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boinc/client/time_stats.C

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// Berkeley Open Infrastructure for Network Computing
// http://boinc.berkeley.edu
// Copyright (C) 2005 University of California
//
// This is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation;
// either version 2.1 of the License, or (at your option) any later version.
//
// This software is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU Lesser General Public License for more details.
//
// To view the GNU Lesser General Public License visit
// http://www.gnu.org/copyleft/lesser.html
// or write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#ifdef _WIN32
#include "boinc_win.h"
#endif
#ifndef _WIN32
#include "config.h"
#include <cstdio>
#include <ctime>
#include <cmath>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#include "parse.h"
#include "util.h"
#include "error_numbers.h"
#include "client_msgs.h"
#include "client_state.h"
#include "network.h"
#include "log_flags.h"
#include "time_stats.h"
// exponential decay constant.
// The last 10 days have a weight of 1/e;
// everything before that has a weight of (1-1/e)
const float ALPHA = (SECONDS_PER_DAY*10);
//const float ALPHA = 60; // for testing
bool BOINC_OUTAGE::is_recent() const {
return gstate.now - 60 * SECONDS_PER_DAY < end;
}
TIME_STATS::TIME_STATS() {
last_update = 0;
first = true;
on_frac = 1;
connected_frac = 1;
active_frac = 1;
cpu_efficiency = 1;
}
// Update time statistics based on current activities
// NOTE: we don't set the state-file dirty flag here,
// so these get written to disk only when other activities
// cause this to happen. Maybe should change this.
//
void TIME_STATS::update(bool is_active) {
double dt, w1, w2;
if (last_update == 0) {
// this is the first time this client has executed.
// Assume that everything is active
on_frac = 1;
connected_frac = 1;
active_frac = 1;
first = false;
last_update = gstate.now;
} else {
dt = gstate.now - last_update;
if (dt <= 10) return;
w1 = 1 - exp(-dt/ALPHA); // weight for recent period
w2 = 1 - w1; // weight for everything before that
// (close to zero if long gap)
// the following always returns UNKNOWN,
// but leave it here for now
//
int connected_state = get_connected_state();
if (first) {
// the client has just started; this is the first call.
//
on_frac *= w2;
first = false;
BOINC_OUTAGE outage;
outage.start = last_update;
outage.end = gstate.now;
outages.push_back(outage);
gstate.set_client_state_dirty("Outage");
} else {
on_frac = w1 + w2*on_frac;
if (connected_frac < 0) connected_frac = 0;
switch (connected_state) {
case CONNECTED_STATE_NOT_CONNECTED:
connected_frac *= w2;
break;
case CONNECTED_STATE_CONNECTED:
connected_frac *= w2;
connected_frac += w1;
break;
case CONNECTED_STATE_UNKNOWN:
connected_frac = -1;
}
active_frac *= w2;
if (is_active) {
active_frac += w1;
if (inactive_start) {
BOINC_OUTAGE outage;
outage.start = inactive_start;
outage.end = gstate.now;
outages.push_back(outage);
gstate.set_client_state_dirty("Outage");
inactive_start = 0;
}
} else if (inactive_start == 0){
inactive_start = gstate.now;
}
}
last_update = gstate.now;
if (log_flags.time_debug) {
msg_printf(0, MSG_INFO,
"[time_debug] dt %f w2 %f on %f; active %f; conn %f",
dt, w2, on_frac, active_frac, connected_frac
);
}
}
}
void TIME_STATS::update_cpu_efficiency(double cpu_wall_time, double cpu_time) {
double old_cpu_efficiency = cpu_efficiency;
if (cpu_wall_time < .01) return;
double w = exp(-cpu_wall_time/SECONDS_PER_DAY);
double e = cpu_time/cpu_wall_time;
if (e<0) {
return;
}
cpu_efficiency = w*cpu_efficiency + (1-w)*e;
if (log_flags.cpu_sched_debug){
msg_printf(0, MSG_INFO,
"[cpu_sched_debug] CPU efficiency old %f new %f wall %f CPU %f w %f e %f",
old_cpu_efficiency, cpu_efficiency, cpu_wall_time,
cpu_time, w, e
);
}
}
// Write XML based time statistics
//
int TIME_STATS::write(MIOFILE& out, bool to_server) {
out.printf(
"<time_stats>\n"
" <on_frac>%f</on_frac>\n"
" <connected_frac>%f</connected_frac>\n"
" <active_frac>%f</active_frac>\n"
" <cpu_efficiency>%f</cpu_efficiency>\n",
on_frac,
connected_frac,
active_frac,
cpu_efficiency
);
if (!to_server) {
out.printf(
" <last_update>%f</last_update>\n",
last_update
);
}
#if 0
// too much text. Maybe just send the longest outage?
//
if (outages.size()) {
out.printf(" <outages>\n");
unsigned int i;
for (i=0; i<outages.size(); i++) {
if (outages[i].is_recent()) {
out.printf(
" <outage>\n"
" <start>%f</start>\n"
" <end>%f</end>\n"
" </outage>\n",
outages[i].start,
outages[i].end
);
}
}
out.printf(" </outages>\n");
}
#endif
out.printf("</time_stats>\n");
return 0;
}
// Parse XML based time statistics, usually from client_state.xml
//
int TIME_STATS::parse(MIOFILE& in) {
char buf[256];
while (in.fgets(buf, 256)) {
if (match_tag(buf, "</time_stats>")) return 0;
else if (parse_double(buf, "<last_update>", last_update)) continue;
else if (parse_double(buf, "<on_frac>", on_frac)) continue;
else if (parse_double(buf, "<connected_frac>", connected_frac)) continue;
else if (parse_double(buf, "<active_frac>", active_frac)) continue;
else if (parse_double(buf, "<cpu_efficiency>", cpu_efficiency)) {
if (cpu_efficiency < 0) cpu_efficiency = 1;
if (cpu_efficiency > 1) cpu_efficiency = 1;
continue;
} else if (match_tag(buf, "<outages>")){
while(in.fgets(buf, 256)) {
if (match_tag(buf, "</outages>")) break;
else if (match_tag(buf, "<outage>")) {
BOINC_OUTAGE outage;
while (in.fgets(buf, 256)) {
if (match_tag(buf, "</outage>")) {
outages.push_back(outage);
break;
}
else if (parse_double(buf, "<start>", outage.start)) continue;
else if (parse_double(buf, "<end>", outage.end)) continue;
}
}
}
} else {
if (log_flags.unparsed_xml) {
msg_printf(0, MSG_INFO,
"[unparsed_xml] TIME_STATS::parse(): unrecognized: %s\n", buf
);
}
}
}
return ERR_XML_PARSE;
}
double TIME_STATS::get_longest_boinc_outage() const {
unsigned int i;
double longest_outage = 0;
for (i=0; i<outages.size(); i++) {
if (outages[i].is_recent()) {
double outage_length = outages[i].end - outages[i].start;
if (outage_length > longest_outage) longest_outage = outage_length;
}
}
return longest_outage;
}
const char *BOINC_RCSID_472504d8c2 = "$Id$";
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