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2023-02-07 - 18:44

x86 Intel Atom E3845 @1910 MHz, Linux 4.19.37-rt19 (Profile)

Latency plot of system in rack #d, slot #3
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Up99 -i200 -h400 --smi -q
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Characteristics of the 100, Linux 4.9.20-rt16, x86_64 highest latencies:
System rackdslot3.osadl.org (updated Tue Feb 07, 2023 12:46:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1044521720,8sleep32003399cyclictest07:55:343
8255911600,5ptp4l401ktimersoftd/307:05:513
195382137115,9sleep10-21swapper/107:07:271
19403210784,10sleep20-21swapper/207:05:422
20032997870,4cyclictest33-21ksoftirqd/211:35:202
20032997769,4cyclictest33-21ksoftirqd/209:45:202
20032997769,4cyclictest33-21ksoftirqd/208:15:212
20032997769,4cyclictest33-21ksoftirqd/208:15:212
20032997768,5cyclictest33-21ksoftirqd/209:50:162
20032997768,5cyclictest33-21ksoftirqd/209:25:222
20032997768,5cyclictest33-21ksoftirqd/208:30:212
825591760,1ptp4l401ktimersoftd/310:11:253
20032997642,4cyclictest33-21ksoftirqd/211:10:412
20032997642,4cyclictest33-21ksoftirqd/211:10:402
20032997566,5cyclictest33-21ksoftirqd/211:55:212
20032997566,5cyclictest33-21ksoftirqd/209:40:172
20032997566,5cyclictest33-21ksoftirqd/209:40:172
20032997565,6cyclictest33-21ksoftirqd/207:40:152
20031997336,8cyclictest25-21ksoftirqd/112:00:221
20031997335,6cyclictest25-21ksoftirqd/109:40:001
206282720,3sleep020627-21wc08:20:000
206282720,3sleep020627-21wc08:19:590
20032997236,9cyclictest33-21ksoftirqd/211:15:402
20032997233,4cyclictest33-21ksoftirqd/207:17:002
20031997237,7cyclictest25-21ksoftirqd/109:20:311
20031997236,7cyclictest25-21ksoftirqd/107:50:241
20031997234,11cyclictest25-21ksoftirqd/109:04:591
20032997160,6cyclictest33-21ksoftirqd/208:05:162
20032997158,8cyclictest33-21ksoftirqd/210:20:162
20031997136,7cyclictest25-21ksoftirqd/109:30:351
20031997136,7cyclictest25-21ksoftirqd/108:50:251
20031997135,8cyclictest25-21ksoftirqd/108:05:301
20031997134,5cyclictest25-21ksoftirqd/111:20:251
20031997130,5cyclictest25-21ksoftirqd/108:35:341
20033997055,9cyclictest41-21ksoftirqd/310:45:213
20032997061,5cyclictest33-21ksoftirqd/212:05:172
20032997037,5cyclictest33-21ksoftirqd/212:35:342
20032997037,5cyclictest33-21ksoftirqd/212:35:342
20032997030,11cyclictest33-21ksoftirqd/207:35:182
20031997034,8cyclictest25-21ksoftirqd/111:40:281
20031997034,7cyclictest25-21ksoftirqd/110:35:181
20031997033,5cyclictest25-21ksoftirqd/112:05:321
20031997031,10cyclictest25-21ksoftirqd/108:15:011
20031997031,10cyclictest25-21ksoftirqd/108:15:001
20031996935,7cyclictest25-21ksoftirqd/111:50:361
20031996934,7cyclictest25-21ksoftirqd/108:25:251
20031996934,7cyclictest25-21ksoftirqd/107:25:361
20031996933,7cyclictest25-21ksoftirqd/109:55:331
20031996933,7cyclictest25-21ksoftirqd/109:50:311
20031996932,8cyclictest25-21ksoftirqd/107:20:281
20032996857,5cyclictest33-21ksoftirqd/208:00:192
20031996834,7cyclictest25-21ksoftirqd/110:25:341
20031996834,7cyclictest25-21ksoftirqd/108:05:001
20031996834,7cyclictest25-21ksoftirqd/107:40:231
20031996833,7cyclictest25-21ksoftirqd/112:25:331
20031996833,7cyclictest25-21ksoftirqd/110:30:291
20031996832,8cyclictest25-21ksoftirqd/109:15:371
20031996832,5cyclictest25-21ksoftirqd/112:20:351
20031996831,7cyclictest25-21ksoftirqd/107:20:011
20032996757,5cyclictest33-21ksoftirqd/210:55:192
20032996723,11cyclictest33-21ksoftirqd/212:20:282
20031996733,8cyclictest25-21ksoftirqd/112:35:221
20031996733,8cyclictest25-21ksoftirqd/112:35:221
20031996733,7cyclictest25-21ksoftirqd/110:20:211
20031996732,7cyclictest25-21ksoftirqd/111:30:331
20031996732,7cyclictest25-21ksoftirqd/110:45:011
20031996731,5cyclictest25-21ksoftirqd/111:55:361
20031996730,11cyclictest25-21ksoftirqd/109:40:181
20031996730,11cyclictest25-21ksoftirqd/109:40:171
20031996730,11cyclictest25-21ksoftirqd/107:55:311
825591660,2ptp4l401ktimersoftd/312:20:373
20032996633,4cyclictest33-21ksoftirqd/212:00:302
20032996633,4cyclictest33-21ksoftirqd/208:35:272
20032996631,4cyclictest33-21ksoftirqd/207:20:402
20032996624,9cyclictest33-21ksoftirqd/207:15:002
20031996632,9cyclictest25-21ksoftirqd/108:45:011
20031996632,5cyclictest25-21ksoftirqd/109:00:011
20031996631,7cyclictest25-21ksoftirqd/112:15:421
20031996631,7cyclictest25-21ksoftirqd/108:20:271
20031996631,5cyclictest25-21ksoftirqd/109:10:231
20031996631,10cyclictest25-21ksoftirqd/109:25:341
20031996630,10cyclictest25-21ksoftirqd/111:35:211
20031996630,10cyclictest25-21ksoftirqd/110:55:311
20031996628,10cyclictest25-21ksoftirqd/110:00:201
20032996531,4cyclictest33-21ksoftirqd/210:50:292
20032996525,7cyclictest33-21ksoftirqd/211:40:302
20032996524,10cyclictest33-21ksoftirqd/208:50:242
2003199655,10cyclictest25-21ksoftirqd/110:50:001
20031996532,4cyclictest25-21ksoftirqd/109:50:011
20031996531,7cyclictest25-21ksoftirqd/107:45:211
20031996529,8cyclictest25-21ksoftirqd/108:15:381
20031996529,8cyclictest25-21ksoftirqd/108:15:371
20031996529,11cyclictest25-21ksoftirqd/107:30:291
20031996529,10cyclictest25-21ksoftirqd/112:10:341
20031996528,7cyclictest25-21ksoftirqd/107:15:001
20032996431,5cyclictest33-21ksoftirqd/209:00:372
20032996430,4cyclictest33-21ksoftirqd/208:25:202
2003299642,8cyclictest33-21ksoftirqd/210:15:002
20032996425,11cyclictest33-21ksoftirqd/211:50:012
20031996430,10cyclictest25-21ksoftirqd/111:30:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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