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boinc/sched/sched_shmem.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/>.
// SCHED_SHMEM is the structure of a chunk of memory shared between
// the feeder (which reads from the database)
// and instances of the scheduling server
#include "config.h"
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <string>
#include <vector>
using std::vector;
#include "boinc_db.h"
#include "error_numbers.h"
#ifdef _USING_FCGI_
#include "boinc_fcgi.h"
#endif
#include "sched_shmem.h"
#include "sched_util.h"
#include "sched_msgs.h"
void SCHED_SHMEM::init(int nwu_results) {
int size = sizeof(SCHED_SHMEM) + nwu_results*sizeof(WU_RESULT);
memset(this, 0, size);
ss_size = size;
platform_size = sizeof(PLATFORM);
app_size = sizeof(APP);
app_version_size = sizeof(APP_VERSION);
assignment_size = sizeof(ASSIGNMENT);
wu_result_size = sizeof(WU_RESULT);
max_platforms = MAX_PLATFORMS;
max_apps = MAX_APPS;
max_app_versions = MAX_APP_VERSIONS;
max_assignments = MAX_ASSIGNMENTS;
max_wu_results = nwu_results;
}
static int error_return(const char* p) {
fprintf(stderr, "Error in structure: %s\n", p);
return ERR_SCHED_SHMEM;
}
int SCHED_SHMEM::verify() {
int size = sizeof(SCHED_SHMEM) + max_wu_results*sizeof(WU_RESULT);
if (ss_size != size) return error_return("shmem");
if (platform_size != sizeof(PLATFORM)) return error_return("platform");
if (app_size != sizeof(APP)) return error_return("app");
if (app_version_size != sizeof(APP_VERSION)) return error_return("app_version");
if (assignment_size != sizeof(ASSIGNMENT)) return error_return("assignment");
if (wu_result_size != sizeof(WU_RESULT)) return error_return("wu_result");
if (max_platforms != MAX_PLATFORMS) return error_return("max platform");
if (max_apps != MAX_APPS) return error_return("max apps");
if (max_app_versions != MAX_APP_VERSIONS) return error_return("max app versions");
if (max_assignments != MAX_ASSIGNMENTS) return error_return("max assignments");
return 0;
}
static void overflow(const char* table, const char* param_name) {
log_messages.printf(MSG_CRITICAL,
"The SCHED_SHMEM structure is too small for the %s table.\n"
"Either increase the %s parameter in sched_shmem.h and recompile,\n"
"or prune old rows from the table.\n"
"Then restart the project.\n",
table, param_name
);
exit(1);
}
int SCHED_SHMEM::scan_tables() {
DB_PLATFORM platform;
DB_APP app;
DB_APP_VERSION app_version;
DB_ASSIGNMENT assignment;
int i, j, n, retval;
n = 0;
while (!platform.enumerate()) {
if (platform.deprecated) continue;
platforms[n++] = platform;
if (n == MAX_PLATFORMS) {
overflow("platforms", "MAX_PLATFORMS");
}
}
nplatforms = n;
n = 0;
app_weights = 0;
while (!app.enumerate()) {
if (app.deprecated) continue;
apps[n++] = app;
if (n == MAX_APPS) {
overflow("apps", "MAX_APPS");
}
app_weights += app.weight;
}
napps = n;
n = 0;
// for each (app, platform) pair,
// get all versions with numbers maximal in their plan class.
