Revision history for IO::AIO
TODO: better autoconf.pm that can return LIBS etc.
TODO: aio_cptree/mvtree
TODO: reduce condvar fairness: schedule hot-cache-threads first?
TODO: splice/tee/vmsplice? (http://kerneltrap.org/node/6505 http://lwn.net/Articles/178199/)
TODO: aio_fcntl, at least for file-locking
TODO: fallocate, if it wouldn't be so useless.
3.26 Tue Jun 30 09:33:26 CEST 2009
- os x of course claims 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 ยต-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.
- reduce shared library size again by not including wrappers.
- max_outstanding could cause poll to enter a busy-waiting loop.
- document the new IO::AIO::poll_cb result value.
3.02 Mon May 12 02:32:02 CEST 2008
- fix a memory leak on aio_readlink.
- 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.
2.0 Thu Oct 26 18:27:58 CEST 2006
- minor incompatibility: max_outstanding semantics have changed.
- major rewrite, consider all functionality EXPERIMENTAL.
- aio requests can be cancelled.
- callbacks can be (re-)set later.
- aio requests can choose between 9 priorities.
- add aio_group: aio requests can be grouped
into composite requests.
- generator interface for groups.
- add IO::AIO::poll_some.
- major documentation improvements.
- very minor bugfixes.
- add aio_nop for dummy requests.
- add aio_busy mainly for benchmarking and debugging.
- use "fast" mutexes on linux.
- use dynamic (and larger) buffers instead of
putting them onto the stack.
- optimise x86 and amd64 a bit.
- better error checking when ENOMEM.
- hopefully fix mem and dirp leaks on fork.
- warn about broken perl malloc.
- compiles on cygwin (but pread is broken on cygwin
which is not detected by autoconf, so you have to
edit autoconf/config.h yourself to enable emulation).
1.8 Sat Jun 24 22:20:44 CEST 2006
- add and/or document aio_rename, aio_link, aio_symlink and aio_move.
1.73 Wed Mar 1 22:49:32 CET 2006
- codename "jost"
- AIX/Solaris(?) aren't being helpful again, hardcode a value
for NAME_MAX and drive with your eyes closed (reported by
wcooley@nakedape.cc).
1.72 Thu Feb 2 00:40:44 CET 2006
- another minor bug in aio_scandir, again, the callback was called
twice when the directory can't be stat'ed.
1.71 Mon Dec 26 20:20:03 CET 2005
- grr, another minor bug in aio_scandir, this time resulting
in a runtime error.
1.7 Mon Dec 26 19:29:48 CET 2005
- aio_scandir errornously called callback twice in some cases.
- added AnyEvent example.
1.61 Wed Sep 7 19:40:42 CEST 2005
- no longer include $Config{libs}, as distros include too much
garbage in there that is not installed on typical systems
(for example, debian links perl against -lgdbm and many more
libraries despite perl not needing it, slowing down startup and
wasting memory).
1.6 Tue Aug 30 17:44:44 CEST 2005
- added aio_readdir, aio_scandir.
- added aio_sendfile, including sendfile emulation when sendfile
isn't available. Linux, FreeBSD and HP-UX might work (sendfilev
support is unavailable on my solaris 8 machine, but preliminary
code is there. What's lacking is configury stuff and testing...).
1.5 Sat Aug 20 02:32:19 CEST 2005
- create the aio threads on demand only (good after forking).
- somebody nagged about C89 compatibility, so this release should
be C89 compatible, but no guarantees for future ones.
- abort when the configure script fails.
1.4 Wed Aug 17 08:07:27 CEST 2005
- forgot to recreate the pipe after forking, this could cause
deadlocks.
1.3 Wed Aug 17 07:25:54 CEST 2005
- properly propagate exceptions from callbacks, instead of silently
eating them.
- use a different fork algorithm that avoids recursive callback
invocations and reduces fork latency in busy processes.
- fix a bug where the buffer scalar in aio_read got assigned the wrong
length after reading.
- fix a bug where the child would process some outstanding requests
from the parent.
- make a copy of the callback scalar, to avoid some very uncommon
(but valid) usages where the callback scalar changes.
- the callback was never freed in aio_read/aio_write.
- aio_read/aio_write will now set the readonly flag on the data
scalar for better error reporting.
1.2 Wed Aug 17 01:22:58 CEST 2005
- verified on cygwin, linux/amd64+ia32+alpha, solaris.
- use SvPVbyte for filenames now. You *need* to encode your strings to
the external filename encoding first.
- fix the bug where filehandles could leak (again).
- clarify freebsd situation: make it work and tell me how, or go away
with your underdocumented, broken and outdated OS.
- fork'ing should now be officially supported (where linux and
posix contradict each other, I followed posix).
- only call read() once per poll, not twice (speedup).
- new functions: aio_rmdir, aio_symlink.
- force callback arguments to be undef or a reference, for better
error catching.
1.1 Sun Aug 7 05:27:23 CEST 2005
- added configure script to detect availability of some calls.
(imperfect, as we cannot detect things like -lrt due to missing
feedback yet).
- emulate fdatasync via fsync, pread/pwrite via unsafe read/write
and readahead via manual reading on platforms lacking those.
- ported t/03_errors.t+framework by Brad Fitzpatrick
from Linux::AIO.
- removed XOPEN_SOURCE because stupid solaris 9 doesn't
compile with it enabled. Probably breaks others. Oh well.
- try to be more careful with errno on non-threaded perls.
- cygwins perl insisted on a matching open mode when morphing
the fd to an fh.
- convert sv's to "byte" encoding in aio_read/aio_write. Might
do that for pathnames, too, in the future, so make sure you
properly encode your pathnames.
1.0 Fri Jul 22 10:43:30 CEST 2005
- aio_open did not reliably deliver (open) filehandles.
- all aio_*-functions keep a reference to the filehandle so
it doesn't go away while the aio requests is working on it.
- disable warnings in AIO.pm.
0.9 Wed Jul 20 23:55:04 CEST 2005
- allow recursive calls to poll_cb, use less locking calls, too.
- fix the Gtk2-example in the SYNOPSIS.
- use pread/pwrite not pread64/pwrite64. this was simply a leftover
from Linux::AIO.
(found by compiling on cygwin. Unfortunately, cygwin declares but
does not implement pread/pwrite).
- only include <sys/syscall.h> on linux.
0.5 Tue Jul 12 13:03:09 CEST 2005
- removed #include <endian.h>, it's not portable, and we don't
need it anyway.
- link against -lrt, as it might contain goodies such as fdatasync,
and often aio_read, which we do not use yet, but it shouldn't hurt.
0.4 Mon Jul 11 05:28:25 CEST 2005
- added IO::AIO::flush, IO::AIO::poll.
- make callback argument optional for all calls.
0.3 Mon Jul 11 01:42:37 CEST 2005
- restructured manpage.
- added SYNOPSIS with examples for Event, Glib, Tk.
- remove explicit context support so I don't have to maintain
it for threaded perls (i.e. it should work now :).
0.2 Sun Jul 10 22:57:12 CEST 2005
- return immediately from poll_wait if nreqs==0.
- get rid of the request pipe and use faster thread-thread
communications for most requests and responses.
0.1
- cloned from Linux::AIO, which is very similar.