--- /dev/null
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright(c) 2021 Cisco Systems, Inc.
+ */
+
+#include <vlib/vlib.h>
+#include <vppinfra/time.h>
+#include <vppinfra/cache.h>
+#include <vppinfra/error.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/ip/ip.h>
+#include <vnet/gso/gso.h>
+#include <vnet/gso/hdr_offset_parser.h>
+#include <vnet/tcp/tcp_packet.h>
+
+#define MAX_GSO_PACKET_SIZE (TCP_MAX_GSO_SZ - 1)
+#define MIN_GSO_SEGMENT_SIZE 128
+#define MAX_GSO_SEGMENT_SIZE 2048
+#define DEFAULT_GSO_SEGMENT_SIZE 1448
+
+typedef struct _gso_test_data
+{
+ const char *name;
+ const char *description;
+ u8 *data;
+ u32 data_size;
+ u32 l4_hdr_len;
+ u8 is_l2;
+ u8 is_ip6;
+ struct _gso_test_data *next;
+} gso_test_data_t;
+
+typedef struct
+{
+ int verbose;
+
+ char *gso_name;
+ u32 warmup_rounds;
+ u32 rounds;
+ u32 n_buffers;
+ u32 buffer_size;
+ u32 packet_size;
+ u32 gso_size;
+ gso_test_data_t *gso_test_data;
+} gso_test_main_t;
+
+gso_test_main_t gso_test_main;
+
+#define GSO_TEST_REGISTER_DATA(x, ...) \
+ __VA_ARGS__ gso_test_data_t __gso_test_data_##x; \
+ static void __clib_constructor __gso_test_data_fn_##x (void) \
+ { \
+ gso_test_main_t *gtm = &gso_test_main; \
+ __gso_test_data_##x.next = gtm->gso_test_data; \
+ gtm->gso_test_data = &__gso_test_data_##x; \
+ } \
+ __VA_ARGS__ gso_test_data_t __gso_test_data_##x
+
+// ipv4
+u8 gso_ipv4_tcp_data[64] = {
+ 0x02, 0xfe, 0x39, 0xe5, 0x09, 0x8f, 0x02, 0xfe, 0x2d, 0x18, 0x63, 0x18, 0x08,
+ 0x00, 0x45, 0x00, 0x05, 0xdc, 0xdb, 0x42, 0x40, 0x00, 0x40, 0x06, 0xc4, 0x85,
+ 0xc0, 0xa8, 0x0a, 0x02, 0xc0, 0xa8, 0x0a, 0x01, 0xd8, 0xde, 0x14, 0x51, 0x34,
+ 0x93, 0xa8, 0x1b, 0x7b, 0xef, 0x2e, 0x7e, 0x80, 0x10, 0x00, 0xe5, 0xc7, 0x03,
+ 0x00, 0x00, 0x01, 0x01, 0x08, 0x0a, 0xce, 0xaa, 0x00, 0x2f, 0xf2, 0xc3
+};
+
+GSO_TEST_REGISTER_DATA (gso_ipv4_tcp, static) = {
+ .name = "ipv4-tcp",
+ .description = "IPv4 TCP",
+ .data = gso_ipv4_tcp_data,
+ .data_size = sizeof (gso_ipv4_tcp_data),
+ .l4_hdr_len = sizeof (tcp_header_t),
+ .is_l2 = 1,
+ .is_ip6 = 0,
+};
+
+// ipv6
+u8 gso_ipv6_tcp_data[] = {
+ 0x02, 0xfe, 0x39, 0xe5, 0x09, 0x8f, 0x02, 0xfe, 0x2d, 0x18, 0x63, 0x18,
+ 0x08, 0x00, 0x60, 0x0d, 0xf4, 0x97, 0x00, 0x40, 0x06, 0x40, 0xfd, 0x01,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x10, 0x00, 0xfd, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x10, 0x01, 0xd8, 0xde, 0x14, 0x51, 0x34, 0x93,
+ 0xa8, 0x1b, 0x7b, 0xef, 0x2e, 0x7e, 0x80, 0x10, 0x00, 0xe5, 0xc7, 0x03,
+ 0x00, 0x00, 0x01, 0x01, 0x08, 0x0a, 0xce, 0xaa, 0x00, 0x2f, 0xf2, 0xc3
+};
+
+GSO_TEST_REGISTER_DATA (gso_ipv6_tcp, static) = {
+ .name = "ipv6-tcp",
+ .description = "IPv6 TCP",
+ .data = gso_ipv6_tcp_data,
+ .data_size = sizeof (gso_ipv6_tcp_data),
