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2026-03-20 - 06:08
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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 rackcslot8.osadl.org (updated Fri Mar 20, 2026 00:49:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3273913190,311ptp4l0-21swapper/119:05:471
219779928790,1cyclictest1901rcuc/2922:46:3322
219779928790,1cyclictest1901rcuc/2922:46:3322
218669928082,1cyclictest151rcu_preempt22:56:0730
218579922225,1cyclictest151rcu_preempt22:00:1129
218579922225,1cyclictest151rcu_preempt22:00:1129
204922219212,6sleep250-21swapper/2519:07:3818
218409921227,99cyclictest0-21swapper/422:45:2326
218409921227,99cyclictest0-21swapper/422:45:2226
219469920714,135cyclictest0-21swapper/2121:48:4014
219469920714,135cyclictest0-21swapper/2121:48:4014
219829916531,95cyclictest0-21swapper/3022:21:5624
219829916531,95cyclictest0-21swapper/3022:21:5524
219829915726,94cyclictest0-21swapper/3021:10:2024
219829915625,82cyclictest0-21swapper/3021:27:5824
21818991545,145cyclictest0-21swapper/023:23:500
219639915119,31cyclictest0-21swapper/2521:11:0218
219829914927,77cyclictest0-21swapper/3000:37:4224
219829914927,73cyclictest0-21swapper/3019:40:0124
219469914915,132cyclictest0-21swapper/2122:41:3414
219469914915,132cyclictest0-21swapper/2122:41:3414
219469914815,131cyclictest0-21swapper/2121:27:4814
219469914814,117cyclictest0-21swapper/2122:31:2514
219469914814,117cyclictest0-21swapper/2122:31:2414
218919914721,95cyclictest0-21swapper/1220:50:164
219829914624,78cyclictest0-21swapper/3023:30:2224
21963991460,88cyclictest0-21swapper/2523:15:1918
219469914614,131cyclictest0-21swapper/2122:13:4714
219469914614,131cyclictest0-21swapper/2122:13:4714
219469914515,127cyclictest0-21swapper/2100:35:1314
21891991440,85cyclictest0-21swapper/1222:20:244
21891991440,85cyclictest0-21swapper/1222:20:244
219469914314,128cyclictest0-21swapper/2123:40:2214
21891991420,85cyclictest0-21swapper/1222:32:544
21891991420,85cyclictest0-21swapper/1222:32:544
219639914146,61cyclictest0-21swapper/2523:55:2418
21891991400,83cyclictest0-21swapper/1221:40:204
21891991400,83cyclictest0-21swapper/1221:40:204
21891991390,82cyclictest0-21swapper/1223:30:244
21891991390,82cyclictest0-21swapper/1223:18:064
218279913923,85cyclictest0-21swapper/221:12:3212
21818991390,99cyclictest0-21swapper/021:15:460
21818991390,99cyclictest0-21swapper/021:15:450
21818991390,83cyclictest0-21swapper/023:45:420
219639913846,61cyclictest0-21swapper/2521:27:0518
219639913841,63cyclictest0-21swapper/2500:38:4018
219469913814,78cyclictest0-21swapper/2121:40:0714
219469913814,78cyclictest0-21swapper/2121:40:0714
218919913850,56cyclictest0-21swapper/1219:11:284
218919913848,55cyclictest0-21swapper/1219:20:174
218919913842,61cyclictest0-21swapper/1222:50:184
218919913842,61cyclictest0-21swapper/1222:50:184
21891991380,85cyclictest0-21swapper/1222:29:444
21891991380,85cyclictest0-21swapper/1222:29:444
21891991380,80cyclictest0-21swapper/1221:21:034
21891991380,80cyclictest0-21swapper/1221:21:024
219639913752,59cyclictest0-21swapper/2522:13:0518
219639913752,59cyclictest0-21swapper/2522:13:0518
219639913749,57cyclictest0-21swapper/2521:57:4918
219639913749,57cyclictest0-21swapper/2521:57:4918
218919913745,57cyclictest0-21swapper/1223:08:324
21891991370,82cyclictest0-21swapper/1223:55:024
21891991370,81cyclictest0-21swapper/1220:15:194
21982991360,85cyclictest0-21swapper/3023:18:5424
219639913651,56cyclictest0-21swapper/2521:42:0318
219639913651,56cyclictest0-21swapper/2521:42:0318
219639913647,61cyclictest0-21swapper/2500:14:0618
219639913627,65cyclictest0-21swapper/2520:06:0618
218919913630,63cyclictest0-21swapper/1222:35:214
218919913630,63cyclictest0-21swapper/1222:35:214
218919913628,71cyclictest0-21swapper/1221:37:044
218919913628,71cyclictest0-21swapper/1221:37:044
218279913621,93cyclictest0-21swapper/223:23:2712
218189913629,65cyclictest0-21swapper/023:25:230
219639913539,71cyclictest0-21swapper/2521:38:3418
219639913539,71cyclictest0-21swapper/2521:38:3318
219639913530,74cyclictest0-21swapper/2500:09:4918
218919913551,59cyclictest0-21swapper/1221:18:074
218919913551,59cyclictest0-21swapper/1221:18:074
218919913527,63cyclictest0-21swapper/1200:17:414
219639913453,60cyclictest0-21swapper/2522:36:5018
219639913453,60cyclictest0-21swapper/2522:36:5018
219639913448,61cyclictest0-21swapper/2500:21:3418
219639913447,58cyclictest0-21swapper/2521:22:3218
219639913447,58cyclictest0-21swapper/2521:22:3218
219639913444,59cyclictest0-21swapper/2522:27:1318
219639913444,59cyclictest0-21swapper/2522:27:1318
219639913430,67cyclictest0-21swapper/2521:52:2818
219639913430,67cyclictest0-21swapper/2521:52:2718
219639913429,74cyclictest0-21swapper/2521:17:1218
219639913429,74cyclictest0-21swapper/2521:17:1118
219639913429,66cyclictest0-21swapper/2521:07:4918
218919913425,64cyclictest0-21swapper/1223:45:214
21891991340,79cyclictest0-21swapper/1223:35:434
21891991340,79cyclictest0-21swapper/1222:16:224
21891991340,79cyclictest0-21swapper/1222:16:224
21891991340,79cyclictest0-21swapper/1219:35:154
218279913423,70cyclictest0-21swapper/221:18:0712
218279913423,70cyclictest0-21swapper/221:18:0712
219639913349,61cyclictest0-21swapper/2523:40:2618
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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