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 Fri Mar 20, 2026 00:44:36)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
9204	2	124	0,2	chrt	9206	-21	runrttasks	22:11:17	0
20247	2	124	0,2	chrt	20243	-21	apt-config	20:50:09	0
16258	2	124	0,3	chrt	16259	-21	sh	20:43:27	0
25495	2	120	0,2	chrt	25497	-21	latency_hist	23:25:03	0
832	2	118	0,3	chrt	829	-21	aten2.4_rfpower	00:25:31	0
29048	2	118	0,3	chrt	29049	-21	/usr/sbin/munin	20:11:36	0
15736	2	118	0,2	chrt	15737	-21	/usr/sbin/munin	23:10:34	0
29922	2	117	0,3	chrt	29918	-21	ntpq	19:20:53	0
648	2	116	0,3	chrt	649	-21	runrttasks	21:58:51	0
7382	2	115	0,2	chrt	7380	-21	/usr/sbin/munin	19:36:34	0
4913	2	114	0,2	chrt	4911	-21	ssh	22:54:06	0
10045	2	113	0,2	sleep0	10046	-21	runrttasks	21:24:22	0
5395	2	112	0,1	sleep0	5397	-21	if_err_eth0	22:06:00	0
24649	2	112	0,2	sleep0	24651	-21	interrupts	21:46:04	0
9138	2	111	0,2	chrt	9137	-21	/usr/sbin/munin	20:31:27	0
30986	2	110	0,2	chrt	30987	-21	chrt	23:32:24	0
11785	2	110	0,3	chrt	11787	-21	modprobe	19:45:00	0
6954	2	109	0,2	chrt	6953	-21	seq	00:34:13	0
5796	2	108	0,3	chrt	5793	-21	sshd	22:55:35	0
19635	2	108	0,2	chrt	19634	-21	ssh	21:38:29	0
15409	2	97	0,2	sleep0	15412	-21	latency_hist	23:10:05	0
11942	2	93	0,2	sleep0	11943	-21	gcc	21:26:41	0
4277	2	89	0,2	sleep0	4278	-21	chrt	20:25:05	0
1669	2	89	0,2	sleep0	1667	-21	ssh	21:11:33	0
29376	2	86	0,2	sleep0	29377	-21	ssh	21:52:54	0
20458	2	85	10,18	sleep0	20465	-21	ntpq	19:05:54	0
4666	2	84	0,2	sleep0	4668	-21	fschecks_time	21:16:26	0
27727	2	78	0,3	sleep0	27728	-21	chrt	22:39:57	0
16398	2	77	0,1	sleep0	16399	-21	chrt	21:33:41	0
22290	90	76	5,50	cyclictest	11747	-21	seq	20:35:47	0
22290	90	76	4,61	cyclictest	31181	-21	ssh	00:21:39	0
9409	2	75	0,2	sleep0	9411	-21	grep	23:00:50	0
10924	2	75	0,2	sleep0	10927	-21	sed	23:51:10	0
6488	2	74	0,2	sleep0	6489	-21	/usr/sbin/munin	20:27:23	0
4505	2	73	0,2	sleep0	4506	-21	ld	23:41:28	0
22290	90	73	6,57	cyclictest	21303	-21	apt-get	22:30:19	0
22290	90	73	5,50	cyclictest	24425	-21	runrttasks	00:11:28	0
22290	90	73	4,58	cyclictest	22122	-21	ssh	21:42:03	0
15058	2	73	0,2	sleep0	15059	-21	chrt	19:50:13	0
31793	2	72	0,1	sleep0	31794	-21	/usr/sbin/munin	22:45:49	0
22290	90	72	7,54	cyclictest	27981	-21	apt-get	22:40:16	0
22290	90	72	6,47	cyclictest	28789	-21	munin-run	23:30:01	0
22290	90	72	5,57	cyclictest	14805	-21	ntpq	23:57:11	0
22290	90	72	5,47	cyclictest	7872	-21	ntpq	23:46:37	0
22290	90	72	4,60	cyclictest	15812	-21	ssh	22:21:12	0
22290	90	72	4,47	cyclictest	18327	-21	ntpq	20:46:20	0
22290	90	71	6,55	cyclictest	1353	-21	apt-get	22:00:20	0
22290	90	71	6,45	cyclictest	16893	-21	df	00:00:40	0
22290	90	71	5,57	cyclictest	19464	-21	sleep	23:15:56	0
22290	90	71	5,47	cyclictest	26876	-21	df	21:00:27	0
22290	90	71	5,46	cyclictest	25835	-21	chrt	19:15:26	0
22290	90	71	4,58	cyclictest	3086	-21	perl	19:30:33	0
22290	90	71	4,57	cyclictest	18428	-21	seq	22:25:42	0
22290	90	71	4,57	cyclictest	1049	-21	python3	19:26:30	0
22290	90	70	6,44	cyclictest	24706	-21	ntpq	20:56:23	0
22290	90	70	5,46	cyclictest	1199	-21	ntpq	23:36:33	0
22290	90	70	5,45	cyclictest	26011	-21	users	20:06:28	0
22290	90	70	4,57	cyclictest	11944	-21	apt-get	19:45:14	0
11278	2	70	0,2	sleep0	11279	-21	chrt	22:15:06	0
22290	90	69	7,51	cyclictest	18143	-21	apt-get	19:55:15	0
22290	90	69	6,54	cyclictest	27919	-21	ntpq	00:16:48	0
22290	90	68	4,53	cyclictest	22420	-21	apt-get	19:10:19	0
22290	90	68	4,53	cyclictest	21772	-21	/usr/sbin/munin	00:07:20	0
22290	90	67	7,40	cyclictest	8119	-21	fw_packets	00:35:55	0
22290	90	67	6,52	cyclictest	32151	-21	seq	20:16:37	0
22290	90	67	3,47	cyclictest	24215	-21	munin-run	20:05:01	0
22290	90	66	6,48	cyclictest	29656	-21	apt-get	21:05:16	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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