Depends. In general, you couldn’t physically copy anything larger than the largest usable register in a single cycle, but that’s not really how machines work these days. In practice, you really care less about what the CPU is doing and more about the characteristics of DRAM. The memory hierarchy of the machine is going to … Read more
I’ve had performance issues concatenating a large number of DataFrames to a ‘growing’ DataFrame. My workaround was appending all sub DataFrames to a list, and then concatenating the list of DataFrames once processing of the sub DataFrames has been completed.
Memory Fragmentation When a Linux system has been running for a while memory fragmentation can increase which depends heavily on the nature of the applications that are running on it. The more processes allocate and free memory, the quicker memory becomes fragmented. And the kernel may not always be able to defragment enough memory for … Read more
Sadly these things rely heavily on the underlying OS, so there are no platform-independent calls. (Maybe there are some wrapper frameworks, but I don’t know of any.) On Linux you could have a look at the getrusage() function call, on Windows you can use GetProcessMemoryInfo() for RAM Usage. Have also a look at the other … Read more
On Linux, you can use the function sysinfo which sets values in the following struct: #include <sys/sysinfo.h> int sysinfo(struct sysinfo *info); struct sysinfo { long uptime; /* Seconds since boot */ unsigned long loads[3]; /* 1, 5, and 15 minute load averages */ unsigned long totalram; /* Total usable main memory size */ unsigned long … Read more
ImDisk is a RAM disk app that creates a virtual drive from a sector of memory, and has an API that can be called from .NET. class RamDisk { public const string MountPoint = “X:”; public void createRamDisk() { try { string initializeDisk = “imdisk -a “; string imdiskSize = “-s 1024M “; string mountPoint … Read more
I see similar questions to this asked frequently and I have yet to see a satisfactory answer. The answers I see most frequently are angry “why do you care?” answers. Some people put a lot of thought and effort into making the question and whoever asks it seem stupid. Some people will answer this question … Read more