You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2023-05-31 - 03:06

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

Latency plot of system in rack #d, slot #4
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 highest latencies:
System rackdslot4.osadl.org (updated Tue May 30, 2023 12:46:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
807421490,8sleep01254599cyclictest11:35:340
12155211585,15sleep00-21swapper/007:08:480
12155211585,15sleep00-21swapper/007:08:480
129991960,4ptp4l401ktimersoftd/307:08:353
129991960,4ptp4l401ktimersoftd/307:08:353
261522880,8sleep21254799cyclictest12:15:202
56498870,19rtkit-daemon1258-21lldpd07:09:151
56498870,19rtkit-daemon1258-21lldpd07:09:151
129991790,2ptp4l391rcuc/312:15:183
1254699679,11cyclictest1258-21lldpd10:55:271
90862660,6sleep00-21swapper/009:20:220
1254699668,10cyclictest1258-21lldpd08:55:441
56498640,2rtkit-daemon0-21swapper/007:22:550
1254699617,11cyclictest1258-21lldpd08:28:391
56498600,2rtkit-daemon0-21swapper/007:15:440
1254699607,12cyclictest1258-21lldpd10:38:251
1254699607,11cyclictest1242-21snmpd09:34:431
4732590,5sleep3391rcuc/309:00:343
1254699597,11cyclictest30827-21diskstats12:25:231
1254599562,17cyclictest64-21kswapd012:10:160
1254699520,11cyclictest1242-21snmpd11:16:081
1254699518,20cyclictest1258-21lldpd09:24:071
1254699500,5cyclictest1242-21snmpd11:03:061
1254699496,11cyclictest1242-21snmpd12:39:221
1254799485,3cyclictest121rcu_preempt10:11:222
1254599471,8cyclictest121rcu_preempt11:22:020
129991460,1ptp4l401ktimersoftd/311:47:323
129991450,1ptp4l401ktimersoftd/311:35:273
129991450,1ptp4l401ktimersoftd/309:21:233
12547994533,10cyclictest33-21ksoftirqd/209:49:432
12545994539,3cyclictest9-21ksoftirqd/007:30:330
12545994538,4cyclictest9-21ksoftirqd/008:40:340
129991440,1ptp4l401ktimersoftd/311:16:123
1254699445,10cyclictest1242-21snmpd10:16:471
1254599441,3cyclictest121rcu_preempt10:45:040
129991430,1ptp4l401ktimersoftd/311:31:493
1254799432,35cyclictest13772-21apt-get10:40:152
12546994337,4cyclictest25-21ksoftirqd/110:10:001
1254599430,3cyclictest121rcu_preempt11:55:270
2242624235,3sleep233-21ksoftirqd/212:05:332
1254899422,33cyclictest32762-21apt-get12:30:173
1254899422,33cyclictest30441-21apt-get12:25:203
1254899422,32cyclictest4026-21apt-get09:10:203
1254899422,32cyclictest4026-21apt-get09:10:193
1254899420,26cyclictest0-21swapper/308:55:323
12547994235,5cyclictest33-21ksoftirqd/209:35:462
1254799422,34cyclictest16118-21apt-get10:45:172
12546994236,3cyclictest25-21ksoftirqd/112:00:401
12546994236,3cyclictest25-21ksoftirqd/109:35:531
12546994236,3cyclictest25-21ksoftirqd/109:15:161
12546994235,4cyclictest25-21ksoftirqd/108:45:341
1254699423,4cyclictest121rcu_preempt09:55:091
323224134,3sleep341-21ksoftirqd/312:35:223
12548994134,4cyclictest41-21ksoftirqd/310:35:183
1254799414,32cyclictest0-21swapper/212:25:192
12547994135,3cyclictest33-21ksoftirqd/207:38:272
12546994134,4cyclictest25-21ksoftirqd/112:18:281
12545994136,3cyclictest9-21ksoftirqd/007:55:270
12545994133,4cyclictest9-21ksoftirqd/008:05:140
12545994133,4cyclictest9-21ksoftirqd/008:05:140
1200824111,19sleep20-21swapper/207:06:542
1200824111,19sleep20-21swapper/207:06:532
12548994034,3cyclictest41-21ksoftirqd/310:11:303
12548994033,4cyclictest41-21ksoftirqd/310:59:323
12547994034,3cyclictest33-21ksoftirqd/211:32:192
12547994030,7cyclictest1209-21runrttasks10:32:222
1254799402,32cyclictest25438-21apt-get11:05:152
12546994033,4cyclictest25-21ksoftirqd/112:34:421
12546994033,4cyclictest25-21ksoftirqd/109:04:541
12545994033,4cyclictest9-21ksoftirqd/009:48:490
12545994033,4cyclictest9-21ksoftirqd/008:17:430
12545994033,4cyclictest9-21ksoftirqd/007:50:190
110082400,3sleep31254899cyclictest11:40:403
194482390,5sleep11258-21lldpd09:40:321
12548993933,4cyclictest41-21ksoftirqd/309:57:033
12548993933,3cyclictest41-21ksoftirqd/309:15:393
12548993933,3cyclictest41-21ksoftirqd/308:48:423
12548993932,4cyclictest41-21ksoftirqd/312:21:233
12548993932,4cyclictest41-21ksoftirqd/312:14:043
12548993932,4cyclictest41-21ksoftirqd/310:50:283
12548993932,4cyclictest41-21ksoftirqd/310:22:103
12548993932,4cyclictest41-21ksoftirqd/310:22:093
12548993932,4cyclictest41-21ksoftirqd/308:40:303
12548993932,4cyclictest41-21ksoftirqd/307:57:583
12548993932,4cyclictest41-21ksoftirqd/307:40:323
1254899392,30cyclictest0-21swapper/310:45:173
12547993934,3cyclictest33-21ksoftirqd/208:52:492
1254799393,29cyclictest25468-21sed08:45:242
12547993932,4cyclictest33-21ksoftirqd/209:28:282
12547993932,4cyclictest33-21ksoftirqd/208:56:592
12547993932,4cyclictest33-21ksoftirqd/207:17:002
1254799392,31cyclictest0-21swapper/209:10:202
1254799392,31cyclictest0-21swapper/209:10:192
12546993932,4cyclictest25-21ksoftirqd/108:24:511
12546993922,10cyclictest10673-21apt-get08:15:171
1254699390,3cyclictest121rcu_preempt07:31:041
12545993932,4cyclictest9-21ksoftirqd/011:54:330
1254599391,4cyclictest121rcu_preempt07:36:110
1254599391,3cyclictest121rcu_preempt07:13:580
1254599390,3cyclictest121rcu_preempt09:31:360
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional