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2025-12-20 - 09:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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 - 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 rack5slot3s.osadl.org (updated Sat Dec 20, 2025 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
174112239163,25sleep20-21swapper/219:08:182
174112239163,25sleep20-21swapper/219:08:182
172402238163,23sleep10-21swapper/119:06:031
172402238163,23sleep10-21swapper/119:06:031
174092201163,27sleep00-21swapper/019:08:160
174092201163,27sleep00-21swapper/019:08:160
174122200164,24sleep30-21swapper/319:08:193
174122200164,24sleep30-21swapper/319:08:183
96721820,5sleep01762999cyclictest20:55:210
17639999996,2cyclictest0-21swapper/200:04:052
125982990,7sleep230-21rcuc/221:20:562
297362570,1sleep20-21swapper/200:30:012
17639995753,3cyclictest0-21swapper/222:17:482
300352560,6sleep130037-21unixbench_multi22:00:231
250312480,8sleep341-21ksoftirqd/320:35:273
125502450,1sleep10-21swapper/120:10:121
17639993936,2cyclictest0-21swapper/219:35:292
1764499301,19cyclictest28011-21ntp_kernel_pll_23:10:213
1763499301,9cyclictest0-21swapper/123:30:221
1763499301,14cyclictest0-21swapper/100:22:581
317802290,4sleep230-21rcuc/223:20:152
1764499291,25cyclictest31695-21df23:20:143
1764499281,21cyclictest0-21swapper/323:25:473
1764499271,16cyclictest11587-21acpi22:35:123
1764499271,13cyclictest0-21swapper/322:59:353
1763499271,12cyclictest0-21swapper/122:58:261
1763499271,11cyclictest0-21swapper/121:42:251
1763499270,25cyclictest0-21swapper/100:07:481
297502260,4sleep339-21rcuc/319:35:143
1764499261,16cyclictest801-21snmpd23:01:463
1763999261,6cyclictest0-21swapper/200:39:052
1763999261,4cyclictest0-21swapper/223:59:122
1763499261,13cyclictest0-21swapper/122:50:121
1762999263,16cyclictest87150irq/128-enp1s0-20:40:240
1762999263,15cyclictest11-21rcuc/021:00:170
34622250,1sleep00-21swapper/023:30:120
17644992512,3cyclictest8688-21tail22:25:253
17644992510,9cyclictest0-21swapper/323:57:273
1763499255,18cyclictest0-21swapper/120:25:171
17634992520,2cyclictest87150irq/128-enp1s0-21:10:001
1763499251,6cyclictest86950irq/126-enp1s0-21:55:021
17634992515,3cyclictest801-21snmpd19:23:281
1763499251,17cyclictest0-21swapper/123:15:271
1763499251,11cyclictest0-21swapper/123:49:401
1763499251,10cyclictest22672-21awk20:30:261
1763499250,17cyclictest13059-21latency23:50:171
1762999255,11cyclictest17876-21switchtime00:00:260
1762999253,6cyclictest0-21swapper/021:46:580
1762999251,5cyclictest0-21swapper/023:53:140
17644992411,3cyclictest27509-21ps21:55:223
17644992411,2cyclictest19156-21needreboot22:50:173
1764499241,11cyclictest7181-21users23:35:263
1763499249,3cyclictest25435-21grep23:05:161
1763499248,4cyclictest0-21swapper/121:18:221
1763499242,9cyclictest10430-21cpuspeed_turbos20:05:141
1763499242,10cyclictest751-21rngd19:50:021
1763499241,16cyclictest0-21swapper/120:00:181
1763499241,10cyclictest0-21swapper/122:26:141
1762999241,16cyclictest0-21swapper/023:17:240
1762999241,11cyclictest32105-21awk20:55:010
1762999241,11cyclictest11548-21sed23:45:280
1762999241,11cyclictest0-21swapper/022:39:530
17629992410,3cyclictest986-1kworker/u9:122:06:090
231992230,2sleep230-21rcuc/223:00:172
1764499239,2cyclictest0-21swapper/320:05:263
1764499237,6cyclictest0-21swapper/322:00:113
1764499237,2cyclictest19431-21gltestperf00:05:173
1764499231,20cyclictest0-21swapper/322:45:133
1764499231,20cyclictest0-21swapper/322:20:203
1764499231,20cyclictest0-21swapper/322:10:163
1764499231,18cyclictest0-21swapper/300:00:133
17644992310,2cyclictest0-21swapper/323:30:163
1763999237,5cyclictest18987-21kernelversion22:50:172
1763999231,6cyclictest0-21swapper/200:17:202
1763499237,10cyclictest0-21swapper/100:31:511
1763499231,6cyclictest0-21swapper/123:27:221
1763499231,6cyclictest0-21swapper/122:35:151
17634992314,3cyclictest0-21swapper/119:36:521
1763499231,2cyclictest32723-21perf22:10:021
1763499231,16cyclictest0-21swapper/122:33:071
1763499230,8cyclictest0-21swapper/100:39:261
1762999238,3cyclictest11901-21grep20:05:260
1762999237,10cyclictest0-21swapper/000:20:170
1762999236,7cyclictest5941-21diskstats23:35:140
1762999235,9cyclictest0-21swapper/000:30:160
1762999233,10cyclictest4866-21cat22:20:010
1762999232,9cyclictest11-21rcuc/000:10:200
17629992317,3cyclictest826-21lldpd20:01:410
1762999231,6cyclictest0-21swapper/021:38:040
1762999231,6cyclictest0-21swapper/021:27:110
1762999231,5cyclictest0-21swapper/022:41:080
1762999231,5cyclictest0-21swapper/022:41:080
1762999231,4cyclictest0-21swapper/023:20:130
1762999231,3cyclictest0-21swapper/022:26:420
1762999231,16cyclictest0-21swapper/023:43:170
17629992311,2cyclictest11-21rcuc/023:25:200
1762999231,11cyclictest24906-21awk19:25:010
1762999231,10cyclictest26750-21awk23:10:010
1762999230,14cyclictest17658-21kworker/u8:122:51:390
1762999230,10cyclictest20139-21timerandwakeup00:05:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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