problems with L1D_ALL_CACHE_REF and L1D_ALL_REF on Intel Core2

[Sylvain G. <syl...@in...>]

Hi all,

I have a problem trying to monitor the L1 data access of any program.
When I try to monitor L1D_ALL_REF or L1D_ALL_CACHE_REF, I obtain this :

opreport error: No sample file found: try running opcontrol --dump
or specify a session containing sample files

Otherwise, when I monitor other L1 events exactly the same way, such as
L1D_CACHE_ST or L1D_CACHE_LD, I got what it seems to me like normal samples.

# opcontrol --start
# ./my_benchmark
# opcontrol --stop ; opcontrol --dump
# opreport -l ./my_benchmark

CPU: Core 2, speed 2327.55 MHz (estimated)
Counted L1D_CACHE_ST events (L1 cacheable data write operations) with a
unit mask of 0x0f (multiple flags) count 7500
Samples on CPU 0
Samples on CPU 1
Samples on CPU 4
Samples on CPU 5
samples  %        samples  %        samples  %        samples  %
symbol name
43360    32.2271  39346    28.3530  40093    18.9801  32526    29.2524
mod_filter(int, int)
17023    12.6523  14356    10.3450  14785     6.9992  12315    11.0755
mult_filter(int, int)


I thought that L1D_ALL_CACHE_REF (or L1D_ALL_REF) was roughly the same
as the sum of L1D_CACHE_ST and L1D_CACHE_LD.

What I don't understand then is why there isn't any sample with
L1D_ALL_CACHE_REF or L1D_ALL_REF.

Thanks,
Sylvain