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Merge "Use SI prefixes throughout the benchmark output."

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Elliott Hughes 2015-01-17 00:23:34 +00:00 committed by Gerrit Code Review
commit 481cf21e08
1 changed files with 45 additions and 12 deletions
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57
benchmarks/benchmark_main.cpp
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@ -22,7 +22,7 @@
#include <time.h>
#include <string>
#include <map>
#include <vector>
#include <inttypes.h>
@ -38,6 +38,41 @@ static BenchmarkList& Benchmarks() {
return benchmarks;
}
// Similar to the code in art, but supporting both binary and decimal prefixes.
static std::string PrettyInt(uint64_t count, size_t base) {
if (base != 2 && base != 10) abort();
// The byte thresholds at which we display amounts. A count is displayed
// in unit U when kUnitThresholds[U] <= bytes < kUnitThresholds[U+1].
static const uint64_t kUnitThresholds2[] = {
1024*1024*1024 /* Gi */, 2*1024*1024 /* Mi */, 3*1024 /* Ki */, 0,
};
static const uint64_t kUnitThresholds10[] = {
1000*1000*1000 /* G */, 2*1000*1000 /* M */, 3*1000 /* k */, 0,
};
static const uint64_t kAmountPerUnit2[] = { 1024*1024*1024, 1024*1024, 1024, 1 };
static const uint64_t kAmountPerUnit10[] = { 1000*1000*1000, 1000*1000, 1000, 1 };
static const char* const kUnitStrings2[] = { "Gi", "Mi", "Ki", "" };
static const char* const kUnitStrings10[] = { "G", "M", "k", "" };
// Which set are we using?
const uint64_t* kUnitThresholds = ((base == 2) ? kUnitThresholds2 : kUnitThresholds10);
const uint64_t* kAmountPerUnit = ((base == 2) ? kAmountPerUnit2 : kAmountPerUnit10);
const char* const* kUnitStrings = ((base == 2) ? kUnitStrings2 : kUnitStrings10);
size_t i = 0;
for (; kUnitThresholds[i] != 0; ++i) {
if (count >= kUnitThresholds[i]) {
break;
}
}
char* s = NULL;
asprintf(&s, "%" PRId64 "%s", count / kAmountPerUnit[i], kUnitStrings[i]);
std::string result(s);
free(s);
return result;
}
static int Round(int n) {
int base = 1;
while (base*10 < n) {
@ -154,27 +189,25 @@ void Benchmark::RunWithArg(int arg) {
char throughput[100];
throughput[0] = '\0';
if (g_benchmark_total_time_ns > 0 && g_bytes_processed > 0) {
double mib_processed = static_cast<double>(g_bytes_processed)/1e6;
double gib_processed = static_cast<double>(g_bytes_processed)/1e9;
double seconds = static_cast<double>(g_benchmark_total_time_ns)/1e9;
snprintf(throughput, sizeof(throughput), " %8.2f MiB/s", mib_processed/seconds);
snprintf(throughput, sizeof(throughput), " %8.3f GiB/s", gib_processed/seconds);
}
char full_name[100];
if (fn_range_ != NULL) {
if (arg >= (1<<20)) {
snprintf(full_name, sizeof(full_name), "%s/%dM", name_, arg/(1<<20));
} else if (arg >= (1<<10)) {
snprintf(full_name, sizeof(full_name), "%s/%dK", name_, arg/(1<<10));
} else {
snprintf(full_name, sizeof(full_name), "%s/%d", name_, arg);
}
snprintf(full_name, sizeof(full_name), "%s/%s", name_, PrettyInt(arg, 2).c_str());
} else {
snprintf(full_name, sizeof(full_name), "%s", name_);
}
printf("%-*s %10d %10" PRId64 "%s\n", g_name_column_width, full_name,
iterations, g_benchmark_total_time_ns/iterations, throughput);
printf("%-*s %10s %10" PRId64 "%s\n",
g_name_column_width, full_name,
PrettyInt(iterations, 10).c_str(),
g_benchmark_total_time_ns/iterations,
throughput);
fflush(stdout);
}