#include <vlib/vlib.h>
#include <vlib/buffer_funcs.h>
-#define TEST_I(_cond, _comment, _args...) \
-({ \
- int _evald = (_cond); \
- if (!(_evald)) { \
- fformat(stderr, "FAIL:%d: " _comment "\n", \
- __LINE__, ##_args); \
- } else { \
- fformat(stderr, "PASS:%d: " _comment "\n", \
- __LINE__, ##_args); \
- } \
- _evald; \
-})
-
-#define TEST(_cond, _comment, _args...) \
-{ \
- if (!TEST_I(_cond, _comment, ##_args)) { \
- return 1; \
- } \
+#define TEST_I(_cond, _comment, _args...) \
+ ({ \
+ int _evald = (0 == (_cond)); \
+ if (_evald) \
+ { \
+ fformat (stderr, "FAIL:%d: " _comment "\n", __LINE__, ##_args); \
+ } \
+ else \
+ { \
+ fformat (stderr, "PASS:%d: " _comment "\n", __LINE__, ##_args); \
+ } \
+ _evald; \
+ })
+
+#define TEST(_cond, _comment, _args...) \
+ { \
+ if (TEST_I (_cond, _comment, ##_args)) \
+ { \
+ goto err; \
+ } \
+ }
+
+typedef struct
+{
+ i16 current_data;
+ u16 current_length;
+ u8 ref_count;
+} chained_buffer_template_t;
+
+static int
+build_chain (vlib_main_t *vm, const chained_buffer_template_t *tmpl, u32 n,
+ clib_random_buffer_t *randbuf, u8 **rand, vlib_buffer_t **b_,
+ u32 *bi_)
+{
+ vlib_buffer_t *bufs[2 * VLIB_BUFFER_LINEARIZE_MAX], **b = bufs;
+ u32 bis[2 * VLIB_BUFFER_LINEARIZE_MAX + 1], *bi = bis;
+ u32 n_alloc;
+
+ if (rand)
+ vec_reset_length (*rand);
+
+ ASSERT (n <= ARRAY_LEN (bufs));
+ n_alloc = vlib_buffer_alloc (vm, bi, n);
+ if (n_alloc != n)
+ {
+ vlib_buffer_free (vm, bi, n_alloc);
+ return 0;
+ }
+
+ vlib_get_buffers (vm, bis, bufs, n);
+
+ while (n > 0)
+ {
+ b[0]->next_buffer = bi[1];
+ b[0]->flags |= VLIB_BUFFER_NEXT_PRESENT;
+ b[0]->current_data = tmpl->current_data;
+ b[0]->current_length = tmpl->current_length;
+ b[0]->ref_count = 0xff == tmpl->ref_count ? 1 : tmpl->ref_count;
+
+ if (rand)
+ {
+ const u16 len = b[0]->current_length;
+ if (len)
+ {
+ vec_add (*rand, clib_random_buffer_get_data (randbuf, len), len);
+ void *dst = vlib_buffer_get_current (b[0]);
+ const void *src =
+ vec_elt_at_index (*rand, vec_len (*rand) - len);
+ clib_memcpy_fast (dst, src, len);
+ }
+ }
+
+ b++;
+ bi++;
+ tmpl++;
+ n--;
+ }
+
+ b[-1]->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
+
+ *b_ = bufs[0];
+ *bi_ = bis[0];
+ return 1;
+}
+
+static int
+check_chain (vlib_main_t *vm, vlib_buffer_t *b, const u8 *rand)
+{
+ int len_chain = vlib_buffer_length_in_chain (vm, b);
+ int len;
+
+ /* check for data corruption */
+ if (clib_memcmp (vlib_buffer_get_current (b), vec_elt_at_index (rand, 0),
+ b->current_length))
+ return 0;
+ len = b->current_length;
+ while (b->flags & VLIB_BUFFER_NEXT_PRESENT)
+ {
+ b = vlib_get_buffer (vm, b->next_buffer);
+ if (clib_memcmp (vlib_buffer_get_current (b),
