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 100 highest latencies:

System rackfslot7s.osadl.org (updated Mon Feb 23, 2026 00:44:18)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2186621	99	2973	14,2954	cyclictest	2276859	-21	kworker/3:0+events	00:10:13	3
2186621	99	2919	10,2904	cyclictest	2196577	-21	kworker/3:0+events	20:00:12	3
2186621	99	2800	13,2782	cyclictest	2196577	-21	kworker/3:0+events	20:05:13	3
2186621	99	2800	13,2782	cyclictest	2196577	-21	kworker/3:0+events	20:05:13	3
2186611	99	2793	13,2776	cyclictest	2267515	-21	kworker/0:2+events	23:20:15	0
2186617	99	2746	13,2729	cyclictest	2265880	-21	kworker/2:2+events	23:15:19	2
2186621	99	2704	13,2687	cyclictest	2272013	-21	kworker/3:1+events	23:40:11	3
2186617	99	2701	13,2684	cyclictest	2262407	-21	kworker/2:1+events	23:05:19	2
2186613	99	2658	13,2640	cyclictest	2269107	-21	kworker/1:0+events	23:25:12	1
2186621	99	2528	10,2514	cyclictest	2251301	-21	kworker/3:1+events	22:52:44	3
2186611	99	2520	12,2504	cyclictest	2191840	-21	kworker/0:0+events	19:45:18	0
2186621	99	2512	12,2496	cyclictest	2191723	-21	kworker/3:0+events	19:25:39	3
2186621	99	2497	12,2481	cyclictest	2209527	-21	kworker/3:0+events	20:21:43	3
2186617	99	2487	8,2477	cyclictest	2259181	-21	kworker/2:0+events	23:10:19	2
2186621	99	2462	12,2446	cyclictest	2251301	-21	kworker/3:1+events	22:33:44	3
2186621	99	2455	12,2440	cyclictest	2238163	-21	kworker/3:0+events	21:58:44	3
2186613	99	2453	10,2439	cyclictest	2276830	-21	kworker/1:0+events	23:49:45	1
2186621	99	2450	12,2436	cyclictest	2267488	-21	kworker/3:1+events	23:20:37	3
2186621	99	2449	12,2433	cyclictest	2225385	-21	kworker/3:0+events	21:25:54	3
2186621	99	2447	12,2432	cyclictest	2248067	-21	kworker/3:2+events	22:22:18	3
2186621	99	2446	9,2433	cyclictest	2272013	-21	kworker/3:1+events	23:34:39	3
2186621	99	2446	12,2431	cyclictest	2262284	-21	kworker/3:2+events	23:01:52	3
2186613	99	2446	12,2431	cyclictest	2201290	-21	kworker/1:1+events	19:56:23	1
2186621	99	2435	12,2419	cyclictest	2217494	-21	kworker/3:1+events	20:46:24	3
2186611	99	2427	11,2413	cyclictest	2257818	-21	kworker/0:0+events	22:51:37	0
2186611	99	2419	12,2403	cyclictest	2187891	-21	kworker/0:1+events	19:55:13	0
2186613	99	2417	11,2402	cyclictest	2239877	-21	kworker/1:1+events	21:57:59	1
2186613	99	2409	12,2394	cyclictest	2288173	-21	kworker/1:1+events	00:35:19	1
2186621	99	2408	11,2393	cyclictest	2262284	-21	kworker/3:2+events	23:06:05	3
2186611	99	2407	12,2391	cyclictest	2235209	-21	kworker/0:0+events	21:54:10	0
2186611	99	2402	12,2387	cyclictest	2230233	-21	kworker/0:2+events	21:24:45	0
2186611	99	2402	12,2386	cyclictest	2247410	-21	kworker/0:1+events	22:37:55	0
2186617	99	2398	10,2387	cyclictest	2236444	-21	kworker/2:2+events	21:50:00	2
2186611	99	2398	11,2384	cyclictest	2214304	-21	kworker/0:1+events	20:42:55	0
2186611	99	2394	12,2379	cyclictest	2264275	-21	kworker/0:0+events	23:19:28	0
2186611	99	2385	12,2370	cyclictest	2264275	-21	kworker/0:0+events	23:46:41	0
2186617	99	2384	12,2368	cyclictest	2236444	-21	kworker/2:2+events	22:19:37	2
2186617	99	2376	10,2362	cyclictest	2265880	-21	kworker/2:2+events	23:35:00	2
2186617	99	2375	12,2360	cyclictest	2199744	-21	kworker/2:1+events	20:01:22	2
2186613	99	2375	12,2359	cyclictest	2288173	-21	kworker/1:1+events	00:31:28	1
2186611	99	2374	9,2362	cyclictest	2187891	-21	kworker/0:1+events	19:30:11	0
2186611	99	2370	10,2357	cyclictest	2235209	-21	kworker/0:0+events	22:11:38	0
2186621	99	2365	12,2349	cyclictest	2196577	-21	kworker/3:0+events	19:54:49	3
2186617	99	2363	11,2348	cyclictest	2270475	-21	kworker/2:1+events	23:36:06	2
2186617	99	2357	11,2343	cyclictest	2211398	-21	kworker/2:1+events	20:44:29	2
2186617	99	2355	12,2340	cyclictest	2241415	-21	kworker/2:0+events	22:04:26	2
2186617	99	2349	12,2334	cyclictest	2225561	-21	kworker/2:1+events	21:34:24	2
2186613	99	2334	11,2319	cyclictest	2231775	-21	kworker/1:0+events	21:33:16	1
2186617	99	2332	11,2318	cyclictest	2241415	-21	kworker/2:0+events	22:06:21	2
