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path: root/test/test_qos.py
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2019-11-05misc: Fix python scripts shebang lineRenato Botelho do Couto1-1/+1
2019-08-06ethernet: change to mark the CFI bit in the L2 header.Prashant Maheshwari1-4/+17
2019-07-31qos: Store functionNeale Ranns1-2/+28
2019-07-24qos: QoS dump APIsNeale Ranns1-124/+58
2019-06-18fib: fib api updatesNeale Ranns1-7/+3
2019-05-17Tests: Refactor. Remove copies of enums.Paul Vinciguerra1-35/+46
2019-05-16tests: refactor. Replace literal constant w/ named constant.Paul Vinciguerra1-34/+36
2019-04-10Tests Cleanup: Fix missing calls to setUpClass/tearDownClass.Paul Vinciguerra1-0/+8
2019-03-28Typos. A bunch of typos I've been collecting.Paul Vinciguerra1-2/+2
2019-03-11VPP-1508: Use scapy.compat to manage packet level library differences.Paul Vinciguerra1-30/+31
2018-11-15QoS: fix always recoding as IPNeale Ranns1-13/+23
2018-09-11GBP Endpoint UpdatesNeale Ranns1-1/+2
2018-07-20QoS: marking and recording for MPLS and VLANNeale Ranns1-4/+210
2018-06-24Revert "Revert "make test: fix broken interfaces""Klement Sekera1-6/+2
2018-06-22Revert "make test: fix broken interfaces"Ole Troan1-2/+6
2018-06-22make test: fix broken interfacesKlement Sekera1-6/+2
2018-03-16QoS recording and markingNeale Ranns1-0/+366
a id='n348' href='#n348'>348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 
/*
 * Copyright (c) 2016 Cisco and/or its affiliates.
 * 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.
 */
#ifndef __included_ssvm_fifo_h__
#define __included_ssvm_fifo_h__

#include <vppinfra/clib.h>
#include <vppinfra/vec.h>
#include <vppinfra/mheap.h>
#include <vppinfra/heap.h>
#include <vppinfra/pool.h>
#include <vppinfra/format.h>
#include <pthread.h>

/** Out-of-order segment */
typedef struct
{
  u32 next;	/**< Next linked-list element pool index */
  u32 prev;	/**< Previous linked-list element pool index */

  u32 start;	/**< Start of segment, normalized*/
  u32 length;	/**< Length of segment */
} ooo_segment_t;

format_function_t format_ooo_segment;
format_function_t format_ooo_list;

#define SVM_FIFO_TRACE 			(0)
#define OOO_SEGMENT_INVALID_INDEX 	((u32)~0)
#define SVM_FIFO_INVALID_SESSION_INDEX 	((u32)~0)
#define SVM_FIFO_INVALID_INDEX		((u32)~0)
#define SVM_FIFO_MAX_EVT_SUBSCRIBERS	8

enum
{
  SVM_FIFO_NO_TX_NOTIF = 0,
  SVM_FIFO_WANT_TX_NOTIF = 1,
  SVM_FIFO_WANT_TX_NOTIF_IF_FULL = 2,
};

typedef struct
{
  u32 offset;
  u32 len;
  u32 action;
} svm_fifo_trace_elem_t;

typedef struct _svm_fifo
{
  CLIB_CACHE_LINE_ALIGN_MARK (shared_first);
  volatile u32 cursize;		/**< current fifo size */
  u32 nitems;

    CLIB_CACHE_LINE_ALIGN_MARK (shared_second);
  volatile u32 has_event;	/**< non-zero if deq event exists */

  u32 master_session_index;
  u32 client_session_index;
  u8 master_thread_index;
  u8 client_thread_index;
  u32 segment_manager;
  u32 segment_index;
  u32 ct_session_index;		/**< Local session index for vpp */
  u32 freelist_index;		/**< aka log2(allocated_size) - const. */
  i8 refcnt;			/**< reference count  */

    CLIB_CACHE_LINE_ALIGN_MARK (consumer);
  u32 head;
  volatile u32 want_tx_ntf;	/**< producer wants nudge */
  volatile u32 has_tx_ntf;

    CLIB_CACHE_LINE_ALIGN_MARK (producer);
  u32 tail;

  ooo_segment_t *ooo_segments;	/**< Pool of ooo segments */
  u32 ooos_list_head;		/**< Head of out-of-order linked-list */
  u32 ooos_newest;		/**< Last segment to have been updated */
  struct _svm_fifo *next;	/**< next in freelist/active chain */
  struct _svm_fifo *prev;	/**< prev in active chain */
  volatile u8 n_subscribers;
  u8 subscribers[SVM_FIFO_MAX_EVT_SUBSCRIBERS];

