Messages in this thread | | | From | Roy Sigurd Karlsbakk <> | Subject | Re: O_DIRECT sockets? (was [RESEND] tuning linux for high network performance?) | Date | Thu, 24 Oct 2002 12:14:59 +0200 |
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> Hmm, I'm still not clear on why you cannot use sendfile()? > I was not aware of any upper limit to the file size in order > for sendfile() to be used? From what little I know, this > is exactly the kind of situation that sendfile was intended > to benefit.
I can't use sendfile(). I'm working with files > 4GB, and from man 2 sendfile:
ssize_t sendfile(int out_fd, int in_fd, off_t *offset, size_t count);
int main() { ssize_t s1; off_t offset; size_t count;
printf("sizeof ssize_t: %d\n", sizeof s1); printf("sizeof size_t: %d\n", sizeof count); printf("sizeof off_t: %d\n", sizeof offset); return 0; }
running it
$ ./sendfile_test sizeof ssize_t: 4 sizeof size_t: 4 sizeof off_t: 4 $
as far as I'm concerned, this will not allow me to address files past the 4GB limit (or was it 2?)
roy
-- Roy Sigurd Karlsbakk, Datavaktmester ProntoTV AS - http://www.pronto.tv/ Tel: +47 9801 3356
Computers are like air conditioners. They stop working when you open Windows.
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