Re: Incorrect opreport message ?

[Saikiran M. <hum...@gm...>]

Andi Kleen wrote:
> Saikiran Madugula <hum...@gm...> writes:
> 
>> I was using oprofile (0.9.3) to monitor two events CPU_CLK_UNHALTED
>> and LLC_MISSES. According to ophelp on the machine LLC_MISSES
>> monitors the number of L2 cache misses. Opreport prints the results
>> as L2_RQSTS. Is it error in printing the correct event by opreport ?
>> Here are the relevant commands. I have checked the logfiles and
>> current dump and I see LLC_MISSES everywhere.
> 
> LLC_MISSES is an alias for L2_RQSTS. The first is the architectural
> perfmon name and the later the micro architectural name.
> When decoding oprofile doesn't know which alias you used originally.
> 
> -Andi
> 
Thanks Andi, so LLC_MISSES is basically L2_RQSTS but with a unit mask of 0x41 which seems to be consistent with what ophelp and opreport say. Is there a particular reason for LLC_MISSES to be a separate field rather than as a unit mask field of L2_RQSTS ?