IO-AIO
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Revision history for IO::AIO
TODO: scandir - some dirs mostly contain subdirs - invert logic?
TODO: aio_cptree/mvtree
TODO: vmsplice? (http://kerneltrap.org/node/6505 http://lwn.net/Articles/178199/)
TODO: getxattr, setxattr, listxattr, removexattr etc.?
TODO: emulation for splice?
TODO: syncfs/sync windows:
TODO: posix_fallocate when flags=0
http://stackoverflow.com/questions/65170/how-to-get-name-associated-with-open-handle/5286888#5286888
http://blogs.msdn.com/b/adioltean/archive/2005/04/16/408947.aspx
http://msdn.microsoft.com/en-us/library/aa366789%28v=vs.85%29.aspx
http://msdn.microsoft.com/en-us/library/windows/desktop/aa366789%28v=vs.85%29.aspx
http://msdn.microsoft.com/en-us/library/windows/desktop/aa364425%28v=vs.85%29.aspx
http://msdn.microsoft.com/en-us/library/windows/desktop/aa364963%28v=vs.85%29.aspx
http://msdn.microsoft.com/en-us/library/windows/desktop/aa364996%28v=vs.85%29.aspx
http://msdn.microsoft.com/en-us/library/windows/desktop/aa364994%28v=vs.85%29.aspx
TODO: extra socket/tcp constants &c?
TODO: name_to_handle_At + open_by_handle_at = clone fds
TODO: lchown
TODO: ioprio_get/set
TODO: rewrite rmtree et al. to support working directories (also speed them up)
TODO: maybe IO::AIO leaks fds when requests are cancelled? maybe initialise result to -1?
TODO: aio_wd should use O_PATH on linux, due to lacking O_SEARCH (http://comments.gmane.org/gmane.linux.file-systems/33611)
http://www.openwall.com/lists/musl/2013/02/23/4
TODO: FIDEDUPERANGE, file_ioctl.c
TODO: mincore
TODO: SOCK_CLOEXEc etc.
TODO: unlinkat flags, linkat flags, statat, renameat2 flags
TODO: https://kernelnewbies.org/Linux_4.11
TODO: define useful rules for [[$wd, $path], $path] &c and implement them
TODO: https://github.com/coreutils/coreutils/blob/master/src/stat.c maybe IO::AIO::FSID
TODO: mlock2, MLOCK_ONFAULT
TODO: dup3, pipe2, accept4
TODO: dump config.log when automated testign and configure fails
TODO: ns time resolution in utime
TODO: statx
TODO: aio_fchdir/chdir? emulate chdirat?
TODO: rt-4.0.18-20109-1573826674-1229.126277-5-0@rt.cpan.org
TODO: aio_splice, aio_tee
TODO: copy_file_range
TODO: write more abpout the thread model, maybe bump some defaults?
TODO: io_uring, but it's so broken :/
TODO: allow import of fds as aio_wd
TODO: close_range
TODO: move_mount, open_tree, fsmount, fspick, fsconfig, fsopen https://lwn.net/Articles/759499/
TODO: aio_mmap
4.81 Tue 20 Feb 2024 07:38:35 CET
- work around a bug in musl w.r.t to O_SEARCH and use EIO_O_PATH instead,
vertifying the semantics against the subset of O_PATH and O_SEARCH
(based on a report by Steve Dondley).
- aio_copy now tries to preallocate the destination file.
- fexecve configure test used the wrong püointer type (patch by Paul Howarth).
4.80 Sat 01 Apr 2023 04:13:37 CEST
- remove long obsolete "paths must be absolute" text in aio_open/stat
descriptions.
- another workaround for the low-quality musl libc.
- test for umount seperately, as it is more portable.
- some low-quality posix attempts (openbsd, osx) declare the availability
of fexecve but then don't even bother to implemnent a stub.
4.79 Sun 25 Sep 2022 18:25:53 CEST
- the autoconf result of the mount check was not used, so it failed to
compile on most systems (reported by crackoff@tutanota.com).
- work around fedora not having a working C compiler setup by design
(reported by Paul Howarth).
4.78 Tue 06 Sep 2022 12:54:43 CEST
- add IO::AIO::mount and IO::AIO::umount.
- add a bunch of symbols from sys/mount.h.
4.77 Mon 05 Sep 2022 02:03:38 CEST
- add MFD_HUGETLB_2MB and MFD_HUGETLB_1GB constants.
- add fexecve.
- add lots of missing functions to @EXPORT_OK.
4.76 Tue Jul 27 20:45:01 CEST 2021
3.31 Thu Nov 12 02:14:29 CET 2009
- fix result status documentation of aio_copy, aio_move.
- speed up object creation considerably by avoiding
hash lookups.
3.3 Wed Aug 5 13:52:58 CEST 2009
- use common::sense.
- use common schmorp.h header.
- allow integers (file descriptors) in addition to file handles.
