mirror of https://github.com/BOINC/boinc.git
81 lines
2.4 KiB
C
81 lines
2.4 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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#include "boinc_db.h"
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#include "sched_types.h"
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// this keeps track of the project's lowest and highest requirements
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// for a GPU type, so that we can send users an appropriate message
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//
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struct GPU_REQUIREMENTS {
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double min_ram;
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double opt_ram;
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int min_driver_version;
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int opt_driver_version;
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void clear() {
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min_ram = opt_ram = 0;
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min_driver_version = opt_driver_version = 0;
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}
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void update(int version, double ram) {
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if (min_driver_version) {
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if (version < min_driver_version) {
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min_driver_version = version;
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}
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} else {
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min_driver_version = version;
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}
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if (version > opt_driver_version) {
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opt_driver_version = version;
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}
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if (min_ram) {
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if (ram < min_ram) {
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min_ram = ram;
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}
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} else {
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min_ram = ram;
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}
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if (ram > opt_ram) {
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opt_ram = ram;
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}
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}
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};
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extern GPU_REQUIREMENTS gpu_requirements[NPROC_TYPES];
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extern bool wu_is_infeasible_custom(WORKUNIT&, APP&, BEST_APP_VERSION&);
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extern bool app_plan(SCHEDULER_REQUEST&, char* plan_class, HOST_USAGE&);
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extern void handle_file_xfer_results();
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// Suppose we have a computation that uses two devices alternately.
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// The devices have speeds s1 and s2.
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// The fraction of work done on device 1 is frac.
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//
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// This function returns:
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// 1) the overall speed
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// 2) the utilization of device 1, which is always in (0, 1).
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//
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static inline void coproc_perf(
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double s1, double s2, double frac,
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double& speed, double& u1
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) {
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double y = (frac*s2 + (1-frac)*s1);
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speed = s1*s2/y;
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// do the math
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u1 = frac*s2/y;
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}
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