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boinc/sched/sched_version.cpp

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// This file is part of BOINC.
// http://boinc.berkeley.edu
// Copyright (C) 2016 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/>.
// Logic for deciding what app version to use for jobs.
//
// The main interface is get_app_version(),
// which returns the "best" app version for a given job, i.e. which
// - passes the plan class test for this host
// - uses a resource for which work is being requested.
// - has the highest projected FLOPS
//
// Normally we choose among the project's app versions.
// However, if the client is using anonymous platform,
// we choose among the client's app versions.
#include "boinc_db.h"
#include "sched_main.h"
#include "sched_msgs.h"
#include "sched_config.h"
#include "sched_customize.h"
#include "sched_types.h"
#include "sched_util.h"
#include "credit.h"
#include "sched_version.h"
static inline void dont_need_message(
const char* p, APP_VERSION* avp, CLIENT_APP_VERSION* cavp
) {
if (!config.debug_version_select) return;
if (avp) {
log_messages.printf(MSG_NORMAL,
"[version] [AV#%lu] Don't need %s jobs, skipping\n",
avp->id, p
);
} else if (cavp) {
log_messages.printf(MSG_NORMAL,
"[version] Don't need %s jobs, skipping anonymous version %d for %s (%s)\n",
p, cavp->version_num, cavp->app_name, cavp->plan_class
);
}
}
// check that the app version uses a resource for which we need work
//
static bool need_this_resource(
HOST_USAGE& host_usage, APP_VERSION* avp, CLIENT_APP_VERSION* cavp
) {
if (!g_wreq->rsc_spec_request) {
return true;
}
int pt = host_usage.proc_type;
if (!g_wreq->need_proc_type(pt)) {
dont_need_message(proc_type_name(pt), avp, cavp);
return false;
}
return true;
}
static DB_HOST_APP_VERSION* lookup_host_app_version(DB_ID_TYPE gavid) {
for (unsigned int i=0; i<g_wreq->host_app_versions.size(); i++) {
DB_HOST_APP_VERSION& hav = g_wreq->host_app_versions[i];
if (hav.app_version_id == gavid) return &hav;
}
return NULL;
}
static inline bool app_version_is_trusted(DB_ID_TYPE gavid) {
DB_HOST_APP_VERSION* havp = lookup_host_app_version(gavid);
if (!havp) return false;
return havp->trusted;
}
static inline bool app_version_is_reliable(DB_ID_TYPE gavid) {
DB_HOST_APP_VERSION* havp = lookup_host_app_version(gavid);
if (!havp) return false;
return havp->reliable;
}
inline DB_ID_TYPE host_usage_to_gavid(HOST_USAGE& hu, APP& app) {
return app.id*1000000 - hu.resource_type();
}
// scale daily quota by # processors and/or by config.gpu_multiplier
//
inline int scaled_max_jobs_per_day(DB_HOST_APP_VERSION& hav, HOST_USAGE& hu) {
int n = hav.max_jobs_per_day;
// if max jobs per day is 1, don't scale;
// this host probably can't use this app version at all.
// Allow 1 job/day in case something changes.
//
if (n == 1) return 1;
if (hu.proc_type == PROC_TYPE_CPU) {
if (g_reply->host.p_ncpus) {
n *= g_reply->host.p_ncpus;
}
} else {
COPROC* cp = g_request->coprocs.proc_type_to_coproc(hu.proc_type);
if (cp->count) {
n *= cp->count;
}
if (config.gpu_multiplier) {
n *= config.gpu_multiplier;
}
}
if (config.debug_quota) {
log_messages.printf(MSG_NORMAL,
"[quota] [AV#%lu] scaled max jobs per day: %d\n",
hav.app_version_id,
n
);
}
return n;
}
// are we at the jobs/day limit for this (host, app version)?
