OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #7, slot #8

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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, lowest P state: performance
Compare latency of primary with shadow system

Characteristics of the 50 highest latencies:

System rack7slot8.osadl.org (updated Thu Apr 02, 2026 14:44:18)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
16126	2	208	28,50	sleep0	0	-21	swapper/0	07:06:21	0
16625	99	107	17,35	cyclictest	2110	-21	df	12:30:13	0
16625	99	101	39,46	cyclictest	102	50	irq/56-4a100000	09:55:21	0
16625	99	101	19,62	cyclictest	1408	-21	nginx	08:46:05	0
16625	99	98	34,44	cyclictest	29991	-21	wget	08:00:11	0
16625	99	97	70,12	cyclictest	10	1	ktimersoftd/0	09:02:12	0
16625	99	97	25,34	cyclictest	27518	-21	df	07:50:22	0
16625	99	95	33,11	cyclictest	10	1	ktimersoftd/0	10:30:40	0
16625	99	93	54,25	cyclictest	10	1	ktimersoftd/0	08:05:28	0
16625	99	93	51,26	cyclictest	10	1	ktimersoftd/0	09:17:00	0
16625	99	93	18,36	cyclictest	30194	-21	ntp_states	10:05:41	0
16625	99	92	50,27	cyclictest	10	1	ktimersoftd/0	08:50:38	0
16625	99	92	42,15	cyclictest	102	50	irq/56-4a100000	11:26:36	0
16625	99	92	28,48	cyclictest	1287	-21	aten_r7power_po	08:15:14	0
16625	99	92	20,17	cyclictest	20979	-21	chrt	11:37:14	0
16625	99	92	18,19	cyclictest	20591	-21	apt-get	09:32:15	0
16625	99	91	23,48	cyclictest	19671	-21	sshd	07:20:43	0
16625	99	91	17,36	cyclictest	12534	-21	diskstats	11:05:19	0
16625	99	90	7,15	cyclictest	15212	-21	apt-get	09:12:10	0
16625	99	90	57,23	cyclictest	26480	-21	mailstats	07:46:32	0
16625	99	90	51,24	cyclictest	10	1	ktimersoftd/0	09:25:18	0
16625	99	90	47,28	cyclictest	10	1	ktimersoftd/0	08:10:40	0
16625	99	90	44,30	cyclictest	36	50	irq/20-49000000	12:25:39	0
16625	99	90	16,37	cyclictest	18465	-21	fw_forwarded_lo	09:20:26	0
16625	99	89	25,48	cyclictest	36	50	irq/20-49000000	07:15:16	0
16625	99	89	19,29	cyclictest	1408	-21	nginx	08:41:04	0
16625	99	88	54,23	cyclictest	29235	-21	/usr/sbin/munin	12:10:36	0
16625	99	88	42,34	cyclictest	25035	-21	diskstats	09:45:22	0
16625	99	88	40,37	cyclictest	19703	-21	gpgv	11:35:04	0
16625	99	88	37,35	cyclictest	36	50	irq/20-49000000	12:20:53	0
16625	99	88	27,23	cyclictest	31244	-21	diskstats	10:10:19	0
16625	99	88	23,31	cyclictest	1408	-21	nginx	07:25:50	0
16625	99	88	17,50	cyclictest	754	-21	systemd-journal	08:31:02	0
16625	99	87	32,39	cyclictest	0	-21	swapper/0	12:06:38	0
16625	99	87	18,49	cyclictest	32275	-21	/usr/sbin/munin	10:15:29	0
16625	99	87	16,34	cyclictest	1305	-21	snmpd	07:55:23	0
16625	99	87	14,36	cyclictest	15214	-21	munin-run	09:10:04	0
16625	99	87	13,35	cyclictest	1484	-21	runrttasks	10:20:35	0
16625	99	86	60,12	cyclictest	10	1	ktimersoftd/0	08:25:47	0
16625	99	86	36,33	cyclictest	27627	-21	latency_hist	12:05:04	0
16625	99	86	35,33	cyclictest	7431	-21	aten_r7power_po	10:45:13	0
16625	99	86	25,21	cyclictest	2703	-21	df_inode	08:20:18	0
16625	99	86	17,52	cyclictest	17867	-21	sed	07:15:03	0
16625	99	86	15,52	cyclictest	2369	-21	seq	10:25:07	0
16625	99	85	50,24	cyclictest	6328	-21	runrttasks	10:40:22	0
16625	99	85	38,37	cyclictest	7346	-21	cron	08:40:01	0
16625	99	85	34,33	cyclictest	15015	-21	sshd	11:15:20	0
16625	99	85	32,35	cyclictest	8589	-21	munin-node	10:50:09	0
16625	99	85	21,34	cyclictest	5557	-21	sshd	10:36:27	0
16625	99	85	15,19	cyclictest	28776	-21	diskstats	10:00:23	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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