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 Thu Jun 25, 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
12583	2	124	0,2	chrt	12584	-21	irqrtprio	22:41:52	0
8600	2	123	0,2	chrt	8599	-21	sed	22:36:05	0
19321	2	122	0,2	chrt	19320	-21	seq	00:29:49	0
15813	2	118	0,4	chrt	15800	-21	ntpq	22:46:22	0
11946	2	118	0,2	chrt	11924	-21	ntpq	21:52:07	0
3738	2	116	0,2	chrt	3739	-21	/usr/sbin/munin	23:17:13	0
27086	2	113	0,3	chrt	27085	-21	smartctl	21:26:41	0
6589	2	112	0,2	chrt	6563	-21	ntpq	23:21:19	0
6480	2	112	0,3	chrt	6481	-21	sleep	19:10:36	0
18988	2	112	0,2	chrt	18989	-21	sleep	22:02:27	0
7220	2	111	0,1	sleep0	7221	-21	latency	00:11:10	0
5298	2	111	0,2	chrt	5299	-21	sleep	00:08:32	0
28740	2	111	0,2	sleep0	28741	-21	aten2.4_rfpower	23:55:29	0
24873	2	111	0,2	sleep0	24874	-21	sed	22:11:28	0
5174	2	110	0,2	sleep0	5175	-21	rm	22:31:02	0
32140	2	110	0,1	sleep0	32141	-21	irqrtprio	23:11:05	0
16592	2	110	0,2	chrt	16593	-21	collect2	23:36:24	0
4627	2	109	0,2	chrt	4610	-21	apt-get	20:00:14	0
23773	2	108	0,3	chrt	23774	-21	runrttasks	22:58:45	0
9958	2	105	0,2	chrt	9959	-21	sh	20:08:08	0
10840	2	103	0,2	sleep0	10841	-21	chrt	00:16:38	0
32034	2	101	0,1	sleep0	32035	-21	seq	21:33:45	0
29649	2	101	0,2	chrt	29651	-21	modprobe	20:40:04	0
28392	2	97	0,2	sleep0	28394	-21	uniq	23:05:50	0
22153	2	93	0,2	sleep0	22154	-21	basename	23:45:32	0
29767	2	92	0,1	sleep0	29769	-21	seq	22:19:25	0
1476	2	80	0,2	sleep0	1478	-21	sed	21:36:17	0
2183	2	79	0,1	sleep0	2186	-21	cut	22:26:10	0
19584	2	76	0,1	sleep0	19583	-21	seq	00:30:09	0
32113	2	75	0,2	sleep0	32115	-21	chrt	22:22:19	0
25777	2	75	0,2	sleep0	25775	-21	fschecks_count	23:50:50	0
9438	2	71	0,2	sleep0	9436	-21	if_err_eth2	23:26:01	0
25317	2	69	0,1	sleep0	25318	-21	sh	00:38:19	0
15223	2	69	0,1	sleep0	15221	-21	timerandwakeup	00:23:09	0
13754	2	69	0,2	sleep0	13755	-21	seq	20:14:29	0
1393	2	68	0,2	sleep0	1394	-21	date	19:55:03	0
2480	2	66	0,2	sleep0	2481	-21	seq	00:04:44	0
22162	2	64	0,2	sleep0	22163	-21	seq	21:19:28	0
22777	2	61	0,3	sleep0	22778	-21	chrt	19:36:13	0
20204	2	61	0,2	sleep0	20203	-21	basename	20:25:01	0
13183	2	61	0,2	sleep0	13184	-21	chrt	19:20:48	0
5844	90	60	37,15	cyclictest	19621	-21	ntpq	19:31:09	0
6069	2	58	0,3	sleep0	6068	-21	seq	21:43:21	0
5844	90	58	39,12	cyclictest	8169	-21	ntpq	21:46:19	0
9526	2	57	0,2	sleep0	9527	-21	chrt	21:00:03	0
5844	90	56	35,13	cyclictest	436	-21	runrttasks	19:27:31	0
5844	90	54	34,11	cyclictest	1478	-21	/usr/sbin/munin	19:55:50	0
18375	2	53	0,1	sleep0	18374	-21	seq	21:13:27	0
5844	90	52	33,12	cyclictest	19576	-21	open_inodes	22:52:11	0
5844	90	52	32,13	cyclictest	436	-21	runrttasks	21:20:08	0
5844	90	52	32,12	cyclictest	24852	-21	sleep	19:40:25	0
15060	2	52	0,1	sleep0	15061	-21	chrt	23:34:52	0
1294	2	51	0,2	sleep0	1297	-21	grep	20:45:49	0
11912	2	51	0,4	sleep0	11908	-21	sshd	21:03:08	0
20866	2	49	0,2	sleep0	20869	-21	seq	23:42:50	0
5844	90	48	31,11	cyclictest	26122	-21	ssh	23:02:01	0
5844	90	48	27,14	cyclictest	12768	-21	apt-get	21:05:15	0
3910	2	48	11,19	sleep0	3911	-21	ntpq	19:05:46	0
5844	90	47	30,12	cyclictest	15139	-21	ssh	21:56:55	0
5844	90	47	12,17	cyclictest	0	-21	swapper	20:36:51	0
5844	90	45	29,11	cyclictest	21395	-21	ssh	22:06:15	0
14156	2	45	0,2	chrt	14157	-21	runrttasks	20:15:14	0
5844	90	42	5,17	cyclictest	22006	-21	users	20:26:30	0
28106	2	41	0,2	sleep0	28124	-21	sort	19:45:34	0
5844	90	40	4,9	cyclictest	24714	-21	ntp_states	20:31:10	0
5844	90	40	3,10	cyclictest	10116	-21	ntpq	19:15:53	0
5844	90	39	11,20	cyclictest	0	-21	swapper	20:52:40	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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