// (if so don't use the app version)
//
inline bool daily_quota_exceeded(DB_ID_TYPE gavid, HOST_USAGE& hu) {
DB_HOST_APP_VERSION* havp = lookup_host_app_version(gavid);
if (!havp) return false;
int q = scaled_max_jobs_per_day(*havp, hu);
if (havp->n_jobs_today >= q) {
if (config.debug_quota) {
log_messages.printf(MSG_NORMAL,
"[quota] [AV#%lu] daily quota exceeded: %d >= %d\n",
gavid, havp->n_jobs_today, q
);
}
havp->daily_quota_exceeded = true;
return true;
}
return false;
}
// scan through client's anonymous apps and pick the best one
//
CLIENT_APP_VERSION* get_app_version_anonymous(
APP& app, bool need_64b, bool reliable_only
) {
unsigned int i;
CLIENT_APP_VERSION* best = NULL;
bool found = false;
char message[256];
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] get_app_version_anonymous: app %s%s\n",
app.name, reliable_only?" (reliable only)":""
);
}
for (i=0; i<g_request->client_app_versions.size(); i++) {
CLIENT_APP_VERSION& cav = g_request->client_app_versions[i];
if (!cav.app) continue;
if (cav.app->id != app.id) {
continue;
}
if (need_64b && !is_64b_platform(cav.platform)) {
continue;
}
int gavid = host_usage_to_gavid(cav.host_usage, app);
if (reliable_only && !app_version_is_reliable(gavid)) {
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] %d %s not reliable\n",
cav.version_num, cav.plan_class
);
}
continue;
}
if (daily_quota_exceeded(gavid, cav.host_usage)) {
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] %d %s daily quota exceeded\n",
cav.version_num, cav.plan_class
);
}
continue;
}
if (cav.version_num < app.min_version) {
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] %d %s version < min version\n",
cav.version_num, cav.plan_class
);
}
continue;
}
found = true;
if (!need_this_resource(cav.host_usage, NULL, &cav)) {
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] %d %s don't need resource\n",
cav.version_num, cav.plan_class
);
}
continue;
}
if (best) {
if (cav.host_usage.projected_flops > best->host_usage.projected_flops) {
best = &cav;
}
} else {
best = &cav;
}
}
if (!best) {
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] Didn't find anonymous platform app for %s\n",
app.name
);
}
}
if (!found) {
sprintf(message,
"%s %s.",
_("Your app_info.xml file doesn't have a usable version of"),
app.user_friendly_name
);
add_no_work_message(message);
}
return best;
}
#define ET_RATIO_LIMIT 250.
// if the FLOPS estimate based on elapsed time
// exceeds projected_flops by more than this factor, cap it.
// The host may have received a bunch of short jobs recently
#define GPU_CPU_RATIO 10.
// a conservative estimate of the ratio of a typical GPU to CPU
// input:
// cav.host_usage.projected_flops
// This is the <flops> specified in app_info.xml
// If not specified there, it's a conservative estimate
// (CPU speed * (ncpus + 10*ngpus))
// In either case, this value will be used by the client
// to estimate job runtime and runtime limit
// est runtime = wu.rsc_fpops_est/x
// runtime limit = wu.rsc_fpops_bound/x
// x may be way off from the actual speed.
// So to get accurate runtime est, we need to adjust wu.rsc_fpops_est
//
// output:
// cav.host_usage.projected_flops
// An estimate of the actual FLOPS the app will get,
// based on elapsed time history (if possible).
// This is used by the scheduler to estimate runtime.
// cav.rsc_fpops_scale
// wu.rsc_fpops_est and wu.rsc_fpops_bound will be scaled by this
//
// called at start of send_work().
