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radix tree test suite: Add performance test for radix_tree_join() 

Signed-off-by: Rehas Sachdeva <aquannie@gmail.com>
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
This commit is contained in:
Rehas Sachdeva 2017-02-27 08:11:00 -05:00 committed by Matthew Wilcox
parent 6478581c85
commit 54f4d3341c
1 changed files with 47 additions and 0 deletions
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47
tools/testing/radix-tree/benchmark.c
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@ -186,6 +186,50 @@ static void benchmark_split(unsigned long size, unsigned long step)
}
static long long __benchmark_join(unsigned long index,
unsigned order1, unsigned order2)
{
unsigned long loc;
struct timespec start, finish;
long long nsec;
void *item, *item2 = item_create(index + 1, order1);
RADIX_TREE(tree, GFP_KERNEL);
item_insert_order(&tree, index, order2);
item = radix_tree_lookup(&tree, index);
clock_gettime(CLOCK_MONOTONIC, &start);
radix_tree_join(&tree, index + 1, order1, item2);
clock_gettime(CLOCK_MONOTONIC, &finish);
nsec = (finish.tv_sec - start.tv_sec) * NSEC_PER_SEC +
(finish.tv_nsec - start.tv_nsec);
loc = find_item(&tree, item);
if (loc == -1)
free(item);
item_kill_tree(&tree);
return nsec;
}
static void benchmark_join(unsigned long step)
{
int i, j, idx;
long long nsec = 0;
for (idx = 0; idx < 1 << 10; idx += step) {
for (i = 1; i < 15; i++) {
for (j = 0; j < i; j++) {
nsec += __benchmark_join(idx, i, j);
}
}
}
printv(2, "Size %8d, step %8ld, join time %10lld ns\n",
1 << 10, step, nsec);
}
void benchmark(void)
{
unsigned long size[] = {1 << 10, 1 << 20, 0};
@ -207,4 +251,7 @@ void benchmark(void)
for (c = 0; size[c]; c++)
for (s = 0; step[s]; s++)
benchmark_split(size[c], step[s]);
for (s = 0; step[s]; s++)
benchmark_join(step[s]);
}