mirror of https://github.com/BOINC/boinc.git
108 lines
2.9 KiB
C
108 lines
2.9 KiB
C
// The contents of this file are subject to the Mozilla Public License
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// Version 1.0 (the "License"); you may not use this file except in
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// compliance with the License. You may obtain a copy of the License at
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// http://www.mozilla.org/MPL/
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//
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// Software distributed under the License is distributed on an "AS IS"
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// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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// License for the specific language governing rights and limitations
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// under the License.
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//
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// The Original Code is the Berkeley Open Infrastructure for Network Computing.
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//
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// The Initial Developer of the Original Code is the SETI@home project.
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// Portions created by the SETI@home project are Copyright (C) 2002
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// University of California at Berkeley. All Rights Reserved.
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//
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// Contributor(s):
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//
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#include <string.h>
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#include "math.h"
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#include "parse.h"
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#include "time.h"
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#include "error_numbers.h"
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#include "net_stats.h"
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// Is this a reasonable cutoff?
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#define SMALL_FILE_CUTOFF 32000
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NET_STATS::NET_STATS() {
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last_update_up = 0;
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last_update_down = 0;
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bwup = 0;
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bwdown = 0;
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}
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// Update network statistics
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void NET_STATS::update(bool is_upload, double nbytes, double nsecs) {
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double w1, w2, bw;
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// ignore small files since their transfer times don't
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// reflect steady-state behavior
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if (nbytes < SMALL_FILE_CUTOFF) return;
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// The weight of the new item is a function of its size
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w1 = 1 - exp(-nbytes/1.e7);
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w2 = 1 - w1;
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bw = nbytes/nsecs;
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if (is_upload) {
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if (!last_update_up) {
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bwup = bw;
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} else {
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bwup = w1*bw + w2*bwup;
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}
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last_update_up = time(0);
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} else {
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if (!last_update_down) {
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bwdown = bw;
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} else {
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bwdown = w1*bw + w2*bwdown;
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}
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last_update_down = time(0);
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}
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}
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// Write XML based network statistics
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//
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int NET_STATS::write(FILE* out, bool to_server) {
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fprintf(out,
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"<net_stats>\n"
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" <bwup>%f</bwup>\n"
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" <bwdown>%f</bwdown>\n",
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bwup,
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bwdown
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);
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if (!to_server) {
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fprintf(out,
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" <last_update_up>%d</last_update_up>\n"
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" <last_update_down>%d</last_update_down>\n",
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last_update_up, last_update_down
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);
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}
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fprintf(out, "</net_stats>\n");
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return 0;
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}
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// Read XML based network statistics
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//
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int NET_STATS::parse(FILE* in) {
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char buf[256];
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memset(this, 0, sizeof(NET_STATS));
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while (fgets(buf, 256, in)) {
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if (match_tag(buf, "</net_stats>")) return 0;
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else if (parse_double(buf, "<bwup>", bwup)) continue;
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else if (parse_double(buf, "<bwdown>", bwdown)) continue;
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else if (parse_int(buf, "<last_update_up>", last_update_up)) continue;
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else if (parse_int(buf, "<last_update_down>", last_update_down)) continue;
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else fprintf(stderr, "NET_STATS::parse(): unrecognized: %s\n", buf);
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}
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return 1;
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}
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