mmap

相关标签：javascript jquery android 多少钱 iPhone

What is a good way to test the use of msync on recent Linux kernels?

I am using msync in my application on Linux 2.6 to ensure consistency in the event of a crash. I need to thoroughly test my usage of msync but the implementation seems to be flushing all the relevant[详细]

2023-03-18 04:53 分类：问答
Race condition with Python mmap and multiprocessing.semaphore

I am writing a script that processes some mmaps concurrently with multiprocessing.Process and updates a result list stored in an mmap and locked with a mutex.[详细]

2023-03-17 13:48 分类：问答
Using mmap with popen

I need to read in and process a bunch of ~40mb gzipped text files, and I need it done f开发者_高级运维ast and with minimal i/o overhead (as the volumes are used by others as well). The fastest way I\'[详细]

2023-03-15 20:05 分类：问答
How to write mmap input memory to O_DIRECT output file?

why doesn\'t following pseudo-code work (O_DIRECT results in EFAULT) in_fd = open(\"/dev/mem\"); in_mmap = mmap(in_fd);[详细]

2023-03-14 22:22 分类：问答
vmsplice() and TCP

In the original vmsplice() implementation, it was suggested that if you had a user-land buffer 2x the maximum number of pages that could fit in a pipe, a successful vmsplice() on the second half of th[详细]

2023-03-14 03:16 分类：问答
Unmap of NumPy memmap

I can\'t find any documentation on how numpy handles unmapping of previously memory mapped regions: munmap for num开发者_运维百科py.memmap() and numpy.load(mmap_mode).[详细]

2023-03-13 17:44 分类：问答
Python mmap 'Permission denied' on Linux

I have a really large file I\'m trying to open with mmap and its giving me permission denied.I\'ve tried different flags and modes to the os.open but its just not working for me.[详细]

2023-03-11 19:45 分类：问答
Segmentation fault after mmap()

I wanna share a pointer of map during 2 processes. So I tried mmap. I tested mmap in a single process. Here is my code:[详细]

2023-03-07 19:22 分类：问答
Why is sequentially reading a large file row by row with mmap and madvise sequential slower than fgets?

Overview I have aprogram bounded significantly by IO and am trying to speed it up. Using mmap seemed to be a good idea, but it actually degrades the performance relative to just using a series of fge[详细]

2023-03-06 19:10 分类：问答
Purging numpy.memmap

Given a numpy.memmap object created with mode=\'r\' (i.e. read-only), is there a way to force it to purge all loaded pages out of physical RAM, without deleting the object itself?[详细]

2023-03-06 02:23 分类：问答