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boinc/client/time_stats.cpp

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// This file is part of BOINC.
// http://boinc.berkeley.edu
// Copyright (C) 2008 University of California
//
// BOINC 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 3 of the License, or (at your option) any later version.
//
// BOINC 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.
//
// You should have received a copy of the GNU Lesser General Public License
// along with BOINC. If not, see <http://www.gnu.org/licenses/>.
#include "cpp.h"
#ifdef _WIN32
#include "boinc_win.h"
#else
#include "config.h"
#include <cstdio>
#include <ctime>
#include <cmath>
#include <cstring>
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#endif
#include "parse.h"
#include "util.h"
#include "filesys.h"
#include "error_numbers.h"
#include "client_msgs.h"
#include "file_names.h"
#include "client_state.h"
#include "network.h"
#include "log_flags.h"
#include "time_stats.h"
#define CONNECTED_STATE_UNINITIALIZED -1
#define CONNECTED_STATE_NOT_CONNECTED 0
#define CONNECTED_STATE_CONNECTED 1
#define CONNECTED_STATE_UNKNOWN 2
#ifndef SIM
#ifdef _WIN32
#include <sensapi.h>
int get_connected_state() {
DWORD flags;
return IsNetworkAlive(&flags)?CONNECTED_STATE_CONNECTED:CONNECTED_STATE_NOT_CONNECTED;
}
#else
// anyone know how to see if this host has physical network connection?
//
int get_connected_state() {
return CONNECTED_STATE_UNKNOWN;
}
#endif
#endif
// 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
TIME_STATS::TIME_STATS() {
last_update = 0;
first = true;
on_frac = 1;
connected_frac = 1;
active_frac = 1;
previous_connected_state = CONNECTED_STATE_UNINITIALIZED;
inactive_start = 0;
trim_stats_log();
time_stats_log = NULL;
}
// if log file is over a meg, discard everything older than a year
//
void TIME_STATS::trim_stats_log() {
#ifndef SIM
double size;
char buf[256];
int retval;
double x;
retval = file_size(TIME_STATS_LOG, size);
if (retval) return;
if (size < 1e6) return;
FILE* f = fopen(TIME_STATS_LOG, "r");
if (!f) return;
FILE* f2 = fopen(TEMP_TIME_STATS_FILE_NAME, "w");
if (!f2) {
fclose(f);
return;
}
while (fgets(buf, 256, f)) {
int n = sscanf(buf, "%lf", &x);
if (n != 1) continue;
if (x < gstate.now-86400*365) continue;
fputs(buf, f2);
}
fclose(f);
fclose(f2);
#endif
}
void send_log_after(const char* filename, double t, MIOFILE& mf) {
char buf[256];
double x;
FILE* f = fopen(filename, "r");
if (!f) return;
while (fgets(buf, 256, f)) {
int n = sscanf(buf, "%lf", &x);
if (n != 1) continue;
if (x < t) continue;
mf.printf("%s", buf);
}
fclose(f);
}
// copy the log file after a given time
//
void TIME_STATS::get_log_after(double t, MIOFILE& mf) {
if (time_stats_log) {
fclose(time_stats_log); // win: can't open twice
}
send_log_after(TIME_STATS_LOG, t, mf);
time_stats_log = fopen(TIME_STATS_LOG, "a");
}
// 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(int suspend_reason) {
double dt, w1, w2;
bool is_active = !(suspend_reason & ~SUSPEND_REASON_CPU_THROTTLE);
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;
log_append("power_on", gstate.now);
} else {
dt = gstate.now - last_update;
if (dt <= 10) return;
if (dt > 14*86400) {
// If dt is large it could be because user is upgrading
// from a client version that wasn't updating due to bug.
// Or it could be because user wasn't running for a while
// and is starting up again.
// In either case, don't decay on_frac.
