Roadmaps
Contents
Filebench 1.5
- Import of a file system tree
- Custom variables
- Non-interactive runs
- Performance improvements (not that much statstics by default)
- Grammer clean-up
- More code reductions
Filebench Future
- Testing platform
Various
To discuss with George
- Separate commit for every logical (even small) change
- Kernel coding conventions. E.g., (avd == NULL) => !avd
int function()
commits should pass checkpatch.pl
- No code that is not used by anything. Should be used by at least something.
- configure.ac Makefile.am changes cause changes in configure/Makefile and others. Use CentOS 6.4 with specific autotools versions. Have a git-verify hook for this?
- No new grammar rules, only reductions in release 1.5. I would really like to avoid addition to grammar at this stage. I'm fine with import functionality though.
- mmap functionality
- Versioning 1.5 or 1.5.0?... Workload files versions
- I'm not a big fan of large comments. Code should explain itself. But, where necessary, the comments should present.
- Testing on varilous platforms: set of tests - both perfomance and
functionality. Different systems. May be on ramdisk?... With many threads?
- Replace random variables by custom variables?
Specifics:
- change in avd_get_int - shouldn't that change avd_get_* every - I don't like randvar printing reintroduction (.seed, .gamma, .type) - Path changes: what if user specifies same directory?... - I like *.fb extension
Plan
- There are many useful changes from George. I don't want to change code until he has sent all of the in a proper way.
- Then the plan can be that: 1) George sends all small scattered patches to me in the coming weeks. We do ping-pong 2) I meanwhile work only on the wiki & testing
- When we're done with the bul of Gerge's small patches - we do regular procedure, but my freeze is over.
- For now I think sending patches is the best option. Git push-pull seems to be not easy at this point.
Other things to fix
- Raw device functionality is broken
- Remove boolean_t - tabular distribution, percents as long
- filesizegamma parameter is not needed as we have custom/random variables with
gamma distribution.
- Move shm_threadflow_lock to the procflow structure where it belongs to.
- make compilation independent from parser_gram.y (so that when we touch it...)
- USAGE2 macros redefine
- add posset align attribute
- FINISH IOPRIO in a better way.
- fix compilation on SUN compilers (reported by Drew Schatt)
- fix multiple run invocations and part-by-part Filebench executione (create-filset, create-proce, stat_snap, etc.) (reported by Drew Schatt)
- Testing system on calvin: VMs with different OSes.
- random file reading with seed, not /dev/urandom (Rick req.)
- fix multiple run invocations and part-by-part Filebench executione (create-filset, create-proce, stat_snap, etc.) (Drew Schatt req.)
- Testing system: VMs with different OSes.
- On Solaris we get bzero() implicit declaration!
- On FreeBSD a lot of mutex attributes are not supported: 46604: 0.001: cannot set mutex attr PROCESS_SHARED on this platform on line 1 46604: 0.002: cannot set mutex attr PROCESS_SHARED on this platform on line 1 46604: 0.002: cannot set mutex attr PROCESS_SHARED on this platform on line 1 46604: 0.002: cannot set mutex attr PROCESS_SHARED on this platform on line 1 The main problem iS SHARED, that means if we have multiple porcesses (not threads) we'll have issues. So, check it and fix if possible.
- usec/cpu-op is incorrect for oltp workload. OLTP in general works
weird. Figure it out, do it only after process model is enabled.
- Check what happens if pthreads (and others, like lm) are not available
- Then do validation of thread vs process model (NFS Webproxy was different(?), e.g.)
- Look more carefully through Solaris-specific functions and data structures
- -D_REENTRANT, do we need it?
- FreeBSD, analog for /proc/stat or libkstat and /proc/<pid>/stat?
- leafdirs attributes for filesets does not work correctly: entry names
for files collide with entry names for leafdirs.
- Ifdefs for all header files
- print all defines, sizeofs, functions used, or something like that
- reenable fscheck command later
- reenable multi_client_sync.c later
- Filebench does not support aio_read?
- HAVE_CFTIME -> HAVE_STRFTIME
- Auto-completio db is outdated
- Enforce configuration option:
#ifdef HAVE_
....
#elif HAVE_
#else
ERROR
#fi
but not just if else that can easily fail.
- eemove config.h on make distclean
- modify filebench so that it supports reuse properly (even for writes)
(then we can use dd of pre-stored images - but how to store them?...)
- Sometimes on white we hang right after thread creation: 927: 7.180: Starting 100 filereaderthread threads wchan shows: futex_wait_queue_meroot()
- add fb_ prefix to all function in order not to pollute namespace
- rename files properly
- Use __function__ constant.
- move random generation from posset.c to fb_random.c
- make a policy about abd_t usage.
Meeting with George on 03/03
- Added George's Sourceforge account to Filebench developer's list
- Agreed with George on most of the things discussed
- grammer and functionality reductions to stabilize FB
- commit per single logical change (even a small one)
- kernel coding style
- use autoconf-2.63-5.1.el6.noarch and automake-1.11.1-4.el6.noarch from CentOS 6.3
- add custom variables along with random variables to Filebench-1.5
- add import functionality from George to Filebench-1.5
- ensure non-interactive runs in Filebench-1.5
- remove all of the "expression evaluation"-like, except one case which keep temorarly: path=$dir/path in filesets. Later work on proper fileset evaluation.
- Think more on grammar from functionality split. Grammer parsing should be separate and responsible for grammar validation mainly. The rest should be separate.
- See incompatible will be the old workload files with new Filebench
- Add performance improvements: collect less statistics by default
- George will submit his smaller scattered patches to Vasily as soon as he can. During this time-window Vasily won't change the code much, not to cause many conflicts. After the bulk of George's small changes are in - we both will continue to work on code together.
- To decide later
- Filebench and workload profiles versioning
- Expression evaluation
- MMAP_FIXED
- Expression evaluation
- Proper raw devices support
- Remove boolean_t
- More clear grammar vs. functionality separation
