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 376 highest latencies:

System rackfslot4s.osadl.org (updated Sun Jan 11, 2026 12:44:35)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
18911	2	116	0,2	chrt	18901	-21	ssh	11:38:17	0
16603	2	116	0,2	chrt	16598	-21	df_inode	12:25:42	0
30591	2	115	0,2	sleep0	30624	-21	cut	09:31:07	0
29565	2	115	0,2	sleep0	29566	-21	chrt	10:17:18	0
7455	2	114	0,3	chrt	7454	-21	apt-config	09:45:13	0
32676	2	114	0,2	chrt	32674	-21	ntpq	07:51:04	0
17327	2	114	0,2	sleep0	17329	-21	cut	09:11:12	0
9917	2	113	0,2	chrt	9918	-21	runrttasks	12:13:47	0
24537	2	113	0,2	chrt	24534	-21	ntpq	11:46:34	0
2059	2	113	0,2	sleep0	2061	-21	sort	10:25:04	0
29425	2	112	0,2	chrt	29426	-21	runrttasks	09:29:41	0
31936	2	110	0,1	sleep0	31937	-21	runrttasks	11:09:31	0
13011	2	110	0,2	sleep0	13009	-21	df_inode	07:20:28	0
9646	2	109	0,2	chrt	9647	-21	sleep	08:06:12	0
2114	2	109	0,3	chrt	2115	-21	chrt	10:25:10	0
18570	2	109	0,3	chrt	18571	-21	sleep	10:49:43	0
26601	2	107	0,1	sleep0	26603	-21	cut	11:01:06	0
15350	2	107	0,2	chrt	15351	-21	sleep	10:44:56	0
3917	2	105	0,2	chrt	3919	-21	cat	09:40:06	0
25963	2	104	0,2	chrt	25964	-21	runrttasks	09:24:25	0
2080	2	104	0,2	chrt	2081	-21	sleep	11:12:47	0
19532	2	104	0,1	sleep0	19535	-21	seq	12:30:18	0
14960	2	104	0,3	chrt	14961	-21	sleep	09:06:40	0
22344	2	103	0,2	sleep0	22345	-21	seq	11:43:32	0
20591	2	100	0,3	sleep0	20592	-21	seq	10:04:36	0
29976	2	94	0,2	sleep0	29978	-21	cut	11:55:33	0
23051	2	91	0,3	sleep0	23052	-21	seq	07:35:59	0
15031	2	88	0,2	sleep0	15032	-21	runrttasks	12:22:45	0
23949	2	85	0,2	sleep0	23950	-21	runrttasks	08:30:15	0
8282	2	84	0,2	sleep0	8284	-21	sort	08:05:03	0
29611	2	81	0,3	chrt	29593	-21	ntpq	07:46:07	0
22836	2	80	0,1	sleep0	22838	-21	cut	10:55:55	0
6293	90	76	4,11	cyclictest	9577	-21	hddtemp_smartct	10:35:58	0
17566	2	75	0,3	sleep0	17568	-21	sendmail-msp	08:20:01	0
12448	2	75	0,2	sleep0	12449	-21	seq	11:28:42	0
8335	2	74	0,2	sleep0	8336	-21	ps	11:22:14	0
15118	2	74	0,1	sleep0	15116	-21	if_eth0	09:56:06	0
6293	90	73	6,11	cyclictest	24091	-21	apt-get	10:10:55	0
6293	90	73	5,20	cyclictest	412	-21	snmpd	09:15:25	0
11817	2	73	0,2	sleep0	11818	-21	fschecks_time	09:51:26	0
6293	90	72	4,11	cyclictest	5261	-21	apt-get	10:31:01	0
6293	90	71	5,11	cyclictest	27063	-21	perl	11:50:52	0
6293	90	70	6,11	cyclictest	25440	-21	sleep	07:40:31	0
3310	2	70	0,2	sleep0	3311	-21	chrt	07:05:14	0
6293	90	69	6,13	cyclictest	3727	-21	apt	08:50:00	0
6293	90	69	5,8	cyclictest	12809	-21	ntpq	08:11:20	0
16837	2	69	0,2	sleep0	16838	-21	chrt	07:25:54	0
6293	90	68	5,11	cyclictest	7366	-21	df_inode	08:55:31	0
6293	90	68	5,11	cyclictest	22491	-21	users	08:26:32	0
6293	90	68	5,11	cyclictest	21439	-21	diskstats	10:05:48	0
22825	2	68	0,2	sleep0	22826	-21	chrt	12:35:15	0
6293	90	67	6,10	cyclictest	4774	-21	ntpq	11:16:56	0
6293	90	67	6,10	cyclictest	4247	-21	df_inode	08:50:30	0
6293	90	67	6,10	cyclictest	31325	-21	ntpq	08:41:04	0
6293	90	66	6,21	cyclictest	19374	-21	ssh	10:50:51	0
6293	90	66	5,9	cyclictest	19390	-21	fw_packets	07:30:37	0
6293	90	66	5,11	cyclictest	7799	-21	ntpq	07:11:26	0
6293	90	66	17,16	cyclictest	0	-21	swapper	12:17:41	0
6293	90	65	6,10	cyclictest	2081	-21	ntpq	12:01:39	0
6293	90	65	4,11	cyclictest	5171	-21	memory	09:41:16	0
6293	90	65	4,11	cyclictest	11478	-21	gcc	09:01:21	0
6293	90	65	4,10	cyclictest	10082	-21	hddtemp_smartct	07:15:43	0
6293	90	65	3,11	cyclictest	7159	-21	ssh	12:10:03	0
6293	90	64	5,10	cyclictest	14566	-21	ntpq	11:31:34	0
6293	90	64	4,11	cyclictest	28102	-21	ntpq	08:35:56	0
20627	2	56	0,2	sleep0	20658	-21	runrttasks	08:25:01	0
2702	2	52	0,2	sleep0	2703	-21	seq	07:55:41	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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