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/*
* Copyright (c) 2014 Kmindg <kmindg@gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <config.h>
#undef NDEBUG
#include "bitmap.h"
#include <assert.h>
#include "command-line.h"
#include "ovstest.h"
#include "timeval.h"
enum { MAX_BITS = 20 * BITMAP_ULONG_BITS };
static int
elapsed(const struct timeval *start)
{
struct timeval end;
xgettimeofday(&end);
return timeval_to_msec(&end) - timeval_to_msec(start);
}
/* Tests bitmap_equal. */
static void
test_bitmap_equal(void)
{
unsigned long *a, *b;
a = bitmap_allocate(MAX_BITS);
b = bitmap_allocate(MAX_BITS);
/* equal test */
assert(bitmap_equal(a, b, MAX_BITS));
assert(bitmap_equal(a, b, MAX_BITS - 1));
assert(bitmap_equal(a, b, MAX_BITS - (BITMAP_ULONG_BITS - 1)));
bitmap_set_multiple(a, 10 * BITMAP_ULONG_BITS, BITMAP_ULONG_BITS, true);
assert(bitmap_equal(a, b, 10 * BITMAP_ULONG_BITS));
/* non-equal test */
assert(!bitmap_equal(a, b, 11 * BITMAP_ULONG_BITS));
assert(!bitmap_equal(a, b, 11 * BITMAP_ULONG_BITS - 1));
assert(!bitmap_equal(a, b,
11 * BITMAP_ULONG_BITS - (BITMAP_ULONG_BITS - 1)));
free(b);
free(a);
}
/* Tests bitmap_scan. */
static void
test_bitmap_scan(void)
{
unsigned long *a;
a = bitmap_allocate(MAX_BITS);
/* scan for 1 */
assert(bitmap_scan(a, true, 1, BITMAP_ULONG_BITS) == BITMAP_ULONG_BITS);
assert(bitmap_scan(a, true, BITMAP_ULONG_BITS - 1, BITMAP_ULONG_BITS)
== BITMAP_ULONG_BITS);
assert(bitmap_scan(a, true, 0, BITMAP_ULONG_BITS) == BITMAP_ULONG_BITS);
assert(bitmap_scan(a, true, 0, BITMAP_ULONG_BITS + 1)
== BITMAP_ULONG_BITS + 1);
assert(bitmap_scan(a, true, 0, 2 * BITMAP_ULONG_BITS - 1)
== 2 * BITMAP_ULONG_BITS - 1);
bitmap_set1(a, MAX_BITS - 1);
assert(bitmap_scan(a, true, 0, MAX_BITS) == MAX_BITS - 1);
bitmap_set1(a, MAX_BITS - BITMAP_ULONG_BITS + 1);
assert(bitmap_scan(a, true, 3, MAX_BITS)
== MAX_BITS - BITMAP_ULONG_BITS + 1);
bitmap_set1(a, BITMAP_ULONG_BITS - 1);
assert(bitmap_scan(a, true, 7, MAX_BITS - 1) == BITMAP_ULONG_BITS - 1);
bitmap_set1(a, 0);
assert(bitmap_scan(a, true, 0, MAX_BITS - 7) == 0);
bitmap_set_multiple(a, 0, MAX_BITS, true);
/* scan for 0 */
assert(bitmap_scan(a, false, 1, BITMAP_ULONG_BITS) == BITMAP_ULONG_BITS);
assert(bitmap_scan(a, false, BITMAP_ULONG_BITS - 1, BITMAP_ULONG_BITS)
== BITMAP_ULONG_BITS);
assert(bitmap_scan(a, false, 0, BITMAP_ULONG_BITS) == BITMAP_ULONG_BITS);
assert(bitmap_scan(a, false, 0, BITMAP_ULONG_BITS + 1)
== BITMAP_ULONG_BITS + 1);
assert(bitmap_scan(a, false, 0, 2 * BITMAP_ULONG_BITS - 1)
== 2 * BITMAP_ULONG_BITS - 1);
bitmap_set0(a, MAX_BITS - 1);
assert(bitmap_scan(a, false, 0, MAX_BITS) == MAX_BITS - 1);
bitmap_set0(a, MAX_BITS - BITMAP_ULONG_BITS + 1);
assert(bitmap_scan(a, false, 3, MAX_BITS)
== MAX_BITS - BITMAP_ULONG_BITS + 1);
bitmap_set0(a, BITMAP_ULONG_BITS - 1);
assert(bitmap_scan(a, false, 7, MAX_BITS - 1) == BITMAP_ULONG_BITS - 1);
bitmap_set0(a, 0);
assert(bitmap_scan(a, false, 0, MAX_BITS - 7) == 0);
free(a);
}
static void
run_test(void (*function)(void))
{
function();
printf(".");
}
static void
run_tests(struct ovs_cmdl_context *ctx OVS_UNUSED)
{
run_test(test_bitmap_equal);
run_test(test_bitmap_scan);
printf("\n");
}
static void
run_benchmarks(struct ovs_cmdl_context *ctx)
{
int n_iter = strtol(ctx->argv[1], NULL, 10);
struct timeval start;
xgettimeofday(&start);
for (int i = 0; i < n_iter; i++) {
test_bitmap_equal();
}
printf("bitmap equal: %5d ms\n", elapsed(&start));
xgettimeofday(&start);
for (int i = 0; i < n_iter; i++) {
test_bitmap_scan();
}
printf("bitmap scan: %5d ms\n", elapsed(&start));
printf("\n");
}
static const struct ovs_cmdl_command commands[] = {
{"check", NULL, 0, 0, run_tests, OVS_RO},
{"benchmark", NULL, 1, 1, run_benchmarks, OVS_RO},
{NULL, NULL, 0, 0, NULL, OVS_RO},
};
static void
test_bitmap_main(int argc, char *argv[])
{
struct ovs_cmdl_context ctx = {
.argc = argc - 1,
.argv = argv + 1,
};
set_program_name(argv[0]);
ovs_cmdl_run_command(&ctx, commands);
}
OVSTEST_REGISTER("test-bitmap", test_bitmap_main);
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