/
perfcounters.h
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/
perfcounters.h
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/*
* Copyright 2009, Pythia authors (see AUTHORS file).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef __sparc__
#include <libcpc.h>
#endif
class PerfCounters {
public:
void init();
void threadinit();
void destroy();
inline void writeCounters(unsigned long long* counter1, unsigned long long* counter2)
{
#ifdef PERFCOUNT
#if defined(__i386__) || defined(__x86_64__)
*counter1 = readpmc(0);
*counter2 = readpmc(1);
#elif defined(__sparc__)
unsigned long long val;
__asm__ __volatile__ (
"rd %%pic, %0"
: "=r" (val) /* output */
);
*counter1 = val >> 32;
*counter2 = val & 0xFFFFFFFFull;
#else
#error Performance counters not known for this architecture.
#endif
#endif
}
private:
#if defined(__i386__) || defined(__x86_64__)
inline unsigned long long readpmc(unsigned int counterid) {
unsigned long hi, lo;
__asm__ __volatile__ ("rdpmc" \
: "=d" (hi), "=a" (lo) \
: "c" (counterid) \
);
return (((unsigned long long) hi) << 32) | lo;
}
#elif defined(__sparc__)
cpc_t* cpc;
#endif
};