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2021-09-28 - 16:12

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #3

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 
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AMD Eng Sample: ZM3301C3T4MFB_36/33_N, Linux 4.18.7-rt5 (Profile)

Latency plot of shadow in rack #c, 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 -Sp99 -i200 -h400 -q
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 50 highest latencies:
System rackcslot3s (updated Tue Sep 28, 2021 12:50:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
43042656635,15sleep10-21swapper/107:07:111
42472612590,15sleep00-21swapper/007:06:220
44592530509,15sleep70-21swapper/707:09:277
43632527504,15sleep40-21swapper/407:08:024
43142508486,15sleep20-21swapper/207:07:202
43532507488,14sleep30-21swapper/307:07:543
42612473452,15sleep50-21swapper/507:06:355
43922469449,14sleep60-21swapper/607:08:286
493799110109,0cyclictest2856-21sh12:40:001
4937999825,1cyclictest277-21systemd-journal11:45:001
4936997574,0cyclictest2859-21cron12:40:000
4937997270,1cyclictest6029-21sh11:39:591
4940996058,1cyclictest7187-21cpuspeed_turbos08:20:144
4939995756,0cyclictest3640-21sh11:34:593
4937995610,34cyclictest0-21swapper/110:05:391
4943994947,1cyclictest17041-21tail07:30:377
4939994948,0cyclictest21363-21grep09:55:173
4936994925,23cyclictest19053-21tr12:05:160
4941994846,1cyclictest21315-21grep09:55:185
4942994745,1cyclictest17039-21grep07:30:376
4937994745,1cyclictest18036-21tr07:35:161
4943994543,1cyclictest30870-21cpuspeed_turbos10:15:157
4941994543,1cyclictest1928-21switchtime10:20:315
4937994514,24cyclictest0-21swapper/109:50:211
4943994443,0cyclictest32397-21cpuspeed_turbos08:05:207
4943994443,0cyclictest32397-21cpuspeed_turbos08:05:207
4939994442,1cyclictest30894-21latency_hist09:10:003
4938994442,1cyclictest22432-21cpuspeed_turbos11:05:172
493799449,23cyclictest0-21swapper/109:44:301
4937994431,6cyclictest0-21swapper/109:47:151
4942994341,1cyclictest30869-21grep10:15:146
493799432,30cyclictest0-21swapper/109:55:201
4937994315,16cyclictest0-21swapper/110:56:551
4941994240,1cyclictest13594-21sh11:55:005
4940994241,0cyclictest31313-21cron11:25:004
4939994241,0cyclictest19997-21cat07:40:003
4937994218,14cyclictest0-21swapper/111:07:111
4941994139,1cyclictest22451-21cpuspeed_turbos11:05:175
4941994139,1cyclictest1103-21grep12:35:175
4938994035,4cyclictest0-21swapper/212:30:322
4938994028,8cyclictest13295-21unixbench_multi08:30:352
493799406,21cyclictest0-21swapper/109:30:461
493799403,7cyclictest111rcu_preempt12:17:311
4936994038,1cyclictest17525-21latency_hist07:35:010
4936994038,1cyclictest17294-21strings09:45:240
4942993937,1cyclictest15076-21grep11:55:356
4941993937,1cyclictest15337-21wc07:30:015
4941993937,1cyclictest0-21swapper/511:20:175
4939993937,1cyclictest29034-21unixbench_singl07:55:423
493799398,15cyclictest0-21swapper/110:30:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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