jasder
/
simdjson
1
0
Fork 0
Code Issues Pull Requests Releases 2 Wiki Activity

Adding mispredicted branch counts.

This commit is contained in:
Daniel Lemire 2018-10-04 09:47:34 -04:00
parent 930533b6da
commit aeacd26366
1 changed files with 11 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
benchmark/parse.cpp
View File

@ -142,11 +142,13 @@ int main(int argc, char *argv[]) {
vector<int> evts;
evts.push_back(PERF_COUNT_HW_CPU_CYCLES);
evts.push_back(PERF_COUNT_HW_INSTRUCTIONS);
evts.push_back(PERF_COUNT_HW_BRANCH_MISSES);
LinuxEvents<PERF_TYPE_HARDWARE> unified(evts);
vector<u64> results;
results.resize(evts.size());
unsigned long cy1 = 0, cy2 = 0, cy3 = 0;
unsigned long cl1 = 0, cl2 = 0, cl3 = 0;
unsigned long mis1 = 0, mis2 = 0, mis3 = 0;
#endif
bool isok = true;
for (u32 i = 0; i < iterations; i++) {
@ -159,6 +161,7 @@ int main(int argc, char *argv[]) {
unified.end(results);
cy1 += results[0];
cl1 += results[1];
mis1 += results[2];
if (!isok) {
cout << "Failed out during stage 1\n";
break;
@ -170,6 +173,7 @@ int main(int argc, char *argv[]) {
unified.end(results);
cy2 += results[0];
cl2 += results[1];
mis2 += results[2];
if (!isok) {
cout << "Failed out during stage 2\n";
break;
@ -182,6 +186,7 @@ int main(int argc, char *argv[]) {
unified.end(results);
cy3 += results[0];
cl3 += results[1];
mis3 += results[2];
if (!isok) {
cout << "Failed out during stage 34\n";
break;
@ -200,22 +205,22 @@ int main(int argc, char *argv[]) {
unsigned long total = cy1 + cy2 + cy3;
printf(
"stage 1 instructions: %10lu cycles: %10lu (%.2f %%) ins/cycles: %.2f \n",
cl1 / iterations, cy1 / iterations, 100. * cy1 / total, (double)cl1 / cy1);
"stage 1 instructions: %10lu cycles: %10lu (%.2f %%) ins/cycles: %.2f mis. branches: %10lu (cycles/mis.branch %.2f) \n",
cl1 / iterations, cy1 / iterations, 100. * cy1 / total, (double)cl1 / cy1, mis1/iterations, (double)cy1/mis1);
printf(" stage 1 runs at %.2f cycles per input byte.\n",
(double)cy1 / (iterations * p.second));
printf(
"stage 2 instructions: %10lu cycles: %10lu (%.2f %%) ins/cycles: %.2f \n",
cl2 / iterations, cy2 / iterations, 100. * cy2 / total, (double)cl2 / cy2);
"stage 2 instructions: %10lu cycles: %10lu (%.2f %%) ins/cycles: %.2f mis. branches: %10lu (cycles/mis.branch %.2f) \n",
cl2 / iterations, cy2 / iterations, 100. * cy2 / total, (double)cl2 / cy2, mis2/iterations, (double)cy2/mis2);
printf(" stage 2 runs at %.2f cycles per input byte and ",
(double)cy2 / (iterations * p.second));
printf("%.2f cycles per structural character.\n",
(double)cy2 / (iterations * pj.n_structural_indexes));
printf(
"stage 3 instructions: %10lu cycles: %10lu (%.2f %%) ins/cycles: %.2f \n",
cl3 / iterations, cy3 /iterations, 100. * cy3 / total, (double)cl3 / cy3);
"stage 3 instructions: %10lu cycles: %10lu (%.2f %%) ins/cycles: %.2f mis. branches: %10lu (cycles/mis.branch %.2f)\n",
cl3 / iterations, cy3 /iterations, 100. * cy3 / total, (double)cl3 / cy3, mis3/iterations, (double)cy3/mis3);
printf(" stage 3 runs at %.2f cycles per input byte and ",
(double)cy3 / (iterations * p.second));
printf("%.2f cycles per structural character.\n",