#if SVM_FIFO_TRACE
  svm_fifo_trace_elem_t *trace;
#endif

    CLIB_CACHE_LINE_ALIGN_MARK (data);
} svm_fifo_t;

typedef enum
{
  SVM_FIFO_FULL = -2,
} svm_fifo_err_t;

typedef struct svm_fifo_segment_
{
  u8 *data;
  u32 len;
} svm_fifo_segment_t;

#if SVM_FIFO_TRACE
#define svm_fifo_trace_add(_f, _s, _l, _t)		\
{							\
  svm_fifo_trace_elem_t *trace_elt;			\
  vec_add2(_f->trace, trace_elt, 1);			\
  trace_elt->offset = _s;				\
  trace_elt->len = _l;					\
  trace_elt->action = _t;				\
}
#else
#define svm_fifo_trace_add(_f, _s, _l, _t)
#endif

u8 *svm_fifo_dump_trace (u8 * s, svm_fifo_t * f);
u8 *svm_fifo_replay (u8 * s, svm_fifo_t * f, u8 no_read, u8 verbose);

static inline u32
svm_fifo_max_dequeue (svm_fifo_t * f)
{
  return clib_atomic_load_acq_n (&f->cursize);
}

static inline int
svm_fifo_is_full (svm_fifo_t * f)
{
  return (clib_atomic_load_acq_n (&f->cursize) == f->nitems);
}

static inline int
svm_fifo_is_empty (svm_fifo_t * f)
{
  return (clib_atomic_load_acq_n (&f->cursize) == 0);
}

static inline u32
svm_fifo_max_enqueue (svm_fifo_t * f)
{
  return f->nitems - svm_fifo_max_dequeue (f);
}

static inline int
svm_fifo_has_event (svm_fifo_t * f)
{
  return f->has_event;
}

static inline u8
svm_fifo_has_ooo_data (svm_fifo_t * f)
{
  return f->ooos_list_head != OOO_SEGMENT_INVALID_INDEX;
}

/**
 * Sets fifo event flag.
 *
 * Also acts as a release barrier.
 *
 * @return 1 if flag was not set.
 */
always_inline u8
svm_fifo_set_event (svm_fifo_t * f)
{
  /* return __sync_lock_test_and_set (&f->has_event, 1) == 0;
     return __sync_bool_compare_and_swap (&f->has_event, 0, 1); */
  return !__atomic_exchange_n (&f->has_event, 1, __ATOMIC_RELEASE);
}

/**
 * Unsets fifo event flag.
 *
 * Also acts as a release barrier.
 */
always_inline void
svm_fifo_unset_event (svm_fifo_t * f)
{
  clib_atomic_release (&f->has_event);
}

svm_fifo_t *svm_fifo_create (u32 data_size_in_bytes);
void svm_fifo_free (svm_fifo_t * f);

int svm_fifo_enqueue_nowait (svm_fifo_t * f, u32 max_bytes,
			     const u8 * copy_from_here);
int svm_fifo_enqueue_with_offset (svm_fifo_t * f, u32 offset,
				  u32 required_bytes, u8 * copy_from_here);
int svm_fifo_dequeue_nowait (svm_fifo_t * f, u32 max_bytes, u8 * copy_here);

int svm_fifo_peek (svm_fifo_t * f, u32 offset, u32 max_bytes, u8 * copy_here);
int svm_fifo_dequeue_drop (svm_fifo_t * f, u32 max_bytes);
void svm_fifo_dequeue_drop_all (svm_fifo_t * f);
int svm_fifo_segments (svm_fifo_t * f, svm_fifo_segment_t * fs);
void svm_fifo_segments_free (svm_fifo_t * f, svm_fifo_segment_t * fs);
void svm_fifo_init_pointers (svm_fifo_t * f, u32 pointer);
void svm_fifo_overwrite_head (svm_fifo_t * f, u8 * data, u32 len);
void svm_fifo_add_subscriber (svm_fifo_t * f, u8 subscriber);
void svm_fifo_del_subscriber (svm_fifo_t * f, u8 subscriber);
format_function_t format_svm_fifo;

/**
 * Max contiguous chunk of data that can be read
 */
always_inline u32
svm_fifo_max_read_chunk (svm_fifo_t * f)
{
  return ((f->tail > f->head) ? (f->tail - f->head) : (f->nitems - f->head));
}

/**
 * Max contiguous chunk of data that can be written
 */
always_inline u32
svm_fifo_max_write_chunk (svm_fifo_t * f)
{
  return ((f->tail >= f->head) ? (f->nitems - f->tail) : (f->head - f->tail));
}

