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 100 highest latencies:

System rackeslot6.osadl.org (updated Thu Jul 09, 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
3411894	99	126	117,6	cyclictest	3510475	-21	latency_hist	00:15:01	1
3411891	99	121	114,5	cyclictest	3469573	-21	kworker/u8:0+events_unbound	22:15:00	0
3411891	99	121	114,5	cyclictest	3469573	-21	kworker/u8:0+events_unbound	22:15:00	0
3411891	99	120	111,6	cyclictest	3443874	-21	latency_hist	20:50:00	0
3411891	99	118	111,4	cyclictest	3419987	-21	kworker/u8:3+flush-179:0	20:00:15	0
3411891	99	114	106,5	cyclictest	3481258	-21	kworker/u8:1+events_unbound	22:45:23	0
3411891	99	112	103,6	cyclictest	3418412	-21	latency_hist	19:30:01	0
3411891	99	109	95,10	cyclictest	1213033	-21	systemd-journal	22:35:14	0
3411891	99	108	102,4	cyclictest	3427932	-21	kworker/u8:0+flush-179:0	20:10:16	0
3411891	99	107	100,5	cyclictest	3489259	-21	kworker/u8:1+events_unbound	23:10:00	0
3411891	99	105	99,4	cyclictest	3449315	-21	kworker/u8:0+flush-179:0	21:40:16	0
3411891	99	105	90,10	cyclictest	799521	-21	cups-browsed	00:00:01	0
3411891	99	104	95,6	cyclictest	3456023	-21	kworker/u8:2+flush-179:0	22:10:00	0
3411891	99	99	85,10	cyclictest	3446122	-21	kworker/u8:1+flush-179:0	21:00:21	0
3411891	99	99	85,10	cyclictest	3446122	-21	kworker/u8:1+flush-179:0	21:00:21	0
3411894	99	97	92,4	cyclictest	3449315	-21	kworker/u8:0+events_unbound	21:45:24	1
3411891	99	95	90,3	cyclictest	3500911	-21	kworker/u8:3+flush-179:0	00:35:20	0
3411891	99	94	88,4	cyclictest	3504049	-21	latency_hist	23:55:01	0
3411891	99	94	85,6	cyclictest	3469573	-21	kworker/u8:0+flush-179:0	22:55:01	0
3411891	99	94	83,8	cyclictest	3477808	-21	latency_hist	22:35:01	0
3411891	99	92	86,4	cyclictest	3425678	-21	kworker/u8:4+flush-179:0	19:50:20	0
3411891	99	92	86,4	cyclictest	3425678	-21	kworker/u8:4+flush-179:0	19:50:20	0
3411891	99	92	85,5	cyclictest	3412809	-21	kworker/u8:1+flush-179:0	19:15:17	0
3411891	99	91	81,7	cyclictest	3476221	-21	latency_hist	22:30:01	0
3411891	99	91	81,6	cyclictest	3449315	-21	kworker/u8:0+flush-179:0	21:30:16	0
3411891	99	89	86,1	cyclictest	3442288	-21	latency_hist	20:45:01	0
3411891	99	89	84,3	cyclictest	3449315	-21	kworker/u8:0+flush-179:0	21:35:20	0
3411894	99	88	76,10	cyclictest	3485780	-21	apt-get	23:00:03	1
3411894	99	87	76,8	cyclictest	3437508	-21	latency_hist	20:30:00	1
3411894	99	87	73,9	cyclictest	3416808	-21	kworker/u8:0+events_unbound	19:25:02	1
3411891	99	87	80,4	cyclictest	3496333	-21	kworker/u8:2+events_unbound	23:45:24	0
3411891	99	87	80,4	cyclictest	3433738	-21	kworker/u8:1+flush-179:0	20:25:21	0
