mirror of https://github.com/BOINC/boinc.git
458 lines
15 KiB
C++
458 lines
15 KiB
C++
// This file is part of BOINC.
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// http://boinc.berkeley.edu
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// Copyright (C) 2008 University of California
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//
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// BOINC is free software; you can redistribute it and/or modify it
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// under the terms of the GNU Lesser General Public License
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// as published by the Free Software Foundation,
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// either version 3 of the License, or (at your option) any later version.
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//
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// BOINC is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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// See the GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with BOINC. If not, see <http://www.gnu.org/licenses/>.
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// Simulate the processing of the current workload
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// (include jobs that are downloading)
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// with weighted round-robin (WRR) scheduling.
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//
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// For efficiency, we simulate an approximation of WRR.
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// We don't model time-slicing.
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// Instead we use a continuous model where, at a given point,
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// each project has a set of running jobs that uses at most all CPUs.
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// These jobs are assumed to run at a rate proportionate to their avg_ncpus,
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// and each project gets total CPU proportionate to its RRS.
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//
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// For coprocessors, we saturate the resource;
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// i.e. with 2 GPUs, we'd let a 1-GPU app and a 2-GPU app run together.
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// Otherwise, there'd be the possibility of computing
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// a nonzero shortfall inappropriately.
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//
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// Outputs are changes to global state:
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// - deadline misses (per-project count, per-result flag)
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// Deadline misses are not counted for tasks
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// that are too large to run in RAM right now.
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// - resource shortfalls (per-project and total)
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// - counts of resources idle now
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//
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#include "cpp.h"
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#ifdef _WIN32
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#include "boinc_win.h"
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#else
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#include "config.h"
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#endif
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#include "client_state.h"
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#include "coproc.h"
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#include "client_msgs.h"
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inline void rsc_string(RESULT* rp, char* buf) {
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APP_VERSION* avp = rp->avp;
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if (avp->gpu_usage.rsc_type) {
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sprintf(buf, "%.2f CPU + %.2f %s",
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avp->avg_ncpus, avp->gpu_usage.usage,
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rsc_name(avp->gpu_usage.rsc_type)
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);
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} else {
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sprintf(buf, "%.2f CPU", avp->avg_ncpus);
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}
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}
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// this is here (rather than rr_sim.h) because its inline functions
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// refer to RESULT
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//
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struct RR_SIM_STATUS {
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std::vector<RESULT*> active;
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double active_rsc[MAX_RSC];
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inline void activate(RESULT* rp, double when) {
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PROJECT* p = rp->project;
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if (log_flags.rr_simulation) {
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char buf[256];
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rsc_string(rp, buf);
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msg_printf(p, MSG_INFO,
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"[rr_sim] %.2f: starting %s (%s)",
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when, rp->name, buf
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);
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}
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active.push_back(rp);
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rsc_work_fetch[0].sim_nused += rp->avp->avg_ncpus;
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int rt = rp->avp->gpu_usage.rsc_type;
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if (rt) {
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rsc_work_fetch[rt].sim_nused += rp->avp->gpu_usage.usage;
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}
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}
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// remove *rpbest from active set,
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// and adjust FLOPS left for other results
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//
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inline void remove_active(RESULT* rpbest) {
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vector<RESULT*>::iterator it = active.begin();
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while (it != active.end()) {
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RESULT* rp = *it;
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if (rp == rpbest) {
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it = active.erase(it);
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} else {
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rp->rrsim_flops_left -= rp->rrsim_flops*rpbest->rrsim_finish_delay;
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// can be slightly less than 0 due to roundoff
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//
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if (rp->rrsim_flops_left < -1) {
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msg_printf(rp->project, MSG_INTERNAL_ERROR,
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"%s: negative FLOPs left %f", rp->name, rp->rrsim_flops_left
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);
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}
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if (rp->rrsim_flops_left < 0) {
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rp->rrsim_flops_left = 0;
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}
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it++;
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}
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}
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rsc_work_fetch[0].sim_nused -= rpbest->avp->avg_ncpus;
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int rt = rpbest->avp->gpu_usage.rsc_type;
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if (rt) {
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rsc_work_fetch[rt].sim_nused -= rpbest->avp->gpu_usage.usage;
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}
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}
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RR_SIM_STATUS() {
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for (int i=0; i<coprocs.n_rsc; i++) {
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active_rsc[i] = 0;
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}
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}
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~RR_SIM_STATUS() {}
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// compute shares of projects with active CPU jobs
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//
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inline void get_cpu_shares() {
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unsigned int i;
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for (i=0; i<gstate.projects.size(); i++) {
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gstate.projects[i]->rr_sim_cpu_share = 0;
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}