- take advantage of linux' eventfd (but it seems slower on smp?).
- use poll not select on posix platforms.
3.261 Wed Jul 1 10:11:51 CEST 2009
- more 0S X workarounds (patch by Tokuhiro Matsuno).
3.26 Tue Jun 30 09:33:26 CEST 2009
- 0S X of course claims to be posix 2008 but lacks posix_fadvise.
try to work around this horribly broken OS in a somewhat hackish
way. might help other os's too.
3.25 Sat Jun 27 05:18:26 CEST 2009
- added IO::AIO::fadvise and IO::AIO::sendfile.
- (libeio) replaced quicksort+insertion sort by a tuned radix
sort + insertion sort, resulting in comparable runtime (usually
faster) to the old version, but without any ill side effects on
degenerated (for quicksort) data.
- (libeio) correctly sort dirs by inodes if we have perfect type
knowledge and DIRS_FIRST is used.
- (libeio) internally the wrong DT_* constants were used, but no
known system has differing EIO_DT_*/DT_* values, so not an issue.
- removed a (harmless) assert that was left over on the code
but should not have been.
- use more correct types (change IO length from IV to VAL64,
which makes a difference on systems without 64 bit perls).
3.23 Sat Jun 13 16:57:58 CEST 2009
- fix off-by-one bug in aio_readdir that was introduced in the
rushed 3.22 release.
3.22 Sat Jun 13 15:32:40 CEST 2009
- speed up readdirx sort algorithm slightly.
- bin/treescan was missing from distro tarball.
3.21 Fri Jun 12 18:45:53 CEST 2009
- new options --dirs and --files for treescan.
- install bin/treescan by default.
- (libeio) aio_readdir can now be cancelled while executing.
- fix a printf format string for 64 bit systems (could lead
to problems on big endian 64 bit systems).
- do not use qsort() but our own algorithm: glibc initialises
the whole locale and I/O subsystem inside qsort, causing
a stack overflow on 32 bit machines. The new sort uses much less
stack and is more than twice as fast in typical situations.
3.2 Sun Jun 7 20:30:05 CEST 2009
- (libeio) pwrite emulation was even more flawed than intended and did
not restore the file offset.
- add aio_readdirx, which can return inode and filetype and sort
the names in various ways.
- unfortunately, utime, chmod, chown on an open file that has just
been written can easily block, which caused aio_copy to block the
process. no more!
- no longer rely on dst path in aio_copy when futime is available.
3.19 Tue Apr 21 22:05:21 CEST 2009
- more perl 5.10 workarounds for aio_read and write.
- aio_write no longer modifies the sv (if possible).
- aio_read now works correctly with magic values.
3.18 Sun Apr 19 21:17:32 CEST 2009
- better diagnostics when some aio_* functions get passed an illegal fh.
- try to avoid crashes due to incompatible 5.10 API changes. grmbl.
3.17 Thu Nov 20 08:45:36 CET 2008
- (libeio) added aio_sync_file_range (untested).
- add aio_busy to @IO::AIO::AIO_REQ.
3.16 Wed Oct 22 18:28:01 CEST 2008
- use SvREFCNT_inc instead of SvREFCNT_inc_NN in a non-speed critical
part to improve portability to perl 5.8 (reported by szymon).
3.15 Mon Oct 13 00:39:55 CEST 2008
- automatic removal of feeders was broken.
- (libeio) use a more robust method to detect whether a feeder
has added something to the group or not.
3.1 Thu Oct 2 13:34:40 CEST 2008
- pre-deref the passed callback object, for increased speed
and decreased memory usage.
- call on_next_submit callback even for aio_group - impact unknown,
but seems more correct.
- $req->cb now returns the original callback.
- (libeio) pass EIO_GROUP/aio_group requests through the queue without
requiring a thread switch.
- (libeio) status code of aio_futime and aio_utime was always passed 0.
- do some other µ-optimisations.
3.07 Sat Aug 2 16:06:13 CEST 2008
- do not include LIBS in autoconf tests.
3.06 Tue Jul 15 12:41:32 CEST 2008
- move preadwritelock definition before it's first reference,
to make it compile again on broken platforms (they still exist)
or badly cofngiured perls (redhat...), reported by Rob Bloodgood.
3.05 Thu Jun 19 23:23:52 CEST 2008
- work around perl overriding readdir etc. with thread-unsafe
(sic!) versions.
3.04 Wed Jun 18 01:35:38 CEST 2008
- (libeio) fix eio_mknod, which confused it's arguments.
- (libeio) do not use readdir_r, as Ulrich Drepper pointed out that this
is stupid.
- (libeio) fix eio__readahead prototype, patch by Jost Krieger.
- (libeio) fix a bug that could potentially cause IO::AIO
not to get initialised properly.
3.03 Thu May 29 05:33:30 CEST 2008
- (libeio) correctly call pthread_attr_destroy ().
- (libeio) work around broken bsd headers once more.
