Date: Fri, 07 Dec 2007 12:39:56 +0100 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-fs@freebsd.org Subject: readv: parallel or sequential? Message-ID: <fjbb3v$n60$1@ger.gmane.org>
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Hi,
I found this in readv(2):
For readv() and preadv(), the iovec structure is defined as:
struct iovec {
void *iov_base; /* Base address. */
size_t iov_len; /* Length. */
};
Each iovec entry specifies the base address and length of an area
in mem-
ory where data should be placed. The readv() system call will alway=
s
fill an area completely before proceeding to the next.
Does this mean that, in effect, readv() is just a loop of read() calls
(minus syscall overhead)?
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