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[host] added multi-threaded memcopy for high resolutions

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Geoffrey McRae
2017-12-21 13:48:57 +11:00
parent a08aad8009
commit 43b096a5e7
8 changed files with 140 additions and 76 deletions
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70
host/MultiMemcpy.cpp Normal file
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/*
Looking Glass - KVM FrameRelay (KVMFR) Client
Copyright (C) 2017 Geoffrey McRae <geoff@hostfission.com>
https://looking-glass.hostfission.com
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "MultiMemcpy.h"
#include "Util.h"
#include "common/memcpySSE.h"
MultiMemcpy::MultiMemcpy()
{
for (int i = 0; i < MULTIMEMCPY_THREADS; ++i)
{
m_workers[i].start = CreateSemaphore(NULL, 0, 1, NULL);
m_workers[i].stop = CreateSemaphore(NULL, 0, 1, NULL);
m_semaphores[i] = m_workers[i].stop;
m_workers[i].thread = CreateThread(0, 0, WorkerFunction, &m_workers[i], 0, NULL);
}
}
MultiMemcpy::~MultiMemcpy()
{
for(int i = 0; i < MULTIMEMCPY_THREADS; ++i)
{
TerminateThread(m_workers[i].thread, 0);
CloseHandle(m_workers[i].start);
CloseHandle(m_workers[i].stop );
}
}
void MultiMemcpy::Copy(void * dst, void * src, size_t size)
{
const size_t block = size / MULTIMEMCPY_THREADS;
for (int i = 0; i < MULTIMEMCPY_THREADS; ++i)
{
m_workers[i].dst = (uint8_t *)dst + i * block;
m_workers[i].src = (uint8_t *)src + i * block;
m_workers[i].size = (i + 1) * block - i * block;
ReleaseSemaphore(m_workers[i].start, 1, NULL);
}
WaitForMultipleObjects(MULTIMEMCPY_THREADS, m_semaphores, TRUE, INFINITE);
}
DWORD WINAPI MultiMemcpy::WorkerFunction(LPVOID param)
{
struct Worker * w = (struct Worker *)param;
for(;;)
{
WaitForSingleObject(w->start, INFINITE);
memcpySSE(w->dst, w->src, w->size);
ReleaseSemaphore(w->stop, 1, NULL);
}
}