OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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
Special All - All RT - Optimization - Ethernet - Thumbnails - Next

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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack7slot7s.osadl.org (updated Sun Dec 28, 2025 00:43:48)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
5521	2	101	67,9	sleep2	0	-21	swapper/2	19:07:28	2
5603	2	90	76,10	sleep0	0	-21	swapper/0	19:08:30	0
5413	2	80	60,9	sleep3	0	-21	swapper/3	19:06:04	3
5386	2	77	67,6	sleep1	0	-21	swapper/1	19:05:42	1
5807	99	29	1,9	cyclictest	3418	-21	apt-get	23:35:14	3
5798	99	25	0,4	cyclictest	0	-21	swapper/1	22:25:13	1
5807	99	23	0,3	cyclictest	0	-21	swapper/3	22:00:17	3
5798	99	23	1,4	cyclictest	27010	-21	grep	19:50:26	1
5798	99	22	21,1	cyclictest	0	-21	swapper/1	00:06:12	1
5803	99	21	19,1	cyclictest	0	-21	swapper/2	20:40:14	2
5803	99	21	19,1	cyclictest	0	-21	swapper/2	20:40:13	2
5794	99	21	1,14	cyclictest	0	-21	swapper/0	23:35:14	0
5798	99	20	0,1	cyclictest	0	-21	swapper/1	00:05:01	1
5794	99	20	6,7	cyclictest	18946	-21	basename	23:00:01	0
5807	99	18	9,3	cyclictest	7794	-21	sed	21:25:28	3
5807	99	18	9,3	cyclictest	32540	-21	wc	21:10:22	3
5798	99	18	1,8	cyclictest	0	-21	swapper/1	21:35:15	1
5798	99	18	16,1	cyclictest	22700	-21	awk	23:05:21	1
5807	99	17	9,2	cyclictest	22505	-21	ls	21:59:59	3
5807	99	17	10,2	cyclictest	11607	-21	cat	23:50:17	3
5803	99	17	15,1	cyclictest	13188	-21	ntp_states	20:30:24	2
5803	99	17	0,3	cyclictest	0	-21	swapper/2	23:50:13	2
5807	99	16	9,2	cyclictest	1524	-21	sed	22:20:30	3
5798	99	16	11,3	cyclictest	14323	-21	ls	21:40:19	1
5798	99	16	0,12	cyclictest	0	-21	swapper/1	21:25:15	1
5798	99	15	1,5	cyclictest	225	-21	systemd-journal	21:10:00	1
5794	99	15	6,8	cyclictest	21312	-21	munin-run	23:05:00	0
5794	99	15	6,7	cyclictest	10626	-21	sendmail-msp	19:20:01	0
5794	99	15	11,3	cyclictest	20095	-21	cron	19:40:00	0
5807	99	14	0,13	cyclictest	4354	-21	cron	22:29:59	3
5807	99	14	0,13	cyclictest	3138	-21	cron	23:35:00	3
5803	99	14	10,2	cyclictest	11270	-21	grep	20:25:29	2
5798	99	14	3,5	cyclictest	0	-21	swapper/1	21:50:16	1
5798	99	14	11,2	cyclictest	8270	-21	cat	20:20:19	1
5798	99	14	10,3	cyclictest	6798	-21	sh	22:35:00	1
5798	99	14	10,3	cyclictest	21584	-21	grep	20:50:15	1
5798	99	14	10,3	cyclictest	10161	-21	grep	19:15:28	1
5798	99	14	10,2	cyclictest	24970	-21	ls	23:10:18	1
5798	99	14	0,13	cyclictest	0	-21	swapper/1	19:40:15	1
5794	99	14	1,8	cyclictest	0	-21	swapper/0	20:30:17	0
5794	99	14	11,2	cyclictest	1666	-21	cut	23:30:17	0
5794	99	14	10,3	cyclictest	24601	-21	grep	19:45:29	0
5794	99	14	10,2	cyclictest	32729	-21	cat	21:10:25	0
5807	99	13	9,3	cyclictest	29958	-21	cat	20:00:00	3
5807	99	13	9,3	cyclictest	29942	-21	head	23:20:22	3
5807	99	13	10,2	cyclictest	9215	-21	basename	22:40:01	3
5807	99	13	10,2	cyclictest	9215	-21	basename	22:40:00	3
