OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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.

Total number of samples: 50.5 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 792 highest latencies:

System rack5slot7s.osadl.org (updated Fri Aug 14, 2026 00:45:09)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1819	2	2452	2211,98	sleep0	0	-21	swapper	19:06:49	0
2222	99	163	32,23	cyclictest	17356	-21	apt-get	20:40:12	0
2222	99	159	38,99	cyclictest	24391	-21	df	21:20:34	0
2222	99	159	16,120	cyclictest	2394	-21	apt-get	22:26:02	0
2222	99	158	14,27	cyclictest	24165	-21	apt	21:20:02	0
2222	99	157	36,23	cyclictest	791	-21	latency_hist	22:15:03	0
2222	99	157	19,114	cyclictest	3013	-21	munin-run	19:15:03	0
2222	99	157	16,116	cyclictest	1575	-21	munin-run	22:20:02	0
2222	99	157	14,102	cyclictest	23207	-21	apt-config	21:15:08	0
2222	99	156	39,21	cyclictest	10807	-21	df_inode	20:00:31	0
2222	99	156	14,118	cyclictest	10729	-21	apt-get	23:15:21	0
2222	99	156	14,117	cyclictest	29955	-21	apt-get	21:55:19	0
2222	99	156	10,121	cyclictest	14474	-21	grep	23:36:02	0
2222	99	155	16,117	cyclictest	4215	-21	munin-run	22:35:02	0
2222	99	155	14,39	cyclictest	2396	-21	munin-run	22:25:04	0
2222	99	155	13,24	cyclictest	6237	-21	wc	19:30:53	0
2222	99	155	13,118	cyclictest	10112	-21	/usr/sbin/munin	19:55:42	0
2222	99	154	20,107	cyclictest	23815	-21	apt-get	00:35:18	0
2222	99	154	19,107	cyclictest	3563	-21	diskstats	19:15:51	0
2222	99	154	17,114	cyclictest	22467	-21	memory	00:25:53	0
2222	99	154	15,115	cyclictest	25662	-21	sort	21:26:04	0
2222	99	154	14,25	cyclictest	4803	-21	cut	22:35:58	0
2222	99	154	10,119	cyclictest	31136	-21	/usr/sbin/munin	22:00:47	0
2222	99	154	10,117	cyclictest	14943	-21	/usr/sbin/munin	20:25:31	0
2222	99	153	19,107	cyclictest	4599	-21	ntp_states	19:20:51	0
2222	99	153	18,109	cyclictest	20577	-21	apt-get	21:00:27	0
2222	99	153	16,112	cyclictest	5076	-21	/usr/sbin/munin	19:25:13	0
2222	99	153	13,22	cyclictest	13933	-21	apt-get	20:20:26	0
2222	99	152	9,22	cyclictest	16882	-21	snmpd	21:35:02	0
2222	99	152	23,29	cyclictest	12287	-21	apt-get	20:10:22	0
2222	99	152	15,21	cyclictest	9241	-21	df	23:05:27	0
2222	99	152	15,114	cyclictest	16499	-21	sort	20:35:04	0
2222	99	152	14,115	cyclictest	9039	-21	apt	23:05:00	0
2222	99	152	14,113	cyclictest	7214	-21	mailstats	22:51:00	0
2222	99	151	20,21	cyclictest	19749	-21	irqstats	00:10:40	0
2222	99	151	19,28	cyclictest	11677	-21	diskstats	23:20:35	0
2222	99	151	18,109	cyclictest	0	-21	swapper	20:16:02	0
2222	99	151	17,23	cyclictest	23128	-21	diskstats	00:30:32	0
2222	99	151	16,110	cyclictest	8286	-21	apt-get	19:45:19	0
2222	99	151	12,100	cyclictest	12782	-21	find	23:25:55	0
2222	99	150	16,22	cyclictest	27374	-21	munin-run	21:40:02	0
2222	99	150	15,96	cyclictest	9080	-21	apt-get	19:50:13	0
2222	99	150	13,40	cyclictest	18846	-21	latency_hist	20:50:01	0
2222	99	150	13,113	cyclictest	21233	-21	apt-get	00:20:31	0
2222	99	150	10,26	cyclictest	17341	-21	sort	20:40:07	0
2222	99	150	10,115	cyclictest	10229	-21	awk	23:10:48	0
2222	99	149	20,28	cyclictest	5931	-21	apt-get	22:45:21	0
2222	99	149	20,28	cyclictest	18081	-21	df	00:00:28	0
2222	99	149	15,110	cyclictest	21081	-21	munin-run	00:20:01	0
2222	99	149	13,113	cyclictest	20182	-21	awk	20:55:55	0
2222	99	149	12,97	cyclictest	5775	-21	sed	22:41:04	0
2222	99	148	9,117	cyclictest	11557	-21	cstates	20:05:19	0
2222	99	148	28,96	cyclictest	28652	-21	wc	21:45:55	0
2222	99	148	17,25	cyclictest	6769	-21	df	19:35:26	0
2222	99	148	17,22	cyclictest	16472	-21	diskstats	23:50:31	0
2222	99	148	17,21	cyclictest	0	-21	swapper	22:05:43	0
2222	99	148	14,25	cyclictest	248	-21	rs:main		0
2222	99	148	12,25	cyclictest	14772	-21	apt-get	23:40:19	0
2222	99	147	19,26	cyclictest	7602	-21	diskstats	19:40:33	0
2222	99	147	15,23	cyclictest	15741	-21	irqstats	23:45:39	0
2222	99	147	10,112	cyclictest	27857	-21	grep	21:40:55	0
2222	99	146	16,108	cyclictest	19061	-21	diskstats	20:50:33	0
2222	99	146	13,28	cyclictest	29785	-21	http	21:55:05	0
2222	99	146	11,23	cyclictest	13254	-21	df	23:30:27	0
2222	99	145	17,22	cyclictest	16882	-21	snmpd	22:58:03	0
2222	99	145	15,25	cyclictest	17473	-21	ntp_states	23:55:49	0
2222	99	145	13,23	cyclictest	18776	-21	apt-get	00:05:22	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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