Re: using syscalls in perl through inline c

[afoken]

My problem is I want to use the getdents() syscall from perl to receive a file list

Use readdir. Long form of this posting.

See using Linux getdents syscall and failing to use getdents system call on Linux for other futile attempts.

Alexander

[ofer]

the reason behind using inline c is speed readdir is not fast enough to read millions of files.

[stevieb]

Have you compared the C code to pure Perl code? Most often, it's the I/O of the disk subsystems that are the bottleneck, not the code itself.

I'm not saying that's absolute in all cases, but it may be prudent to do a one-off test between the two before making any decisions.

[glasswalk3r]

See using Linux getdents syscall and failing to use getdents system call on Linux for other futile attempts.

No, it is not futile. See Linux::NFS::BigDir.

It's harder to solve that way, but performance difference on the specific case I tested (large directories over NFS version 3) by using readdir and going down to the getdents can be measured in hours.

It might be a problem with the NFS server configuration? Yes, but I didn't have time to search for it or even root access to attempt.