blob: b31f2b5822d069bcbbc78ec193fb38d8bcb19919 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
/*
* Copyright (c) 2016 Intel Corporation.
* 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.
*/
#include <rte_errno.h>
#include "tcp_stream.h"
#include "tcp_rxq.h"
#define OFO_FRACTION 4
#define OFO_DB_MAX 0x20U
#define OFODB_OBJ_MIN 8U
#define OFODB_OBJ_MAX 0x20U
#define OFO_OBJ_MAX (OFODB_OBJ_MAX * OFO_DB_MAX)
void
calc_ofo_elems(uint32_t nbufs, uint32_t *nobj, uint32_t *ndb)
{
uint32_t n, nd, no;
n = nbufs / OFO_FRACTION;
n = RTE_MAX(n, OFODB_OBJ_MIN);
n = RTE_MIN(n, OFO_OBJ_MAX);
no = OFODB_OBJ_MIN / 2;
do {
no *= 2;
nd = n / no;
} while (nd > OFO_DB_MAX);
*nobj = no;
*ndb = nd;
}
|
