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radix tree test suite: Add performance benchmarks

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Add performance benchmarks for radix tree insertion, tagging and deletion.

Signed-off-by: Rehas Sachdeva <aquannie@gmail.com>
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
This commit is contained in:
Rehas Sachdeva 2017-02-26 16:17:00 -05:00 committed by Matthew Wilcox
parent c629a344ac
commit 0d4a41c1a0
1 changed files with 75 additions and 7 deletions
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82
tools/testing/radix-tree/benchmark.c
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@ -17,6 +17,9 @@
#include <time.h>
#include "test.h"
#define for_each_index(i, base, order) \
for (i = base; i < base + (1 << order); i++)
#define NSEC_PER_SEC 1000000000L
static long long benchmark_iter(struct radix_tree_root *root, bool tagged)
@ -57,22 +60,87 @@ again:
return nsec;
}
static void benchmark_insert(struct radix_tree_root *root,
unsigned long size, unsigned long step, int order)
{
struct timespec start, finish;
unsigned long index;
long long nsec;
clock_gettime(CLOCK_MONOTONIC, &start);
for (index = 0 ; index < size ; index += step)
item_insert_order(root, index, order);
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, order: %d, insertion: %15lld ns\n",
size, step, order, nsec);
}
static void benchmark_tagging(struct radix_tree_root *root,
unsigned long size, unsigned long step, int order)
{
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, order: %d, tagging: %17lld ns\n",
size, step, order, nsec);
}
static void benchmark_delete(struct radix_tree_root *root,
unsigned long size, unsigned long step, int order)
{
struct timespec start, finish;
unsigned long index, i;
long long nsec;
clock_gettime(CLOCK_MONOTONIC, &start);
for (index = 0 ; index < size ; index += step)
for_each_index(i, index, order)
item_delete(root, i);
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, order: %d, deletion: %16lld ns\n",
size, step, order, nsec);
}
static void benchmark_size(unsigned long size, unsigned long step, int order)
{
RADIX_TREE(tree, GFP_KERNEL);
long long normal, tagged;
unsigned long index;
for (index = 0 ; index < size ; index += step) {
item_insert_order(&tree, index, order);
radix_tree_tag_set(&tree, index, 0);
}
benchmark_insert(&tree, size, step, order);
benchmark_tagging(&tree, size, step, order);
tagged = benchmark_iter(&tree, true);
normal = benchmark_iter(&tree, false);
printv(2, "Size %ld, step %6ld, order %d tagged %10lld ns, normal %10lld ns\n",
size, step, order, tagged, normal);
printv(2, "Size: %8ld, step: %8ld, order: %d, tagged iteration: %8lld ns\n",
size, step, order, tagged);
printv(2, "Size: %8ld, step: %8ld, order: %d, normal iteration: %8lld ns\n",
size, step, order, normal);
benchmark_delete(&tree, size, step, order);
item_kill_tree(&tree);
rcu_barrier();