This is a benchmark mentioned in the paper R. Dementiev, L. Kettner, P. Sanders "STXXL: standard template library for XXL data sets" Software: Practice and Experience Volume 38, Issue 6, Pages 589-637, May 2008 DOI: 10.1002/spe.844
/*************************************************************************** * containers/stack_benchmark.cpp * * Part of the STXXL. See http://stxxl.sourceforge.net * * Copyright (C) 2006 Roman Dementiev <[email protected]> * * Distributed under the Boost Software License, Version 1.0. * (See accompanying file LICENSE_1_0.txt or copy at * http://www.boost.org/LICENSE_1_0.txt) **************************************************************************/ #include <stxxl/stack> #define MEM_2_RESERVE (768 * 1024 * 1024) #ifndef BLOCK_SIZE #define BLOCK_SIZE (2 * 1024 * 1024) #endif #ifndef DISKS #define DISKS 4 #endif template <unsigned RECORD_SIZE> struct my_record_ { char data[RECORD_SIZE]; my_record_() { memset(data, 0, sizeof(data)); } }; template <unsigned RECORD_SIZE> inline std::ostream & operator << (std::ostream & o, const my_record_<RECORD_SIZE> &) { o << "."; return o; } template <class my_record> void run_stxxl_growshrink2_stack(stxxl::int64 volume) { typedef typename stxxl::STACK_GENERATOR<my_record, stxxl::external, stxxl::grow_shrink2, DISKS, BLOCK_SIZE>::result stack_type; typedef typename stack_type::block_type block_type; STXXL_MSG("Record size: " << sizeof(my_record) << " bytes"); stxxl::prefetch_pool<block_type> p_pool(DISKS * 4); stxxl::write_pool<block_type> w_pool(DISKS * 4); stack_type Stack(p_pool, w_pool); stxxl::int64 ops = volume / sizeof(my_record); stxxl::int64 i; my_record cur; stxxl::stats * Stats = stxxl::stats::get_instance(); Stats->reset(); stxxl::timer Timer; Timer.start(); for (i = 0; i < ops; ++i) { Stack.push(cur); } Timer.stop(); STXXL_MSG("Records in Stack: " << Stack.size()); if (i != Stack.size()) { STXXL_MSG("Size does not match"); abort(); } STXXL_MSG("Insertions elapsed time: " << (Timer.mseconds() / 1000.) << " seconds : " << (double(volume) / (1024. * 1024. * Timer.mseconds() / 1000.)) << " MB/s"); std::cout << *Stats; Stats->reset(); Stack.set_prefetch_aggr(DISKS * 8); Timer.reset(); Timer.start(); for (i = 0; i < ops; ++i) { Stack.pop(); } Timer.stop(); STXXL_MSG("Records in Stack: " << Stack.size()); if (!Stack.empty()) { STXXL_MSG("Stack must be empty"); abort(); } STXXL_MSG("Deletions elapsed time: " << (Timer.mseconds() / 1000.) << " seconds : " << (double(volume) / (1024. * 1024. * Timer.mseconds() / 1000.)) << " MB/s"); std::cout << *Stats; } template <class my_record> void run_stxxl_normal_stack(stxxl::int64 volume) { typedef typename stxxl::STACK_GENERATOR<my_record, stxxl::external, stxxl::normal, DISKS, BLOCK_SIZE>::result stack_type; typedef typename stack_type::block_type block_type; STXXL_MSG("Record size: " << sizeof(my_record) << " bytes"); stack_type Stack; stxxl::int64 ops = volume / sizeof(my_record); stxxl::int64 i; my_record cur; stxxl::stats * Stats = stxxl::stats::get_instance(); Stats->reset(); stxxl::timer Timer; Timer.start(); for (i = 0; i < ops; ++i) { Stack.push(cur); } Timer.stop(); STXXL_MSG("Records in Stack: " << Stack.size()); if (i != Stack.size()) { STXXL_MSG("Size does not match"); abort(); } STXXL_MSG("Insertions elapsed time: " << (Timer.mseconds() / 1000.) << " seconds : " << (double(volume) / (1024. * 1024. * Timer.mseconds() / 1000.)) << " MB/s"); std::cout << *Stats; Stats->reset(); Timer.reset(); Timer.start(); for (i = 0; i < ops; ++i) { Stack.pop(); } Timer.stop(); STXXL_MSG("Records in Stack: " << Stack.size()); if (!Stack.empty()) { STXXL_MSG("Stack must be empty"); abort(); } STXXL_MSG("Deletions elapsed time: " << (Timer.mseconds() / 1000.) << " seconds : " << (double(volume) / (1024. * 1024. * Timer.mseconds() / 1000.)) << " MB/s"); std::cout << *Stats; } int main(int argc, char * argv[]) { STXXL_MSG("stxxl::pq block size: " << BLOCK_SIZE << " bytes"); #ifdef STXXL_DIRECT_IO_OFF STXXL_MSG("STXXL_DIRECT_IO_OFF is defined"); #else STXXL_MSG("STXXL_DIRECT_IO_OFF is NOT defined"); #endif if (argc < 3) { STXXL_MSG("Usage: " << argv[0] << " version #volume"); STXXL_MSG("\t version = 1: grow-shrink-stack2 with 4 byte records"); STXXL_MSG("\t version = 2: grow-shrink-stack2 with 32 byte records"); STXXL_MSG("\t version = 3: normal-stack with 4 byte records"); STXXL_MSG("\t version = 4: normal-stack with 32 byte records"); return -1; } int version = atoi(argv[1]); stxxl::int64 volume = stxxl::atoint64(argv[2]); STXXL_MSG("Allocating array with size " << MEM_2_RESERVE << " bytes to prevent file buffering."); int * array = new int[MEM_2_RESERVE / sizeof(int)]; std::fill(array, array + (MEM_2_RESERVE / sizeof(int)), 0); STXXL_MSG("Running version: " << version); STXXL_MSG("Data volume : " << volume << " bytes"); switch (version) { case 1: run_stxxl_growshrink2_stack<my_record_<4> >(volume); break; case 2: run_stxxl_growshrink2_stack<my_record_<32> >(volume); break; case 3: run_stxxl_normal_stack<my_record_<4> >(volume); break; case 4: run_stxxl_normal_stack<my_record_<32> >(volume); break; default: STXXL_MSG("Unsupported version " << version); } delete[] array; }