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2025-08-29 - 12:04

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #5

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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  Phytec
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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.

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 rackbslot5s.osadl.org (updated Fri Aug 29, 2025 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2397348995848,5cyclictest2449297-21idleruntime-cro21:40:013
2397342994935,11cyclictest311ktimers/222:00:122
2397348994838,6cyclictest2503387-21grep00:10:263
2397336994737,6cyclictest2475923-21munin-plugin-st22:55:000
2397337994619,10cyclictest2509744-21/usr/sbin/munin00:30:181
2397348994537,5cyclictest2495107-21grep23:50:003
2397348994537,5cyclictest2495107-21grep23:50:003
2397337994517,12cyclictest2399823-21/usr/sbin/munin19:15:151
2397337994517,12cyclictest2399823-21/usr/sbin/munin19:15:141
2397348994433,8cyclictest2484436-21apt23:20:003
2397337994417,9cyclictest0-21swapper/122:14:591
2397337994329,9cyclictest2398201-21/usr/sbin/munin19:10:271
2397337994328,10cyclictest2511549-21/usr/sbin/munin00:35:221
2397336994332,7cyclictest2447077-21grep21:30:270
2397337994228,11cyclictest2507983-21/usr/sbin/munin00:25:181
2397337994228,11cyclictest2422354-21/usr/sbin/munin20:20:161
2397337994227,10cyclictest2481385-21/usr/sbin/munin23:10:161
2397337994131,7cyclictest2453460-21diskstats21:50:221
2397337994130,7cyclictest2429558-21/usr/sbin/munin20:40:221
2397337994128,10cyclictest2405473-21/usr/sbin/munin19:30:211
2397348994031,6cyclictest2456916-21cut22:00:173
2397348994030,6cyclictest2404284-21grep19:25:263
2397337994033,3cyclictest2500460-21apt-get00:05:151
2397337994032,4cyclictest2415398-21apt-get20:00:141
2397337994032,4cyclictest2415398-21apt-get20:00:141
2397337994028,8cyclictest2491721-21apt-get23:40:121
2397337994025,10cyclictest2456875-21/usr/sbin/munin22:00:161
2397337994023,13cyclictest2466477-21grep22:25:251
2397337994023,13cyclictest2466477-21grep22:25:251
2397337994023,12cyclictest2464494-21/usr/sbin/munin22:20:301
2397337994018,18cyclictest2441153-21tune2fs21:15:201
2397348993932,5cyclictest2457830-21kworker/u8:2+events_unbound22:23:103
2397342993931,4cyclictest0-21swapper/221:45:002
2397337993932,3cyclictest2401543-21apt-get19:20:151
2397337993928,7cyclictest2497583-21/usr/sbin/munin23:55:201
2397337993927,7cyclictest2448235-21/usr/sbin/munin21:35:221
2397337993926,10cyclictest2471420-21/usr/sbin/munin22:40:231
2397337993926,10cyclictest2455705-21/usr/sbin/munin21:55:251
2397337993926,10cyclictest2414352-21/usr/sbin/munin19:55:251
2397337993925,11cyclictest2479069-21cron23:02:001
2397337993920,14cyclictest2434678-21ntp_kernel_pll_20:55:201
2397348993828,7cyclictest2407919-21head19:35:273
2397337993832,3cyclictest2484690-21apt-get23:20:141
2397337993832,3cyclictest2467200-21apt-get22:30:181
2397337993832,3cyclictest2467200-21apt-get22:30:181
2397337993831,3cyclictest2462072-21apt-get22:15:161
2397337993831,3cyclictest2425622-21apt-get20:30:151
2397337993829,4cyclictest0-21swapper/123:30:171
2397337993828,7cyclictest2490841-21/usr/sbin/munin23:35:241
2397337993827,8cyclictest2433110-21/usr/sbin/munin20:50:251
2397337993827,8cyclictest2409012-21/usr/sbin/munin19:40:201
2397337993827,8cyclictest2403350-21/usr/sbin/munin19:25:151
2397337993827,7cyclictest2483404-21/usr/sbin/munin23:15:191
2397337993827,7cyclictest2469216-21df22:35:161
2397337993825,10cyclictest2459707-21sshd22:07:331
2397337993821,13cyclictest2480610-21head23:05:271
2397336993830,4cyclictest0-21swapper/021:20:000
2397336993829,5cyclictest0-21swapper/021:00:000
2397342993730,4cyclictest2406422-21munin-plugin-st19:35:012
2397342993729,4cyclictest0-21swapper/200:20:002
2397342993728,4cyclictest0-21swapper/221:20:002
2397342993726,8cyclictest311ktimers/219:15:132
2397342993726,8cyclictest311ktimers/219:15:132
2397337993731,3cyclictest2486391-21apt-get23:25:141
2397337993730,4cyclictest2502366-21apt-get00:10:121
2397337993727,7cyclictest2472806-21/usr/sbin/munin22:45:161
2397337993727,7cyclictest2435870-21/usr/sbin/munin21:00:161
2397337993727,7cyclictest2420495-21/usr/sbin/munin20:15:271
2397337993726,8cyclictest2410403-21/usr/sbin/munin19:45:171
2397337993726,7cyclictest2419360-21/usr/sbin/munin20:10:231
2397337993725,9cyclictest2438541-21/usr/sbin/munin21:05:281
2397337993723,10cyclictest2504182-21df_inode00:15:151
2397337993720,13cyclictest2444928-21ntp_kernel_pll_21:25:221
2397337993720,12cyclictest2431289-21tr20:45:221
2397337993719,14cyclictest2451423-21gpg-connect-age21:45:001
2397336993729,4cyclictest0-21swapper/020:00:180
2397336993729,4cyclictest0-21swapper/020:00:180
2397348993626,7cyclictest2472665-21fschecks_count22:45:153
2397348993625,7cyclictest0-21swapper/320:40:203
2397348993625,7cyclictest0-21swapper/320:40:003
2397342993627,5cyclictest0-21swapper/200:25:002
2397337993627,6cyclictest2494192-21/usr/sbin/munin23:45:221
2397337993627,6cyclictest2494192-21/usr/sbin/munin23:45:221
2397337993626,7cyclictest2499105-21/usr/sbin/munin00:00:171
2397337993626,7cyclictest2495596-21/usr/sbin/munin23:50:181
2397337993626,7cyclictest2451743-21df21:45:181
2397337993625,8cyclictest2443289-21/usr/sbin/munin21:20:271
2397337993625,7cyclictest2417211-21/usr/sbin/munin20:05:171
2397337993624,9cyclictest2507135-21sshd00:23:381
2397337993624,9cyclictest2424445-21/usr/sbin/munin20:25:231
2397337993622,11cyclictest2446338-21/usr/sbin/munin21:30:181
2397336993628,4cyclictest2505547-21sendmail00:20:000
2397336993628,4cyclictest0-21swapper/023:45:000
2397336993627,6cyclictest2466480-21unixbench_multi22:25:250
2397336993627,6cyclictest2466480-21unixbench_multi22:25:250
2397348993528,4cyclictest2439040-21sh21:10:003
2397348993528,4cyclictest0-21swapper/323:40:003
2397342993528,4cyclictest2501930-21latency_hist00:10:012
2397342993528,4cyclictest0-21swapper/223:45:002
2397342993525,6cyclictest2458675-21fschecks_time22:05:202
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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