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boinc/client/cs_scheduler.C

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// The contents of this file are subject to the Mozilla Public License
// Version 1.0 (the "License"); you may not use this file except in
// compliance with the License. You may obtain a copy of the License at
// http://www.mozilla.org/MPL/
//
// Software distributed under the License is distributed on an "AS IS"
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
// License for the specific language governing rights and limitations
// under the License.
//
// The Original Code is the Berkeley Open Infrastructure for Network Computing.
//
// The Initial Developer of the Original Code is the SETI@home project.
// Portions created by the SETI@home project are Copyright (C) 2002
// University of California at Berkeley. All Rights Reserved.
//
// Contributor(s):
//
#include <stdio.h>
#include <math.h>
#include <time.h>
#include "error_numbers.h"
#include "file_names.h"
#include "parse.h"
#include "log_flags.h"
#include "message.h"
#include "scheduler_reply.h"
#include "client_state.h"
// quantities like avg CPU time decay by a factor of e every week
#define EXP_DECAY_RATE (1./(3600*24*7))
// TODO: implement hi/lo water mark scheme
//
bool CLIENT_STATE::need_work() {
unsigned int i;
for (i=0; i<results.size(); i++) {
RESULT* rp = results[i];
if (!rp->is_compute_done) return false;
}
return true;
}
void CLIENT_STATE::update_avg_cpu(PROJECT* p) {
int now = time(0);
double deltat = now - p->exp_avg_mod_time;
if (deltat > 0) {
if (p->exp_avg_cpu != 0) {
p->exp_avg_cpu *= exp(deltat*EXP_DECAY_RATE);
}
p->exp_avg_mod_time = now;
}
}
// choose a project to ask for work
//
PROJECT* CLIENT_STATE::choose_project() {
PROJECT* p, *bestp;
unsigned int i;
double best_ratio, ratio;
// update the average CPU times of all projects
//
for (i=0; i<projects.size(); i++) {
update_avg_cpu(projects[i]);
}
// pick the project for which share/avg is largest
// (and we have permission to contact it)
//
best_ratio = 0;
bestp = 0;
for (i=0; i<projects.size(); i++) {
p = projects[i];
if (time(0) < p->next_request_time) continue;
if (p->exp_avg_cpu == 0) return p;
ratio = p->resource_share/p->exp_avg_cpu;
if (ratio > best_ratio) {
best_ratio = ratio;
bestp = p;
}
}
return bestp;
}
int CLIENT_STATE::make_scheduler_request(PROJECT* p, int work_req) {
FILE* f = fopen(SCHED_OP_REQUEST_FILE, "w");
unsigned int i;
RESULT* rp;
if (!f) return ERR_FOPEN;
fprintf(f,
"<scheduler_request>\n"
" <authenticator>%s</authenticator>\n"
" <hostid>%d</hostid>\n"
" <rpc_seqno>%d</rpc_seqno>\n"
" <platform_name>%s</platform_name>\n"
" <core_client_version>%d</core_client_version>\n"
" <work_req_seconds>%d</work_req_seconds>\n",
p->authenticator,
p->hostid,
p->rpc_seqno,
platform_name,
version,
work_req
);
// send the prefs mod time only to the home project
//
if (p->home_project) {
fprintf(f,
" <prefs_mod_time>%d</prefs_mod_time>\n",
prefs.modified_time
);
}
time_stats.write(f, true);
net_stats.write(f, true);
host_info.write(f);
for (i=0; i<results.size(); i++) {
rp = results[i];
if (rp->project == p && !rp->is_server_ack) {
if (rp->is_upload_done()) {
rp->write(f, true);
}
}
}
fprintf(f, "</scheduler_request>\n");
fclose(f);
if (log_flags.sched_ops) {
printf("Sending request to scheduler: %s\n", p->scheduler_url);
}
if (log_flags.sched_op_debug) {
f = fopen(SCHED_OP_REQUEST_FILE, "r");
printf("--------- SCHEDULER REQUEST ---------\n");
copy_stream(f, stdout);
printf("--------- END ---------\n");
fclose(f);
}
return 0;
}
// manage the task of maintaining a supply of work.
