Hi all,
I've been fighting this error and I can't make anything of it.
Basically this is what I have:
[CODE]
pfm_perf_encode_arg_t arg;
char **fstr;
struct perf_event_attr attr;
memset(&arg, 0, sizeof(arg));
arg.size = sizeof(pfm_perf_encode_arg_t);
arg.attr = &attr;
arg.fstr = &fstr;
//This Succeeds
ret = pfm_get_os_event_encoding("INST_RETIRED", PFM_PLM3,
PFM_OS_PERF_EVENT_EXT, &arg);
fd = perf_event_open(&arg.attr, pid, -1, -1, 0);
if (fd<0)
err(1, "\nERROR: perf_event_open failed: %s",
pfm_strerror(fd));
[\CODE]
Now the problem is, fd is always -1 and it says:
"ERROR: perf_event_open failed: not supported: Argument list
too long"
I don't get how this comes to be.
Here's what my fstr contains:
fstr =
ivb::INST_RETIRED:ANY_P:e=0:i=0:c=0:t=0:u=1:k=0:period=13831647021102465012:freq=13831647021102465012:precise=3:mg=0:mh=1
Any help will be highly appreciated.
Many thanks for your time.
Faheem
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