From: Eric Wong <normalperson@yhbt.net>
To: ruby.io.splice@librelist.com
Subject: [ANN] io_splice 3.0.0 - kinder, gentler Linux zero-copy
Date: Tue, 1 Mar 2011 09:42:03 +0000 [thread overview]
Message-ID: <20110301094203.GA13218@dcvr.yhbt.net> (raw)
In-Reply-To: <20110301094203.GA13218@dcvr.yhbt.net>
The splice family of Linux system calls can transfer data between file
descriptors without the need to copy data into userspace. Instead of a
userspace buffer, they rely on an ordinary Unix pipe as a kernel-level
buffer.
* http://bogomips.org/ruby_io_splice/
* ruby.io.splice@librelist.com
* git://bogomips.org/ruby_io_splice.git
Changes:
This release adds the IO.trysplice and IO.trytee interfaces
to avoid expensive EAGAIN exceptions for non-blocking I/O.
There is no IO.tryvmsplice method as we still haven't figured
out a good use for IO.vmsplice in Ruby, and non-blocking I/O
with iovecs is just painful! If you want more zero-copy fun
without needing mmap(2), check out the "sendfile" RubyGem and
IO.copy_stream (1.9). As of Linux 2.6.33+, sendfile(2) can copy
mmap-able files to +any+ descriptor, not just sockets.
Please email us at ruby.io.splice@librelist.com if you can think
of a good use for IO.vmsplice or IO.trysplice in Ruby.
--
Eric Wong
parent reply other threads:[~2011-03-01 9:42 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <20110301094203.GA13218@dcvr.yhbt.net>]
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