Windows 7 SP1 AiO HP And COMPAQ X86x64 Torrent
Berry Hootsell
Microsoft has ported Windows to ARM but then artificially crippled the resulting systems in various ways. With windows RT (the ARM version of Windows 8) the system was pretty much complete, but third-party desktop apps were locked out. With the various ARM variants of Windows 10 the desktop seems to be gone completely.
The problems with balena etcher are really frustrating, especially for new beginners!
I tried WIN32Disklmager and it works perfect, right from the beginning. Use it for Raspberry OS
Systems and Volumio. No more problems with Micro SD Cards or usb-sticks (on windows PC).
Thing is, given the same code same optimization flags, intel fortran behaves the same for all the OS.
gfortran on windows is 6 times slower than on Ubuntu.
The time are just the running time. The compilation time is excluded.
Speaking of IO, in fact, it reminds me that, I do notice in windows the file system like NTFS is significantly slower than the linux file system.
It looks like the same NVME SSD can have much higher actual IOPS on linux than on windows.
I guess someone else may have the same experience on windows. That is, even if I use things like RamDisk to do some IO using ram, the speed is almost the same as I do the IO using my SSD.
Such as installing the same MikTex in RamDisk and in SSD, the installation time are almost the same, and I compiling latex files in RamDisk, and on SSD, the time is still the same. I was expecting that if I compile latex files in Ramdisk, the speed will be as fast as hell. But I was wrong, there is no performance gain than running latex on SSD.
The file system of windows is the limitation, not the hardware.
I am developing a package in Fortran and I hope it can be used on Win/Linux/Mac. Letting the user installing gfortran and Make on windows is a very convenient choice. Otherwise user need install Intel OneAPI which is also great but does not really optimize for Apple M1.
So I think if gfortran works fine on Win/Linux/Mac, it can be great.
But the issue of gfortran I have met on windows is that its performance is several times slower than on Linux.
Also, gfortran/gcc seems still some compatibility issue with M1 chip. For example, if use a pointer to point to a function/subroutine, gfortran seems can only work with -Og flag. With more than that optimization it will cause some error on M1 chip.
I see you use cygwin64 on windows 10, and that gfortran cost 0.79s, that is about right.
I wonder how did you achieve that?
I mean I installed cygwin64 and installed gfortran 11.2.0 there, then I compile and run my code there, but I still get slow speed like 2.9s,
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Thank you for your suggestions of optimization. Eh, the integer 8 does not really matter I believe, on modern hardware.
On windows and ubuntu, no matter integer 4 or 8, Intel fortran gives the same speed 0.5s.
gfortran on Ubuntu also gives about 0.6s no matter integer 4 or 8, which is decent enough.
It is an illustration code and optimization is not very important but thank you very much all the same, I highly appreciate it!