/**
 * Advance tail pointer
 *
 * Useful for moving tail pointer after external enqueue.
 */
always_inline void
svm_fifo_enqueue_nocopy (svm_fifo_t * f, u32 bytes)
{
  ASSERT (bytes <= svm_fifo_max_enqueue (f));
  f->tail = (f->tail + bytes) % f->nitems;
  f->cursize += bytes;
}

always_inline u8 *
svm_fifo_head (svm_fifo_t * f)
{
  return (f->data + f->head);
}

always_inline u8 *
svm_fifo_tail (svm_fifo_t * f)
{
  return (f->data + f->tail);
}

always_inline u32
svm_fifo_nitems (svm_fifo_t * f)
{
  return f->nitems;
}

static inline void
svm_fifo_add_want_tx_ntf (svm_fifo_t * f, u8 ntf_type)
{
  f->want_tx_ntf |= ntf_type;
}

static inline void
svm_fifo_del_want_tx_ntf (svm_fifo_t * f, u8 ntf_type)
{
  f->want_tx_ntf &= ~ntf_type;
}

static inline void
svm_fifo_clear_tx_ntf (svm_fifo_t * f)
{
  /* Set the flag if want_tx_notif_if_full was the only ntf requested */
  f->has_tx_ntf = f->want_tx_ntf == SVM_FIFO_WANT_TX_NOTIF_IF_FULL;
  svm_fifo_del_want_tx_ntf (f, SVM_FIFO_WANT_TX_NOTIF);
}

static inline void
svm_fifo_reset_tx_ntf (svm_fifo_t * f)
{
  f->has_tx_ntf = 0;
}

static inline u8
svm_fifo_needs_tx_ntf (svm_fifo_t * f, u32 n_last_deq)
{
  u8 want_ntf = f->want_tx_ntf;

  if (PREDICT_TRUE (want_ntf == SVM_FIFO_NO_TX_NOTIF))
    return 0;
  else if (want_ntf & SVM_FIFO_WANT_TX_NOTIF)
    return 1;
  else if (want_ntf & SVM_FIFO_WANT_TX_NOTIF_IF_FULL)
    {
      u32 max_deq = svm_fifo_max_dequeue (f);
      u32 nitems = svm_fifo_nitems (f);
      if (!f->has_tx_ntf && max_deq < nitems
	  && max_deq + n_last_deq >= nitems)
	return 1;

      return 0;
    }
  return 0;
}

always_inline u8
svm_fifo_n_subscribers (svm_fifo_t * f)
{
  return f->n_subscribers;
}

u32 svm_fifo_number_ooo_segments (svm_fifo_t * f);
ooo_segment_t *svm_fifo_first_ooo_segment (svm_fifo_t * f);

always_inline ooo_segment_t *
svm_fifo_newest_ooo_segment (svm_fifo_t * f)
{
  if (f->ooos_newest == OOO_SEGMENT_INVALID_INDEX)
    return 0;
  return pool_elt_at_index (f->ooo_segments, f->ooos_newest);
}

always_inline void
svm_fifo_newest_ooo_segment_reset (svm_fifo_t * f)
{
  f->ooos_newest = OOO_SEGMENT_INVALID_INDEX;
}

always_inline u32
ooo_segment_distance_from_tail (svm_fifo_t * f, u32 pos)
{
  /* Ambiguous. Assumption is that ooo segments don't touch tail */
  if (PREDICT_FALSE (pos == f->tail && f->tail == f->head))
    return f->nitems;

  return (((f->nitems + pos) - f->tail) % f->nitems);
}

always_inline u32
ooo_segment_distance_to_tail (svm_fifo_t * f, u32 pos)
{
  return (((f->nitems + f->tail) - pos) % f->nitems);
}

always_inline u32
ooo_segment_offset (svm_fifo_t * f, ooo_segment_t * s)
{
  return ooo_segment_distance_from_tail (f, s->start);
}

always_inline u32
ooo_segment_end_offset (svm_fifo_t * f, ooo_segment_t * s)
{
  return ooo_segment_distance_from_tail (f, s->start) + s->length;
}

always_inline u32
ooo_segment_length (svm_fifo_t * f, ooo_segment_t * s)
{
  return s->length;
}

always_inline ooo_segment_t *
ooo_segment_get_prev (svm_fifo_t * f, ooo_segment_t * s)
{
  if (s->prev == OOO_SEGMENT_INVALID_INDEX)
    return 0;
  return pool_elt_at_index (f->ooo_segments, s->prev);
}

always_inline ooo_segment_t *
ooo_segment_next (svm_fifo_t * f, ooo_segment_t * s)
{
  if (s->next == OOO_SEGMENT_INVALID_INDEX)
    return 0;
  return pool_elt_at_index (f->ooo_segments, s->next);
}

#endif /* __included_ssvm_fifo_h__ */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */