c3148b1be8
Type: refactor Change-Id: I5235bf3e9aff58af6ba2c14e8c6529c4fc9ec86c Signed-off-by: Damjan Marion <damarion@cisco.com>
152 lines
3.8 KiB
C
152 lines
3.8 KiB
C
/*
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* nsim.c - skeleton vpp engine plug-in
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*
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* Copyright (c) <current-year> <your-organization>
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <vlib/vlib.h>
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#include <vnet/vnet.h>
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#include <vppinfra/error.h>
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#include <nsim/nsim.h>
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typedef struct
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{
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f64 expired;
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u32 next_index;
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} nsim_tx_trace_t;
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#ifndef CLIB_MARCH_VARIANT
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/* packet trace format function */
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static u8 *
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format_nsim_tx_trace (u8 * s, va_list * args)
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{
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CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
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CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
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nsim_tx_trace_t *t = va_arg (*args, nsim_tx_trace_t *);
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s = format (s, "NSIM: tx at %.6f next_index %d", t->expired, t->next_index);
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return s;
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}
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#endif /* CLIB_MARCH_VARIANT */
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#define foreach_nsim_tx_error \
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_(TRANSMITTED, "Packets transmitted")
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typedef enum
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{
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#define _(sym,str) NSIM_TX_ERROR_##sym,
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foreach_nsim_tx_error
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#undef _
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NSIM_TX_N_ERROR,
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} nsim_tx_error_t;
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#ifndef CLIB_MARCH_VARIANT
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static char *nsim_tx_error_strings[] = {
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#define _(sym,string) string,
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foreach_nsim_tx_error
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#undef _
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};
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#endif /* CLIB_MARCH_VARIANT */
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typedef enum
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{
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NSIM_NEXT_DROP,
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NSIM_N_NEXT,
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} nsim_next_t;
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always_inline uword
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nsim_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
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vlib_frame_t * f, int is_trace)
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{
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nsim_main_t *nsm = &nsim_main;
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nsim_wheel_t *wp = nsm->wheel_by_thread[vm->thread_index];
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nsim_wheel_entry_t *ep;
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f64 now;
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/* Nothing on the scheduler wheel? */
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if (wp->cursize == 0)
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return 0;
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/* First entry on the wheel isn't expired? */
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ep = wp->entries + wp->head;
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now = vlib_time_now (vm);
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if (ep->tx_time > now)
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return 0;
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u32 n_burst = clib_min (wp->cursize, NSIM_MAX_TX_BURST), n_tx_packets = 0;
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u32 froms[NSIM_MAX_TX_BURST], *from;
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u16 nexts[NSIM_MAX_TX_BURST], *next;
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from = froms;
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next = nexts;
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while (n_tx_packets < n_burst && ep->tx_time <= now)
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{
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/* prefetch one line / 2 entries ahead */
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if ((((uword) ep) & (CLIB_CACHE_LINE_BYTES - 1)) == 0)
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clib_prefetch_load ((ep + 2));
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ep = wp->entries + wp->head;
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from[0] = ep->buffer_index;
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next[0] = ep->output_next_index;
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wp->head++;
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if (wp->head == wp->wheel_size)
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wp->head = 0;
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from += 1;
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next += 1;
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n_tx_packets++;
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}
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wp->cursize -= n_tx_packets;
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vlib_buffer_enqueue_to_next (vm, node, froms, nexts, n_tx_packets);
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vlib_node_increment_counter (vm, node->node_index,
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NSIM_TX_ERROR_TRANSMITTED, n_tx_packets);
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return n_tx_packets;
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}
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VLIB_NODE_FN (nsim_input_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
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vlib_frame_t * frame)
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{
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if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE))
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return nsim_input_inline (vm, node, frame, 1 /* is_trace */ );
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else
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return nsim_input_inline (vm, node, frame, 0 /* is_trace */ );
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}
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#ifndef CLIB_MARCH_VARIANT
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VLIB_REGISTER_NODE (nsim_input_node) =
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{
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.type = VLIB_NODE_TYPE_INPUT,
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.name = "nsim-wheel",
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/* Will be enabled if/when the feature is configured */
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.state = VLIB_NODE_STATE_DISABLED,
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.format_trace = format_nsim_tx_trace,
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.n_errors = NSIM_TX_N_ERROR,
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.error_strings = nsim_tx_error_strings,
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};
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#endif /* CLIB_MARCH_VARIANT */
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/*
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* fd.io coding-style-patch-verification: ON
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*
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* Local Variables:
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* eval: (c-set-style "gnu")
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* End:
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*/
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