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2025-07-15 - 22:29

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #6

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 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackeslot6s.osadl.org (updated Tue Jul 15, 2025 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1170807997527,40cyclictest1172676-21grep07:15:322
1170807996716,23cyclictest1220535-21/usr/sbin/munin12:00:192
1170807996622,36cyclictest1191274-21grep09:05:302
1170807996622,36cyclictest1191274-21grep09:05:302
1170803996648,13cyclictest131ktimers/011:15:140
1170807996321,33cyclictest0-21swapper/208:45:302
1170805996253,4cyclictest231ktimers/110:10:011
117080799611,6cyclictest1222372-21df_inode12:10:222
1170805996151,5cyclictest1187121-21munin-plugin-st08:45:011
1170807996021,30cyclictest0-21swapper/210:20:292
1170807996012,6cyclictest0-21swapper/208:30:272
1170803996024,23cyclictest12-21ksoftirqd/009:40:020
117080799592,16cyclictest1177179-21apt-get07:45:182
117080799592,16cyclictest1177179-21apt-get07:45:182
1170807995822,27cyclictest0-21swapper/210:30:292
117080799573,17cyclictest1188967-21latency_hist08:55:002
1170807995722,7cyclictest1218837-21/usr/sbin/munin11:50:352
117080799572,21cyclictest0-21swapper/211:40:292
1170807995718,6cyclictest1666-21snmpd12:35:362
1170807995718,4cyclictest0-21swapper/210:55:312
1170807995715,6cyclictest0-21swapper/208:35:272
1170803995739,11cyclictest131ktimers/007:45:140
1170803995739,11cyclictest131ktimers/007:45:140
1170807995620,29cyclictest0-21swapper/207:55:322
1170807995614,4cyclictest0-21swapper/211:30:212
1170807995523,28cyclictest168450irq/135-8000000.ethernet-tx212:20:192
117080799552,17cyclictest1183704-21sed08:20:302
1170807995517,3cyclictest0-21swapper/210:45:272
1170805995516,20cyclictest1191626-21/usr/sbin/munin09:10:191
117080799545,13cyclictest0-21swapper/208:55:292
1170807995423,6cyclictest0-21swapper/209:10:282
1170807995420,29cyclictest0-21swapper/209:15:232
1170807995417,4cyclictest0-21swapper/208:10:002
1170807995414,7cyclictest0-21swapper/209:55:292
117080399546,23cyclictest0-21swapper/007:25:010
117080399543,30cyclictest12-21ksoftirqd/008:30:010
117080399543,30cyclictest12-21ksoftirqd/008:30:010
1170807995315,4cyclictest0-21swapper/211:20:012
1170807995314,9cyclictest0-21swapper/210:00:222
1170807995217,4cyclictest0-21swapper/210:40:302
1170807995217,4cyclictest0-21swapper/207:35:262
1170807995216,30cyclictest1182033-21latency_hist08:15:002
1170807995215,4cyclictest0-21swapper/207:25:312
1170807995214,6cyclictest0-21swapper/209:45:292
1170807995214,6cyclictest0-21swapper/209:45:292
1170807995211,9cyclictest0-21swapper/207:20:212
1170805995242,6cyclictest1210017-21tr11:00:011
117080799517,12cyclictest1217998-21/usr/sbin/munin11:45:172
1170807995118,4cyclictest1226273-21head12:30:292
1170807995118,4cyclictest1226273-21head12:30:292
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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