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author | John Mainzer <mainzer@hdfgroup.org> | 2004-12-18 01:30:34 (GMT) |
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committer | John Mainzer <mainzer@hdfgroup.org> | 2004-12-18 01:30:34 (GMT) |
commit | 5c415042a3e1d5480ff5309ddce29b4f6be753d7 (patch) | |
tree | e43b7c6185050281863b369d2e91580b98851755 /config/pgi-fflags | |
parent | c8645048e2e4e346118e79c876f2b86608330af9 (diff) | |
download | hdf5-5c415042a3e1d5480ff5309ddce29b4f6be753d7.zip hdf5-5c415042a3e1d5480ff5309ddce29b4f6be753d7.tar.gz hdf5-5c415042a3e1d5480ff5309ddce29b4f6be753d7.tar.bz2 |
[svn-r9687] Purpose:
Modify the cache code (H5C) to support automatic cache resizing to
adapt to the work load at run time.
Description:
Different applications require different sized caches to maintain
an acceptable hit rate. This set of changes attempts to provide the
ability to adjust to circumstances automatically.
Solution:
Added highly configurable code to allow the user to either set a
fixed cache size, or allow the cache to grow and shrink according to
conditions.
If enabled, cache size increases are triggered when the hit rate
drops below a user specified threshold in a user specified interval.
Cache size reductions (if enabled) are triggered when either the
hit rate exceeds some user specified threshold over a user specified
interval, when the cache contains "enough" entries that haven't been
accessed for a user specified interval, or some mix of the above.
See the header comments on the H5C_auto_size_ctl_t structure in
H5Cprivate.h for further details.
At present, the cache resize configuration options are not
accessible via the user API. Must add this.
Platforms tested:
h5committested, heping (serial), and copper (parallel)
Misc. update:
Diffstat (limited to 'config/pgi-fflags')
0 files changed, 0 insertions, 0 deletions