1 | /* |
2 | * Copyright (c) 2015 Apple Inc. All rights reserved. |
3 | * |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
5 | * |
6 | * This file contains Original Code and/or Modifications of Original Code |
7 | * as defined in and that are subject to the Apple Public Source License |
8 | * Version 2.0 (the 'License'). You may not use this file except in |
9 | * compliance with the License. The rights granted to you under the License |
10 | * may not be used to create, or enable the creation or redistribution of, |
11 | * unlawful or unlicensed copies of an Apple operating system, or to |
12 | * circumvent, violate, or enable the circumvention or violation of, any |
13 | * terms of an Apple operating system software license agreement. |
14 | * |
15 | * Please obtain a copy of the License at |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
17 | * |
18 | * The Original Code and all software distributed under the License are |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
23 | * Please see the License for the specific language governing rights and |
24 | * limitations under the License. |
25 | * |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
27 | */ |
28 | #include <net/if_var.h> |
29 | #include <net/net_perf.h> |
30 | #include <netinet/in_var.h> |
31 | #include <sys/sysctl.h> |
32 | |
33 | static void ip_perf_record_stats(net_perf_t *npp, struct timeval *tv1, |
34 | struct timeval *tv2, uint64_t num_pkts); |
35 | static void update_bins(net_perf_t *npp, uint64_t bins); |
36 | |
37 | void |
38 | net_perf_start_time(net_perf_t *npp, struct timeval *tv) |
39 | { |
40 | #pragma unused(npp) |
41 | microtime(tv); |
42 | } |
43 | |
44 | void |
45 | net_perf_measure_time(net_perf_t *npp, struct timeval *start, uint64_t num_pkts) |
46 | { |
47 | struct timeval stop; |
48 | microtime(tv: &stop); |
49 | ip_perf_record_stats(npp, tv1: start, tv2: &stop, num_pkts); |
50 | } |
51 | |
52 | static void |
53 | ip_perf_record_stats(net_perf_t *npp, struct timeval *tv1, struct timeval *tv2, uint64_t num_pkts) |
54 | { |
55 | struct timeval tv_diff; |
56 | uint64_t usecs; |
57 | timersub(tv2, tv1, &tv_diff); |
58 | usecs = tv_diff.tv_sec * 1000000ULL + tv_diff.tv_usec; |
59 | OSAddAtomic64(usecs, &npp->np_total_usecs); |
60 | OSAddAtomic64(num_pkts, &npp->np_total_pkts); |
61 | } |
62 | |
63 | static void |
64 | update_bins(net_perf_t *npp, uint64_t bins) |
65 | { |
66 | bzero(s: &npp->np_hist_bars, n: sizeof(npp->np_hist_bars)); |
67 | |
68 | for (uint8_t i = 1, j = 0; i <= 64 && j < NET_PERF_BARS; i++) { |
69 | if (bins & 0x1) { |
70 | npp->np_hist_bars[j] = i; |
71 | j++; |
72 | } |
73 | bins >>= 1; |
74 | } |
75 | } |
76 | |
77 | void |
78 | net_perf_initialize(net_perf_t *npp, uint64_t bins) |
79 | { |
80 | bzero(s: npp, n: sizeof(net_perf_t)); |
81 | /* initialize np_hist_bars array */ |
82 | update_bins(npp, bins); |
83 | } |
84 | |
85 | void |
86 | net_perf_histogram(net_perf_t *npp, uint64_t num_pkts) |
87 | { |
88 | if (num_pkts <= npp->np_hist_bars[0]) { |
89 | OSAddAtomic64(num_pkts, &npp->np_hist1); |
90 | } else if (npp->np_hist_bars[0] < num_pkts && num_pkts <= npp->np_hist_bars[1]) { |
91 | OSAddAtomic64(num_pkts, &npp->np_hist2); |
92 | } else if (npp->np_hist_bars[1] < num_pkts && num_pkts <= npp->np_hist_bars[2]) { |
93 | OSAddAtomic64(num_pkts, &npp->np_hist3); |
94 | } else if (npp->np_hist_bars[2] < num_pkts && num_pkts <= npp->np_hist_bars[3]) { |
95 | OSAddAtomic64(num_pkts, &npp->np_hist4); |
96 | } else if (npp->np_hist_bars[3] < num_pkts) { |
97 | OSAddAtomic64(num_pkts, &npp->np_hist5); |
98 | } |
99 | } |
100 | |
101 | boolean_t |
102 | net_perf_validate_bins(uint64_t bins) |
103 | { |
104 | return NET_PERF_BARS == __builtin_popcountll(bins); |
105 | } |
106 | |