tangchao0503/ximeaAirborneSystem
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内存映射mremap在320G时会失败，改为用fwrite，经测试980PRO 2个bin1 采集80分钟不会丢帧；

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tangchao0503
2023-07-14 16:33:37 +08:00
parent 6d6b662cec
commit 1476c2bc15
1 changed files with 3 additions and 78 deletions
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81
Source_Files/ximeaimager.cpp
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@ -938,29 +938,9 @@ WriteData2Disk::WriteData2Disk()
void WriteData2Disk::write2Disk()
{
QString imageFileName=m_QbaseFileName+".bil";
// FILE *hFile=fopen(imageFileName.toStdString().c_str(),"w+b");
FILE *hFile=fopen(imageFileName.toStdString().c_str(),"w+b");
int fd = open(imageFileName.toStdString().c_str(), O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);
size_t fileSize = m_iFrameSizeInByte*(size_t)100*(size_t)60*(size_t)5;
size_t fileSizeIncrement = m_iFrameSizeInByte*(size_t)100*(size_t)60*(size_t)5;
if (lseek(fd, fileSize - 1, SEEK_SET) == -1) {
std::cerr << "Error calling lseek()\n";
return;
}
if (write(fd, "", 1) == -1) {
std::cerr << "Error writing last byte of the file\n";
return;
}
void* addr = mmap(nullptr, fileSize, PROT_WRITE, MAP_SHARED, fd, 0);
if (addr == MAP_FAILED) {
std::cerr << "Error mmapping the file\n";
return;
}
size_t sizeWrited2disk = 0;
int frameCounter = 0;
int frameNumber;
unsigned short * dataBuffer = new unsigned short[m_iFrameSizeInByte/2*m_iNumber_WriteDisk];
@ -1002,71 +982,16 @@ void WriteData2Disk::write2Disk()
// std::cout<<"WriteData2Disk::write2Disk-----------------------正在写磁盘!" << m_pool->max_size() <<std::endl;//
fwrite(dataBuffer,1,m_iFrameSizeInByte*frameNumber, hFile);
if (fileSize < sizeWrited2disk + m_iFrameSizeInByte*frameNumber)
{
// if (munmap(addr, fileSize) == -1) {
// std::cerr << "Error un-mmapping the file\n";
// }
// std::cout<<"老fileSize：" << fileSize <<std::endl;
size_t new_size = fileSize + fileSizeIncrement;
if (ftruncate(fd, new_size) == -1) {
std::cerr << "Error calling ftruncate()\n";
return;
}
// Remap the file with the new size
addr = mremap(addr, fileSize, new_size, MREMAP_MAYMOVE);
if (addr == MAP_FAILED) {
std::cerr << "Error calling mremap()\n";
return;
}
fileSize = new_size;
// std::cout<<"新fileSize：" << fileSize <<std::endl;
}
// fwrite(dataBuffer,1,m_iFrameSizeInByte*frameNumber, hFile);
memcpy(addr + sizeWrited2disk, dataBuffer, m_iFrameSizeInByte*frameNumber);
sizeWrited2disk = sizeWrited2disk + m_iFrameSizeInByte*frameNumber;
// std::cout<<"sizeWrited2disk：" << sizeWrited2disk <<std::endl;
frameCounter++;
}
m_rgbImage->m_VideoWriter.release();
// fclose(hFile);
fclose(hFile);
delete[] dataBuffer;
// if (munmap(addr, fileSize) == -1) {
// std::cerr << "Error un-mmapping the file\n";
// }
// Resize the file to 4096 bytes
if (ftruncate(fd, sizeWrited2disk) == -1) {
std::cerr << "Error calling ftruncate()\n";
return;
}
// Remap the file with the new size
addr = mremap(addr, fileSize, sizeWrited2disk, MREMAP_MAYMOVE);
if (addr == MAP_FAILED) {
std::cerr << "Error calling mremap()\n";
return;
}
if (munmap(addr, sizeWrited2disk) == -1) {
std::cerr << "Error un-mmapping the file\n";
}
close(fd);
std::cout<<"WriteData2Disk::write2Disk-----------------------写磁盘线程将退出，内存池可达到的最多元素数：" << m_pool->max_size() <<std::endl;
std::cout<<"WriteData2Disk::write2Disk-----------------------写磁盘线程将退出，fwrite 调用次数：" << frameCounter <<std::endl;
}