Hi Stephane, Why couldn't find event transparently decode event masks?
phil On Tue, 2006-08-22 at 03:28 -0700, Stephane Eranian wrote: > hello, > > As we expose unit masks directly to pplications using the libpfm, > some interfaces must be extended and/or added to make it easier > to managed unit masks. > > For instance, in the latest release we have issues on Pentium 4 > for the following function: > - pfm_get_cycle_event(): the default cycle event on P4 has a unit > mask defined, yet the function does not return it. > > It is not too difficult to see that the other functions might have a > problems too, such as : > - pfm_get_retired_event() > > Similarly, it would be nice to have function that knows directly how to > deal with event+unit mask all at once: > - pfm_find_event() > - pfm_get_event_name() > > Let's take the example of pfm_find_event() which takes a string and > returns in a parameter, the event descriptor. It would be nice to have > another function (to maintain some backward compatiblity) that can take > an event string of the form "event_name:unit_mask1:unit_mask2" and return > both the event descriptor and the list of unit mask descriptors. The > function prototype could look as follows: > int pfm_find_event_and_masks(char *str, pfmlib_event_t *e); > > We could do the same thing for pfm_get_event_name(): > int pfm_get_event_and_masks_name(pfmlib_event_t *e, char *str, size_t > maxlen); > > As for get_cycle_event and get_inst_retired_event, they could be modified > similarly: > - int pfm_get_cycle_event(pfmlib_event_t *e); > - int pfm_get_inst_retired_event(pfmlib_event_t *e); > > Any opinion? > Anybody interested? > > PS: some of the libpfm examples would need to be updated accordingly. > _______________________________________________ perfmon mailing list [email protected] http://www.hpl.hp.com/hosted/linux/mail-archives/perfmon/
