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- Altered randomization factor in version selection to remove slower versions 

from distributions more rapidly.


svn path=/trunk/boinc/; revision=25958
This commit is contained in:
Eric J. Korpela 2012-08-02 23:18:51 +00:00
parent c4b337d276
commit d7b7609059
1 changed files with 13 additions and 1 deletions
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14
sched/sched_version.cpp
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@ -753,11 +753,23 @@ BEST_APP_VERSION* get_app_version(
// pick the fastest version.
// Throw in a random factor in case the estimates are off.
//
DB_HOST_APP_VERSION* havp = gavid_to_havp(av.id);
double r = 1;
long n=1;
if (havp) {
n=std::max((long)havp->pfc.n,(long)n);
}
if (config.version_select_random_factor) {
r += config.version_select_random_factor*rand_normal();
r += config.version_select_random_factor*rand_normal()/n;
}
if (r*host_usage.projected_flops > bavp->host_usage.projected_flops) {
if (config.debug_version_select && (host_usage.projected_flops <= bavp->host_usage.projected_flops)) {
log_messages.printf(MSG_NORMAL,
"[version] [AV#%d] Random factor wins. r=%f n=%d\n",
av.id, r, n
);
}
host_usage.projected_flops*=r;
bavp->host_usage = host_usage;
bavp->avp = &av;
bavp->reliable = app_version_is_reliable(av.id);