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#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <unistd.h>
#include "cached.h"
#define UNUSED __attribute__((unused))
static sig_atomic_t running;
static void
panic(const char *msg)
{
fprintf(stderr, "panic: %s\n", msg);
exit(EXIT_FAILURE);
}
static void
alarm_handler(int sig UNUSED, siginfo_t *info UNUSED, void *arg UNUSED)
{
running = 0;
}
static void
trap_signals(void)
{
struct sigaction sa;
sa.sa_sigaction = alarm_handler;
sa.sa_flags = SA_SIGINFO;
if (sigaction(SIGALRM, &sa, NULL) < 0) {
panic("failed to setup signal handler");
}
}
static void
set_alarm(void)
{
running = 1;
alarm(1);
}
static size_t
bench_malloc(size_t allocs, size_t objsize)
{
void *objs[allocs];
size_t count = 0;
while (running) {
for (size_t i = 0; i < allocs; i++) {
objs[i] = calloc(1, objsize);
count++;
}
for (size_t i = 0; i < allocs; i++) {
free(objs[i]);
}
}
return count;
}
static size_t
bench_ca_alloc(size_t allocs)
{
void *objs[allocs];
size_t count = 0;
while (running) {
for (size_t i = 0; i < allocs; i++) {
objs[i] = ca_alloc();
count++;
}
for (size_t i = 0; i < allocs; i++) {
ca_free(objs[i]);
}
}
return count;
}
static void
bench_four(void)
{
if (ca_setup(256, 4096) < 0) {
panic("failed to setup cached allocator");
}
set_alarm();
size_t allocs = bench_ca_alloc(1024);
printf("%-12s\t%9zu allocs/second\n", "huge_cache", allocs);
ca_cleanup();
}
static void
bench_one(void)
{
if (ca_setup(256, 1024) < 0) {
panic("failed to setup cached allocator");
}
set_alarm();
size_t allocs = bench_ca_alloc(1024);
printf("%-12s\t%9zu allocs/second\n", "large_cache", allocs);
ca_cleanup();
}
static void
bench_two(void)
{
if (ca_setup(256, 16) < 0) {
panic("failed to setup cached allocator");
}
set_alarm();
size_t allocs = bench_ca_alloc(1024);
printf("%-12s\t%9zu allocs/second\n", "small_cache", allocs);
ca_cleanup();
}
static void
bench_three(void)
{
set_alarm();
size_t allocs = bench_malloc(1024, 256);
printf("%-12s\t%9zu allocs/second\n", "just_malloc", allocs);
}
int
main(void)
{
trap_signals();
bench_three();
puts("");
bench_two();
bench_one();
bench_four();
exit(EXIT_SUCCESS);
}
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