+ vec_elt_at_index (rand, len), b->current_length))
+ return 0;
+ len += b->current_length;
+ }
+
+ /* check for data truncation */
+ if (len != vec_len (rand))
+ return 0;
+
+ /* check total length update is correct */
+ if (len != len_chain)
+ return 0;
+
+ return 1;
+}
+
+static int
+test_chain (vlib_main_t *vm, const chained_buffer_template_t *tmpl,
+ const u32 n, const int clone_off, clib_random_buffer_t *randbuf,
+ u8 **rand)
+{
+ vlib_buffer_t *b;
+ u32 bi[2];
+ int ret = 0;
+
+ if (!build_chain (vm, tmpl, n, randbuf, rand, &b, bi))
+ goto err0;
+
+ if (clone_off)
+ {
+ if (2 != vlib_buffer_clone (vm, bi[0], bi, 2, clone_off))
+ goto err1;
+ b = vlib_get_buffer (vm, bi[0]);
+ }
+
+ if (!(ret = vlib_buffer_chain_linearize (vm, b)))
+ goto err2;
+
+ if (!check_chain (vm, b, *rand))
+ {
+ ret = 0;
+ goto err2;
+ }
+
+err2:
+ if (clone_off)
+ vlib_buffer_free_one (vm, bi[1]);
+err1:
+ vlib_buffer_free_one (vm, bi[0]);
+err0:
+ return ret;
}
-/* test function for a specific case where current_data is negative, verify
- * that there is no crash */
static int
-linearize_negative_current_data (vlib_main_t * vm)
+linearize_test (vlib_main_t *vm)
{
- u32 bi[32];
- TEST (ARRAY_LEN (bi) == vlib_buffer_alloc (vm, bi, ARRAY_LEN (bi)),
- "buff alloc");
+ chained_buffer_template_t tmpl[VLIB_BUFFER_LINEARIZE_MAX];
+ clib_random_buffer_t randbuf;
u32 data_size = vlib_buffer_get_default_data_size (vm);
- u32 i;
- for (i = 0; i < ARRAY_LEN (bi) - 1; ++i)
+ u8 *rand = 0;
+ int ret = 0;
+ int i;
+
+ clib_random_buffer_init (&randbuf, 0);
+
+ clib_memset (tmpl, 0xff, sizeof (tmpl));
+ for (i = 0; i < 2; i++)
{
- vlib_buffer_t *b = vlib_get_buffer (vm, bi[i]);
- b->next_buffer = bi[i + 1];
- b->flags |= VLIB_BUFFER_NEXT_PRESENT;
- b->current_data = -14;
- b->current_length = 14 + data_size;
+ tmpl[i].current_data = -14;
+ tmpl[i].current_length = 14 + data_size;
}
+ TEST (2 == test_chain (vm, tmpl, 2, 0, &randbuf, &rand),
+ "linearize chain with negative current data");
- (void) vlib_buffer_chain_linearize (vm, vlib_get_buffer (vm, bi[0]));
+ clib_memset (tmpl, 0xff, sizeof (tmpl));
+ tmpl[0].current_data = 12;
+ tmpl[0].current_length = data_size - 12;
+ tmpl[1].current_data = 0;
+ tmpl[1].current_length = 0;
+ TEST (1 == test_chain (vm, tmpl, 2, 0, &randbuf, &rand),
+ "linearize chain with empty next");
- return 0;
+ clib_memset (tmpl, 0xff, sizeof (tmpl));
+ tmpl[0].current_data = 0;
+ tmpl[0].current_length = data_size - 17;
+ tmpl[1].current_data = -5;
+ tmpl[1].current_length = 3;
+ tmpl[2].current_data = 17;
+ tmpl[2].current_length = 9;
+ tmpl[3].current_data = 3;
+ tmpl[3].current_length = 5;
+ TEST (1 == test_chain (vm, tmpl, 4, 0, &randbuf, &rand),
+ "linearize chain into a single buffer");