//
dt = 0;
}
w1 = 1 - exp(-dt/ALPHA); // weight for recent period
w2 = 1 - w1; // weight for everything before that
// (close to zero if long gap)
int connected_state;
#ifdef SIM
connected_state = CONNECTED_STATE_NOT_CONNECTED;
#else
connected_state = get_connected_state();
if (gstate.network_suspend_reason) {
connected_state = CONNECTED_STATE_NOT_CONNECTED;
}
#endif
if (first) {
// the client has just started; this is the first call.
//
on_frac *= w2;
first = false;
log_append("power_off", last_update);
char buf[256];
#ifndef SIM
sprintf(buf, "platform %s", gstate.get_primary_platform());
log_append(buf, gstate.now);
#endif
sprintf(buf, "version %d.%d.%d", BOINC_MAJOR_VERSION, BOINC_MINOR_VERSION, BOINC_RELEASE);
log_append(buf, gstate.now);
log_append("power_on", gstate.now);
} else if (dt > 100) {
// large dt - the client or host must have been suspended
on_frac *= w2;
log_append("proc_stop", last_update);
if (is_active) {
log_append("proc_start", gstate.now);
}
} 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;
}
if (connected_state != previous_connected_state) {
log_append_net(connected_state);
previous_connected_state = connected_state;
}
active_frac *= w2;
if (is_active) {
active_frac += w1;
if (inactive_start) {
inactive_start = 0;
log_append("proc_start", gstate.now);
}
} else if (inactive_start == 0){
inactive_start = gstate.now;
log_append("proc_stop", gstate.now);
}
//msg_printf(NULL, MSG_INFO, "is_active %d, active_frac %f", is_active, active_frac);
}
last_update = gstate.now;
if (log_flags.time_debug) {
msg_printf(0, MSG_INFO,
"[time] dt %f w2 %f on %f; active %f; conn %f",
dt, w2, on_frac, active_frac, connected_frac
);
}
}
}
// 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",
on_frac,
connected_frac,
active_frac
);
if (!to_server) {
out.printf(
" <last_update>%f</last_update>\n",
last_update
);
}
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];
double x;
while (in.fgets(buf, 256)) {
if (match_tag(buf, "</time_stats>")) return 0;
else if (parse_double(buf, "<last_update>", x)) {
if (x < 0 || x > gstate.now) {
msg_printf(0, MSG_INTERNAL_ERROR,
"bad value %f of time stats last update; ignoring", x
);
} else {
last_update = x;
}
continue;
} else if (parse_double(buf, "<on_frac>", x)) {
if (x <= 0 || x > 1) {
msg_printf(0, MSG_INTERNAL_ERROR,
"bad value %f of time stats on_frac; ignoring", x
);
} else {
on_frac = x;
}
continue;
} else if (parse_double(buf, "<connected_frac>", x)) {
// -1 means undefined; skip check
connected_frac = x;
continue;
} else if (parse_double(buf, "<active_frac>", x)) {
if (x <= 0 || x > 1) {
msg_printf(0, MSG_INTERNAL_ERROR,
"bad value %f of time stats active_frac; ignoring", x
);
} else {
active_frac = x;
}
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;
}
void TIME_STATS::start() {
time_stats_log = fopen(TIME_STATS_LOG, "a");
if (time_stats_log) {
setbuf(time_stats_log, 0);
}
}
void TIME_STATS::quit() {
log_append("power_off", gstate.now);
}
#ifdef SIM
void TIME_STATS::log_append(const char* , double ) {}
#else
void TIME_STATS::log_append(const char* msg, double t) {
if (!time_stats_log) return;
fprintf(time_stats_log, "%f %s\n", t, msg);
}
#endif
void TIME_STATS::log_append_net(int new_state) {
switch(new_state) {
case CONNECTED_STATE_NOT_CONNECTED:
log_append("net_not_connected", gstate.now);
break;
case CONNECTED_STATE_CONNECTED:
log_append("net_connected", gstate.now);
break;
case CONNECTED_STATE_UNKNOWN:
log_append("net_unknown", gstate.now);
break;
}
}
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