Re: [perfmon2] Error message: event invalid or missing unit mask

[stephane e. <er...@go...>]

On Tue, Jul 14, 2009 at 6:02 PM, Tanima Dey<dey...@ya...> wrote:
> Hi,
>
> I am using perfmon on Intel Core 2 Quad CPU Q6600 and trying to read event
> counters for L2 cache, such as, L2_LINES_IN, L2_IFETCH etc. I found the
> names of the events using pfm_get_event_name() function. But when I specify
> "L2_ST" in the pfm_find_full_event() to initiate the counters, it shows the
> error message:
>  "event invalid or missing unit mask".
>
> How can I find the unit mask for an event? I have used the function
> pfm_find_event_mask(), but it is still showing the error message "event
> invalid".
>
You ca use pfm_get_num_event_masks(). If it's zero, then no unit masks
are necessary.

> Although the pfm_get_event_name() function tells that L2 caches events are
> supported, are there any reasons why it is showing the error message?
>
Yes, you need to specify at least one unit masks when the events has some.