diff options
| -rw-r--r-- | src/bench/bench.cpp | 6 | ||||
| -rw-r--r-- | src/bench/bench.h | 3 |
2 files changed, 3 insertions, 6 deletions
diff --git a/src/bench/bench.cpp b/src/bench/bench.cpp index 849d924af2..7b307d6f42 100644 --- a/src/bench/bench.cpp +++ b/src/bench/bench.cpp @@ -55,13 +55,13 @@ bool benchmark::State::KeepRunning() else { now = gettimedouble(); double elapsed = now - lastTime; - double elapsedOne = elapsed * countMaskInv; + double elapsedOne = elapsed / (countMask + 1); if (elapsedOne < minTime) minTime = elapsedOne; if (elapsedOne > maxTime) maxTime = elapsedOne; // We only use relative values, so don't have to handle 64-bit wrap-around specially nowCycles = perf_cpucycles(); - uint64_t elapsedOneCycles = (nowCycles - lastCycles) * countMaskInv; + uint64_t elapsedOneCycles = (nowCycles - lastCycles) / (countMask + 1); if (elapsedOneCycles < minCycles) minCycles = elapsedOneCycles; if (elapsedOneCycles > maxCycles) maxCycles = elapsedOneCycles; @@ -69,7 +69,6 @@ bool benchmark::State::KeepRunning() // If the execution was much too fast (1/128th of maxElapsed), increase the count mask by 8x and restart timing. // The restart avoids including the overhead of this code in the measurement. countMask = ((countMask<<3)|7) & ((1LL<<60)-1); - countMaskInv = 1./(countMask+1); count = 0; minTime = std::numeric_limits<double>::max(); maxTime = std::numeric_limits<double>::min(); @@ -81,7 +80,6 @@ bool benchmark::State::KeepRunning() uint64_t newCountMask = ((countMask<<1)|1) & ((1LL<<60)-1); if ((count & newCountMask)==0) { countMask = newCountMask; - countMaskInv = 1./(countMask+1); } } } diff --git a/src/bench/bench.h b/src/bench/bench.h index 1f36f2a4bc..79109eaa56 100644 --- a/src/bench/bench.h +++ b/src/bench/bench.h @@ -41,7 +41,7 @@ namespace benchmark { std::string name; double maxElapsed; double beginTime; - double lastTime, minTime, maxTime, countMaskInv; + double lastTime, minTime, maxTime; uint64_t count; uint64_t countMask; uint64_t beginCycles; @@ -55,7 +55,6 @@ namespace benchmark { minCycles = std::numeric_limits<uint64_t>::max(); maxCycles = std::numeric_limits<uint64_t>::min(); countMask = 1; - countMaskInv = 1./(countMask + 1); } bool KeepRunning(); }; |