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for (i=0; i<active.size(); i++) {
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PROJECT* p = active[i]->project;
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p->rr_sim_cpu_share = p->resource_share;
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}
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double sum=0;
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for (i=0; i<gstate.projects.size(); i++) {
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sum += gstate.projects[i]->rr_sim_cpu_share;
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}
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if (!sum) sum=1;
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for (i=0; i<gstate.projects.size(); i++) {
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gstate.projects[i]->rr_sim_cpu_share /= sum;
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}
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}
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};
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void RR_SIM_PROJECT_STATUS::activate(RESULT* rp) {
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active.push_back(rp);
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rp->project->rsc_pwf[0].sim_nused += rp->avp->avg_ncpus;
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int rt = rp->avp->gpu_usage.rsc_type;
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if (rt) {
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rp->project->rsc_pwf[rt].sim_nused += rp->avp->gpu_usage.usage;
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}
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}
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void RR_SIM_PROJECT_STATUS::remove_active(RESULT* rp) {
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std::vector<RESULT*>::iterator it = active.begin();
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while (it != active.end()) {
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if (*it == rp) {
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it = active.erase(it);
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} else {
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it++;
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}
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}
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rp->project->rsc_pwf[0].sim_nused -= rp->avp->avg_ncpus;
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int rt = rp->avp->gpu_usage.rsc_type;
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if (rt) {
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rp->project->rsc_pwf[rt].sim_nused -= rp->avp->gpu_usage.usage;
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}
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}
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// estimate the rate (FLOPS) that this job will get long-term
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// with weighted round-robin scheduling
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//
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void set_rrsim_flops(RESULT* rp) {
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// For coproc jobs, use app version estimate
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//
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if (rp->uses_coprocs()) {
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rp->rrsim_flops = rp->avp->flops * gstate.overall_gpu_frac();
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return;
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}
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PROJECT* p = rp->project;
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// For CPU jobs, estimate how many CPU seconds per second this job would get
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// running with other jobs of this project, ignoring other factors
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//
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double x = 1;
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if (p->rsc_pwf[0].sim_nused > gstate.ncpus) {
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x = gstate.ncpus/p->rsc_pwf[0].sim_nused;
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}
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double r1 = x*rp->avp->avg_ncpus;
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// if the project's total CPU usage is more than its share, scale
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//
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double share_cpus = p->rr_sim_cpu_share*gstate.ncpus;
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if (!share_cpus) share_cpus = gstate.ncpus;
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// deal with projects w/ resource share = 0
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double r2 = r1;
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if (p->rsc_pwf[0].sim_nused > share_cpus) {
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r2 *= (share_cpus / p->rsc_pwf[0].sim_nused);
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}
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// scale by overall CPU availability
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//
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double r3 = r2 * gstate.overall_cpu_frac();
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rp->rrsim_flops = r3 * rp->avp->flops;
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#if 0
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if (log_flags.rr_simulation) {
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msg_printf(p, MSG_INFO,
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"[rr_sim] set_rrsim_flops: %.2fG (r1 %.4f r2 %.4f r3 %.4f)",
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rp->rrsim_flops/1e9, r1, r2, r3
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);
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}
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#endif
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}
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void CLIENT_STATE::print_deadline_misses() {
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unsigned int i;
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RESULT* rp;
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PROJECT* p;
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for (i=0; i<results.size(); i++){
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rp = results[i];
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if (rp->rr_sim_misses_deadline) {
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msg_printf(rp->project, MSG_INFO,
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"[cpu_sched] Result %s projected to miss deadline.",
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rp->name
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);
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}
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}
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for (i=0; i<projects.size(); i++) {
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p = projects[i];
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for (int j=0; j<coprocs.n_rsc; j++) {
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if (p->rsc_pwf[i].deadlines_missed) {
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msg_printf(p, MSG_INFO,
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"[cpu_sched] Project has %d projected %s deadline misses",
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p->rsc_pwf[i].deadlines_missed,
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rsc_name(i)
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);
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}
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}
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}
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}
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void CLIENT_STATE::rr_simulation() {
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PROJECT* p, *pbest;
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RESULT* rp, *rpbest;
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RR_SIM_STATUS sim_status;
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unsigned int u;
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double ar = available_ram();
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work_fetch.rr_init();
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if (log_flags.rr_simulation) {
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msg_printf(0, MSG_INFO,
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"[rr_sim] start: work_buf min %.0f additional %.0f total %.0f on_frac %.3f active_frac %.3f",
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work_buf_min(), work_buf_additional(), work_buf_total(),
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time_stats.on_frac, time_stats.active_frac
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);
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}
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for (u=0; u<projects.size(); u++) {
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p = projects[u];
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if (p->non_cpu_intensive) continue;
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p->rr_sim_status.clear();
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}
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// Decide what jobs to include in the simulation,
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// and pick the ones that are initially running.
