diff options
Diffstat (limited to 'src/vppinfra/test/ip_csum.c')
| -rw-r--r-- | src/vppinfra/test/ip_csum.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/src/vppinfra/test/ip_csum.c b/src/vppinfra/test/ip_csum.c new file mode 100644 index 00000000000..9387336ad7d --- /dev/null +++ b/src/vppinfra/test/ip_csum.c @@ -0,0 +1,179 @@ +/* SPDX-License-Identifier: Apache-2.0 + * Copyright(c) 2021 Cisco Systems, Inc. + */ + +#include <vppinfra/format.h> +#include <vppinfra/test/test.h> +#include <vppinfra/vector/ip_csum.h> + +typedef struct +{ + struct + { + u8 *src; + u32 count; + } chunk[5]; + u16 result; +} ip_csum_test_t; + +static u8 test1[] = { 0x45, 0x00, 0x00, 0x73, 0x00, 0x00, 0x40, + 0x00, 0x40, 0x11, 0x00, 0x00, 0xc0, 0xa8, + 0x00, 0x01, 0xc0, 0xa8, 0x00, 0xc7, 0x00 }; +#define TEST_LEN(x) (ARRAY_LEN (x) - 1) + +static ip_csum_test_t tests[] = { { + .chunk[0].src = test1, + .chunk[0].count = TEST_LEN (test1), + .result = 0x61b8, + }, + { + .chunk[0].src = test1, + .chunk[0].count = 1, + .chunk[1].src = test1 + 1, + .chunk[1].count = 2, + .chunk[2].src = test1 + 3, + .chunk[2].count = 3, + .chunk[3].src = test1 + 6, + .chunk[3].count = 4, + .chunk[4].src = test1 + 10, + .chunk[4].count = TEST_LEN (test1) - 10, + .result = 0x61b8, + }, + { + .chunk[0].count = 1, + .result = 0xff0f, + }, + { + .chunk[0].count = 2, + .result = 0x080f, + }, + { + .chunk[0].count = 3, + .result = 0x0711, + }, + { + .chunk[0].count = 4, + .result = 0x1210, + }, + { + .chunk[0].count = 63, + .result = 0xda01, + }, + { + .chunk[0].count = 64, + .result = 0xe100, + }, + { + .chunk[0].count = 65, + .result = 0xe010, + }, + { + .chunk[0].count = 65535, + .result = 0xfc84, + }, + { + .chunk[0].count = 65536, + .result = 0xffff, + } }; + +static clib_error_t * +test_clib_ip_csum (clib_error_t *err) +{ + u8 *buf; + buf = test_mem_alloc (65536); + for (int i = 0; i < 65536; i++) + buf[i] = 0xf0 + ((i * 7) & 0xf); + + for (int i = 0; i < ARRAY_LEN (tests); i++) + { + clib_ip_csum_t c = {}; + ip_csum_test_t *t = tests + i; + u16 rv; + + for (int j = 0; j < ARRAY_LEN (((ip_csum_test_t *) 0)->chunk); j++) + if (t->chunk[j].count > 0) + { + if (t->chunk[j].src == 0) + clib_ip_csum_chunk (&c, buf, t->chunk[j].count); + else + clib_ip_csum_chunk (&c, t->chunk[j].src, t->chunk[j].count); + } + rv = clib_ip_csum_fold (&c); + + if (rv != tests[i].result) + { + err = clib_error_return (err, + "bad checksum in test case %u (expected " + "0x%04x, calculated 0x%04x)", + i, tests[i].result, rv); + goto done; + } + } +done: + test_mem_free (buf); + return err; +} + +void __test_perf_fn +perftest_ip4_hdr (test_perf_t *tp) +{ + u32 n = tp->n_ops; + u8 *data = test_mem_alloc_and_splat (20, n, (void *) &test1); + u16 *res = test_mem_alloc (n * sizeof (u16)); + + test_perf_event_enable (tp); + for (int i = 0; i < n; i++) + res[i] = clib_ip_csum (data + i * 20, 20); + test_perf_event_disable (tp); + + test_mem_free (data); + test_mem_free (res); +} + +void __test_perf_fn +perftest_tcp_payload (test_perf_t *tp) +{ + u32 n = tp->n_ops; + volatile uword *lenp = &tp->arg0; + u8 *data = test_mem_alloc_and_splat (20, n, (void *) &test1); + u16 *res = test_mem_alloc (n * sizeof (u16)); + + test_perf_event_enable (tp); + for (int i = 0; i < n; i++) + res[i] = clib_ip_csum (data + i * lenp[0], lenp[0]); + test_perf_event_disable (tp); + + test_mem_free (data); + test_mem_free (res); +} + +void __test_perf_fn +perftest_byte (test_perf_t *tp) +{ + volatile uword *np = &tp->n_ops; + u8 *data = test_mem_alloc_and_fill_inc_u8 (*np, 0, 0); + u16 *res = test_mem_alloc (sizeof (u16)); + + test_perf_event_enable (tp); + res[0] = clib_ip_csum (data, np[0]); + test_perf_event_disable (tp); + + test_mem_free (data); + test_mem_free (res); +} + +REGISTER_TEST (clib_ip_csum) = { + .name = "clib_ip_csum", + .fn = test_clib_ip_csum, + .perf_tests = PERF_TESTS ( + { .name = "fixed size (per IPv4 Header)", + .n_ops = 1024, + .fn = perftest_ip4_hdr }, + { .name = "fixed size (per 1460 byte block)", + .n_ops = 16, + .arg0 = 1460, + .fn = perftest_tcp_payload }, + { .name = "variable size (per byte)", .n_ops = 16384, .fn = perftest_byte } + + ), +}; |