mmap Questions

Redis – Using the same variable between different Python Runs

September 21, 2023
DANIAL
2 Answers

I have a script like this for epoch in range(num_epochs): for bag in range(num_bags): feats = pd.read_csv(f"feats_{bag}.csv") ... # some logic As you can see, it repetitively reads data from a set of files. Each "feats_{bag}.csv" file is repetitively being…

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Debian – mmaping huge file as read-only fails with ENOMEM

June 18, 2023
cmpxchg8b
2 Answers

I am running the following (minimal reproducing) code: #include <stdio.h> #include <sys/mman.h> #include <stdlib.h> #include <sys/stat.h> #include <fcntl.h> #include <unistd.h> #include <errno.h> void main() { int fd = open("file.data", O_RDONLY); void* ptr = mmap(0, (size_t)240 * 1024 * 1024 *…

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