+
+ clib_memset (tmpl, 0xff, sizeof (tmpl));
+ tmpl[0].current_data = 0;
+ tmpl[0].current_length = data_size - 2;
+ tmpl[1].current_data = -VLIB_BUFFER_PRE_DATA_SIZE;
+ tmpl[1].current_length = 20;
+ tmpl[2].current_data = data_size - 10;
+ tmpl[2].current_length = 10;
+ tmpl[3].current_data = 0;
+ tmpl[3].current_length = data_size;
+ TEST (2 == test_chain (vm, tmpl, 4, data_size - 1, &randbuf, &rand),
+ "linearize cloned chain");
+
+ clib_memset (tmpl, 0xff, sizeof (tmpl));
+ for (i = 0; i < 100; i++)
+ {
+ u8 *r = clib_random_buffer_get_data (&randbuf, 1);
+ int n = clib_max (r[0] % ARRAY_LEN (tmpl), 1);
+ int j;
+ for (j = 0; j < n; j++)
+ {
+ r = clib_random_buffer_get_data (&randbuf, 3);
+ i16 current_data = (i16) r[0] - VLIB_BUFFER_PRE_DATA_SIZE;
+ u16 current_length = *(u16 *) (r + 1) % (data_size - current_data);
+ tmpl[j].current_data = current_data;
+ tmpl[j].current_length = current_length;
+ }
+ r = clib_random_buffer_get_data (&randbuf, 1);
+ TEST (
+ test_chain (vm, tmpl, n, r[0] > 250 ? r[0] % 128 : 0, &randbuf, &rand),
+ "linearize random chain %d", i);
+ }
+
+ ret = 1;
+err:
+ clib_random_buffer_free (&randbuf);
+ vec_free (rand);
+ return ret;
}
static clib_error_t *
vlib_cli_command_t * cmd)
{
- if (linearize_negative_current_data (vm))
+ if (!linearize_test (vm))
{
- return clib_error_return (0, "linearize_negative_current_data failed");
+ return clib_error_return (0, "linearize test failed");
}
- return (NULL);
+ return 0;
}
/* *INDENT-OFF* */
};
/* *INDENT-ON* */
+static clib_error_t *
+test_linearize_speed_fn (vlib_main_t *vm, unformat_input_t *input,
+ vlib_cli_command_t *cmd)
+{
+ /* typical 9000-bytes TCP jumbo frames */
+ const chained_buffer_template_t tmpl[5] = { { 14, 2034, 1 },
+ { 0, 2048, 1 },
+ { 0, 2048, 1 },
+ { 0, 2048, 1 },
+ { 0, 808, 1 } };
+ int i, j;
+
+ for (i = 0; i < 10; i++)
+ {
+ u64 tot = 0;
+ for (j = 0; j < 100000; j++)
+ {
+ vlib_buffer_t *b;
+ u32 bi;
+
+ if (!build_chain (vm, tmpl, 5, 0, 0, &b, &bi))
+ return clib_error_create ("build_chain() failed");
+
+ CLIB_COMPILER_BARRIER ();
+ u64 start = clib_cpu_time_now ();
+ CLIB_COMPILER_BARRIER ();
+
+ vlib_buffer_chain_linearize (vm, b);
+
+ CLIB_COMPILER_BARRIER ();
+ tot += clib_cpu_time_now () - start;
+ CLIB_COMPILER_BARRIER ();
+
+ vlib_buffer_free_one (vm, bi);
+ }
+ vlib_cli_output (vm, "%.03f ticks/call", (f64) tot / j);
+ }
+
+ return 0;
+}
+
+VLIB_CLI_COMMAND (test_linearize_speed_command, static) = {
+ .path = "test chained-buffer-linearization speed",
+ .short_help = "test chained-buffer-linearization speed",
+ .function = test_linearize_speed_fn,
+};
+
/*
* fd.io coding-style-patch-verification: ON
*
Code Review / vpp.git / blobdiff