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2026-03-29 - 05:02

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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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Click here to display the system's profile data or here to proceed to next system.
Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
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 100 highest latencies:
System rack2slot7s.osadl.org (updated Sun Mar 29, 2026 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1142766997251,11cyclictest12350irq/32-eth022:10:320
1142766995616,7cyclictest12450irq/33-eth021:20:320
1142768995326,23cyclictest1155639-21ntp_kernel_pll_19:50:292
1142767995332,11cyclictest1178734-21diskmemload22:45:341
114276799524,34cyclictest421-21dbus-daemon00:00:311
1142767995241,4cyclictest0-21swapper/121:35:341
1142767995241,4cyclictest0-21swapper/121:35:341
1142766995229,20cyclictest1319606-21cupsd00:29:520
1142768995127,21cyclictest1157731-21munin-plugin-st20:00:012
1142768995044,3cyclictest0-21swapper/221:00:012
1142767995034,9cyclictest624-21lldpd22:15:281
1142767995033,8cyclictest0-21swapper/122:10:301
1142768994924,22cyclictest1319609-21cups-browsed00:04:012
1142767994938,7cyclictest3374176-21cups-browsed22:55:411
1142767994838,4cyclictest0-21swapper/122:05:311
1142767994816,25cyclictest421-21dbus-daemon21:30:291
1142768994726,19cyclictest1352560-21sh00:40:012
1142766994729,11cyclictest12350irq/32-eth023:15:250
114276699472,37cyclictest1271305-21ssh23:00:270
114276699472,37cyclictest1271305-21ssh23:00:270
1142766994710,22cyclictest1317874-21sh23:56:480
1142768994624,19cyclictest1160746-21cut20:10:012
1142767994640,3cyclictest0-21swapper/100:40:011
114276699461,41cyclictest1325071-21ps00:05:350
114276799458,29cyclictest1304453-21ssh23:40:351
1142767994536,5cyclictest0-21swapper/123:05:001
1142767994536,5cyclictest0-21swapper/123:05:001
1142766994530,12cyclictest1233664-21sh22:15:240
1142766994523,19cyclictest1211855-21sh21:50:000
1142768994436,5cyclictest1257733-21systemd-run22:45:012
1142768994436,3cyclictest0-21swapper/200:00:012
1142768994419,22cyclictest659-21snmpd22:10:392
1142767994437,4cyclictest0-21swapper/122:30:011
114276799442,31cyclictest1263119-21ssh22:50:321
1142766994420,21cyclictest1241750-21sshd22:25:210
1142767994335,5cyclictest0-21swapper/121:20:211
114276899429,19cyclictest1178734-21diskmemload21:16:222
1142768994232,7cyclictest1225670-21proc_pri22:05:342
114276799425,21cyclictest1051-21mta-sts-daemon21:00:261
1142767994233,6cyclictest1161272-21fschecks_time20:10:221
1142767994233,6cyclictest1161272-21fschecks_time20:10:221
114276699424,32cyclictest1204716-21sh21:40:290
114276699424,32cyclictest1204716-21sh21:40:290
114276699422,33cyclictest1258848-21ssh22:45:280
1142766994220,19cyclictest0-21swapper/000:40:010
1142768994116,21cyclictest0-21swapper/220:10:302
1142768994116,21cyclictest0-21swapper/220:10:302
1142768994115,21cyclictest0-21swapper/219:15:202
114276899410,12cyclictest1305032-21ssh23:40:482
1142767994132,5cyclictest1283319-21fschecks_count23:15:201
1142767994131,6cyclictest1195306-21latency_hist21:30:021
1142767994114,5cyclictest171rcu_preempt21:45:321
1142766994127,11cyclictest1333185-21sendmail-mta00:15:310
1142766994126,12cyclictest1337853-21unixbench_singl00:20:400
1142766994117,21cyclictest1216710-21fschecks_count21:55:200
1142766994116,21cyclictest0-21swapper/000:30:330
1142766994113,25cyclictest1213351-21switchtime21:50:380
114276899403,16cyclictest171rcu_preempt00:33:272
1142768994031,5cyclictest1340241-21rm00:25:012
1142768994017,19cyclictest0-21swapper/221:50:292
114276899401,14cyclictest1288603-21ssh23:20:452
114276799409,24cyclictest428-21mta-sts-daemon22:40:301
114276799403,4cyclictest1179937-21ssh21:10:311
1142767994032,5cyclictest1332541-21cpu00:15:181
114276699408,30cyclictest1226315-21ssh22:05:580
1142768993931,5cyclictest1178734-21diskmemload21:45:002
1142768993931,5cyclictest1178734-21diskmemload21:45:002
1142768993930,6cyclictest1328980-21ntp_kernel_pll_00:10:282
1142768993917,19cyclictest0-21swapper/222:50:292
114276899390,12cyclictest1333122-21ntpq00:15:292
114276799393,28cyclictest1250422-21ssh22:35:251
1142767993930,4cyclictest0-21swapper/123:45:411
1142767993929,6cyclictest1220190-21sendmail22:00:001
1142767993929,5cyclictest0-21swapper/122:20:251
1142767993929,5cyclictest0-21swapper/122:20:251
1142766993915,22cyclictest1169772-21kworker/u8:6-xprtiod21:25:250
1142768993831,3cyclictest0-21swapper/223:30:272
1142768993831,3cyclictest0-21swapper/223:15:012
1142768993820,15cyclictest0-21swapper/222:25:012
1142768993820,15cyclictest0-21swapper/222:25:012
1142768993817,18cyclictest0-21swapper/223:15:282
114276899381,12cyclictest1271461-21ntpq23:00:332
114276899381,12cyclictest1271461-21ntpq23:00:332
1142767993828,6cyclictest3374176-21cups-browsed21:52:321
1142767993827,5cyclictest0-21swapper/123:55:361
114276699388,17cyclictest1308358-21ssh23:45:280
114276699387,26cyclictest1275629-21ssh23:05:320
114276699385,31cyclictest1252559-21ssh22:38:160
114276699382,8cyclictest1199365-21munin-plugin-st21:35:010
114276699382,30cyclictest1169174-21ntpq20:35:290
1142766993818,17cyclictest0-21swapper/023:20:230
1142766993817,18cyclictest0-21swapper/020:50:380
1142766993813,22cyclictest0-21swapper/022:30:370
114276899373,30cyclictest1312512-21ntpq23:50:282
114276899373,28cyclictest1291945-21ntpq23:25:262
1142768993731,4cyclictest0-21swapper/221:40:012
1142768993731,4cyclictest0-21swapper/221:40:012
1142768993730,4cyclictest1196881-21ssh21:30:392
1142768993728,6cyclictest516-21in:imuxsock22:46:212
1142768993728,6cyclictest421-21dbus-daemon19:35:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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