2186613	99	2329	3,2323	cyclictest	2209831	-21	kworker/1:2+events	20:25:30	1
2186611	99	2323	11,2308	cyclictest	2262377	-21	kworker/0:2+events	23:05:42	0
2186611	99	2321	11,2307	cyclictest	2260634	-21	kworker/0:1+events	23:02:37	0
2186617	99	2320	11,2306	cyclictest	2220737	-21	kworker/2:1+events	20:56:22	2
2186613	99	2320	10,2306	cyclictest	2184520	-21	kworker/1:1+events	19:25:18	1
2186621	99	2318	12,2304	cyclictest	2276859	-21	kworker/3:0+events	00:15:32	3
2186621	99	2318	12,2304	cyclictest	2276859	-21	kworker/3:0+events	00:15:32	3
2186613	99	2314	11,2299	cyclictest	2280307	-21	kworker/1:3+events	00:20:08	1
2186613	99	2314	11,2299	cyclictest	2280307	-21	kworker/1:3+events	00:20:08	1
2186613	99	2309	9,2297	cyclictest	2251239	-21	kworker/1:2+events	22:47:48	1
2186611	99	2302	10,2289	cyclictest	2237814	-21	kworker/0:1+events	21:46:38	0
2186621	99	2299	11,2284	cyclictest	2220855	-21	kworker/3:1+events	21:53:00	3
2186617	99	2296	12,2280	cyclictest	2281709	-21	kworker/2:0+events	00:13:17	2
2186621	99	2287	11,2272	cyclictest	2199534	-21	kworker/3:2+events	19:48:21	3
2186621	99	2286	10,2273	cyclictest	2214539	-21	kworker/3:0+events	20:38:01	3
2186611	99	2285	12,2270	cyclictest	2291288	-21	kworker/0:2+events	00:36:02	0
2186613	99	2282	12,2267	cyclictest	2225652	-21	kworker/1:1+events	21:13:30	1
2186611	99	2280	11,2265	cyclictest	2187891	-21	kworker/0:1+events	20:08:39	0
2186611	99	2280	11,2265	cyclictest	2187891	-21	kworker/0:1+events	20:08:39	0
2186613	99	2272	12,2257	cyclictest	2280307	-21	kworker/1:3+events	00:19:22	1
2186613	99	2272	12,2257	cyclictest	2280307	-21	kworker/1:3+events	00:19:22	1
2186613	99	2270	11,2255	cyclictest	2225652	-21	kworker/1:1+events	21:27:27	1
2186613	99	2267	10,2254	cyclictest	2267367	-21	kworker/1:2+events	23:18:44	1
2186611	99	2266	10,2253	cyclictest	2190195	-21	kworker/0:2+events	19:20:44	0
2186621	99	2264	11,2249	cyclictest	2220855	-21	kworker/3:1+events	21:01:21	3
2186613	99	2264	10,2251	cyclictest	2222368	-21	kworker/1:2+events	21:04:45	1
2186611	99	2264	11,2250	cyclictest	2247410	-21	kworker/0:1+events	22:23:04	0
2186617	99	2259	11,2245	cyclictest	2225561	-21	kworker/2:1+events	21:38:15	2
2186613	99	2257	12,2242	cyclictest	2262540	-21	kworker/1:1+events	23:06:49	1
2186611	99	2252	10,2239	cyclictest	2214304	-21	kworker/0:1+events	20:37:14	0
2186611	99	2251	11,2235	cyclictest	2283525	-21	kworker/0:1+events	00:12:09	0
2186621	99	2245	11,2231	cyclictest	2249694	-21	kworker/3:0+events	22:25:22	3
2186613	99	2244	10,2231	cyclictest	2280307	-21	kworker/1:3+events	00:13:38	1
2186617	99	2242	10,2228	cyclictest	2236444	-21	kworker/2:2+events	22:21:57	2
2186621	99	2239	10,2225	cyclictest	2289748	-21	kworker/3:1+events	00:33:45	3
2186617	99	2236	9,2224	cyclictest	2198113	-21	kworker/2:2+events	19:52:31	2
2186617	99	2234	11,2221	cyclictest	2257460	-21	kworker/2:2+events	22:52:21	2
2186621	99	2233	11,2219	cyclictest	2272013	-21	kworker/3:1+events	23:36:52	3
2186621	99	2233	10,2220	cyclictest	2276859	-21	kworker/3:0+events	23:48:34	3
2186621	99	2230	11,2216	cyclictest	2225385	-21	kworker/3:0+events	21:10:26	3
2186621	99	2229	10,2216	cyclictest	2258612	-21	kworker/3:0+events	22:57:41	3
2186621	99	2229	10,2216	cyclictest	2234779	-21	kworker/3:0+events	21:39:47	3
2186621	99	2228	11,2214	cyclictest	2251301	-21	kworker/3:1+events	22:39:48	3
2186621	99	2228	11,2214	cyclictest	2219191	-21	kworker/3:0+events	20:54:27	3
2186613	99	2228	10,2214	cyclictest	2212628	-21	kworker/1:0+events	20:34:13	1
2186621	99	2227	9,2214	cyclictest	2220855	-21	kworker/3:1+events	21:21:45	3
2186621	99	2227	8,2216	cyclictest	2284915	-21	kworker/3:1+events	00:22:23	3
2186621	99	2227	8,2216	cyclictest	2284915	-21	kworker/3:1+events	00:22:23	3
2186621	99	2227	8,2216	cyclictest	2193326	-21	kworker/3:1+events	19:39:12	3
2186621	99	2227	11,2212	cyclictest	2204814	-21	kworker/3:2+events	20:19:47	3
2186621	99	2226	13,2209	cyclictest	2256339	-21	kworker/3:2+events	22:48:58	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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