5807	99	13	10,2	cyclictest	8765	-21	grep	19:15:16	3
5807	99	13	10,2	cyclictest	5698	-21	seq	22:30:20	3
5807	99	13	10,2	cyclictest	32362	-21	basename	00:35:15	3
5807	99	13	10,2	cyclictest	30684	-21	grep	22:15:17	3
5807	99	13	10,2	cyclictest	26608	-21	tr	21:00:16	3
5807	99	13	10,2	cyclictest	21055	-21	cut	00:10:18	3
5807	99	13	10,2	cyclictest	20153	-21	cron	00:09:59	3
5807	99	13	10,2	cyclictest	18730	-21	grep	21:50:20	3
5807	99	13	10,2	cyclictest	17742	-21	latency_hist	21:49:59	3
5803	99	13	9,3	cyclictest	6099	-21	tr	23:40:14	2
5803	99	13	10,2	cyclictest	9246	-21	grep	19:15:19	2
5803	99	13	10,2	cyclictest	598	-21	tail	22:20:21	2
5803	99	13	10,2	cyclictest	31527	-21	grep	21:10:15	2
5803	99	13	10,2	cyclictest	26037	-21	cron	23:15:00	2
5803	99	13	10,2	cyclictest	23967	-21	wc	19:45:22	2
5803	99	13	10,2	cyclictest	23800	-21	wc	00:15:19	2
5803	99	13	10,2	cyclictest	15182	-21	sed	22:50:20	2
5803	99	13	10,2	cyclictest	0	-21	swapper/2	20:20:15	2
5803	99	13	0,12	cyclictest	16016	-21	sort	00:00:18	2
5798	99	13	9,3	cyclictest	27312	-21	cron	00:24:59	1
5798	99	13	9,2	cyclictest	5517	-21	cron	23:40:00	1
5798	99	13	9,2	cyclictest	2658	-21	wc	21:15:25	1
5798	99	13	9,2	cyclictest	12303	-21	grep	23:50:26	1
5798	99	13	8,4	cyclictest	16510	-21	cron	20:40:00	1
5798	99	13	10,2	cyclictest	9182	-21	sh	22:40:01	1
5798	99	13	10,2	cyclictest	9182	-21	sh	22:40:00	1
5798	99	13	10,2	cyclictest	8241	-21	wc	19:15:00	1
5798	99	13	10,2	cyclictest	23581	-21	sed	00:15:16	1
5798	99	13	10,2	cyclictest	20126	-21	cut	20:45:20	1
5794	99	13	9,3	cyclictest	31818	-21	grep	23:25:20	0
5794	99	13	10,2	cyclictest	9696	-21	chrt	23:45:28	0
5794	99	13	10,2	cyclictest	31120	-21	grep	22:15:21	0
5794	99	13	10,2	cyclictest	26355	-21	grep	00:20:20	0
5794	99	13	10,2	cyclictest	24938	-21	awk	00:20:00	0
5807	99	12	9,2	cyclictest	6633	-21	tail	23:40:17	3
5807	99	12	9,2	cyclictest	27403	-21	grep	23:15:21	3
5807	99	12	9,2	cyclictest	13491	-21	grep	21:40:14	3
5807	99	12	9,2	cyclictest	12999	-21	perf	21:40:00	3
5807	99	12	10,1	cyclictest	317	-21	sed	23:25:30	3
5803	99	12	9,2	cyclictest	9174	-21	sort	21:30:17	2
5803	99	12	9,2	cyclictest	6292	-21	grep	19:10:16	2
5803	99	12	9,2	cyclictest	3152	-21	grep	20:10:19	2
5803	99	12	9,2	cyclictest	29882	-21	wc	20:00:00	2
5803	99	12	9,2	cyclictest	27577	-21	wc	21:00:23	2
5803	99	12	9,2	cyclictest	27350	-21	grep	00:25:00	2
5803	99	12	9,2	cyclictest	20879	-21	head	20:45:28	2
5803	99	12	9,2	cyclictest	18729	-21	grep	21:50:20	2
5803	99	12	9,2	cyclictest	15376	-21	turbostat	21:45:00	2
5803	99	12	9,2	cyclictest	11601	-21	grep	21:35:19	2
5803	99	12	8,3	cyclictest	29258	-21	df	23:20:15	2
5803	99	12	8,2	cyclictest	22557	-21	sleep	00:15:00	2
5803	99	12	5,4	cyclictest	31	1	rcuc/2	20:55:16	2
5803	99	12	2,6	cyclictest	0	-21	swapper/2	22:35:00	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2019-05-28 - 00:17