3411894	99	86	76,7	cyclictest	1213033	-21	systemd-journal	20:20:01	1
3411894	99	86	76,7	cyclictest	1213033	-21	systemd-journal	20:20:00	1
3411891	99	86	79,5	cyclictest	3507277	-21	kworker/u8:0+flush-179:0	00:04:02	0
3411894	99	85	74,8	cyclictest	510	-21	rs:main		1
3411891	99	84	79,3	cyclictest	3496333	-21	kworker/u8:2+flush-179:0	23:40:23	0
3411891	99	84	74,7	cyclictest	3446122	-21	kworker/u8:1+flush-179:0	20:55:22	0
3411891	99	83	77,4	cyclictest	3411685	-21	kworker/u8:0+flush-179:0	19:10:22	0
3411894	99	82	73,6	cyclictest	3453414	-21	latency_hist	21:20:02	1
3411891	99	82	77,4	cyclictest	3440746	-21	kworker/u8:3+flush-179:0	20:50:21	0
3411891	99	82	76,4	cyclictest	3429593	-21	kworker/u8:1+flush-179:0	20:05:16	0
3411894	99	81	73,6	cyclictest	3500911	-21	kworker/u8:3+flush-179:0	00:04:00	1
3411891	99	81	74,4	cyclictest	3483578	-21	kworker/u8:2+flush-179:0	22:55:22	0
3411891	99	81	69,9	cyclictest	1213033	-21	systemd-journal	19:50:01	0
3411894	99	80	71,7	cyclictest	3492921	-21	apt-get	23:20:11	1
3411894	99	80	70,8	cyclictest	3449315	-21	kworker/u8:0+flush-179:0	22:00:00	1
3411894	99	80	65,11	cyclictest	3469633	-21	apt-key	22:10:01	1
3411894	99	80	64,13	cyclictest	1213033	-21	systemd-journal	20:10:01	1
3411891	99	80	73,5	cyclictest	3449315	-21	kworker/u8:0+flush-179:0	21:45:15	0
3411891	99	79	74,3	cyclictest	3500911	-21	kworker/u8:3+flush-179:0	00:20:24	0
3411891	99	79	73,4	cyclictest	3469573	-21	kworker/u8:0+events_unbound	22:20:23	0
3411891	99	78	71,5	cyclictest	3433738	-21	kworker/u8:1+flush-179:0	20:30:15	0
3411894	99	77	64,9	cyclictest	3449315	-21	kworker/u8:0+flush-179:0	21:45:00	1
3411891	99	77	69,6	cyclictest	3500911	-21	kworker/u8:3+flush-179:0	00:25:16	0
3411891	99	76	66,7	cyclictest	3412809	-21	kworker/u8:1+flush-179:0	19:40:00	0
3411894	99	75	71,2	cyclictest	3456023	-21	kworker/u8:2+flush-179:0	21:30:00	1
3411891	99	75	68,4	cyclictest	3446122	-21	kworker/u8:1+flush-179:0	21:10:22	0
3411891	99	75	63,8	cyclictest	3469573	-21	kworker/u8:0+flush-179:0	22:15:19	0
3411891	99	74	66,5	cyclictest	3469573	-21	kworker/u8:0+flush-179:0	22:40:22	0
3411891	99	74	65,6	cyclictest	3487617	-21	kworker/u8:3+flush-179:0	23:10:20	0
3411894	99	73	65,6	cyclictest	3471980	-21	diskstats	22:15:14	1
3411891	99	73	56,7	cyclictest	3433738	-21	kworker/u8:1+events_unbound	20:40:01	0
3411894	99	72	67,4	cyclictest	3476257	-21	kworker/u8:3+flush-179:0	22:35:20	1
3411891	99	72	67,3	cyclictest	3496333	-21	kworker/u8:2+flush-179:0	00:10:20	0
3411891	99	72	62,7	cyclictest	3412809	-21	kworker/u8:1+events_unbound	19:20:02	0
3411894	99	69	56,10	cyclictest	3495838	-21	latency_hist	23:30:00	1
