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authorAndi Kleen <ak@linux.intel.com>2008-08-18 14:50:31 +0200
committerRobert Richter <robert.richter@amd.com>2008-10-13 19:25:09 +0200
commitb99170288421c79f0c2efa8b33e26e65f4bb7fb8 (patch)
tree7580ce405a4dbbd2c57fbc9a129102481467e281 /fs/inode.c
parentf645f6406463a01869c50844befc76d528971690 (diff)
oprofile: Implement Intel architectural perfmon support
Newer Intel CPUs (Core1+) have support for architectural events described in CPUID 0xA. See the IA32 SDM Vol3b.18 for details. The advantage of this is that it can be done without knowing about the specific CPU, because the CPU describes by itself what performance events are supported. This is only a fallback because only a limited set of 6 events are supported. This allows to do profiling on Nehalem and on Atom systems (later not tested) This patch implements support for that in oprofile's Intel Family 6 profiling module. It also has the advantage of supporting an arbitary number of events now as reported by the CPU. Also allow arbitary counter widths >32bit while we're at it. Requires a patched oprofile userland to support the new architecture. v2: update for latest oprofile tree remove force_arch_perfmon Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
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