Date: Fri, 07 Dec 2007 14:22:22 +0100 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-fs@freebsd.org Subject: Re: readv: parallel or sequential? Message-ID: <fjbh4h$f5s$1@ger.gmane.org> In-Reply-To: <868x46u0lz.fsf@ds4.des.no> References: <fjbb3v$n60$1@ger.gmane.org> <ad79ad6b0712070347s4a5d5bb2rc7adfdc54b107dac@mail.gmail.com> <868x46u0lz.fsf@ds4.des.no>
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[-- Attachment #1 --] Dag-Erling Smørgrav wrote: > But to return to what Ivan was asking, I think what the man page is > trying to say is that you can't use readv() to e.g. read individual > network packets into separate buffers (unless each packet just happens > to fit exactly within each buffer). What about streaming protocols like TCP? If, for example, I know I have a N-byte header, N2-byte body, couldn't readv handle it with two iovecs? But that's not why I started the discussion. I'm looking for a way to do "scattered" async IO on files (the intention: feed an array of offsets, lengths and buffers into the kernel, let it perform the requests in parallel, if it can) and started with this man page. [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4-svn0 (GNU/Linux) iD8DBQFHWUkkldnAQVacBcgRAii1AKCZZHwHUcbv0Ofl55O3TTmmJFG4zQCg1fNb becsoQeragiV7qhZn2M/dfk= =xFh/ -----END PGP SIGNATURE-----help
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