+ .l4_hdr_len = sizeof (tcp_header_t),
+ .is_l2 = 1,
+ .is_ip6 = 1,
+};
+
+static u32
+fill_buffers (vlib_main_t *vm, u32 *buffer_indices, u8 *data, u32 data_size,
+ u32 n_buffers, u32 buffer_size, u32 packet_size, u32 gso_size,
+ u32 l4_hdr_len)
+{
+ u32 i;
+
+ for (i = 0; i < n_buffers; i++)
+ {
+ u64 seed = clib_cpu_time_now ();
+ vlib_buffer_t *b = vlib_get_buffer (vm, buffer_indices[i]);
+ u32 len = 0;
+ u32 remaining_data =
+ (packet_size > buffer_size) ? (packet_size - buffer_size) : 0;
+
+ clib_memcpy_fast (b->data, data, data_size);
+ b->current_data = 0;
+
+ for (u32 j = data_size; j < buffer_size; j += 8)
+ *(u64 *) (b->data + j) = 1 + random_u64 (&seed);
+ b->current_length = buffer_size;
+
+ if (remaining_data)
+ {
+ vlib_buffer_t *pb = b;
+ u32 n_alloc,
+ n_bufs = ((remaining_data + buffer_size - 1) / buffer_size);
+ u32 *buffers = 0;
+ u32 fill_data_size;
+ u32 k = 0;
+
+ vec_validate (buffers, n_bufs - 1);
+ n_alloc = vlib_buffer_alloc (vm, buffers, n_bufs);
+ if (n_alloc < n_bufs)
+ {
+ vlib_buffer_free (vm, buffers, n_alloc);
+ vlib_cli_output (
+ vm, "vlib buffer alloc failed at %u requested %u actual %u", i,
+ n_bufs, n_alloc);
+ return i;
+ }
+
+ do
+ {
+ pb->next_buffer = buffers[k];
+ pb->flags |= VLIB_BUFFER_NEXT_PRESENT;
+ pb = vlib_get_buffer (vm, buffers[k]);
+ pb->current_data = 0;
+ fill_data_size = clib_min (buffer_size, remaining_data);
+ remaining_data -= fill_data_size;
+ for (u32 l = 0; l < fill_data_size; l += 8)
+ *(u64 *) (pb->data + l) = 1 + random_u64 (&seed);
+ pb->current_length = fill_data_size;
+ k++;
+ len += fill_data_size;
+ }
+ while (k < n_bufs);
+ b->flags |= VNET_BUFFER_F_GSO;
+ vnet_buffer2 (b)->gso_size = gso_size;
+ vnet_buffer2 (b)->gso_l4_hdr_sz = l4_hdr_len;
+ }
+ b->total_length_not_including_first_buffer = len;
+ b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
+ }
+ return i;
+}
+
+static_always_inline u32
+gso_segment_buffer_test (vlib_main_t *vm, u32 bi,
+ vnet_interface_per_thread_data_t *ptd, u8 is_l2,
+ u8 is_ip6)
+{
+ vlib_buffer_t *b = vlib_get_buffer (vm, bi);
+ generic_header_offset_t gho = { 0 };
+ u32 n_bytes_b = vlib_buffer_length_in_chain (vm, b);
+ u32 n_tx_bytes = 0;
+
+ if (PREDICT_TRUE (b->flags & VNET_BUFFER_F_GSO))
+ {
+ vnet_generic_header_offset_parser (b, &gho, is_l2, !is_ip6, is_ip6);
+ n_tx_bytes =
+ gso_segment_buffer (vm, ptd, bi, b, &gho, n_bytes_b, is_l2, is_ip6);
+ }
+
+ return n_tx_bytes;
+}
+
+static clib_error_t *
+test_gso_perf (vlib_main_t *vm, gso_test_main_t *gtm)
+{
+ clib_error_t *err = 0;
+ vnet_interface_per_thread_data_t *ptd = 0;
+ u32 packet_size = MAX_GSO_PACKET_SIZE;
+ u32 buffer_size = vlib_buffer_get_default_data_size (vm);
+ u32 gso_size;
