-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 According to Brian Ford on 12/28/2006 2:15 PM: > > Current cp gets its initial buffer size from the st_blksize field > returned by fstat, which is currently set to 1k. I have found several > references on the web that state 64k is the "native" I/O size for the > disk cache manager. This might also fix the infamous USB transfer > rate issue as discussed here: > > http://www.cygwin.com/ml/cygwin/2006-08/msg00090.html > > Should we change st_blksize to 64k for performance reasons? > The benefit is non-trivial, IMHO.
There is also the question of whether using posix_fallocate and posix_fadvise will help matters; it is something I've been meaning to get to, but as it currently depends on 1.7.x snapshots, it hasn't been my highest priority. - -- Don't work too hard, make some time for fun as well! Eric Blake [EMAIL PROTECTED] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (Cygwin) Comment: Public key at home.comcast.net/~ericblake/eblake.gpg Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFFlVKP84KuGfSFAYARArQDAKCjUYJOkLnQNZlG9JkoYwoAPtE6UQCZAUBo wOkuVDdl3ufT/DgjfKGtmio= =iYGO -----END PGP SIGNATURE----- -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/