159 lines
3.9 KiB
C
159 lines
3.9 KiB
C
/*
|
|
* benchmark.c:
|
|
* Author: Konstantin Khlebnikov <koct9i@gmail.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*/
|
|
#include <linux/radix-tree.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/errno.h>
|
|
#include <time.h>
|
|
#include "test.h"
|
|
|
|
#define NSEC_PER_SEC 1000000000L
|
|
|
|
static long long benchmark_iter(struct radix_tree_root *root, bool tagged)
|
|
{
|
|
volatile unsigned long sink = 0;
|
|
struct radix_tree_iter iter;
|
|
struct timespec start, finish;
|
|
long long nsec;
|
|
int l, loops = 1;
|
|
void **slot;
|
|
|
|
#ifdef BENCHMARK
|
|
again:
|
|
#endif
|
|
clock_gettime(CLOCK_MONOTONIC, &start);
|
|
for (l = 0; l < loops; l++) {
|
|
if (tagged) {
|
|
radix_tree_for_each_tagged(slot, root, &iter, 0, 0)
|
|
sink ^= (unsigned long)slot;
|
|
} else {
|
|
radix_tree_for_each_slot(slot, root, &iter, 0)
|
|
sink ^= (unsigned long)slot;
|
|
}
|
|
}
|
|
clock_gettime(CLOCK_MONOTONIC, &finish);
|
|
|
|
nsec = (finish.tv_sec - start.tv_sec) * NSEC_PER_SEC +
|
|
(finish.tv_nsec - start.tv_nsec);
|
|
|
|
#ifdef BENCHMARK
|
|
if (loops == 1 && nsec * 5 < NSEC_PER_SEC) {
|
|
loops = NSEC_PER_SEC / nsec / 4 + 1;
|
|
goto again;
|
|
}
|
|
#endif
|
|
|
|
nsec /= loops;
|
|
return nsec;
|
|
}
|
|
|
|
static void benchmark_insert(struct radix_tree_root *root,
|
|
unsigned long size, unsigned long step)
|
|
{
|
|
struct timespec start, finish;
|
|
unsigned long index;
|
|
long long nsec;
|
|
|
|
clock_gettime(CLOCK_MONOTONIC, &start);
|
|
|
|
for (index = 0 ; index < size ; index += step)
|
|
item_insert(root, index);
|
|
|
|
clock_gettime(CLOCK_MONOTONIC, &finish);
|
|
|
|
nsec = (finish.tv_sec - start.tv_sec) * NSEC_PER_SEC +
|
|
(finish.tv_nsec - start.tv_nsec);
|
|
|
|
printv(2, "Size: %8ld, step: %8ld, insertion: %15lld ns\n",
|
|
size, step, nsec);
|
|
}
|
|
|
|
static void benchmark_tagging(struct radix_tree_root *root,
|
|
unsigned long size, unsigned long step)
|
|
{
|
|
struct timespec start, finish;
|
|
unsigned long index;
|
|
long long nsec;
|
|
|
|
clock_gettime(CLOCK_MONOTONIC, &start);
|
|
|
|
for (index = 0 ; index < size ; index += step)
|
|
radix_tree_tag_set(root, index, 0);
|
|
|
|
clock_gettime(CLOCK_MONOTONIC, &finish);
|
|
|
|
nsec = (finish.tv_sec - start.tv_sec) * NSEC_PER_SEC +
|
|
(finish.tv_nsec - start.tv_nsec);
|
|
|
|
printv(2, "Size: %8ld, step: %8ld, tagging: %17lld ns\n",
|
|
size, step, nsec);
|
|
}
|
|
|
|
static void benchmark_delete(struct radix_tree_root *root,
|
|
unsigned long size, unsigned long step)
|
|
{
|
|
struct timespec start, finish;
|
|
unsigned long index;
|
|
long long nsec;
|
|
|
|
clock_gettime(CLOCK_MONOTONIC, &start);
|
|
|
|
for (index = 0 ; index < size ; index += step)
|
|
item_delete(root, index);
|
|
|
|
clock_gettime(CLOCK_MONOTONIC, &finish);
|
|
|
|
nsec = (finish.tv_sec - start.tv_sec) * NSEC_PER_SEC +
|
|
(finish.tv_nsec - start.tv_nsec);
|
|
|
|
printv(2, "Size: %8ld, step: %8ld, deletion: %16lld ns\n",
|
|
size, step, nsec);
|
|
}
|
|
|
|
static void benchmark_size(unsigned long size, unsigned long step)
|
|
{
|
|
RADIX_TREE(tree, GFP_KERNEL);
|
|
long long normal, tagged;
|
|
|
|
benchmark_insert(&tree, size, step);
|
|
benchmark_tagging(&tree, size, step);
|
|
|
|
tagged = benchmark_iter(&tree, true);
|
|
normal = benchmark_iter(&tree, false);
|
|
|
|
printv(2, "Size: %8ld, step: %8ld, tagged iteration: %8lld ns\n",
|
|
size, step, tagged);
|
|
printv(2, "Size: %8ld, step: %8ld, normal iteration: %8lld ns\n",
|
|
size, step, normal);
|
|
|
|
benchmark_delete(&tree, size, step);
|
|
|
|
item_kill_tree(&tree);
|
|
rcu_barrier();
|
|
}
|
|
|
|
void benchmark(void)
|
|
{
|
|
unsigned long size[] = {1 << 10, 1 << 20, 0};
|
|
unsigned long step[] = {1, 2, 7, 15, 63, 64, 65,
|
|
128, 256, 512, 12345, 0};
|
|
int c, s;
|
|
|
|
printv(1, "starting benchmarks\n");
|
|
printv(1, "RADIX_TREE_MAP_SHIFT = %d\n", RADIX_TREE_MAP_SHIFT);
|
|
|
|
for (c = 0; size[c]; c++)
|
|
for (s = 0; step[s]; s++)
|
|
benchmark_size(size[c], step[s]);
|
|
}
|