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

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 07:53:00 -05:00 committed by Matthew Wilcox
parent 0d4a41c1a0
commit 6478581c85
1 changed files with 44 additions and 0 deletions
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44
tools/testing/radix-tree/benchmark.c
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@ -146,6 +146,46 @@ static void benchmark_size(unsigned long size, unsigned long step, int order)
rcu_barrier();
}
static long long __benchmark_split(unsigned long index,
int old_order, int new_order)
{
struct timespec start, finish;
long long nsec;
RADIX_TREE(tree, GFP_ATOMIC);
item_insert_order(&tree, index, old_order);
clock_gettime(CLOCK_MONOTONIC, &start);
radix_tree_split(&tree, index, new_order);
clock_gettime(CLOCK_MONOTONIC, &finish);
nsec = (finish.tv_sec - start.tv_sec) * NSEC_PER_SEC +
(finish.tv_nsec - start.tv_nsec);
item_kill_tree(&tree);
return nsec;
}
static void benchmark_split(unsigned long size, unsigned long step)
{
int i, j, idx;
long long nsec = 0;
for (idx = 0; idx < size; idx += step) {
for (i = 3; i < 11; i++) {
for (j = 0; j < i; j++) {
nsec += __benchmark_split(idx, i, j);
}
}
}
printv(2, "Size %8ld, step %8ld, split time %10lld ns\n",
size, step, nsec);
}
void benchmark(void)
{
unsigned long size[] = {1 << 10, 1 << 20, 0};
@ -163,4 +203,8 @@ void benchmark(void)
for (c = 0; size[c]; c++)
for (s = 0; step[s]; s++)
benchmark_size(size[c], step[s] << 9, 9);
for (c = 0; size[c]; c++)
for (s = 0; step[s]; s++)
benchmark_split(size[c], step[s]);
}