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Modified test_2 to perform more operations.

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* Perform more adds than subtractions so that the result doesn't
  underflow.
* Include the terminating messages sent by each writer thread in the
  total item count.
This commit is contained in:
Lewis Baker 2013-12-03 06:29:32 +10:30
parent 073ee55acf
commit e4399df336
1 changed files with 6 additions and 7 deletions
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13
test/test_2.cpp
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@ -19,7 +19,7 @@ struct message
int main(int argc, char* argv[])
{
const int itemCount = 10 * 1000 * 1000;
const int itemCount = 500 * 1000 * 1000;
const size_t bufferSize = size_t(1) << 20;
const int writerBatchSize = 1;
@ -32,8 +32,6 @@ int main(int argc, char* argv[])
claimStrategy.add_claim_barrier(finishedReading);
ring_buffer<message> buffer(bufferSize);
std::vector<size_t> readerBatchSizes(bufferSize, 0);
auto start = std::chrono::high_resolution_clock::now();
@ -91,7 +89,7 @@ int main(int argc, char* argv[])
{
auto& item = buffer[range[j]];
item.m_type = i % 5 == 0 ? 0xadd : 0xdec;
item.m_type = i % 5 == 0 ? 0xdec : 0xadd;
for (int k = 0; k < 28; ++k)
{
item.m_data[k] = (i + k) % 60;
@ -115,7 +113,7 @@ int main(int argc, char* argv[])
{
auto& item = buffer[range[j]];
item.m_type = i % 5 == 0 ? 0xadd : 0xdec;
item.m_type = i % 5 == 0 ? 0xdec : 0xadd;
for (int k = 0; k < 28; ++k)
{
item.m_data[k] = (i + k) % 60;
@ -135,12 +133,13 @@ int main(int argc, char* argv[])
writer1.join();
writer2.join();
auto totalItemCount = itemCount + 2;
auto end = std::chrono::high_resolution_clock::now();
auto dur = (end - start);
auto durMS = std::chrono::duration_cast<std::chrono::milliseconds>(dur);
auto durNS = std::chrono::duration_cast<std::chrono::nanoseconds>(dur);
auto nsPerItem = durNS / (itemCount * 2);
auto nsPerItem = durNS / totalItemCount;
std::cout << result << "\n"
<< durMS.count() << "ms total time\n"