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Waivers and Implementation-Dependent Functionality E–13
Enable performance monitoring; start the counters from zero
DIGITAL UNIX
Input: a0 = 7 Function code value
a1 = arg Argument from Table E–5
Output: v0 = 1 Success
v0 = 0 Failure (not generated)
OpenVMS Alpha
Input: R16 = 7 Function code value
R17 = arg Argument from Table E–5
Output: R0 = 1 Success
R0 = 0 Failure (not generated)
Disable performance monitoring; do not reset counters
DIGITAL UNIX
Input: a0 = 0 Function code value
a1 = arg Argument from Table E–6
Output: v0 = 1 Success
v0 = 0 Failure (not generated)
OpenVMS Alpha
Input: R16 = 0 Function code value
R17 = arg Argument from Table E–6
Output: R0 = 1 Success
R0 = 0 Failure (not generated)
Select desired events (MUX_SELECT)
DIGITAL UNIX
Input: a0 = 2 Function code value
a1 = arg Argument from Table E–7 or E–8
Output: v0 = 1 Success
v0 = 0 Failure (not generated)
OpenVMS Alpha
Input: R16 = 2 Function code value
R17 = arg Argument from Table E–7 or E–8
Output: R0 = 1 Success
R0 = 0 Failure (not generated)
Table E–4: OpenVMS Alpha and DIGITAL UNIX Performance Monitoring
Functions (Continued)
Function Register Usage Comments