PosixFdInputStreamBuffer(
::libmaus::aio::PosixFdInput & rstream,
int64_t const rblocksize,
uint64_t const rputbackspace = 0
)
:
stream(rstream),
optblocksize(getOptimalBlockSize()),
filesize(stream.sizeChecked()),
blocksize((rblocksize < 0) ? optblocksize : rblocksize),
putbackspace(rputbackspace),
buffer(putbackspace + blocksize,false),
symsread(0)
{
init(false);
}
void KernelScheduler::moldKernelLaunchConfigForMaximumOccupancy(boost::shared_ptr<AbstractElasticKernel> kernel) {
size_t newBlockSize = getOptimalBlockSize(kernel); // get the optimal block size
LaunchParameters parameters = kernel.get()->getLaunchParams();
size_t totalThreads = parameters.getNumTotalThreads();
// make sure we ahve the same amount of threads overall, by decreasing the block size
size_t newBlockNum = totalThreads / newBlockSize;
if (totalThreads % newBlockSize) {
++newBlockNum;
}
//set the new configuration
kernel.get()->setLaunchParams(LaunchParameters(newBlockSize, newBlockNum));
}