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// NOTE: "results" is sorted by increasing arrival time
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//
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for (u=0; u<results.size(); u++) {
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rp = results[u];
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rp->rr_sim_misses_deadline = false;
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if (!rp->nearly_runnable()) continue;
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if (rp->some_download_stalled()) continue;
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if (rp->project->non_cpu_intensive) continue;
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rp->rrsim_flops_left = rp->estimated_flops_remaining();
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//if (rp->rrsim_flops_left <= 0) continue;
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// job may have fraction_done=1 but not be done;
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// if it's past its deadline, we need to mark it as such
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p = rp->project;
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p->pwf.has_runnable_jobs = true;
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p->rsc_pwf[0].nused_total += rp->avp->avg_ncpus;
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int rt = rp->avp->gpu_usage.rsc_type;
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if (rt) {
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p->rsc_pwf[rt].nused_total += rp->avp->gpu_usage.usage;
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p->rsc_pwf[rt].has_runnable_jobs = true;
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if (rsc_work_fetch[rt].sim_nused < coprocs.coprocs[rt].count) {
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sim_status.activate(rp, 0);
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p->rr_sim_status.activate(rp);
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} else {
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rsc_work_fetch[rt].pending.push_back(rp);
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}
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} else {
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p->rsc_pwf[0].has_runnable_jobs = true;
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if (p->rsc_pwf[0].sim_nused < ncpus) {
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sim_status.activate(rp, 0);
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p->rr_sim_status.activate(rp);
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} else {
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p->rr_sim_status.add_pending(rp);
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}
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}
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}
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// note the number of idle instances
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//
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rsc_work_fetch[0].nidle_now = ncpus - rsc_work_fetch[0].sim_nused;
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if (rsc_work_fetch[0].nidle_now < 0) rsc_work_fetch[0].nidle_now = 0;
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for (int i=1; i<coprocs.n_rsc; i++) {
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rsc_work_fetch[i].nidle_now = coprocs.coprocs[i].count - rsc_work_fetch[i].sim_nused;
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if (rsc_work_fetch[i].nidle_now < 0) rsc_work_fetch[i].nidle_now = 0;
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}
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// Simulation loop. Keep going until all work done
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//
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double buf_end = now + work_buf_total();
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double sim_now = now;
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while (sim_status.active.size()) {
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sim_status.get_cpu_shares();
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// compute finish times and see which result finishes first
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//
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rpbest = NULL;
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for (u=0; u<sim_status.active.size(); u++) {
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rp = sim_status.active[u];
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set_rrsim_flops(rp);
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//rp->rrsim_finish_delay = rp->avp->temp_dcf*rp->rrsim_flops_left/rp->rrsim_flops;
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rp->rrsim_finish_delay = rp->rrsim_flops_left/rp->rrsim_flops;
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if (!rpbest || rp->rrsim_finish_delay < rpbest->rrsim_finish_delay) {
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rpbest = rp;
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}
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}
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pbest = rpbest->project;
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if (log_flags.rr_simulation) {
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msg_printf(pbest, MSG_INFO,
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"[rr_sim] %.2f: %s finishes after %.2f (%.2fG/%.2fG)",
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sim_now - now,
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rpbest->name, rpbest->rrsim_finish_delay,
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rpbest->rrsim_flops_left/1e9, rpbest->rrsim_flops/1e9
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);
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}
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// "rpbest" is first result to finish. Does it miss its deadline?
