OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #e, slot #6

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 50 highest latencies:

System rackeslot6.osadl.org (updated Wed Jun 24, 2026 00:44:55)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
544590	99	133	122,8	cyclictest	622157	-21	latency_hist	23:10:01	1
544590	99	123	111,9	cyclictest	573372	-21	latency_hist	20:40:01	1
544590	99	118	110,6	cyclictest	541401	-21	kworker/u8:0+events_unbound	19:25:01	1
544590	99	118	107,8	cyclictest	559045	-21	latency_hist	19:55:01	1
544589	99	116	100,13	cyclictest	617148	-21	http	22:55:01	0
544590	99	114	109,3	cyclictest	631682	-21	kworker/u8:0+events_unbound	00:25:01	1
544590	99	114	106,6	cyclictest	1213033	-21	systemd-journal	00:03:59	1
544590	99	111	106,4	cyclictest	622143	-21	kworker/u8:1+events_unbound	23:30:22	1
544590	99	111	106,4	cyclictest	592957	-21	kworker/u8:1+events_unbound	21:40:25	1
544590	99	108	103,4	cyclictest	548324	-21	kworker/u8:1+events_unbound	19:35:01	1
544590	99	105	99,5	cyclictest	555898	-21	kworker/u8:1+flush-179:0	20:00:34	1
544590	99	103	97,4	cyclictest	596162	-21	kworker/u8:1+flush-179:0	21:50:15	1
544589	99	102	91,8	cyclictest	651146	-21	latency_hist	00:40:02	0
544590	99	101	96,4	cyclictest	620557	-21	kworker/u8:2+events_unbound	23:10:27	1
544590	99	100	95,4	cyclictest	647930	-21	kworker/u8:3+flush-179:0	00:30:25	1
544590	99	100	91,4	cyclictest	615554	-21	kworker/u8:2+events_unbound	22:55:26	1
544590	99	99	86,5	cyclictest	574950	-21	kworker/u8:0+events_unbound	20:45:19	1
544590	99	98	93,4	cyclictest	600935	-21	kworker/u8:2+flush-179:0	22:10:25	1
544590	99	98	93,4	cyclictest	544418	-21	kworker/u8:3+flush-179:0	19:10:24	1
544590	99	98	83,5	cyclictest	594569	-21	kworker/u8:2+events_unbound	21:45:12	1
544589	99	98	88,7	cyclictest	510	-21	rs:main		0
544590	99	96	90,4	cyclictest	631682	-21	kworker/u8:0+flush-179:0	00:25:21	1
544590	99	95	89,4	cyclictest	631682	-21	kworker/u8:0+events_unbound	00:10:24	1
544590	99	95	89,4	cyclictest	631682	-21	kworker/u8:0+events_unbound	00:10:24	1
544589	99	95	85,7	cyclictest	579998	-21	latency_hist	21:00:02	0
544589	99	95	85,7	cyclictest	579998	-21	latency_hist	21:00:01	0
544590	99	94	89,4	cyclictest	589842	-21	kworker/u8:3+flush-179:0	21:30:25	1
544590	99	94	88,4	cyclictest	597793	-21	kworker/u8:3+flush-179:0	22:35:20	1
544590	99	92	87,4	cyclictest	583216	-21	kworker/u8:2+events_unbound	21:10:17	1
544590	99	91	85,4	cyclictest	544418	-21	kworker/u8:3+flush-179:0	19:15:14	1
544590	99	90	85,4	cyclictest	600935	-21	kworker/u8:2+events_unbound	22:15:20	1
544590	99	90	85,4	cyclictest	574950	-21	kworker/u8:0+events_unbound	20:50:22	1
544590	99	90	85,4	cyclictest	552664	-21	kworker/u8:3+events_unbound	20:05:23	1
544590	99	90	82,5	cyclictest	554254	-21	kworker/u8:0+flush-179:0	19:45:00	1
544590	99	90	81,3	cyclictest	597793	-21	kworker/u8:3+events_unbound	21:55:20	1
544590	99	88	78,8	cyclictest	586890	-21	apt-get	21:20:12	1
544589	99	88	79,7	cyclictest	510	-21	rs:main		0
544590	99	87	82,4	cyclictest	529547	-21	kworker/u8:2+flush-179:0	19:20:21	1
544589	99	87	80,5	cyclictest	646343	-21	kworker/u8:2+flush-179:0	00:30:01	0
544590	99	86	81,4	cyclictest	565444	-21	kworker/u8:0+events_unbound	20:25:23	1
544589	99	86	77,7	cyclictest	588219	-21	latency_hist	21:25:01	0
544590	99	85	80,3	cyclictest	613920	-21	kworker/u8:0+events_unbound	22:45:13	1
544589	99	85	77,6	cyclictest	575099	-21	gpgv	20:45:01	0
544590	99	84	80,3	cyclictest	631682	-21	kworker/u8:0+flush-179:0	23:50:21	1
544590	99	84	79,4	cyclictest	552664	-21	kworker/u8:3+flush-179:0	20:10:17	1
544590	99	83	75,5	cyclictest	615554	-21	kworker/u8:2+events_unbound	22:50:19	1
544590	99	82	78,3	cyclictest	622143	-21	kworker/u8:1+events_unbound	23:20:20	1
544590	99	82	77,4	cyclictest	569835	-21	kworker/u8:1+flush-179:0	20:30:21	1
544589	99	82	76,5	cyclictest	641550	-21	kworker/u8:2+flush-179:0	00:15:22	0
544589	99	82	76,5	cyclictest	641550	-21	kworker/u8:2+flush-179:0	00:15:22	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2020-10-04 - 12:21