyclictest	15210	-21	fschecks_time	20:10:37	0
9574	90	40	6,25	cyclictest	16590	-21	aten2.4-expect	21:05:23	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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