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//
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double diff = (sim_now + rpbest->rrsim_finish_delay) - rpbest->computation_deadline();
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if (diff > 0) {
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ACTIVE_TASK* atp = lookup_active_task_by_result(rpbest);
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if (atp) {
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atp->last_deadline_miss_time = now;
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}
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if (atp && atp->procinfo.working_set_size_smoothed > ar) {
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if (log_flags.rr_simulation) {
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msg_printf(pbest, MSG_INFO,
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"[rr_sim] %s misses deadline but too large to run",
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rpbest->name
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);
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}
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} else {
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rpbest->rr_sim_misses_deadline = true;
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int rt = rpbest->avp->gpu_usage.rsc_type;
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if (rt) {
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pbest->rsc_pwf[rt].deadlines_missed++;
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rsc_work_fetch[rt].deadline_missed_instances += rpbest->avp->gpu_usage.usage;
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} else {
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pbest->rsc_pwf[0].deadlines_missed++;
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rsc_work_fetch[0].deadline_missed_instances += rpbest->avp->avg_ncpus;
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}
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if (log_flags.rr_simulation) {
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msg_printf(pbest, MSG_INFO,
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"[rr_sim] %s misses deadline by %.2f",
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rpbest->name, diff
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);
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}
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}
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}
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// update saturated time
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//
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double end_time = sim_now + rpbest->rrsim_finish_delay;
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double x = end_time - gstate.now;
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for (int i=0; i<coprocs.n_rsc; i++) {
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rsc_work_fetch[i].update_saturated_time(x);
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}
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// update busy time
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//
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if (rpbest->rr_sim_misses_deadline) {
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double frac = rpbest->uses_coprocs()?gstate.overall_gpu_frac():gstate.overall_cpu_frac();
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double dur = rpbest->estimated_time_remaining() / frac;
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rsc_work_fetch[0].update_busy_time(dur, rpbest->avp->avg_ncpus);
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int rt = rpbest->avp->gpu_usage.rsc_type;
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if (rt) {
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rsc_work_fetch[rt].update_busy_time(dur, rpbest->avp->gpu_usage.usage);
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}
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}
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// increment resource shortfalls
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//
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if (sim_now < buf_end) {
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if (end_time > buf_end) end_time = buf_end;
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double d_time = end_time - sim_now;
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for (int i=0; i<coprocs.n_rsc; i++) {
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rsc_work_fetch[i].accumulate_shortfall(d_time);
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}
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}
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sim_status.remove_active(rpbest);
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pbest->rr_sim_status.remove_active(rpbest);
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sim_now += rpbest->rrsim_finish_delay;
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// start new jobs; may need to start more than one
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// if this job used multiple resource instances
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//
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int rt = rpbest->avp->gpu_usage.rsc_type;
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if (rt) {
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while (1) {
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if (rsc_work_fetch[rt].sim_nused >= coprocs.coprocs[rt].count) break;
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if (!rsc_work_fetch[rt].pending.size()) break;
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rp = rsc_work_fetch[rt].pending[0];
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rsc_work_fetch[rt].pending.erase(rsc_work_fetch[rt].pending.begin());
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sim_status.activate(rp, sim_now-now);
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pbest->rr_sim_status.activate(rp);
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}
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} else {
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while (1) {
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if (pbest->rsc_pwf[0].sim_nused >= ncpus) break;
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rp = pbest->rr_sim_status.get_pending();
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if (!rp) break;
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sim_status.activate(rp, sim_now-now);
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pbest->rr_sim_status.activate(rp);
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}
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}
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}
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// if simulation ends before end of buffer, take the tail into account
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//
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if (sim_now < buf_end) {
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double d_time = buf_end - sim_now;
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for (int i=0; i<coprocs.n_rsc; i++) {
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rsc_work_fetch[i].accumulate_shortfall(d_time);
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}
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}
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}
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