//
void estimate_flops_anon_platform() {
unsigned int i;
for (i=0; i<g_request->client_app_versions.size(); i++) {
CLIENT_APP_VERSION& cav = g_request->client_app_versions[i];
if (!cav.app) continue;
cav.rsc_fpops_scale = 1;
if (cav.host_usage.avg_ncpus == 0
&& cav.host_usage.proc_type == PROC_TYPE_CPU
) {
cav.host_usage.avg_ncpus = 1;
}
// if projected_flops is missing, make a wild guess
// Note: 6.12+ clients supply a project FLOPS,
// even if the user didn't
//
if (cav.host_usage.projected_flops == 0) {
cav.host_usage.projected_flops = g_reply->host.p_fpops;
}
// If data is available, estimate FLOPS based on average elapsed time
//
DB_HOST_APP_VERSION* havp = gavid_to_havp(
generalized_app_version_id(
cav.host_usage.resource_type(), cav.app->id
)
);
if (havp
&& (havp->et.n > MIN_HOST_SAMPLES)
&& (havp->et.get_avg() > 0)
) {
double new_flops = 1./havp->et.get_avg();
// cap this at ET_RATIO_LIMIT*projected,
// in case we've had a bunch of short jobs recently
//
if (new_flops > ET_RATIO_LIMIT*cav.host_usage.projected_flops) {
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] (%s) capping new_flops; %.1fG > %.0f*%.1fG\n",
cav.plan_class, new_flops/1e9,
ET_RATIO_LIMIT,
cav.host_usage.projected_flops/1e9
);
}
new_flops = ET_RATIO_LIMIT*cav.host_usage.projected_flops;
}
cav.rsc_fpops_scale = cav.host_usage.projected_flops/new_flops;
cav.host_usage.projected_flops = new_flops;
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] (%s) setting projected flops to %fG based on ET\n",
cav.plan_class, new_flops/1e9
);
log_messages.printf(MSG_NORMAL,
"[version] setting rsc_fpops_scale to %g\n",
cav.rsc_fpops_scale
);
}
} else {
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] (%s) using client-supplied flops %fG\n",
cav.plan_class, cav.host_usage.projected_flops/1e9
);
}
}
}
}
// compute HOST_USAGE::projected_flops, which is used to estimate job runtime:
// est. runtime = wu.rsc_fpops_est / projected_flops
// so project_flops must reflect systematic errors in rsc_fpops_est
//
// 1) if we have statistics for (host, app version) and
// <estimate_flops_from_hav_pfc> is not set use elapsed time,
// otherwise use pfc_avg.
// 2) if we have statistics for app version elapsed time, use those.
// 3) else use a conservative estimate (p_fpops*(cpu usage + gpu usage))
// This prevents jobs from aborting with "time limit exceeded"
// even if the estimate supplied by the plan class function is way off
//
#define RTE_HAV_STATS 1
#define RTE_AV_STATS 2
#define RTE_NO_STATS 3
void estimate_flops(HOST_USAGE& hu, APP_VERSION& av) {
int mode;
DB_HOST_APP_VERSION* havp = NULL;
if (config.rte_no_stats) {
mode = RTE_NO_STATS;
} else {
havp = gavid_to_havp(av.id);
if (havp && havp->et.n > MIN_HOST_SAMPLES) {
mode = RTE_HAV_STATS;
} else {
if (av.pfc.n > MIN_VERSION_SAMPLES) {
mode = RTE_AV_STATS;
} else {
mode = RTE_NO_STATS;
}
}
}
switch (mode) {
case RTE_HAV_STATS:
double new_flops;
if (config.estimate_flops_from_hav_pfc) {
new_flops = hu.peak_flops / (havp->pfc.get_avg()+1e-18);
} else {
new_flops = 1./havp->et.get_avg();
}
