• Andi Kleen's avatar
    perf/x86: Fix data source decoding for Skylake · 6ae5fa61
    Andi Kleen authored
    Skylake changed the encoding of the PEBS data source field.
    Some combinations are not available anymore, but some new cases
    e.g. for L4 cache hit are added.
    Fix up the conversion table for Skylake, similar as had been done
    for Nehalem.
    On Skylake server the encoding for L4 actually means persistent
    memory. Handle this case too.
    To properly describe it in the abstracted perf format I had to add
    some new fields. Since a hit can have only one level add a new
    field that is an enumeration, not a bit field to describe
    the level. It can describe any level. Some numbers are also
    used to describe PMEM and LFB.
    Also add a new generic remote flag that can be combined with
    the generic level to signify a remote cache.
    And there is an extension field for the snoop indication to handle
    the Forward state.
    I didn't add a generic flag for hops because it's not needed
    for Skylake.
    I changed the existing encodings for older CPUs to also fill in the
    new level and remote fields.
    Signed-off-by: default avatarAndi Kleen <ak@linux.intel.com>
    Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
    Cc: Michael Ellerman <mpe@ellerman.id.au>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: acme@kernel.org
    Cc: jolsa@kernel.org
    Link: http://lkml.kernel.org/r/20170816222156.19953-3-andi@firstfloor.orgSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
core.c 121 KB