Hi,
You do not need system-wide mode here.
Your program is counting not sampling.
The reason it does not work when you program 2 events is because you have
a bug in your program. See below.
On Wed, Oct 28, 2009 at 8:16 PM, Ata E Husain <aehus...@buffalo.edu> wrote:
>
> for(i=0;i < outp.pfp_pmc_count; i++) {
> pc[i].reg_num = outp.pfp_pmcs[i].reg_num;
> pc[i].reg_value = outp.pfp_pmcs[i].reg_value;
> }
>
> for(i=0; i < outp.pfp_pmd_count; i++) {
> pd[i].reg_num = outp.pfp_pmds[i].reg_num;
> pd[i].reg_value = 0;
> }
>
> ctx.ctx_flags |= PFM_FL_SYSTEM_WIDE;
Drop this.
> fd = pfm_create_context(&ctx, NULL, 0, 0);
>
> if(fd == -1) {
> perror("\nCan't create pfm context\n");
> exit(1);
> }
>
> if(pfm_write_pmcs(fd, pc, outp.pfp_pmc_count) == -1){
> perror("\nCan't perform write to pmcs\n");
> exit(1);
> }
>
> if(pfm_write_pmds(fd, pd, 1) == -1) {
Must be out.pfp_pmd_count not 1. Otherwise you are programming only one counter.
> if(pfm_read_pmds(fd, pd, inp.pfp_event_count) == -1){
Yes, or could also use outp.pfp_pmd_count.
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