// cap this at ET_RATIO_LIMIT*projected,
// in case we've had a bunch of short jobs recently
//
if (new_flops > ET_RATIO_LIMIT*hu.projected_flops) {
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] (%s) capping new_flops; %.1fG > %.0f*%.1fG\n",
av.plan_class, new_flops/1e9,
ET_RATIO_LIMIT,
hu.projected_flops/1e9
);
}
new_flops = ET_RATIO_LIMIT*hu.projected_flops;
}
hu.projected_flops = new_flops;
if (config.debug_version_select) {
if (config.estimate_flops_from_hav_pfc) {
log_messages.printf(MSG_NORMAL,
"[version] [AV#%lu] (%s) setting projected flops based on host_app_version pfc: %.2fG\n",
av.id, av.plan_class, hu.projected_flops/1e9
);
} else {
log_messages.printf(MSG_NORMAL,
"[version] [AV#%lu] (%s) setting projected flops based on host elapsed time avg: %.2fG\n",
av.id, av.plan_class, hu.projected_flops/1e9
);
}
log_messages.printf(MSG_NORMAL,
"[version] [AV#%lu] (%s) comparison pfc: %.2fG et: %.2fG\n",
av.id, av.plan_class, hu.peak_flops/(havp->pfc.get_avg()+1e-18)/1e+9,
1e-9/havp->et.get_avg()
);
}
break;
case RTE_AV_STATS:
hu.projected_flops = hu.peak_flops/av.pfc.get_avg();
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] [AV#%lu] (%s) adjusting projected flops based on PFC avg: %.2fG\n",
av.id, av.plan_class, hu.projected_flops/1e9
);
}
break;
case RTE_NO_STATS:
hu.projected_flops = g_reply->host.p_fpops * (hu.avg_ncpus + GPU_CPU_RATIO*hu.gpu_usage);
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] [AV#%lu] (%s) using conservative projected flops: %.2fG\n",
av.id, av.plan_class, hu.projected_flops/1e9
);
}
break;
}
}
// return a string describing an app version
//
static void app_version_desc(BEST_APP_VERSION& bav, char* buf) {
if (!bav.present) {
strcpy(buf, "none");
return;
}
if (bav.cavp) {
sprintf(buf, "anonymous platform (%s)", proc_type_name(bav.host_usage.proc_type));
} else {
sprintf(buf, "[AV#%lu]", bav.avp->id);
}
}
// different OSs have different max user address space for 32 bit apps
//
static double max_32b_address_space() {
if (strstr(g_request->platform.name, "windows")) {
return 2*GIGA;
} else if (strstr(g_request->platform.name, "linux")) {
return 3*GIGA;
} else if (strstr(g_request->platform.name, "darwin")) {
return 4*GIGA;
} else if (strstr(g_request->platform.name, "solaris")) {
return 4*GIGA;
} else if (strstr(g_request->platform.name, "anonymous")) {
// problem case. assume windows
return 2*GIGA;
}
return 2*GIGA;
}
// The WU is already committed to an app version.
// - check if this host supports that platform
// - if plan class, check if this host can handle it
// - check if we need work for the resource
//
// If all these are satisfied, return a pointer to a BEST_APP_VERSION struct
// with HOST_USAGE filled in correctly.
// Else return NULL.
//
static BEST_APP_VERSION* check_homogeneous_app_version(
const WORKUNIT& wu, bool /* reliable_only */
// TODO: enforce reliable_only
) {
BEST_APP_VERSION bav;
bool found;
APP_VERSION *avp = ssp->lookup_app_version(wu.app_version_id);
if (!avp) {
// If the app version is not in shmem,
// it's been superceded or deprecated.
// Use it anyway.
