xnu-3247.1.106.tar.gz

[apple/xnu.git] / bsd / net / net_perf.c

diff --git a/bsd/net/net_perf.c b/bsd/net/net_perf.c
new file mode 100644 (file)
index 0000000..b475644
--- /dev/null
+++ b/bsd/net/net_perf.c
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2015 Apple Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ * 
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+#include <net/if_var.h>
+#include <net/net_perf.h>
+#include <netinet/in_var.h>
+#include <sys/sysctl.h>
+
+static void ip_perf_record_stats(net_perf_t *npp, struct timeval *tv1,
+       struct timeval *tv2, uint64_t num_pkts);
+static void update_bins(net_perf_t *npp, uint64_t bins);
+
+void net_perf_start_time(net_perf_t *npp, struct timeval *tv)
+{
+#pragma unused(npp)
+       microtime(tv);
+}
+
+void net_perf_measure_time(net_perf_t *npp, struct timeval *start, uint64_t num_pkts)
+{
+       struct timeval stop;
+       microtime(&stop);
+       ip_perf_record_stats(npp, start, &stop, num_pkts);
+}
+
+static void
+ip_perf_record_stats(net_perf_t *npp, struct timeval *tv1, struct timeval *tv2, uint64_t num_pkts)
+{
+       struct timeval tv_diff;
+       uint64_t usecs;
+       timersub(tv2, tv1, &tv_diff);
+       usecs = tv_diff.tv_sec * 1000000ULL + tv_diff.tv_usec;
+       OSAddAtomic64(usecs, &npp->np_total_usecs);
+       OSAddAtomic64(num_pkts, &npp->np_total_pkts);
+}
+
+static void
+update_bins(net_perf_t *npp, uint64_t bins)
+{
+       bzero(&npp->np_hist_bars, sizeof(npp->np_hist_bars));
+
+       for (int i = 1, j = 0; i <= 64 && j < NET_PERF_BARS; i++) {
+               if (bins & 0x1) {
+                       npp->np_hist_bars[j] = i;
+                       j++;
+               }
+               bins >>= 1;
+       }
+}
+
+void
+net_perf_initialize(net_perf_t *npp, uint64_t bins)
+{
+       bzero(npp, sizeof(net_perf_t));
+       /* initialize np_hist_bars array */
+       update_bins(npp, bins);
+}
+
+void
+net_perf_histogram(net_perf_t *npp, uint64_t num_pkts)
+{
+       if (num_pkts <= npp->np_hist_bars[0]) {
+               OSAddAtomic64(num_pkts, &npp->np_hist1);
+       } else if (npp->np_hist_bars[0] < num_pkts && num_pkts <= npp->np_hist_bars[1]) {
+               OSAddAtomic64(num_pkts, &npp->np_hist2);
+       } else if (npp->np_hist_bars[1] < num_pkts && num_pkts <= npp->np_hist_bars[2]) {
+               OSAddAtomic64(num_pkts, &npp->np_hist3);
+       } else if (npp->np_hist_bars[2] < num_pkts && num_pkts <= npp->np_hist_bars[3]) {
+               OSAddAtomic64(num_pkts, &npp->np_hist4);
+       } else if (npp->np_hist_bars[3] < num_pkts) {
+               OSAddAtomic64(num_pkts, &npp->np_hist5);
+       }
+}
+
+boolean_t
+net_perf_validate_bins(uint64_t bins)
+{
+       return (NET_PERF_BARS == __builtin_popcountll(bins));
+}
+