CVS log for pvfs2/include/pvfs2-event.h
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merged in changes from summer at LANL

reverse merge from HEAD.

reverse merge of changes to HEAD since branch.  Includes small file changes.

Merging small files branch to head.  Includes server side precreation of
data files and file stuffing.

Reverse merged and ported to HEAD.

inode stuffing operation.  also added a keyval_remove_list.

New category to directly visualize SM states in jumpshot... (future work for this branch, is already available in migration-hint branch).

Allow the API setting of pvfs2-set-eventmask by name not by hex.

Update migration branch to current CVS version

Adapt event managment (more to come) for mpe for our needs.
Also add stuff from atop to allow to get detailed system statistics.
Performance counter now logs additional stuff: load, cpu usage, network and disk usage (more possible, thx atop). These values are given to the event managment and loggend in mpe.

backmerging of HEAD to branch...

Merge HEAD into Walt's branch.
Rework new state machines to the new cleanups introduced by Walt.

Merge posix-extensions-branch to HEAD
This branch implemented patches to the 2.6.16 kernel for the proposed POSIX I/O extensions and those patches are under
the patches subdirectory.
It also implements the PVFS2 specific hooks for these system calls.

Tools that may be of immediate use to the pvfs2 general audience is the pvfs2-lsplus utility in src/apps/admin
that should be noticeably faster than the pvfs2-ls utility if there are a lot of objects in a single directory.
Other features are left out by configure and are not even built if the kernels do not support those features
and callbacks.

Reverse merge changes from HEAD to posix-extensions-branch.

reverse merge of recent bug fixes from trunk

commit of keyval handle info changes.  This allows info to be stored on a per handle basis in a 'null key' inside the database.  Right now we just use it to store the count of directory entries, so that we don't have to do a read/modify/write in crdirent and rmdirent.

Also includes changes to the keyval strings to use #define values instead of the actual strings.  This just makes that code lest prone to bugs in the future.

First cut of the sys_readdirplus implementation where clients can issue a single
system interface call to get the directory entries as well as the attribute information
of the directory entries.
What this means is that we do not need to call a sys_getattr of the individual directory entries
anymore.
(The kernel version is still untested and won't work until the VFS patch is in place! :))

On the server, there is now a new request/state machine called listattr(poor name, i know!)
which essentially does a vectored getattr for a list of handles as opposed to a getattr
which only does for 1. Perhaps, we need to consolidate them into 1 at a later point of time after
others have given this code a look-see!
On the client, there is a new system interface, and a corresponding statemachine implementation
called readdirplus which does the following algorithm
a) Step 1 - Do a regular readdir
b) Step 2 - Collate all meta handles (obtained from the readdir) and send out 1 listattr
to every server that owns atleast 1 handle from the set.
c) Step 3 - Handles that refer to metafiles (determined by the attributes of the response)
need an additional step to retrieve their file sizes. So we collate all data file handles
of all metafiles, and send out 1 listattr to every server that owns atleast 1 handle from
the set.
d) Step 4 - Copy object attributes obtained for all objects into the sys response structure and
also compute file sizes of regular files since we know the individual dfile handles' file sizes
from Step 3.

Clearly, this is a huge win in terms of performance of listing directories which have large number of directory
entries.
Next step is to hammer out the VFS patches and coreutils patch for ls to get the same benefit.
Also added a new utility called pvfs2-lsplus in src/apps/admin that uses this API.

updates to my event changes to bring them inline with trunk

merge changes from trunk since branch point into branch.  Effectively moves the branchpoint to the latest trunk.

added extended attribute support

updates for adding extended attributes

*** empty log message ***

* added event logging for states
* moved state debug code to state-machine so all state start/end
points get debug messages automatically
* added textlog stuff.  This allows us to write the default event
queue out to a text file that can be converted to slog2 later.

shifted operation masks in event logging subsystems up by one so that
confusing 0 value isn't used

- applied Nathan's expandtab patch (expandtab-2.patch.gz)

  first referenced at:
  http://www.beowulf-underground.org/pipermail/pvfs2-developers/2004-July/000745.html

added event level instrumentation to most of the job calls, reorganized
definitions for operation types in pvfs2-event.h (make it so that the same
op type defines can be used in multiple api's, get rid of power of two values
for op types), probably need to rethink how (if at all) to mask off individual
operations for analysis

added event logging instrumentation that tracks the beginning and end of
each full server state machine

instrumented request encoder decoder using event logging interface (not
that I am concerned about perf, just needed a quick way to observe how
big wire format reqs and resps are); minor fix to event macros to allow
operations with op value set to 0 to pass through

added event logging macros to read_list and write_list in dbpf (though
they do not record sizes yet), adjusted some other even macros here and there

instrumented bmi_tcp code

fixed some bugs, and gave pvfs2-event-mon-example the ability to dump
out event log results (not in human readable form, parse with a seperate
tool later)

fixed naming conventions

moved definition of some event logging values into a publicly visable
header, so that applications can get to it to know how to interpret
raw event data