+ u32 n_buffers, warmup_rounds, rounds;
+ u32 *buffer_indices = 0;
+ u64 t0, t1, t2[10] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+ gso_test_data_t *gso_test_data = gtm->gso_test_data;
+ int i, j, k;
+
+ if (gtm->buffer_size > buffer_size)
+ return clib_error_return (0, "buffer size must be <= %u", buffer_size);
+
+ if (gtm->packet_size > packet_size)
+ return clib_error_return (0, "gso packet size must be <= %u", packet_size);
+
+ if ((gtm->gso_size > MAX_GSO_SEGMENT_SIZE) ||
+ (gtm->gso_size < MIN_GSO_SEGMENT_SIZE))
+ return clib_error_return (
+ 0, "gso segment size must be in between %u >= and <= %u",
+ MIN_GSO_SEGMENT_SIZE, MAX_GSO_SEGMENT_SIZE);
+
+ rounds = gtm->rounds ? gtm->rounds : 256;
+ n_buffers = gtm->n_buffers ? gtm->n_buffers : 256;
+ warmup_rounds = gtm->warmup_rounds ? gtm->warmup_rounds : 256;
+ buffer_size = gtm->buffer_size ? gtm->buffer_size : buffer_size;
+ gso_size = gtm->gso_size;
+ packet_size = gtm->packet_size ? gtm->packet_size : packet_size;
+
+ vec_validate_aligned (ptd, n_buffers - 1, CLIB_CACHE_LINE_BYTES);
+ vec_validate_aligned (buffer_indices, n_buffers - 1, CLIB_CACHE_LINE_BYTES);
+
+ vlib_cli_output (vm,
+ "GSO Segmentation: packet-size %u gso-size %u buffer-size "
+ "%u n_buffers %u rounds %u "
+ "warmup-rounds %u",
+ packet_size, gso_size, buffer_size, n_buffers, rounds,
+ warmup_rounds);
+ vlib_cli_output (vm, " cpu-freq %.2f GHz",
+ (f64) vm->clib_time.clocks_per_second * 1e-9);
+
+ while (gso_test_data)
+ {
+ u32 n_filled = 0;
+ u32 n_alloc = vlib_buffer_alloc (vm, buffer_indices, n_buffers);
+ if (n_alloc != n_buffers)
+ {
+ vlib_cli_output (vm, " Test: %s FAILED", gso_test_data->description);
+ err = clib_error_return (0, "buffer alloc failure");
+ vlib_buffer_free (vm, buffer_indices, n_alloc);
+ goto done;
+ }
+ n_filled =
+ fill_buffers (vm, buffer_indices, gso_test_data->data,
+ gso_test_data->data_size, n_buffers, buffer_size,
+ packet_size, gso_size, gso_test_data->l4_hdr_len);
+
+ u8 is_l2 = gso_test_data->is_l2;
+ u8 is_ip6 = gso_test_data->is_ip6;
+
+ for (k = 0; k < warmup_rounds; k++)
+ {
+ for (j = 0; j < n_filled; j++)
+ gso_segment_buffer_test (vm, buffer_indices[j], &ptd[j], is_l2,
+ is_ip6);
+ for (j = 0; j < n_filled; j++)
+ {
+ vlib_buffer_free (vm, ptd[j].split_buffers,
+ vec_len (ptd[j].split_buffers));
+ vec_free (ptd[j].split_buffers);
+ }
+ }
+
+ for (i = 0; i < 10; i++)
+ {
+ for (k = 0; k < rounds; k++)
+ {
+ t0 = clib_cpu_time_now ();
+ for (j = 0; j < n_filled; j++)
+ gso_segment_buffer_test (vm, buffer_indices[j], &ptd[j], is_l2,
+ is_ip6);
+ t1 = clib_cpu_time_now ();
+ t2[i] += (t1 - t0);
+ for (j = 0; j < n_filled; j++)
+ {
+ vlib_buffer_free (vm, ptd[j].split_buffers,
+ vec_len (ptd[j].split_buffers));
