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Use 64-bit integers inside Stopwatch to enable longer timings.
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parent
0114c61cf1
commit
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5 changed files with 155 additions and 25 deletions
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@ -5,30 +5,33 @@
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#ifdef __cplusplus
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struct Stopwatch {
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union SplitQword {
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struct {
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uint32_t lsw;
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uint32_t msw;
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};
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uint64_t qw { 0 };
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};
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public:
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Stopwatch(const char* name)
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: m_name(name)
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{
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read_tsc(&m_start_lsw, &m_start_msw);
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read_tsc(&m_start.lsw, &m_start.msw);
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}
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~Stopwatch()
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{
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unsigned end_lsw;
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unsigned end_msw;
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read_tsc(&end_lsw, &end_msw);
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if (m_start_msw != end_msw) {
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dbgprintf("Stopwatch: differing msw, no result for %s\n", m_name);
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}
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unsigned diff = end_lsw - m_start_lsw;
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dbgprintf("Stopwatch(%s): %u ticks\n", m_name, diff);
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SplitQword end;
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read_tsc(&end.lsw, &end.msw);
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uint64_t diff = end.qw - m_start.qw;
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dbgprintf("Stopwatch(%s): %q ticks\n", m_name, diff);
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}
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private:
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const char* m_name { nullptr };
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unsigned m_start_lsw { 0 };
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unsigned m_start_msw { 0 };
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SplitQword m_start;
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};
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#endif // __cplusplus
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