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 Jul 03, 2026 00:44:51)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3964180	99	132	125,5	cyclictest	4014005	-21	latency_hist	21:45:02	1
3964177	99	130	124,4	cyclictest	4051793	-21	kworker/u8:0+events_unbound	00:05:24	0
3964177	99	128	117,8	cyclictest	3973963	-21	latency_hist	19:40:02	0
3964177	99	127	116,8	cyclictest	4054302	-21	latency_hist	23:50:01	0
3964180	99	120	114,4	cyclictest	4027619	-21	kworker/u8:0+events_unbound	22:55:25	1
3964177	99	120	109,8	cyclictest	3986952	-21	latency_hist	20:20:01	0
3964180	99	118	112,4	cyclictest	4051793	-21	kworker/u8:0+flush-179:0	00:10:00	1
3964180	99	118	110,6	cyclictest	4023834	-21	kworker/u8:1+events_unbound	22:20:00	1
3964180	99	118	108,7	cyclictest	4047937	-21	latency_hist	23:30:01	1
3964180	99	118	103,11	cyclictest	4057805	-21	cupsd	00:00:01	1
3964177	99	116	106,7	cyclictest	3969180	-21	latency_hist	19:25:01	0
3964180	99	113	105,5	cyclictest	3965867	-21	kworker/u8:3+events_unbound	19:25:14	1
3964180	99	112	96,5	cyclictest	3986988	-21	kworker/u8:2+events_unbound	21:10:00	1
3964180	99	112	105,4	cyclictest	4044777	-21	kworker/u8:1+flush-179:0	23:20:23	1
3964180	99	110	101,6	cyclictest	4051793	-21	kworker/u8:0+events_unbound	23:45:17	1
3964177	99	110	104,4	cyclictest	3986988	-21	kworker/u8:2+events_unbound	21:05:17	0
3964180	99	109	100,7	cyclictest	3977390	-21	latency_hist	19:50:01	1
3964177	99	109	104,4	cyclictest	3965867	-21	kworker/u8:3+events_unbound	19:25:23	0
3964177	99	109	102,5	cyclictest	4013980	-21	kworker/u8:0+events_unbound	22:10:13	0
3964177	99	109	101,7	cyclictest	4055867	-21	kworker/u8:1+flush-179:0	00:00:01	0
3964180	99	108	101,5	cyclictest	4038376	-21	kworker/u8:2+events_unbound	23:15:00	1
3964180	99	108	101,4	cyclictest	3986988	-21	kworker/u8:2+events_unbound	20:25:22	1
3964177	99	108	99,3	cyclictest	3986988	-21	kworker/u8:2+events_unbound	22:25:14	0
3964177	99	108	103,4	cyclictest	3973913	-21	kworker/u8:1+events_unbound	20:05:24	0
3964180	99	107	97,6	cyclictest	4028559	-21	kworker/u8:1+events_unbound	22:40:24	1
3964177	99	107	102,4	cyclictest	3963346	-21	kworker/u8:0+flush-179:0	19:30:23	0
3964180	99	106	91,5	cyclictest	4056024	-21	kworker/u8:3+flush-179:0	00:00:24	1
3964177	99	106	97,7	cyclictest	3991701	-21	kworker/u8:3+flush-179:0	20:35:15	0
3964180	99	105	94,7	cyclictest	3963346	-21	kworker/u8:0+events_unbound	19:20:17	1
3964177	99	104	99,3	cyclictest	4027619	-21	kworker/u8:0+events_unbound	22:55:23	0
3964180	99	103	97,4	cyclictest	4006007	-21	kworker/u8:0+events_unbound	21:30:15	1
3964180	99	103	97,4	cyclictest	3991701	-21	kworker/u8:3+events_unbound	20:35:15	1
3964180	99	103	96,5	cyclictest	4006098	-21	kworker/u8:3+events_unbound	21:20:15	1
3964180	99	103	86,6	cyclictest	4034928	-21	kworker/u8:1+flush-179:0	22:50:21	1
3964180	99	102	95,6	cyclictest	3986988	-21	kworker/u8:2+events_unbound	22:00:00	1
3964180	99	102	94,5	cyclictest	3986988	-21	kworker/u8:2+events_unbound	21:50:14	1
3964180	99	101	92,6	cyclictest	4013980	-21	kworker/u8:0+flush-179:0	22:05:15	1
3964180	99	101	92,6	cyclictest	4013980	-21	kworker/u8:0+flush-179:0	22:05:15	1
3964180	99	101	92,6	cyclictest	4013980	-21	kworker/u8:0+events_unbound	21:50:01	1
3964177	99	101	96,4	cyclictest	4028559	-21	kworker/u8:1+events_unbound	22:35:24	0
3964180	99	100	94,4	cyclictest	4065743	-21	kworker/u8:2+flush-179:0	00:25:25	1
3964180	99	100	85,6	cyclictest	4018999	-21	kworker/u8:3+events_unbound	22:25:00	1
3964177	99	100	95,4	cyclictest	3993605	-21	kworker/u8:0+events_unbound	20:45:22	0
3964180	99	99	89,7	cyclictest	3996728	-21	kworker/u8:1+events_unbound	20:55:14	1
3964177	99	99	94,4	cyclictest	4028559	-21	kworker/u8:1+events_unbound	22:40:20	0
3964180	99	98	76,9	cyclictest	4051793	-21	kworker/u8:0+flush-179:0	00:10:16	1
3964180	99	97	92,4	cyclictest	3977370	-21	kworker/u8:2+flush-179:0	19:50:24	1
3964177	99	97	91,4	cyclictest	4051793	-21	kworker/u8:0+events_unbound	00:10:19	0
3964180	99	96	86,6	cyclictest	4065743	-21	kworker/u8:2+events_unbound	00:35:15	1
3964180	99	95	91,3	cyclictest	4006007	-21	kworker/u8:0+events_unbound	21:25:19	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