diff options
Diffstat (limited to 'programs/benchmark-iostreams/main.cpp')
| -rw-r--r-- | programs/benchmark-iostreams/main.cpp | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/programs/benchmark-iostreams/main.cpp b/programs/benchmark-iostreams/main.cpp index 58012955..8c680a14 100644 --- a/programs/benchmark-iostreams/main.cpp +++ b/programs/benchmark-iostreams/main.cpp @@ -22,7 +22,8 @@ Distributed under the Boost Software License, Version 1.0. http://www.boost.org/LICENSE_1_0.txt) */ -#define MAXBLOCKSIZE (256 * 1024) +#define MINBLOCKSIZE (4096) +#define MAXBLOCKSIZE (4096) #define REGIONSIZE (100 * 1024 * 1024) #include "../../include/afio/afio.hpp" @@ -102,9 +103,9 @@ template <class F> inline void run_test(const char *csv, off_t max_extent, F &&f char buffer[MAXBLOCKSIZE]; std::vector<std::pair<unsigned, unsigned>> offsets(512 * 1024); std::vector<std::vector<unsigned>> results; - for(size_t blocksize = 1; blocksize <= MAXBLOCKSIZE; blocksize <<= 1) + for(size_t blocksize = MINBLOCKSIZE; blocksize <= MAXBLOCKSIZE; blocksize <<= 1) { - size_t scale = blocksize / 16; + size_t scale = (512 * 1024) / (REGIONSIZE / blocksize) / 10; // On average tap each block ten times if(scale < 1) scale = 1; small_prng rand; @@ -127,7 +128,7 @@ template <class F> inline void run_test(const char *csv, off_t max_extent, F &&f } } std::ofstream out(csv); - for(size_t blocksize = 1; blocksize <= MAXBLOCKSIZE; blocksize <<= 1) + for(size_t blocksize = MINBLOCKSIZE; blocksize <= MAXBLOCKSIZE; blocksize <<= 1) { out << "," << blocksize; } @@ -135,7 +136,7 @@ template <class F> inline void run_test(const char *csv, off_t max_extent, F &&f for(size_t n = 0; n < offsets.size(); n++) { auto it = results.cbegin(); - for(size_t blocksize = 1; blocksize <= MAXBLOCKSIZE; blocksize <<= 1, ++it) + for(size_t blocksize = MINBLOCKSIZE; blocksize <= MAXBLOCKSIZE; blocksize <<= 1, ++it) { if(n < it->size()) out << "," << it->at(n); |