// Keep an array of such app versions in
// SCHEDULER_REPLY::old_app_versions
//
found = false;
for (unsigned int i=0; i<g_reply->old_app_versions.size(); i++) {
APP_VERSION& av = g_reply->old_app_versions[i];
if (av.id == wu.app_version_id) {
avp = &av;
found = true;
break;
}
}
if (!found) {
DB_APP_VERSION av;
int retval = av.lookup_id(wu.app_version_id);
if (retval) return NULL;
g_reply->old_app_versions.push_back(av);
avp = &(g_reply->old_app_versions.back());
}
}
// see if this host supports the version's platform
//
found = false;
for (unsigned int i=0; i<g_request->platforms.list.size(); i++) {
PLATFORM* p = g_request->platforms.list[i];
if (p->id == avp->platformid) {
found = true;
bav.avp = avp;
break;
}
}
if (!found) return NULL;
// and see if it supports the plan class
//
if (strlen(avp->plan_class)) {
if (!app_plan(*g_request, avp->plan_class, bav.host_usage, &wu)) {
return NULL;
}
} else {
bav.host_usage.sequential_app(capped_host_fpops());
}
// and see if the client is asking for this resource
//
if (!need_this_resource(bav.host_usage, avp, NULL)) {
return NULL;
}
// dynamically allocate the BEST_APP_VERSION.
// This is a memory leak, but that's OK
//
BEST_APP_VERSION* bavp = new BEST_APP_VERSION;
*bavp = bav;
return bavp;
}
// return the app version with greatest projected FLOPS
// for the given job and host, or NULL if none is available
//
// NOTE: the BEST_APP_VERSION structure returned by this
// must not be modified or reused;
// a pointer to it is stored in APP_VERSION.
//
// check_req: if set, return only app versions that use resources
// for which the work request is nonzero.
// This check is not done for:
// - assigned jobs
// - resent jobs
// reliable_only: use only versions for which this host is "reliable"
//
// We "memoize" the results, maintaining an array g_wreq->best_app_versions
// that maps app ID to the best app version (or NULL).
//
BEST_APP_VERSION* get_app_version(
const WORKUNIT& wu, bool check_req, bool reliable_only
) {
unsigned int i;
int j;
BEST_APP_VERSION* bavp;
char buf[256];
bool job_needs_64b = (wu.rsc_memory_bound > max_32b_address_space());
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] get_app_version(): getting app version for WU#%lu (%s) appid:%lu\n",
wu.id, wu.name, wu.appid
);
if (job_needs_64b) {
log_messages.printf(MSG_NORMAL,
"[version] job needs 64-bit app version: mem bnd %f\n",
wu.rsc_memory_bound
);
}
}
APP* app = ssp->lookup_app(wu.appid);
if (!app) {
log_messages.printf(MSG_CRITICAL,
"WU refers to nonexistent app: %lu\n", wu.appid
);
return NULL;
}
// if the app uses homogeneous app version,
// don't send to anonymous platform client.
// Then check if the WU is already committed to an app version
//
if (app->homogeneous_app_version) {
if (g_wreq->anonymous_platform) {
return NULL;
}
if ( wu.app_version_id) {
return check_homogeneous_app_version(wu, reliable_only);
}
}
// see if app is already in memoized array
//
std::vector<BEST_APP_VERSION*>::iterator bavi;
bavi = g_wreq->best_app_versions.begin();
while (bavi != g_wreq->best_app_versions.end()) {
bavp = *bavi;
if (bavp->appid == wu.appid && (job_needs_64b == bavp->for_64b_jobs)) {
if (!bavp->present) {
#if 0
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] returning cached NULL\n"
);
}
#endif
return NULL;
}
// if we're at the jobs-in-progress limit for this
// app and resource type, fall through and find another version
//
if (config.max_jobs_in_progress.exceeded(
app, bavp->host_usage.proc_type
)) {
if (config.debug_version_select) {
app_version_desc(*bavp, buf);
log_messages.printf(MSG_NORMAL,
"[version] %s: max jobs in progress exceeded\n", buf
);
}
g_wreq->best_app_versions.erase(bavi);
break;
}
// if we previously chose an app version but don't need more work
// for that processor type, fall through and find another version
//
if (check_req && g_wreq->rsc_spec_request) {
int pt = bavp->host_usage.proc_type;
if (!g_wreq->need_proc_type(pt)) {
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] have %s version but no more %s work needed\n",
proc_type_name(pt),
proc_type_name(pt)
);
}
g_wreq->best_app_versions.erase(bavi);
break;
}
}
if (wu.app_version_num) {
if (bavp->avp->version_num != wu.app_version_num) {
break;
}
}
// do this check again since we might have sent a job w/ this AV
//
if (daily_quota_exceeded(bavp->avp->id, bavp->host_usage)) {
break;
}
if (config.debug_version_select) {
app_version_desc(*bavp, buf);
log_messages.printf(MSG_NORMAL,
"[version] returning cached version: %s\n", buf
);
}
return bavp;
}
++bavi;
}
// here if app was not in memoized array,
// or we couldn't use the app version there.
