You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2025-10-28 - 13:53

OSADL QA Farm on Real-time of Mainline Linux

About - Hardware - CPUs - Benchmarks - Graphics - Benchmarks - Kernels - Boards/Distros - Latency monitoring - Latency plots - System data - Profiles - Compare - Awards

Default latency plot of shadow in rack #b, 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 
Special  All - All RT - Optimization - Ethernet - Thumbnails - Next
  
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.

Note that this system runs a non-RT kernel.
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 20 highest latencies:
System rackbslot7s.osadl.org (updated Tue Oct 28, 2025 00:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3759283015,796sleep23804-21/usr/sbin/munin19:35:322
1303727557,712sleep013081-21ntpq23:30:350
1303727557,712sleep013081-21ntpq23:30:350
10159268613,658sleep110162-21sshd21:38:251
4987251010,460sleep05054-21fschecks_time19:40:270
4987251010,460sleep05054-21fschecks_time19:40:270
3750247512,403sleep03901-21unixbench_multi23:00:380
2836123957,350sleep028442-21fschecks_time00:20:300
2836123957,350sleep028442-21fschecks_time00:20:300
25871238910,365sleep225920-21unin-run22:30:072
2773723536,36sleep00-21swapper/022:35:220
29669229024,254sleep029710-21ntpq22:40:350
944922538,204sleep0362-21snmpd21:35:330
7071224644,150sleep06429-21/usr/sbin/munin19:45:400
32071224259,93sleep00-21swapper/000:30:400
30186223743,156sleep030272-21timerandwakeup19:15:390
32288223433,147sleep032336-21fschecks_time21:05:570
26459222049,86sleep00-21swapper/000:15:090
18872221739,84sleep00-21swapper/020:25:060
18872221739,84sleep00-21swapper/020:25:060
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional