OSADL QA Farm on Real-time of Mainline Linux

About - Hardware - CPUs - Benchmarks - Graphics - Benchmarks - Kernels - Boards/Distros - Latency monitoring - Latency plots - System data - Profiles - Compare - Awards

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 Fri Jun 12, 2026 12:44:54)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3007672	99	139	133,5	cyclictest	3065723	-21	kworker/u8:3+events_unbound	11:00:00	0
3007672	99	129	119,7	cyclictest	3078463	-21	apt-get	10:49:32	0
3007672	99	119	108,8	cyclictest	3036784	-21	latency_hist	08:40:01	0
3007672	99	117	112,4	cyclictest	3044719	-21	kworker/u8:2+events_unbound	09:45:00	0
3007672	99	115	106,6	cyclictest	3099556	-21	kworker/u8:3+flush-179:0	12:20:00	0
3007672	99	114	106,6	cyclictest	3072045	-21	kworker/u8:0+events_unbound	10:35:01	0
3007672	99	112	106,4	cyclictest	3021865	-21	kworker/u8:2+flush-179:0	08:10:27	0
3007672	99	111	95,12	cyclictest	1213033	-21	systemd-journal	08:00:01	0
3007672	99	111	107,3	cyclictest	3021865	-21	kworker/u8:2+flush-179:0	08:05:27	0
3007672	99	111	105,4	cyclictest	3019492	-21	kworker/u8:0+flush-179:0	07:45:25	0
3007672	99	109	98,8	cyclictest	3054280	-21	latency_hist	09:35:01	0
3007672	99	109	102,5	cyclictest	3007510	-21	kworker/u8:0+events_unbound	07:25:28	0
3007672	99	109	101,5	cyclictest	3072045	-21	kworker/u8:0+events_unbound	10:45:01	0
3007672	99	109	100,6	cyclictest	3102700	-21	kworker/u8:1+events_unbound	12:15:00	0
3007672	99	108	103,4	cyclictest	3044719	-21	kworker/u8:2+flush-179:0	09:25:25	0
3007672	99	108	102,4	cyclictest	3092232	-21	kworker/u8:0+events_unbound	11:30:22	0
3007675	99	107	97,7	cyclictest	3112515	-21	latency_hist	12:35:00	1
3007672	99	106	94,9	cyclictest	3044737	-21	latency_hist	09:05:01	0
3007672	99	104	95,6	cyclictest	3063176	-21	kworker/u8:0+events_unbound	10:05:14	0
3007675	99	102	91,8	cyclictest	3014190	-21	latency_hist	07:30:02	1
3007672	99	101	97,3	cyclictest	3048904	-21	kworker/u8:3+flush-179:0	09:50:26	0
3007672	99	101	96,4	cyclictest	3065723	-21	kworker/u8:3+flush-179:0	10:35:25	0
3007672	99	101	89,9	cyclictest	3062515	-21	latency_hist	10:00:01	0
3007672	99	100	88,8	cyclictest	3022408	-21	kworker/u8:3+flush-179:0	08:30:21	0
3007675	99	99	90,6	cyclictest	3041520	-21	kworker/u8:0+flush-179:0	09:10:00	1
3007672	99	98	92,4	cyclictest	3036741	-21	kworker/u8:1+flush-179:0	08:50:26	0
3007672	99	98	88,7	cyclictest	3039951	-21	latency_hist	08:50:01	0
3007672	99	97	90,5	cyclictest	3097917	-21	kworker/u8:0+events_unbound	12:05:01	0
3007672	99	96	91,4	cyclictest	3007510	-21	kworker/u8:0+events_unbound	07:30:29	0
3007672	99	96	84,9	cyclictest	3084926	-21	kworker/u8:2+events_unbound	11:25:18	0
3007672	99	95	88,5	cyclictest	3044719	-21	kworker/u8:2+events_unbound	10:25:24	0
3007672	99	95	88,5	cyclictest	3044719	-21	kworker/u8:2+events_unbound	10:25:23	0
3007672	99	95	85,7	cyclictest	3075514	-21	kworker/u8:1+events_unbound	11:05:17	0
3007672	99	93	85,5	cyclictest	3007510	-21	kworker/u8:0+events_unbound	07:35:02	0
3007672	99	93	84,6	cyclictest	3021865	-21	kworker/u8:2+flush-179:0	08:00:23	0
3007672	99	92	87,4	cyclictest	3092232	-21	kworker/u8:0+events_unbound	11:35:24	0
3007672	99	92	87,4	cyclictest	3044719	-21	kworker/u8:2+events_unbound	09:05:20	0
3007672	99	92	85,5	cyclictest	3083333	-21	kworker/u8:0+events_unbound	11:10:15	0
3007672	99	92	74,14	cyclictest	1213033	-21	systemd-journal	11:45:00	0
3007672	99	91	86,4	cyclictest	3044719	-21	kworker/u8:2+flush-179:0	09:35:19	0
3007672	99	91	86,3	cyclictest	3088182	-21	kworker/u8:1+flush-179:0	11:50:22	0
3007672	99	91	85,4	cyclictest	3065723	-21	kworker/u8:3+flush-179:0	11:00:22	0
3007672	99	91	79,9	cyclictest	3012349	-21	latency_hist	07:25:01	0
3007675	99	90	80,7	cyclictest	3025625	-21	latency_hist	08:05:01	1
3007672	99	90	83,4	cyclictest	3052729	-21	kworker/u8:0+flush-179:0	09:45:21	0
3007675	99	89	77,10	cyclictest	3093411	-21	apt-get	11:35:10	1
3007672	99	89	85,3	cyclictest	3084978	-21	kworker/u8:3+events_unbound	11:15:22	0
3007672	99	89	85,3	cyclictest	3084978	-21	kworker/u8:3+events_unbound	11:15:21	0
3007672	99	89	85,3	cyclictest	3048904	-21	kworker/u8:3+events_unbound	09:15:27	0
3007675	99	88	80,5	cyclictest	3048904	-21	kworker/u8:3+flush-179:0	09:20:26	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


Access: public		Short link to this page
This page was last modified on 2020-10-04 - 12:21