mirror of https://github.com/BOINC/boinc.git
131 lines
3.4 KiB
C
131 lines
3.4 KiB
C
// The contents of this file are subject to the BOINC 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://boinc.berkeley.edu/license_1.0.txt
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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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// NET_STATS estimates average network throughput,
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// i.e. the average total throughput in both the up and down directions.
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// Here's how it works: NET_STATS::poll() is called every second or so.
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// If there are any file transfers active,
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// it increments elapsed time and byte counts,
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// and maintains an exponential average of throughput.
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#include "cpp.h"
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#ifdef _WIN32
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#include "stdafx.h"
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#endif
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#ifndef _WIN32
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#include <string.h>
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#include <math.h>
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#endif
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#include "parse.h"
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#include "time.h"
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#include "util.h"
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#include "error_numbers.h"
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#include "client_msgs.h"
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#include "net_stats.h"
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#define EXP_DECAY_RATE (1./SECONDS_PER_DAY)
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NET_STATS::NET_STATS() {
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last_time = 0;
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memset(&up, 0, sizeof(up));
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memset(&down, 0, sizeof(down));
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}
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void NET_INFO::update(double dt, double nb, bool active) {
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if (active) {
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delta_t += dt;
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delta_nbytes += nb-last_bytes;
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}
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last_bytes = nb;
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}
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double NET_INFO::throughput() {
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double x, tp;
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if (starting_throughput > 0) {
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if (delta_t > 0) {
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x = exp(delta_t*EXP_DECAY_RATE);
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tp = delta_nbytes/delta_t;
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return x*starting_throughput + (1-x)*tp;
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} else {
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return starting_throughput;
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}
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} else if (delta_t > 0) {
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return delta_nbytes/delta_t;
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}
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return 0;
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}
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void NET_STATS::poll(NET_XFER_SET& nxs) {
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double t, dt;
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bool upload_active, download_active;
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t = dtime();
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if (last_time == 0) {
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dt = 0;
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} else {
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dt = t - last_time;
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}
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last_time = t;
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nxs.check_active(upload_active, download_active);
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up.update(dt, nxs.bytes_up, upload_active);
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down.update(dt, nxs.bytes_down, download_active);
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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(MIOFILE& out, bool to_server) {
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out.printf(
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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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"</net_stats>\n",
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up.throughput(),
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down.throughput()
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);
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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(MIOFILE& in) {
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char buf[256];
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double bwup, bwdown;
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memset(this, 0, sizeof(NET_STATS));
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while (in.fgets(buf, 256)) {
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if (match_tag(buf, "</net_stats>")) return 0;
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else if (parse_double(buf, "<bwup>", bwup)) {
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up.starting_throughput = bwup;
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continue;
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}
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else if (parse_double(buf, "<bwdown>", bwdown)) {
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down.starting_throughput = bwdown;
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continue;
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}
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else msg_printf(NULL, MSG_ERROR, "NET_STATS::parse(): unrecognized: %s\n", buf);
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}
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return ERR_XML_PARSE;
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}
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