//
bool CLIENT_STATE::get_work() {
PROJECT* p;
int retval;
bool action=false;
if (need_work()) {
if (scheduler_op.http_op_state == HTTP_STATE_IDLE) {
// if no scheduler request pending, start one
//
p = choose_project();
if (!p) {
if (log_flags.sched_op_debug) {
printf("all projects temporarily backed off\n");
}
return false;
}
retval = make_scheduler_request(p, 1000);
scheduler_op.init_post(
p->scheduler_url, SCHED_OP_REQUEST_FILE, SCHED_OP_RESULT_FILE
);
scheduler_op_project = p;
http_ops->insert(&scheduler_op);
p->rpc_seqno++;
action = true;
} else {
if (scheduler_op.http_op_state == HTTP_STATE_DONE) {
action = true;
http_ops->remove(&scheduler_op);
scheduler_op.http_op_state = HTTP_STATE_IDLE;
int retval = scheduler_op.http_op_retval;
if (!retval) {
handle_scheduler_reply(scheduler_op_project);
client_state_dirty = true;
} else {
if (log_flags.sched_ops) {
printf("HTTP work request failed: %d\n", retval);
}
}
}
}
}
return action;
}
void CLIENT_STATE::handle_scheduler_reply(PROJECT* project) {
SCHEDULER_REPLY sr;
FILE* f;
int retval;
unsigned int i;
contacted_sched_server = true;
if (log_flags.sched_ops) {
printf("Got reply from scheduler %s\n", project->scheduler_url);
}
if (log_flags.sched_op_debug) {
f = fopen(SCHED_OP_RESULT_FILE, "r");
printf("------------- SCHEDULER REPLY ----------\n");
copy_stream(f, stdout);
fclose(f);
printf("------------- END ----------\n");
}
f = fopen(SCHED_OP_RESULT_FILE, "r");
retval = sr.parse(f);
if (strlen(sr.message)) {
show_message(sr.message, sr.message_priority);
}
// copy new entities to client state
//
if (sr.request_delay) {
project->next_request_time = time(0) + sr.request_delay;
}
if (sr.hostid) {
project->hostid = sr.hostid;
project->rpc_seqno = 0;
}
if (sr.prefs.modified_time > prefs.modified_time) {
prefs = sr.prefs;
}
for (i=0; i<sr.apps.size(); i++) {
APP* app = lookup_app(project, sr.apps[i].name);
if (app) {
*app = sr.apps[i];
} else {
app = new APP;
*app = sr.apps[i];
retval = link_app(project, app);
if (!retval) apps.push_back(app);
}
}
for (i=0; i<sr.file_infos.size(); i++) {
if (!lookup_file_info(project, sr.file_infos[i].name)) {
FILE_INFO* fip = new FILE_INFO;
*fip = sr.file_infos[i];
retval = link_file_info(project, fip);
if (!retval) file_infos.push_back(fip);
}
}
for (i=0; i<sr.app_versions.size(); i++) {
APP* app = lookup_app(project, sr.app_versions[i].app_name);
if (!lookup_app_version(app, sr.app_versions[i].version_num)) {
APP_VERSION* avp = new APP_VERSION;
*avp = sr.app_versions[i];
retval = link_app_version(project, avp);
if (!retval) app_versions.push_back(avp);
}
}
for (i=0; i<sr.workunits.size(); i++) {
if (!lookup_workunit(project, sr.workunits[i].name)) {
WORKUNIT* wup = new WORKUNIT;
*wup = sr.workunits[i];
retval = link_workunit(project, wup);
if (!retval) workunits.push_back(wup);
}
}
for (i=0; i<sr.results.size(); i++) {
if (!lookup_result(project, sr.results[i].name)) {
RESULT* rp = new RESULT;
*rp = sr.results[i];
retval = link_result(project, rp);
if (!retval) results.push_back(rp);
}
}
// update records for ack'ed results
//
for (i=0; i<sr.result_acks.size(); i++) {
RESULT* rp = lookup_result(project, sr.result_acks[i].name);
if (log_flags.sched_op_debug) {
printf("got ack for result %s\n", sr.result_acks[i].name);
}
if (rp) {
rp->is_server_ack = true;
} else {
fprintf(stderr,
"ERROR: got ack for result %s, can't find\n",
sr.result_acks[i].name
);
}
}
print_counts();
}
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