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Avoid legacy instruction penalties on x86

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Justine Tunney 2024-07-31 01:02:24 -07:00
parent 1fba310e22
commit 8d8aecb6d9
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GPG key ID: BE714B4575D6E328
16 changed files with 199 additions and 158 deletions
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24
test/ctl/set_bench.cc
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@ -22,26 +22,12 @@
#include "libc/mem/leaks.h"
#include "libc/stdio/stdio.h"
#include "libc/sysv/consts/rusage.h"
#include "libc/testlib/benchmark.h"
// #include <set>
// #define ctl std
// #define check() size()
#define BENCH(ITERATIONS, WORK_PER_RUN, CODE) \
do { \
struct timespec start = timespec_real(); \
for (int __i = 0; __i < ITERATIONS; ++__i) { \
asm volatile("" ::: "memory"); \
CODE; \
} \
long long work = (WORK_PER_RUN) * (ITERATIONS); \
double nanos = \
(timespec_tonanos(timespec_sub(timespec_real(), start)) + work - \
1) / \
(double)work; \
printf("%10g ns %2dx %s\n", nanos, (ITERATIONS), #CODE); \
} while (0)
int
rand32(void)
{
@ -68,19 +54,19 @@ main()
{
long x = 0;
ctl::set<long> s;
BENCH(1000000, 1, s.insert(rand32() % 1000000));
BENCHMARK(1000000, 1, s.insert(rand32() % 1000000));
// s.check();
BENCH(1000000, 1, {
BENCHMARK(1000000, 1, {
auto i = s.find(rand32() % 1000000);
if (i != s.end())
x += *i;
});
BENCH(1000000, 1, {
BENCHMARK(1000000, 1, {
auto i = s.lower_bound(rand32() % 1000000);
if (i != s.end())
x += *i;
});
BENCH(1000000, 1, s.erase(rand32() % 1000000));
BENCHMARK(1000000, 1, s.erase(rand32() % 1000000));
eat(x);
}