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/*
* dmucs_host.cc: a DmucsHost is a representation of a compilation host.
*
* Copyright (C) 2005, 2006 Victor T. Norman
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program 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 General
* Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "dmucs.h"
#include "dmucs_dprop.h"
#include "dmucs_host.h"
#include "dmucs_db.h"
#include "dmucs_hosts_file.h"
#include "dmucs_host_state.h"
#include "dmucs_resolve.h"
#include <stdio.h>
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
DmucsHost::DmucsHost(const struct in_addr &ipAddr,
const DmucsDprop dprop,
const int numCpus, const int powerIndex) :
ipAddr_(ipAddr), dprop_(dprop), ncpus_(numCpus), pindex_(powerIndex),
ldavg1_(0), ldavg5_(0), ldavg10_(0),
lastUpdate_(0)
{
state_ = DmucsHostStateAvail::getInstance();
}
DmucsHost *
DmucsHost::createHost(const struct in_addr &ipAddr,
const DmucsDprop dprop,
const std::string &hostsInfoFile)
{
/*
* Read the hosts file, and find the entry in it for this host.
*/
DmucsHostsFile *hostsFile = DmucsHostsFile::getInstance(hostsInfoFile);
int numCpus = 1;
int powerIndex = 1;
hostsFile->getDataForHost(ipAddr, &numCpus, &powerIndex);
DmucsHost *newHost = new DmucsHost(ipAddr, dprop, numCpus, powerIndex);
DmucsDb::getInstance()->addNewHost(newHost);
return newHost;
}
const int
DmucsHost::getStateAsInt() const
{
return state_->asInt();
}
int
DmucsHost::getTier() const
{
return calcTier(ldavg1_, ldavg5_, ldavg10_, pindex_);
}
int
DmucsHost::calcTier(float ldavg1, float ldavg5, float ldavg10,
int pindex) const
{
if (ldavg1 < 0.9) {
return pindex;
} else if (ldavg5 < 0.7) {
return pindex;
} else if (ldavg10 < 0.8) {
return pindex - 1;
} else {
return 0; // 0 means don't use this host.
}
}
void
DmucsHost::updateTier(float ldAvg1, float ldAvg5, float ldAvg10)
{
ldAvg1 /= (float) ncpus_;
ldAvg5 /= (float) ncpus_;
ldAvg10 /= (float) ncpus_;
int newTier = calcTier(ldAvg1, ldAvg5, ldAvg10, pindex_);
int oldTier = getTier();
if (newTier != oldTier) {
DMUCS_DEBUG((stderr, "oldTier %d, newTier %d\n", oldTier, newTier));
if (newTier == 0) {
/* This host is completely overloaded: remove the CPU objects
from their current tier, and move this host object to the
overloaded state. */
overloaded();
ldavg1_ = ldAvg1; ldavg5_ = ldAvg5; ldavg10_ = ldAvg10;
} else if (oldTier == 0) {
/* This host was overloaded, but now it is not.
Move the cpu objects from one tier to another. */
DmucsDb::getInstance()->moveCpus(this, oldTier, newTier);
ldavg1_ = ldAvg1; ldavg5_ = ldAvg5; ldavg10_ = ldAvg10;
} else {
/* Move the cpu objects from one tier to another. */
DmucsDb::getInstance()->moveCpus(this, oldTier, newTier);
ldavg1_ = ldAvg1; ldavg5_ = ldAvg5; ldavg10_ = ldAvg10;
}
} else {
ldavg1_ = ldAvg1; ldavg5_ = ldAvg5; ldavg10_ = ldAvg10;
}
lastUpdate_ = time(0);
}
void
DmucsHost::avail()
{
state_->avail(this);
}
void
DmucsHost::unavail()
{
state_->unavail(this);
}
void
DmucsHost::silent()
{
state_->silent(this);
}
void
DmucsHost::overloaded()
{
state_->overloaded(this);
}
void
DmucsHost::changeState(DmucsHostState *state)
{
state_ = state;
state_->addToDb(this);
}
bool
DmucsHost::seemsDown() const
{
return (time(0) - lastUpdate_ > DMUCS_HOST_SILENT_TIME);
}
bool
DmucsHost::isUnavailable() const
{
return (state_->asInt() == STATUS_UNAVAILABLE);
}
bool
DmucsHost::isSilent() const
{
return (state_->asInt() == STATUS_SILENT);
}
bool
DmucsHost::isOverloaded() const
{
return (state_->asInt() == STATUS_OVERLOADED);
}
void
DmucsHost::dump()
{
fprintf(stderr,
"Host: %20.20s Dprop: %8.8s State: %s Pindex: %d Ncpus %d\n",
inet_ntoa(ipAddr_), dprop2cstr(dprop_), state_->dump(),
pindex_, ncpus_);
}
const std::string &
DmucsHost::getName()
{
if (! resolvedName_.empty()) {
return resolvedName_;
}
return getHostName(resolvedName_, ipAddr_);
}
/*
* Given in IP address, find the host in the host database. If its name has
* already been found, then return it. Otherwise, resolve it and store it
* in the host and return the string.
*/
std::string
DmucsHost::resolveIp2Name(unsigned int ipAddr, DmucsDprop dprop)
{
/* Search for DmucsHost, based on Ip Address */
struct in_addr c;
c.s_addr = ipAddr;
return DmucsDb::getInstance()->getHost(c, dprop)->getName();
}
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