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] looking for version of %s\n",
app->name
);
}
bavp = new BEST_APP_VERSION;
bavp->appid = wu.appid;
bavp->for_64b_jobs = job_needs_64b;
if (g_wreq->anonymous_platform) {
CLIENT_APP_VERSION* cavp = get_app_version_anonymous(
*app, job_needs_64b, reliable_only
);
if (!cavp) {
bavp->present = false;
} else {
bavp->present = true;
bavp->host_usage = cavp->host_usage;
bavp->cavp = cavp;
int gavid = host_usage_to_gavid(cavp->host_usage, *app);
bavp->reliable = app_version_is_reliable(gavid);
bavp->trusted = app_version_is_trusted(gavid);
if (config.debug_version_select) {
app_version_desc(*bavp, buf);
log_messages.printf(MSG_NORMAL, "[version] using %s\n", buf);
}
}
g_wreq->best_app_versions.push_back(bavp);
if (!bavp->present) return NULL;
return bavp;
}
// Go through the client's platforms,
// and scan the app versions for each platform.
// Pick the one with highest expected FLOPS
//
// if config.prefer_primary_platform is set:
// stop scanning platforms once we find a feasible version
bavp->host_usage.projected_flops = 0;
bavp->avp = NULL;
for (i=0; i<g_request->platforms.list.size(); i++) {
bool found_feasible_version = false;
PLATFORM* p = g_request->platforms.list[i];
if (job_needs_64b && !is_64b_platform(p->name)) {
continue;
}
for (j=0; j<ssp->napp_versions; j++) {
HOST_USAGE host_usage;
APP_VERSION& av = ssp->app_versions[j];
if (av.appid != wu.appid) continue;
if (av.platformid != p->id) continue;
if (wu.app_version_num) {
if (av.version_num != wu.app_version_num) {
continue;
}
} else {
if (av.deprecated) {
continue;
}
}
if (av.beta) {
if (!g_wreq->project_prefs.allow_beta_work) {
continue;
}
}
if (strlen(av.plan_class)) {
if (!app_plan(*g_request, av.plan_class, host_usage, &wu)) {
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] [AV#%lu] app_plan() returned false\n",
av.id
);
}
continue;
}
if (!g_request->client_cap_plan_class) {
if (!host_usage.is_sequential_app()) {
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] [AV#%lu] client %d lacks plan class capability\n",
av.id, g_request->core_client_version
);
}
continue;
}
}
} else {
host_usage.sequential_app(g_reply->host.p_fpops);
}
// skip versions that go against resource prefs
//
int pt = host_usage.proc_type;
if (g_wreq->project_prefs.dont_use_proc_type[pt]) {
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] [AV#%lu] Skipping %s version - user prefs say no %s\n",
av.id,
proc_type_name(pt),
proc_type_name(pt)
);
}
continue;
}
if (reliable_only && !app_version_is_reliable(av.id)) {
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] [AV#%lu] not reliable\n", av.id
);
}
continue;
}
if (daily_quota_exceeded(av.id, host_usage)) {
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] [AV#%lu] daily quota exceeded\n", av.id
);
}
continue;
}
// skip versions for which we're at the jobs-in-progress limit
//
if (config.max_jobs_in_progress.exceeded(app, host_usage.proc_type)) {
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] [AV#%lu] jobs in progress limit exceeded\n",
av.id
);
config.max_jobs_in_progress.print_log();
}
continue;
}
// skip versions for resources we don't need
//
if (check_req && !need_this_resource(host_usage, &av, NULL)) {
continue;
}
// skip versions which require a newer core client
//
if (g_request->core_client_version < av.min_core_version) {
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] [AV#%lu] client version %d < min core version %d\n",
av.id, g_request->core_client_version, av.min_core_version
);
}
// Do not tell the user he needs to update the client
// just because the client is too old for a particular app version
// g_wreq->outdated_client = true;
continue;
}
if (av.max_core_version && g_request->core_client_version > av.max_core_version) {
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] [AV#%lu] client version %d > max core version %d\n",
av.id, g_request->core_client_version, av.max_core_version
);
}
continue;
}
// at this point we know the version is feasible,
// so if config.prefer_primary_platform is set
// we won't look any further.
