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2026-07-01 - 23:08

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 Wed Jul 01, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1167550995529,23cyclictest1234225-21systemd10:00:020
1167550995119,30cyclictest0-21swapper/009:00:010
116755299502,10cyclictest171rcu_preempt10:15:382
1167551995042,5cyclictest1178066-21systemd-run07:45:011
1167551994940,6cyclictest1328838-21cron12:35:011
116755099491,16cyclictest1186379-21ntpq08:10:330
1167552994834,10cyclictest1276930-21sh11:10:012
1167550994728,15cyclictest0-21swapper/009:35:360
116755299461,35cyclictest1247587-21ssh10:20:412
1167550994615,27cyclictest1310910-21/usr/sbin/munin12:05:230
1167550994615,27cyclictest1310910-21/usr/sbin/munin12:05:230
116755099460,23cyclictest1262709-21ssh10:45:350
1167552994538,4cyclictest0-21swapper/211:30:222
1167552994537,5cyclictest421-21dbus-daemon08:35:012
1167551994537,5cyclictest1319734-21systemd-run12:20:011
1167551994533,5cyclictest1179522-21kworker/u8:2-events_unbound09:25:361
1167551994533,5cyclictest1179522-21kworker/u8:2-events_unbound09:25:361
116755199452,34cyclictest1244336-21ssh10:15:331
1167550994516,26cyclictest0-21swapper/012:40:010
116755299447,6cyclictest171rcu_preempt12:35:412
1167550994421,19cyclictest0-21swapper/009:25:360
1167550994421,19cyclictest0-21swapper/009:25:360
1167552994333,7cyclictest1302993-21grep11:50:452
1167551994335,5cyclictest1252571-21latency_hist10:30:021
116755199431,35cyclictest1308512-21sh12:00:311
1167550994316,4cyclictest1293734-21unixbench-2d11:35:450
1167552994234,5cyclictest1203531-21diskmemload12:30:472
1167552994234,5cyclictest1170889-21aten_r2power_fr07:20:242
1167552994228,10cyclictest1188537-21munin-plugin-st08:20:012
1167551994236,3cyclictest0-21swapper/111:30:251
116755099429,16cyclictest0-21swapper/011:10:240
1167550994233,6cyclictest1270781-21munin-run11:00:010
1167550994219,2cyclictest0-21swapper/010:25:020
1167550994219,20cyclictest1284905-21sshd11:21:220
116755299414,30cyclictest1210721-21sh09:20:332
116755299414,30cyclictest1210721-21sh09:20:332
1167552994133,4cyclictest0-21swapper/209:50:022
116755099412,15cyclictest1302515-21ntp_states11:50:380
116755099412,15cyclictest1204685-21ntpq09:10:380
1167550994120,4cyclictest1241522-21ssh10:10:440
1167550994120,3cyclictest0-21swapper/011:05:460
1167550994116,5cyclictest0-21swapper/011:05:020
1167550994115,5cyclictest371393-21cups-browsed07:17:470
1167552994028,8cyclictest1229040-21needreboot09:50:322
116755299402,28cyclictest371393-21cups-browsed12:05:382
116755299402,28cyclictest371393-21cups-browsed12:05:382
1167551994032,5cyclictest1209663-21ssh09:20:001
1167551994032,5cyclictest1209663-21ssh09:20:001
1167551994025,3cyclictest171rcu_preempt10:55:451
116755099403,7cyclictest1317692-21ntpq12:15:380
1167550994029,7cyclictest420-21avahi-daemon10:16:060
116755099402,15cyclictest1173017-21ntp_states07:25:410
1167550994020,17cyclictest0-21swapper/008:45:380
1167550994020,17cyclictest0-21swapper/008:45:380
1167552993933,2cyclictest0-21swapper/208:00:012
1167552993932,4cyclictest1167549-21cyclictest07:35:352
1167552993931,5cyclictest1319724-21sendmail12:20:012
1167552993931,5cyclictest1270786-21idleruntime-cro11:00:012
1167552993929,7cyclictest1194540-21basename08:40:012
1167551993932,4cyclictest0-21swapper/110:00:011
1167550993930,5cyclictest1250680-21proc_pri10:25:420
1167552993830,5cyclictest1225058-21systemd-run09:45:012
1167552993824,10cyclictest1209662-21latency_hist09:20:022
1167552993824,10cyclictest1209662-21latency_hist09:20:022
1167551993832,3cyclictest0-21swapper/108:00:011
1167551993830,5cyclictest1193037-21munin-plugin-st08:35:011
1167551993829,7cyclictest1307479-21ssh12:00:011
1167551993825,5cyclictest750-21ntpd11:20:321
116755099386,10cyclictest12650irq/32-eth009:50:350
1167550993817,15cyclictest12650irq/32-eth011:55:350
116755099381,18cyclictest1238338-21ntpq10:05:380
1167552993729,5cyclictest1324338-21sed12:25:482
1167552993726,7cyclictest420-21avahi-daemon10:39:572
1167552993726,7cyclictest420-21avahi-daemon10:39:572
116755299371,31cyclictest1238491-21ssh10:05:442
1167551993728,6cyclictest420-21avahi-daemon10:11:421
1167551993728,5cyclictest1274200-21/usr/sbin/munin11:05:291
1167551993724,9cyclictest371393-21cups-browsed11:38:071
1167550993731,4cyclictest1296376-21ssh11:40:380
1167550993712,6cyclictest12650irq/32-eth012:10:370
1167552993627,6cyclictest1203534-21grep09:10:012
116755299361,27cyclictest1216959-21ssh09:30:512
1167551993628,5cyclictest0-21swapper/112:30:021
1167551993624,6cyclictest0-21swapper/109:45:361
116755099362,17cyclictest1207628-21rm09:15:340
116755099362,17cyclictest1207628-21rm09:15:340
116755299353,25cyclictest1320779-21rm12:20:362
1167552993527,5cyclictest1308144-21fschecks_count12:00:252
1167552993525,7cyclictest1186056-21sort08:10:282
1167552993525,6cyclictest420-21avahi-daemon11:12:162
1167552993525,6cyclictest1-21systemd10:00:012
1167552993524,5cyclictest0-21swapper/208:45:362
1167552993524,5cyclictest0-21swapper/208:45:362
1167551993528,3cyclictest0-21swapper/111:15:021
1167551993527,5cyclictest1255591-21latency_hist10:35:021
1167551993527,5cyclictest1203549-21sh09:10:021
1167550993528,4cyclictest1199048-21systemd-run08:55:010
1167550993528,3cyclictest0-21swapper/011:15:370
116755099352,16cyclictest1320824-21ntpq12:20:380
1167550993512,9cyclictest12650irq/32-eth007:20:320
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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