[Info-vax] Some VMS/x86 perf test data from WASD maintainer.

[Volker Halle]

Volker Halle schrieb am Donnerstag, 27. April 2023 um 19:49:13 UTC+2:

Here are the correct commands for the PCS$SDA PC sampling SDA extension - sorry about that ;-(

$ ANA/SYS 
SDA> READ/EXEC ! get better symbolization (routine names) 
SDA> PCS LOAD ! PC sampling SDA Execlet 
SDA> PCS START TRACE 
... 
SDA> PCS STOP TRACE 
SDA> PCS SHOW TRACE/STAT/MODE=KERNEL 
...
SDA> PCS UNLOAD 
SDA> EXIT 
 
SDA> PCS SHOW TRACE/STAT/MODE=KERNEL will show the PC values seen most often during the trace period (sorted by decreasing no. of occurences) and it will symbolize the PC values as routine names or execlet names. This might give you an idea, which kind of kernel mode code is running how often. 

Volker.