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2023-03-22 - 03:24

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, highest latencies:
System rackdslot3.osadl.org (updated Wed Mar 22, 2023 00:46:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8255911840,6ptp4l401ktimersoftd/319:09:573
8255911840,6ptp4l401ktimersoftd/319:09:573
2600321840,6sleep22451399cyclictest21:30:212
2401328313,18sleep10-21swapper/119:07:161
2401328313,18sleep10-21swapper/119:07:161
825591760,9ptp4l401ktimersoftd/319:10:013
825591760,9ptp4l401ktimersoftd/319:10:013
270652760,2sleep10-21swapper/123:50:211
240222724,19sleep00-21swapper/019:07:230
240222724,19sleep00-21swapper/019:07:230
193492700,4sleep119350-21sh23:35:001
284422670,8sleep12451299cyclictest20:25:361
230622670,3sleep233-21ksoftirqd/220:15:182
85772650,8sleep12451299cyclictest22:00:341
240962656,46sleep20-21swapper/219:08:222
240962656,46sleep20-21swapper/219:08:222
825591600,1ptp4l391rcuc/321:37:023
24512995649,4cyclictest8483-21idleruntime-cro00:19:591
24513995231,18cyclictest33-21ksoftirqd/220:55:032
24513995129,19cyclictest33-21ksoftirqd/220:43:042
24513995129,19cyclictest33-21ksoftirqd/219:39:042
24512995044,3cyclictest25-21ksoftirqd/120:20:001
208332500,2sleep00-21swapper/023:35:310
825591490,1ptp4l401ktimersoftd/319:40:353
24511994942,4cyclictest1712-21idleruntime-cro20:40:000
2451399463,37cyclictest28970-21apt-get23:55:152
24513994526,16cyclictest33-21ksoftirqd/222:01:522
825591440,1ptp4l401ktimersoftd/319:46:463
2451399443,35cyclictest14799-21apt-get23:25:162
8259914336,3phc2sys41-21ksoftirqd/320:05:183
825591430,1ptp4l401ktimersoftd/323:40:173
825591430,1ptp4l401ktimersoftd/323:36:283
825591430,1ptp4l401ktimersoftd/323:25:223
2451399433,34cyclictest19659-21apt-get23:35:182
24511994336,4cyclictest9-21ksoftirqd/021:50:000
24514994234,5cyclictest15795-21sh21:10:003
2451399424,31cyclictest4122-21apt-get00:10:162
2451399422,33cyclictest18949-21apt-get22:25:222
24513994215,24cyclictest734-21sed19:25:312
2451399420,6cyclictest14517-21basename19:55:272
24512994235,4cyclictest25-21ksoftirqd/122:40:011
24512994235,4cyclictest25-21ksoftirqd/122:00:001
24512994235,4cyclictest25-21ksoftirqd/120:04:591
24512994234,4cyclictest25-21ksoftirqd/119:12:591
24512994234,4cyclictest25-21ksoftirqd/119:12:591
2451399413,34cyclictest0-21swapper/220:50:162
2451399413,32cyclictest16633-21apt-get22:20:232
24512994134,4cyclictest25-21ksoftirqd/122:05:071
24512994134,4cyclictest25-21ksoftirqd/119:35:341
2451499402,29cyclictest631-21apt-get00:01:333
2451499402,29cyclictest26930-21apt-get19:15:163
2451399403,32cyclictest0-21swapper/200:01:332
2451399402,8cyclictest4461-21apt-get20:45:122
2451399402,31cyclictest22000-21apt-get23:40:172
24513994014,23cyclictest21486-21expr22:30:192
2451399401,35cyclictest9712-21cut19:45:292
2451399400,5cyclictest31262-21taskset19:24:472
2451399400,4cyclictest18332-21fschecks_count20:05:182
2451399400,4cyclictest11186-21awk23:15:272
24512994033,4cyclictest25-21ksoftirqd/123:15:141
52052390,8sleep02451199cyclictest21:55:190
2451499392,28cyclictest26654-21apt-get23:50:183
24514993922,14cyclictest41-21ksoftirqd/319:29:503
2451499390,5cyclictest25839-21sed23:45:393
2451399394,29cyclictest23087-21apt-get21:25:162
24513993933,3cyclictest33-21ksoftirqd/220:27:322
2451399393,31cyclictest27736-21apt-get21:35:132
2451399393,31cyclictest11326-21apt-get00:25:132
2451399393,30cyclictest0-21swapper/222:40:152
2451399392,32cyclictest0-21swapper/219:15:152
2451399392,31cyclictest11456-21apt-get21:00:122
2451399392,31cyclictest10933-21apt-get19:50:122
2451399392,10cyclictest20240-21apt-get20:10:122
24513993913,23cyclictest6904-21grep00:15:202
24513993913,22cyclictest13858-21seq00:30:172
2451399390,4cyclictest30765-21cpuspeed_turbos22:50:232
2451399390,4cyclictest25180-21basename19:10:192
2451399390,4cyclictest25180-21basename19:10:192
24512993934,3cyclictest25-21ksoftirqd/122:30:251
24512993932,4cyclictest25-21ksoftirqd/122:21:181
24512993932,4cyclictest25-21ksoftirqd/119:25:151
24512993931,5cyclictest25-21ksoftirqd/121:19:571
24514993831,4cyclictest41-21ksoftirqd/320:13:343
2451499382,29cyclictest0-21swapper/319:50:123
2451499381,30cyclictest0-21swapper/322:25:213
2451499381,30cyclictest0-21swapper/320:40:123
2451499380,4cyclictest63662sleep320:48:393
2451499380,4cyclictest29725-21fschecks_count19:20:233
2451499380,4cyclictest20694-21/usr/sbin/munin21:20:273
2451399383,30cyclictest0-21swapper/223:50:182
2451399383,30cyclictest0-21swapper/221:10:172
2451399382,30cyclictest2947-21apt-get23:00:142
2451399382,29cyclictest11957-21apt-get22:10:152
2451399381,4cyclictest9857-21cat23:15:002
2451399381,34cyclictest31344-21grep20:30:312
24513993811,23cyclictest25484-21seq22:38:322
24513993810,25cyclictest11689-21idleruntime-cro22:10:002
24513993810,25cyclictest10931-21latency_hist00:25:002
2451399380,5cyclictest17298-21runrttasks20:01:032
2451399380,4cyclictest25441-21/usr/sbin/munin20:20:222
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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