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56 lines
1.4 KiB
C++
56 lines
1.4 KiB
C++
/*
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* ThreadQueues.cpp
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*
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*/
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#include "ThreadQueues.h"
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#include <assert.h>
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int ThreadQueues::distribute(ThreadJob job, int n_items, int base,
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int granularity)
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{
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find_available();
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return distribute_no_setup(job, n_items, base, granularity);
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}
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int ThreadQueues::find_available()
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{
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available.clear();
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for (size_t i = 1; i < size(); i++)
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if (at(i)->available())
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available.push_back(i);
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#ifdef VERBOSE_QUEUES
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cerr << "Using " << available.size() << " threads" << endl;
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#endif
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return available.size();
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}
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int ThreadQueues::get_n_per_thread(int n_items, int granularity)
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{
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int n_per_thread = n_items / (available.size() + 1) / granularity
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* granularity;
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return n_per_thread;
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}
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int ThreadQueues::distribute_no_setup(ThreadJob job, int n_items, int base,
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int granularity, const vector<void*>* supplies)
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{
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int n_per_thread = get_n_per_thread(n_items, granularity);
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for (size_t i = 0; i < available.size(); i++)
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{
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if (supplies)
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job.supply = supplies->at(i);
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job.begin = base + i * n_per_thread;
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job.end = base + (i + 1) * n_per_thread;
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at(available[i])->schedule(job);
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}
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return base + available.size() * n_per_thread;
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}
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void ThreadQueues::wrap_up(ThreadJob job)
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{
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for (int i : available)
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assert(at(i)->result().output == job.output);
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}
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