//
found_feasible_version = true;
// 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) {
// slowly move from raw calc to measured performance as number
// of results increases
//
n = std::max((long)havp->pfc.n, (long)n);
double old_projected_flops = host_usage.projected_flops;
estimate_flops(host_usage, av);
host_usage.projected_flops = (host_usage.projected_flops*(n-1) + old_projected_flops)/n;
// special case for versions that don't work on a given host.
// This is defined as:
// 1. pfc.n is 0
// 2. The max_jobs_per_day is 1
// 3. Consecutive valid is 0.
// In that case, heavily penalize this app_version most of the
// time.
//
if ((havp->pfc.n==0) && (havp->max_jobs_per_day==1) && (havp->consecutive_valid==0)) {
if (drand() > 0.01) {
host_usage.projected_flops *= 0.01;
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] App version AV#%lu is failing on HOST#%lu\n",
havp->app_version_id, havp->host_id
);
}
}
}
}
if (config.version_select_random_factor) {
r += config.version_select_random_factor*rand_normal()/n;
if (r <= .1) {
r = .1;
}
}
if (config.debug_version_select && bavp && bavp->avp) {
log_messages.printf(MSG_NORMAL,
"[version] Comparing AV#%lu (%.2f GFLOP) against AV#%lu (%.2f GFLOP)\n",
av.id, host_usage.projected_flops/1e+9,
bavp->avp->id, bavp->host_usage.projected_flops/1e+9
);
}
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#%lu] Random factor wins. r=%f n=%ld\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);
bavp->trusted = app_version_is_trusted(av.id);
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] Best app version is now AV%lu (%.2f GFLOP)\n",
bavp->avp->id, bavp->host_usage.projected_flops/1e+9
);
}
} else {
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] Not selected, AV#%lu r*%.2f GFLOP <= Best AV %.2f GFLOP (r=%f, n=%ld)\n",
av.id, host_usage.projected_flops/1e+9,
bavp->host_usage.projected_flops/1e+9, r, n
);
}
}
} // loop over app versions
if (config.prefer_primary_platform && found_feasible_version) {
break;
}
} // loop over client platforms
if (bavp->avp) {
estimate_flops(bavp->host_usage, *bavp->avp);
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] Best version of app %s is [AV#%lu] (%.2f GFLOPS)\n",
app->name, bavp->avp->id, bavp->host_usage.projected_flops/1e9
);
}
bavp->present = true;
g_wreq->best_app_versions.push_back(bavp);
} else {
// Here if there's no app version we can use.
//
if (config.debug_version_select) {
log_messages.printf(MSG_NORMAL,
"[version] returning NULL; platforms:\n"
);
for (i=0; i<g_request->platforms.list.size(); i++) {
PLATFORM* p = g_request->platforms.list[i];
log_messages.printf(MSG_NORMAL,
"[version] %s\n",
p->name
);
}
}
g_wreq->best_app_versions.push_back(bavp);
return NULL;
}
return bavp;
}
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