//
for (i=0; i<nplatforms; i++) {
PLATFORM& splatform = platforms[i];
for (j=0; j<napps; j++) {
APP& sapp = apps[j];
vector<APP_VERSION> avs;
char query[1024];
sprintf(query,
"where appid=%d and platformid=%d and deprecated=0",
sapp.id, splatform.id
);
while (!app_version.enumerate(query)) {
avs.push_back(app_version);
}
for (unsigned int k=0; k<avs.size(); k++) {
APP_VERSION& av1 = avs[k];
for (unsigned int kk=0; kk<avs.size(); kk++) {
if (k == kk) continue;
APP_VERSION& av2 = avs[kk];
if (!strcmp(av1.plan_class, av2.plan_class) && av1.version_num > av2.version_num) {
av2.deprecated = 1;
}
}
}
for (unsigned int k=0; k<avs.size(); k++) {
APP_VERSION& av1 = avs[k];
if (av1.deprecated) continue;
app_versions[n++] = av1;
if (n == MAX_APP_VERSIONS) {
overflow("app_versions", "MAX_APP_VERSIONS");
}
}
}
}
napp_versions = n;
// see which resources we have app versions for
//
have_cpu_apps = false;
have_cuda_apps = false;
have_ati_apps = false;
for (i=0; i<napp_versions; i++) {
APP_VERSION& av = app_versions[i];
if (strstr(av.plan_class, "cuda")) {
have_cuda_apps = true;
} else if (strstr(av.plan_class, "ati")) {
have_ati_apps = true;
} else {
have_cpu_apps = true;
}
}
n = 0;
while (!assignment.enumerate()) {
assignments[n++] = assignment;
if (n == MAX_ASSIGNMENTS) {
overflow("assignments", "MAX_ASSIGNMENTS");
}
}
nassignments = n;
return 0;
}
PLATFORM* SCHED_SHMEM::lookup_platform(char* name) {
for (int i=0; i<nplatforms; i++) {
if (!strcmp(platforms[i].name, name)) {
return &platforms[i];
}
}
return 0;
}
PLATFORM* SCHED_SHMEM::lookup_platform_id(int id) {
for (int i=0; i<nplatforms; i++) {
if (platforms[i].id == id) return &platforms[i];
}
return 0;
}
APP* SCHED_SHMEM::lookup_app(int id) {
for (int i=0; i<napps; i++) {
if (apps[i].id == id) return &apps[i];
}
return 0;
}
// find an app version for a given platform
//
APP_VERSION* SCHED_SHMEM::lookup_app_version(int appid, int platformid) {
APP_VERSION* avp;
for (int i=0; i<napp_versions; i++) {
avp = &app_versions[i];
if (avp->appid == appid && avp->platformid == platformid) {
return avp;
}
}
return NULL;
}
// see if there's any work.
// If there is, reserve it for this process
// (if we don't do this, there's a race condition where lots
// of servers try to get a single work item)
//
bool SCHED_SHMEM::no_work(int pid) {
if (!ready) return true;
for (int i=0; i<max_wu_results; i++) {
if (wu_results[i].state == WR_STATE_PRESENT) {
wu_results[i].state = pid;
return false;
}
}
return true;
}
void SCHED_SHMEM::restore_work(int pid) {
for (int i=0; i<max_wu_results; i++) {
if (wu_results[i].state == pid) {
wu_results[i].state = WR_STATE_PRESENT;
return;
}
}
}
void SCHED_SHMEM::show(FILE* f) {
fprintf(f, "app versions:\n");
for (int i=0; i<napp_versions; i++) {
APP_VERSION av = app_versions[i];
fprintf(f, "appid: %d platformid: %d version_num: %d plan_class: %s\n",
av.appid, av.platformid, av.version_num, av.plan_class
);
}
fprintf(f,
"Jobs; key:\n"
"ap: app ID\n"
"ic: infeasible count\n"
"wu: workunit ID\n"
"rs: result ID\n"
"hr: HR class\n"
"nr: need reliable\n"
);
fprintf(f, "ready: %d\n", ready);
fprintf(f, "max_wu_results: %d\n", max_wu_results);
for (int i=0; i<max_wu_results; i++) {
WU_RESULT& wu_result = wu_results[i];
switch(wu_result.state) {
case WR_STATE_PRESENT:
fprintf(f, "%4d: ap %d ic %d wu %d rs %d hr %d nr %d\n",
i, wu_result.workunit.appid, wu_result.infeasible_count,
wu_result.workunit.id, wu_result.resultid,
wu_result.workunit.hr_class, wu_result.need_reliable
);
break;
case WR_STATE_EMPTY:
fprintf(f, "%4d: ---\n", i);
break;
default:
fprintf(f, "%4d: PID %d: result %d\n", i, wu_result.state, wu_result.resultid);
}
}
}
const char *BOINC_RCSID_e548c94703 = "$Id$";
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