3411891	99	69	63,4	cyclictest	3500911	-21	kworker/u8:3+flush-179:0	00:15:22	0
3411891	99	69	62,5	cyclictest	3412809	-21	kworker/u8:1+flush-179:0	19:40:17	0
3411891	99	69	60,6	cyclictest	3492625	-21	kworker/u8:0+flush-179:0	23:25:18	0
3411891	99	68	50,8	cyclictest	3500911	-21	kworker/u8:3+events_unbound	00:30:15	0
3411894	99	66	58,7	cyclictest	3476477	-21	apt-get	22:30:12	1
3411891	99	66	59,5	cyclictest	3489259	-21	kworker/u8:1+flush-179:0	23:20:00	0
3411896	99	65	0,1	cyclictest	0	-21	swapper/2	23:18:59	2
3411894	99	65	58,5	cyclictest	3481255	-21	apt-get	22:45:10	1
3411894	99	64	59,3	cyclictest	3440140	-21	kworker/u8:2+flush-179:0	20:40:14	1
3411894	99	64	56,6	cyclictest	3427932	-21	kworker/u8:0+events_unbound	20:15:01	1
3411894	99	63	53,7	cyclictest	3412809	-21	kworker/u8:1+flush-179:0	19:15:00	1
3411894	99	63	47,13	cyclictest	3469573	-21	kworker/u8:0+flush-179:0	22:25:15	1
3411891	99	63	59,3	cyclictest	3412809	-21	kworker/u8:1+flush-179:0	19:30:27	0
3411894	99	62	49,10	cyclictest	1213033	-21	systemd-journal	23:45:16	1
3411891	99	62	56,4	cyclictest	3450271	-21	kworker/u8:2+events_unbound	21:15:13	0
3411894	99	61	52,6	cyclictest	3489259	-21	kworker/u8:1+flush-179:0	23:15:17	1
3411891	99	61	51,8	cyclictest	3496352	-21	apt-get	23:30:10	0
3411894	99	60	53,5	cyclictest	3508889	-21	latency_hist	00:10:02	1
3411894	99	60	49,8	cyclictest	3469573	-21	kworker/u8:0+flush-179:0	23:10:00	1
3411891	99	60	48,9	cyclictest	3496333	-21	kworker/u8:2+flush-179:0	00:10:01	0
3411894	99	59	54,4	cyclictest	3446122	-21	kworker/u8:1+flush-179:0	21:10:23	1
3411891	99	59	53,4	cyclictest	3483578	-21	kworker/u8:2+events_unbound	23:00:18	0
3411894	99	58	52,4	cyclictest	3500911	-21	kworker/u8:3+flush-179:0	00:15:11	1
3411894	99	58	51,5	cyclictest	3496333	-21	kworker/u8:2+flush-179:0	23:40:25	1
3411891	99	58	54,2	cyclictest	3435922	-21	latency_hist	20:25:01	0
3411891	99	58	51,5	cyclictest	3433738	-21	kworker/u8:1+flush-179:0	20:20:01	0
3411891	99	58	51,5	cyclictest	3433738	-21	kworker/u8:1+flush-179:0	20:20:01	0
3411894	99	57	44,10	cyclictest	3485780	-21	apt-get	23:00:01	1
3411894	99	56	46,8	cyclictest	3428513	-21	diskstats	20:00:17	1
3411894	99	56	44,9	cyclictest	3412809	-21	kworker/u8:1+flush-179:0	19:15:19	1
3411894	99	55	47,6	cyclictest	3469573	-21	kworker/u8:0+flush-179:0	22:10:21	1
3411894	99	55	47,6	cyclictest	3469573	-21	kworker/u8:0+flush-179:0	22:10:21	1
3411891	99	55	50,4	cyclictest	3456023	-21	kworker/u8:2+flush-179:0	22:04:55	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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