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 May 22, 2026 00:44:54)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2887554	99	119	113,3	cyclictest	2885976	-21	kworker/u8:0+flush-179:0	19:10:01	1
2887550	99	117	101,12	cyclictest	2929197	-21	latency_hist	21:20:01	0
2887554	99	116	104,9	cyclictest	1213033	-21	systemd-journal	23:05:01	1
2887554	99	106	100,4	cyclictest	2976129	-21	kworker/u8:0+events_unbound	00:00:18	1
2887554	99	103	98,4	cyclictest	2986796	-21	kworker/u8:0+events_unbound	00:30:00	1
2887550	99	100	90,7	cyclictest	2911617	-21	latency_hist	20:25:01	0
2887554	99	96	87,7	cyclictest	2913204	-21	latency_hist	20:30:01	1
2887550	99	93	82,8	cyclictest	2969772	-21	latency_hist	23:25:01	0
2887554	99	91	83,7	cyclictest	2961860	-21	kworker/u8:3+events_unbound	23:10:00	1
2887554	99	90	85,4	cyclictest	2968426	-21	kworker/u8:2+events_unbound	23:20:26	1
2887554	99	90	69,12	cyclictest	2913183	-21	kworker/u8:2+events_unbound	20:50:20	1
2887554	99	89	80,6	cyclictest	2990766	-21	kworker/u8:3+flush-179:0	00:35:21	1
2887554	99	88	83,4	cyclictest	2914827	-21	kworker/u8:1+events_unbound	21:05:01	1
2887554	99	88	82,4	cyclictest	2952230	-21	kworker/u8:0+events_unbound	22:50:00	1
2887554	99	88	77,9	cyclictest	2980951	-40	mandb	00:00:01	1
2887550	99	88	81,5	cyclictest	2963405	-21	latency_hist	23:05:01	0
2887550	99	88	77,8	cyclictest	2988941	-21	latency_hist	00:25:00	0
2887554	99	87	78,6	cyclictest	2943776	-21	latency_hist	22:05:00	1
2887554	99	86	82,3	cyclictest	2932658	-21	kworker/u8:2+flush-179:0	21:40:23	1
2887554	99	86	80,4	cyclictest	2900458	-21	kworker/u8:1+events_unbound	20:15:01	1
2887554	99	85	79,5	cyclictest	2976129	-21	kworker/u8:0+events_unbound	23:45:25	1
2887554	99	85	78,5	cyclictest	2893271	-21	kworker/u8:0+flush-179:0	19:30:25	1
2887554	99	85	76,6	cyclictest	2935808	-21	latency_hist	21:40:01	1
2887554	99	84	78,4	cyclictest	2893271	-21	kworker/u8:0+events_unbound	19:35:24	1
2887550	99	84	74,7	cyclictest	2931036	-21	latency_hist	21:25:00	0
2887550	99	84	70,10	cyclictest	2890695	-21	kworker/u8:2+events_unbound	19:25:01	0
2887554	99	83	78,4	cyclictest	2926038	-21	kworker/u8:3+flush-179:0	21:25:16	1
2887554	99	83	77,4	cyclictest	2943811	-21	kworker/u8:3+flush-179:0	22:15:21	1
2887554	99	83	73,7	cyclictest	2951993	-21	latency_hist	22:30:00	1
2887550	99	83	74,6	cyclictest	2897272	-21	latency_hist	19:40:01	0
2887550	99	83	73,7	cyclictest	2889050	-21	latency_hist	19:15:01	0
2887550	99	83	72,7	cyclictest	2902084	-21	kworker/u8:3+flush-179:0	20:05:13	0
2887554	99	82	76,3	cyclictest	2952230	-21	kworker/u8:0+flush-179:0	22:50:15	1
2887554	99	82	74,5	cyclictest	2972938	-21	kworker/u8:4+events_unbound	23:40:14	1
2887550	99	82	72,7	cyclictest	2895413	-21	kworker/u8:2+flush-179:0	19:55:17	0
2887554	99	81	76,4	cyclictest	2926038	-21	kworker/u8:3+flush-179:0	21:20:24	1
2887550	99	81	71,7	cyclictest	2971360	-21	latency_hist	23:30:02	0
2887550	99	81	71,7	cyclictest	2935856	-21	kworker/u8:0+flush-179:0	21:50:21	0
2887554	99	80	72,6	cyclictest	2953563	-21	kworker/u8:1+events_unbound	23:10:18	1
2887550	99	79	70,6	cyclictest	2910267	-21	kworker/u8:3+flush-179:0	20:35:22	0
2887550	99	79	70,6	cyclictest	2910267	-21	kworker/u8:3+flush-179:0	20:25:12	0
2887554	99	78	73,4	cyclictest	2893271	-21	kworker/u8:0+events_unbound	19:45:23	1
2887554	99	78	70,4	cyclictest	2910267	-21	kworker/u8:3+events_unbound	20:35:00	1
2887554	99	78	67,3	cyclictest	2981913	-21	kworker/u8:1+flush-179:0	00:10:27	1
2887554	99	77	68,7	cyclictest	2904325	-21	kworker/u8:0+flush-179:0	20:00:25	1
2887554	99	77	68,6	cyclictest	2913183	-21	kworker/u8:2+events_unbound	21:05:21	1
2887550	99	77	68,6	cyclictest	2969807	-21	kworker/u8:3+flush-179:0	23:35:13	0
2887554	99	76	68,6	cyclictest	2890695	-21	kworker/u8:2+flush-179:0	19:25:21	1
2887554	99	76	68,6	cyclictest	2890695	-21	kworker/u8:2+flush-179:0	19:25:21	1
2887554	99	76	65,4	cyclictest	2885976	-21	kworker/u8:0+flush-179:0	19:10:22	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