Bug #466 ยป 0001-bug-466-Updated-getticks-to-serialize-execution-of-r.patch
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/**
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* Get the current number of ticks from the CPU.
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*
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* \todo We'll have to deal with removig ticks from the extra cpuids inbetween
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* 2 calls.
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*/
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uint64_t UtilCpuGetTicks(void)
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{
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uint64_t val;
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#if defined(__GNUC__) && (defined(__x86_64) || defined(__i386))
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#if defined(__GNUC__)
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#if defined(__x86_64) || defined(_X86_64_) || defined(ia_64)
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__asm__ __volatile__ (
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"xorl %%eax,%%eax\n\t"
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"cpuid\n\t"
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::: "%rax", "%rbx", "%rcx", "%rdx");
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#else
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__asm__ __volatile__ (
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"xorl %%eax,%%eax\n\t"
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"cpuid\n\t"
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::: "%eax", "%ebx", "%ecx", "%edx");
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#endif
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uint32_t a, d;
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__asm__ __volatile__ ("rdtsc" : "=a" (a), "=d" (d));
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val = ((uint64_t)a) | (((uint64_t)d) << 32);
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#if defined(__x86_64) || defined(_X86_64_) || defined(ia_64)
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__asm__ __volatile__ (
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"xorl %%eax,%%eax\n\t"
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"cpuid\n\t"
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::: "%rax", "%rbx", "%rcx", "%rdx");
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#else
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__asm__ __volatile__ (
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"xorl %%eax,%%eax\n\t"
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"cpuid\n\t"
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::: "%eax", "%ebx", "%ecx", "%edx");
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#endif
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#else /* #if defined(__GNU__) */
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#warning Using inferior version of UtilCpuGetTicks
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struct timeval now;
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gettimeofday(&now, NULL);
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