On Dec 26, 2016 9:13 PM, "Wei Wang" <ww...@virginia.edu> wrote:
Hello,
This could be a stupid question, but does any one know how to use haswell
ep uncore events? I am trying to access event
"hswep_unc_imc0::UNC_M_CAS_COUNT",
however, libpfm4.8 keeps returning errors.
Yrs, this is because the event requires a umask, e.g., RD. Look at the
event listing for hsw_ep_imc0 using showevtinfo.
When I issue this command to translate the event:
./evt2raw "hswep_unc_imc0::UNC_M_CAS_COUNT"
I got an error says:
evt2raw: Error: hswep_unc_imc0::UNC_M_CAS_COUNT is not a raw hardware event
I am running kernel 4.8 on a Intel i7 5820k cpu, and I can access this
event through "perf stat" with this command:
perf stat -a -e "uncore_imc_0/event=0x04,umask=0x0f/" ls
libpfm4.8's "validate" does says that all unc_imc0 events passed tests.
However, all the uncore event strings listed in validate_x86.c does not
work with evt2raw.
I feel I am not using the correct syntax for haswell uncore events. Does
any one know what is the proper way to use them?
Thank you,
Wei
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