+ vec_free (ptd[j].split_buffers);
+ }
+ }
+ }
+
+ vlib_cli_output (
+ vm, "===========================================================");
+ vlib_cli_output (vm, " Test: %s", gso_test_data->description);
+ vlib_cli_output (
+ vm, "===========================================================");
+ for (i = 0; i < 10; i++)
+ {
+ // ticks per packet
+ f64 tpp1 = (f64) (t2[i]) / (n_filled * rounds);
+ // ticks per Byte
+ f64 tpB1 = (f64) (t2[i]) / (n_filled * rounds * packet_size);
+ // Packets per second
+ f64 Kpps1 = vm->clib_time.clocks_per_second * 1e-3 / tpp1;
+ // Throughput Giga-bits per second
+ f64 Gbps1 = vm->clib_time.clocks_per_second * 8 * 1e-9 / tpB1;
+
+ vlib_cli_output (
+ vm, "%-2u: %.03f ticks/packet, %.02f Kpps, %.02f Gbps\n", i + 1,
+ tpp1, Kpps1, Gbps1);
+ }
+ if (n_alloc)
+ vlib_buffer_free (vm, buffer_indices, n_alloc);
+ clib_memset (t2, 0, sizeof (t2));
+ gso_test_data = gso_test_data->next;
+ }
+
+done:
+
+ vec_free (ptd);
+ vec_free (buffer_indices);
+ return err;
+}
+
+static clib_error_t *
+test_gso_command_fn (vlib_main_t *vm, unformat_input_t *input,
+ vlib_cli_command_t *cmd)
+{
+ gso_test_main_t *gtm = &gso_test_main;
+ clib_error_t *err = 0;
+ f64 end, start, total_time;
+
+ gtm->gso_size = DEFAULT_GSO_SEGMENT_SIZE;
+ gtm->warmup_rounds = 0;
+ gtm->rounds = 0;
+ gtm->n_buffers = 0;
+ gtm->buffer_size = 0;
+ gtm->packet_size = 0;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "verbose"))
+ gtm->verbose = 1;
+ else if (unformat (input, "detail"))
+ gtm->verbose = 2;
+ else if (unformat (input, "buffers %u", >m->n_buffers))
+ ;
+ else if (unformat (input, "buffer-size %u", >m->buffer_size))
+ ;
+ else if (unformat (input, "packet-size %u", >m->packet_size))
+ ;
+ else if (unformat (input, "gso-size %u", >m->gso_size))
+ ;
+ else if (unformat (input, "rounds %u", >m->rounds))
+ ;
+ else if (unformat (input, "warmup-rounds %u", >m->warmup_rounds))
+ ;
+ else
+ {
+ return clib_error_return (0, "unknown input '%U'",
+ format_unformat_error, input);
+ }
+ }
+
+ start = clib_cpu_time_now ();
+ err = test_gso_perf (vm, gtm);
+ end = clib_cpu_time_now ();
+
+ total_time = (f64) (end - start) / vm->clib_time.clocks_per_second;
+ vlib_cli_output (vm, "Total Time Test Took %.02f seconds", total_time);
+
+ return err;
+}
+
+VLIB_CLI_COMMAND (test_gso_command, static) = {
+ .path = "test gso",
+ .short_help = "test gso [buffers <n>] [buffer-size <size>] [packet-size "
+ "<size>] [gso-size <size>] [rounds <n>] "
+ "[warmup-rounds <n>]",
+ .function = test_gso_command_fn,
+};
+
+static clib_error_t *
+gso_test_init (vlib_main_t *vm)
+{
+ return (0);
+}
+
+VLIB_INIT_FUNCTION (gso_test_init);
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