- bring back working fchmod.
- nop and busy now set result to 0.
- set errno to ENOMEM when allocation fails.
3.01 Sun May 11 03:07:03 CEST 2008
- (libeio) make it compile on systems without readahead or readdir_r.
- (libeio) improve configure check for readahead availability.
- do not try to link against -lrt.
- use a separate configure script for IO::AIO (not the libeio one).
3.0 Sun May 11 00:57:14 CEST 2008
- added bin/treescan to the distribution.
- switched to using libeio.
- LOTS OF INCOMPATIBLE CHANGES:
- remove signal functionality, it is not worth the effort.
- max_outstanding no longer returns the previous number of requests.
- poll_cb no longer returns number of requests.
2.62 Sat Apr 26 13:59:33 CEST 2008
- port to solaris perls configured for old posix
(analysed by Jost Krieger).
- keep a reference to the perl filehandle object in aio_close,
so it doesn't get closed prematurely, leading to ugly races.
2.61 Wed Apr 16 18:45:02 CEST 2008
- fix treescan output duplication and improve output ordering.
also display files given on the commandline.
- use a different algorithm for aio_close that is faster
and probably has even lower chances of blocking.
- do our own stack memory management for threads - linux
allocates outrageous amounts of VM (not so bad unless you
use mlockall...), which severely limits the number of threads
on 32-bit arches: stack size is the larger of PTHREAD_STACK_MIN
and 4096 * sizeof (long) (usually this is 16..64k).
2.6 Sun Mar 30 08:28:11 CEST 2008
- added aio_sync.
- added aio_pathsync.
- fix prototypes of (void) functions.
2.51 Sat Oct 6 16:04:54 CEST 2007
- perlio isn't generally threadsafe, so aio_close could not work reliably.
aio_close now tries a safe hack that might not be that asynchronous
(see the manpage for details).
- discard callback return values as to not grow the stack endlessly
when poll_cb handles many requests without returning.
- minor code cleanups.
2.5 Thu Oct 4 14:49:08 CEST 2007
- replaced _fd2fh with faster xs code.
- aio_close will now try to do "the right thing" and thus might
work sensibly for the very first time.
2.41 Mon Sep 24 21:28:21 CEST 2007
- after fork, invest some work to make sure that the poll_fileno
stays stable (by dup2'ing the new fd over the old one), to make
it easier for programs/libs that don't control their forking
behaviour and cannot recreate their watchers.
2.4 Sun Aug 5 18:44:22 CEST 2007
- add aio_truncate, aio_chmod, aio_chown, aio_utime (linux
successfully demonstrated that you can block on futimes...).
- allow undef as fileoffset for aio_read/write and use read/write(2)
internally (useful for sockets or O_APPEND handles).
- allow undef for length in aio_write.
- negative dataoffsets work as expected now in aio_read/aio_write.
- use NV instead of UV for 32 bit perls and file offsets, as NVs
have a larger range then.
- shared code between BDB and IO::AIO.
- aio_busy was completely broken. now fixed.
- readahead emulation now returns something.
- correctly set errno to ENOSYS on unimplemented functions
(should never happen, though).
- large changes to make it partially compile and run on win32,
but win32 lacks too much functionality, and perl overrides way
too many functions with crashing versions.
2.33 Tue Jan 23 23:55:41 CET 2007
- fix install path (Andreas J. Koenig).
2.32 Mon Jan 22 16:56:23 CET 2007
- added aio_rmtree.
- wow, aio_mkdir was missing.
- aio_load did return undef on error, not -1.
- use prefixexp not prefix in autoconf.pm
(suggested by ... rt.cpan.org unreachable).
- avoid installing autoconf.pm.
2.31 Sat Jan 6 03:46:02 CET 2007
- added aio_load.
2.3 Sat Dec 23 05:48:07 CET 2006
- fix off-by-one bug in aio_read, causing memory corruption
or crashes.
2.21 Fri Dec 22 05:03:38 CET 2006
- minor doc updates.
- minor cleanups.
- IO::AIO::poll returns request count.
- undocumented and unfinished async-signal-reporting.
2.2 Tue Oct 31 00:31:00 CET 2006
- minor doc updates.
- added aio_readlink.
- properly zero-terminate aio_read buffer.
- fix aio_read/write with nonzero dataoffset.
- reduced size of aio request structure.
- better diagnostics when pathnames etc. are not byte-encoded;
do not leak request in that case, either.
2.1 Sun Oct 29 02:01:57 CET 2006
- INCOMPATIBLE CHANGE: replace IO::AIO::poll_some by
IO::AIO::max_poll_reqs and IO::AIO::max_poll_time.
- fix a bug in aio_move where it would fail everytime
it would have to copy files manually.
- doc updates.
- start threads only on (very low) demand.
- end superfluous threads automatically after 10s idling.
- add IO::AIO::max_idle to control this.
- some tuning applied to random places.
- add aio_mknod.
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