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perf: BasicRanges static build process

master
Dnomd343 2 years ago
parent
878a0a5efc
commit
a781001835
2 changed files with 44 additions and 81 deletions
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  1. 114
      all_cases/basic_ranges.cc
  2. 11
      all_cases/main.cc

114
all_cases/basic_ranges.cc
View File

@ -15,11 +15,44 @@ inline uint32_t binary_count(uint32_t bin) { // get number of non-zero bits
return bin & 0b111111;
}
void BasicRanges::generate_ranges(int n1, int n2, int n3, int n4) {
const std::vector<uint32_t>* BasicRanges::get_basic_ranges() { // get const ptr of basic ranges
if (basic_ranges.empty()) {
build_basic_ranges(); // basic ranges initialize
}
return &basic_ranges; // return ptr
}
void BasicRanges::build_basic_ranges() { // build basic ranges
if (basic_ranges_available) {
return; // basic ranges already built
}
if (basic_ranges_building.try_lock()) { // lock success -> start building
/// 0x0 -> 00 | 1x2 -> 01 | 2x1 -> 10 | 1x1 -> 11
for (int n = 0; n <= 7; ++n) { // number of 1x2 and 2x1 block -> 0 ~ 7
for (int n_2x1 = 0; n_2x1 <= n; ++n_2x1) { // number of 2x1 block -> 0 ~ n
for (int n_1x1 = 0; n_1x1 <= (14 - n * 2); ++n_1x1) { // number of 1x1 block -> 0 ~ (14 - 2n)
int n_1x2 = n - n_2x1;
int n_space = 16 - n * 2 - n_1x1;
generate_ranges(n_space, n_1x2, n_2x1, n_1x1); // generate target ranges
}
}
}
std::sort(basic_ranges.begin(), basic_ranges.end()); // sort basic ranges
for (uint32_t &range : basic_ranges) {
range = Common::range_reverse(range); // basic ranges reverse
}
basic_ranges_available = true; // set available flag
} else { // another thread building
basic_ranges_building.lock(); // blocking waiting
}
basic_ranges_building.unlock();
}
void BasicRanges::generate_ranges(int n1, int n2, int n3, int n4) { // generate specific basic ranges
int len, limit;
constexpr uint32_t M_01 = 0b01 << 30;
constexpr uint32_t M_10 = 0b10 << 30;
constexpr uint32_t M_11 = 0b11 << 30;
constexpr uint32_t MASK_01 = 0b01 << 30;
constexpr uint32_t MASK_10 = 0b10 << 30;
constexpr uint32_t MASK_11 = 0b11 << 30;
std::vector<uint32_t> cache_1, cache_2;
len = n1 + n2;
@ -32,7 +65,7 @@ void BasicRanges::generate_ranges(int n1, int n2, int n3, int n4) {
for (int i = 0; i < len; ++i) { // generate range base on binary value
range >>= 2;
if ((bin >> i) & 0b1) { // non-zero bit
range |= M_01; // 01000...
range |= MASK_01;
}
}
cache_1.emplace_back(range); // insert into first layer
@ -48,10 +81,10 @@ void BasicRanges::generate_ranges(int n1, int n2, int n3, int n4) {
uint32_t range = 0;
for (int i = 0; i < len; ++i) { // generate range base on binary value
if ((bin >> i) & 0b1) { // non-zero bit
(range >>= 2) |= M_10; // 10000...
(range >>= 2) |= MASK_10;
continue;
}
(range >>= 2) |= base & M_11;
(range >>= 2) |= base & MASK_11;
base <<= 2;
}
cache_2.emplace_back(range); // insert into second layer
@ -68,74 +101,13 @@ void BasicRanges::generate_ranges(int n1, int n2, int n3, int n4) {
uint32_t range = 0;
for (int i = 0; i < len; ++i) { // generate range base on binary value
if ((bin >> i) & 0b1) { // non-zero bit
(range >>= 2) |= M_11; // 11000...
(range >>= 2) |= MASK_11;
continue;
}
(range >>= 2) |= base & M_11;
(range >>= 2) |= base & MASK_11;
base <<= 2;
}
basic_ranges.emplace_back(range); // insert into release ranges
}
}
}
#include <thread>
#include <iostream>
void BasicRanges::build_basic_ranges() {
std::cout << std::this_thread::get_id() << " enter build function" << std::endl;
if (basic_ranges_available) {
std::cout << std::this_thread::get_id() << " data already built -> skip" << std::endl;
return; // basic ranges already built
}
if (basic_ranges_building.try_lock()) { // lock success -> not building
std::cout << std::this_thread::get_id() << " try lock success -> start build process" << std::endl;
// AllCases::basic_ranges.emplace_back(0);
// AllCases::basic_ranges.emplace_back(1);
// AllCases::basic_ranges.emplace_back(2);
// sleep(2); // assume using a lot of time
for (int n = 0; n <= 7; ++n) { // number of 1x2 and 2x1 block -> 0 ~ 7
for (int n_2x1 = 0; n_2x1 <= n; ++n_2x1) { // number of 2x1 block -> 0 ~ n
for (int n_1x1 = 0; n_1x1 <= (14 - n * 2); ++n_1x1) { // number of 1x1 block -> 0 ~ (14 - 2n)
int n_1x2 = n - n_2x1;
int n_space = 16 - n * 2 - n_1x1;
/// 0x0 -> 00 | 1x2 -> 01 | 2x1 -> 10 | 1x1 -> 11
generate_ranges(n_space, n_1x2, n_2x1, n_1x1); // generate target ranges
}
}
basic_ranges.emplace_back(range); // insert into release
}
std::sort(basic_ranges.begin(), basic_ranges.end()); // sort basic ranges
for (uint32_t &range : basic_ranges) {
range = Common::range_reverse(range); // range reverse
}
basic_ranges_available = true; // enable available flag
std::cout << std::this_thread::get_id() << " build complete -> continue" << std::endl;
} else { // another thread building
std::cout << std::this_thread::get_id() << " another thread building -> wait" << std::endl;
basic_ranges_building.lock(); // blocking wait
}
std::cout << std::this_thread::get_id() << " work complete -> unlock" << std::endl;
basic_ranges_building.unlock();
}
const std::vector<uint32_t>* BasicRanges::get_basic_ranges() {
if (basic_ranges.empty()) {
build_basic_ranges(); // basic ranges initialize
}
return &basic_ranges;
}

11
all_cases/main.cc
View File

@ -3,25 +3,16 @@
#include "basic_ranges.h"
#include <thread>
#include <unistd.h>
int main() {
std::cout << BasicRanges::get_basic_ranges()->size() << std::endl;
std::thread t1(BasicRanges::build_basic_ranges);
// usleep(10);
std::thread t2(BasicRanges::build_basic_ranges);
// usleep(10);
std::thread t3(BasicRanges::build_basic_ranges);
// usleep(10);
t1.join();
t2.join();
t3.join();
BasicRanges::build_basic_ranges();
// BasicRanges::build_basic_ranges();
std::cout << BasicRanges::get_basic_ranges()->size() << std::endl;
return 0;

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