OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #f, slot #7

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8
Special All - All RT - Optimization - Ethernet - Thumbnails

Click here to display the system's profile data.

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.

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 rackfslot7s.osadl.org (updated Sun Feb 22, 2026 00:44:17)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1712810	99	2849	13,2832	cyclictest	1809973	-21	kworker/0:2+events	00:15:13	0
1712820	99	2837	13,2822	cyclictest	1766811	-21	kworker/3:3+events	22:05:13	3
1712815	99	2799	13,2783	cyclictest	1766876	-21	kworker/1:1+events	22:25:21	1
1712820	99	2764	13,2746	cyclictest	1781416	-21	kworker/3:1+events	22:55:18	3
1712817	99	2708	13,2691	cyclictest	1752905	-21	kworker/2:0+events	21:20:14	2
1712817	99	2704	13,2687	cyclictest	1751206	-21	kworker/2:1+events	21:10:13	2
1712817	99	2585	13,2566	cyclictest	1752905	-21	kworker/2:0+events	21:15:16	2
1712815	99	2561	13,2545	cyclictest	1744953	-21	kworker/1:0+events	20:50:41	1
1712815	99	2556	12,2541	cyclictest	1713989	-21	kworker/1:2+events	19:15:00	1
1712815	99	2536	12,2521	cyclictest	1741365	-21	kworker/1:1+events	20:40:02	1
1712820	99	2507	9,2494	cyclictest	1762300	-21	kworker/3:0+events	21:44:35	3
1712815	99	2493	12,2477	cyclictest	1755780	-21	kworker/1:0+events	21:43:50	1
1712810	99	2493	12,2478	cyclictest	1746518	-21	kworker/0:0+events	20:55:16	0
1712815	99	2489	11,2475	cyclictest	1755780	-21	kworker/1:0+events	21:28:38	1
1712810	99	2489	12,2473	cyclictest	1779889	-21	kworker/0:0+events	23:08:37	0
1712815	99	2488	9,2476	cyclictest	1759195	-21	kworker/1:2+events	21:38:55	1
1712810	99	2488	11,2474	cyclictest	1762271	-21	kworker/0:2+events	22:04:02	0
1712810	99	2486	12,2470	cyclictest	1808313	-21	kworker/0:1+events	00:20:56	0
1712810	99	2486	11,2471	cyclictest	1805482	-21	kworker/0:0+events	00:06:29	0
1712810	99	2485	12,2470	cyclictest	1758894	-21	kworker/0:0+events	21:33:11	0
1712810	99	2484	12,2469	cyclictest	1727153	-21	kworker/0:0+events	20:03:46	0
1712815	99	2483	12,2467	cyclictest	1789408	-21	kworker/1:0+events	23:26:59	1
1712810	99	2480	10,2467	cyclictest	1738249	-21	kworker/0:2+events	20:32:19	0
1712815	99	2479	12,2459	cyclictest	1777935	-21	kworker/1:0+events	22:35:19	1
1712817	99	2463	12,2447	cyclictest	1771909	-21	kworker/2:2+events	22:30:00	2
1712815	99	2463	12,2448	cyclictest	1716004	-21	kworker/1:0+events	19:21:47	1
1712815	99	2459	12,2444	cyclictest	1787744	-21	kworker/1:1+events	23:02:52	1
1712815	99	2453	11,2438	cyclictest	1805361	-21	kworker/1:1+events	00:05:19	1
1712815	99	2444	12,2429	cyclictest	1777935	-21	kworker/1:0+events	22:46:14	1
1712815	99	2439	12,2424	cyclictest	1753015	-21	kworker/1:2+events	21:16:23	1
1712820	99	2431	12,2416	cyclictest	1743402	-21	kworker/3:0+events	20:45:45	3
1712817	99	2430	9,2417	cyclictest	1752905	-21	kworker/2:0+events	21:25:35	2
1712810	99	2423	10,2409	cyclictest	1798813	-21	kworker/0:2+events	23:39:05	0
1712810	99	2406	12,2391	cyclictest	1756346	-21	kworker/0:1+events	21:27:08	0
1712815	99	2398	11,2383	cyclictest	1735261	-21	kworker/1:1+events	20:21:40	1
1712817	99	2392	8,2381	cyclictest	1727001	-21	kworker/2:1+events	19:51:58	2
1712817	99	2392	11,2377	cyclictest	1719354	-21	kworker/2:2+events	19:30:15	2
1712820	99	2381	9,2368	cyclictest	1785684	-21	kworker/3:0+events	23:01:21	3
1712817	99	2381	11,2366	cyclictest	1767057	-21	kworker/2:2+events	22:06:42	2
1712820	99	2380	12,2364	cyclictest	1724039	-21	kworker/3:2+events	19:48:30	3
1712817	99	2378	12,2363	cyclictest	1806979	-21	kworker/2:1+events	00:13:43	2
1712815	99	2375	10,2362	cyclictest	1805361	-21	kworker/1:1+events	00:21:19	1
1712817	99	2373	12,2358	cyclictest	1743491	-21	kworker/2:1+events	20:46:08	2
1712810	99	2366	12,2351	cyclictest	1794384	-21	kworker/0:1+events	23:27:45	0
1712815	99	2361	10,2347	cyclictest	1731995	-21	kworker/1:0+events	20:13:38	1
1712820	99	2354	10,2341	cyclictest	1719152	-21	kworker/3:2+events	19:30:38	3
1712815	99	2351	11,2337	cyclictest	1771819	-21	kworker/1:2+events	22:17:01	1
1712817	99	2344	10,2331	cyclictest	1741550	-21	kworker/2:2+events	20:44:11	2
1712820	99	2339	10,2325	cyclictest	1770125	-21	kworker/3:1+events	22:20:47	3
1712815	99	2339	11,2325	cyclictest	1794272	-21	kworker/1:1+events	23:34:34	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2024-07-29 - 23:00