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Default latency plot of system in rack #c, slot #4

Intel(R) Celeron(R) CPU N3350 @ 1.10GHz, Linux 5.9.1-rt18 (Profile)

Latency plot of system in rack #c, slot #4

Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Sp99 -i200 -h400 -q
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 rackcslot4.osadl.org (updated Fri Jan 15, 2021 00:43:48)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
6785	99	28	10,11	cyclictest	2540	-21	apt-get	22:50:05	1
6785	99	27	8,12	cyclictest	32152	-21	apt-get	22:40:04	1
6784	99	26	9,11	cyclictest	8584	-21	apt-get	23:15:05	0
6785	99	25	9,11	cyclictest	2329	-21	apt-get	20:55:05	1
6785	99	25	3,15	cyclictest	16968	-21	apt-get	23:45:05	1
6785	99	25	2,15	cyclictest	18357	-21	apt-get	23:50:04	1
6784	99	25	8,14	cyclictest	11	1	rcu_preempt	23:05:04	0
6785	99	24	9,10	cyclictest	10374	-21	apt-get	19:20:07	1
6785	99	24	2,15	cyclictest	31157	-40	apt-check	00:35:10	1
6785	99	24	2,15	cyclictest	30554	-21	apt-get	20:40:05	1
6785	99	24	2,15	cyclictest	20998	-21	apt-get	22:00:05	1
6785	99	24	2,15	cyclictest	15953	-21	apt-get	19:40:05	1
6784	99	24	10,2	cyclictest	11	1	rcu_preempt	23:11:38	0
6785	99	23	2,15	cyclictest	26740	-21	apt-get	00:20:04	1
6785	99	23	2,14	cyclictest	31939	-21	apt-get	20:45:07	1
6785	99	23	2,14	cyclictest	28128	-21	apt-get	00:25:08	1
6785	99	23	2,14	cyclictest	16811	-21	apt-get	21:45:05	1
6785	99	23	2,14	cyclictest	14013	-21	apt-get	21:35:05	1
6785	99	23	1,18	cyclictest	20371	-21	apt-get	19:55:02	1
6785	99	23	1,15	cyclictest	27968	-21	apt-get	22:25:04	1
6785	99	23	0,20	cyclictest	8563	-21	apt-get	19:15:05	1
6784	99	23	9,10	cyclictest	15581	-21	apt-get	23:40:04	0
6784	99	23	2,14	cyclictest	21783	-21	apt-get	20:00:05	0
6785	99	22	3,12	cyclictest	29356	-21	apt-get	22:30:05	1
6785	99	22	2,14	cyclictest	3737	-21	apt-get	21:00:03	1
6785	99	22	2,14	cyclictest	25322	-21	apt-get	00:15:05	1
6785	99	22	2,13	cyclictest	21158	-21	apt-get	00:00:05	1
6785	99	22	2,13	cyclictest	18982	-21	apt-get	19:50:05	1
6785	99	22	2,13	cyclictest	18199	-21	apt-get	21:50:04	1
6785	99	22	1,4	cyclictest	2403	-21	grep	22:50:00	1
6785	99	22	1,16	cyclictest	14171	-21	apt-get	23:35:03	1
6785	99	22	0,6	cyclictest	8427	-21	cron	23:14:59	1
6784	99	22	2,13	cyclictest	17592	-21	apt-get	19:45:10	0
6784	99	22	2,12	cyclictest	3928	-21	apt-get	22:55:04	0
6784	99	22	0,20	cyclictest	28877	-21	snmp_o5powerctl	22:25:16	0
6785	99	21	2,14	cyclictest	30744	-21	apt-get	22:35:02	1
6785	99	21	2,13	cyclictest	26580	-21	apt-get	22:20:04	1
6785	99	21	2,13	cyclictest	24561	-21	apt-get	20:10:07	1
6785	99	21	2,13	cyclictest	23935	-21	apt-get	00:10:08	1
6785	99	21	2,13	cyclictest	22549	-21	apt-get	00:05:04	1
6785	99	21	2,13	cyclictest	22390	-21	apt-get	22:05:05	1
6785	99	21	2,13	cyclictest	13149	-21	apt-get	19:30:05	1
6785	99	21	2,13	cyclictest	12776	-21	apt-get	23:30:05	1
6785	99	21	1,9	cyclictest	27757	-21	apt-get	20:30:09	1
6785	99	21	1,3	cyclictest	5782	-40	apt-check	23:05:10	1
6785	99	21	1,14	cyclictest	11390	-21	apt-get	23:25:04	1
6785	99	21	1,13	cyclictest	19586	-21	apt-get	21:55:05	1
6785	99	21	0,4	cyclictest	4319	-21	idleruntime	22:55:08	1
6785	99	21	0,4	cyclictest	17592	-21	apt-get	19:45:06	1
6784	99	21	2,12	cyclictest	8953	-21	apt-get	19:15:11	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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