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[svn-r16938] Purpose:

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Modifying default cache configuration, and adding an #ifdef to allow for a 
    separate default configuration when parallel is enabled. This is being 
    modified in order to address an observed performance problem with the 
    current default configuration.

Description of Changes:

    - increasing maximum cache size from 16MB to 32MB
    - increasing maximum entry size from 10MB to 32MB
    - decreasing min_clean_fraction from 0.3 to 0.01 in serial case
    - increasing flash_multiple from 1.0 to 1.4 in serial case

Tested:
  
    jam
This commit is contained in:
Mike McGreevy 2009-05-12 17:07:21 -05:00
parent 2a3c76f685
commit 36431fa74c
2 changed files with 38 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
src/H5ACprivate.h
View File

@ -208,6 +208,7 @@ extern hid_t H5AC_ind_dxpl_id;
/* Default cache configuration. */
#ifdef H5_HAVE_PARALLEL
#define H5AC__DEFAULT_CACHE_CONFIG \
{ \
/* int version = */ H5C__CURR_AUTO_SIZE_CTL_VER, \
@ -219,7 +220,7 @@ extern hid_t H5AC_ind_dxpl_id;
/* hbool_t set_initial_size = */ TRUE, \
/* size_t initial_size = */ ( 2 * 1024 * 1024), \
/* double min_clean_fraction = */ 0.3, \
/* size_t max_size = */ (16 * 1024 * 1024), \
/* size_t max_size = */ (32 * 1024 * 1024), \
/* size_t min_size = */ ( 1 * 1024 * 1024), \
/* long int epoch_length = */ 50000, \
/* enum H5C_cache_incr_mode incr_mode = */ H5C_incr__threshold, \
@ -241,6 +242,41 @@ extern hid_t H5AC_ind_dxpl_id;
/* double empty_reserve = */ 0.1, \
/* int dirty_bytes_threshold = */ (256 * 1024) \
}
#else /* H5_HAVE_PARALLEL */
#define H5AC__DEFAULT_CACHE_CONFIG \
{ \
/* int version = */ H5C__CURR_AUTO_SIZE_CTL_VER, \
/* hbool_t rpt_fcn_enabled = */ FALSE, \
/* hbool_t open_trace_file = */ FALSE, \
/* hbool_t close_trace_file = */ FALSE, \
/* char trace_file_name[] = */ "", \
/* hbool_t evictions_enabled = */ TRUE, \
/* hbool_t set_initial_size = */ TRUE, \
/* size_t initial_size = */ ( 2 * 1024 * 1024), \
/* double min_clean_fraction = */ 0.01, \
/* size_t max_size = */ (32 * 1024 * 1024), \
/* size_t min_size = */ ( 1 * 1024 * 1024), \
/* long int epoch_length = */ 50000, \
/* enum H5C_cache_incr_mode incr_mode = */ H5C_incr__threshold, \
/* double lower_hr_threshold = */ 0.9, \
/* double increment = */ 2.0, \
/* hbool_t apply_max_increment = */ TRUE, \
/* size_t max_increment = */ (4 * 1024 * 1024), \
/* enum H5C_cache_flash_incr_mode */ \
/* flash_incr_mode = */ H5C_flash_incr__add_space, \
/* double flash_multiple = */ 1.4, \
/* double flash_threshold = */ 0.25, \
/* enum H5C_cache_decr_mode decr_mode = */ H5C_decr__age_out_with_threshold,\
/* double upper_hr_threshold = */ 0.999, \
/* double decrement = */ 0.9, \
/* hbool_t apply_max_decrement = */ TRUE, \
/* size_t max_decrement = */ (1 * 1024 * 1024), \
/* int epochs_before_eviction = */ 3, \
/* hbool_t apply_empty_reserve = */ TRUE, \
/* double empty_reserve = */ 0.1, \
/* int dirty_bytes_threshold = */ (256 * 1024) \
}
#endif /* H5_HAVE_PARALLEL */
/*

2
src/H5Cprivate.h
View File

@ -46,7 +46,7 @@
*
* JRM - 5/17/04
*/
#define H5C_MAX_ENTRY_SIZE ((size_t)(10 * 1024 * 1024))
#define H5C_MAX_ENTRY_SIZE ((size_t)(32 * 1024 * 1024))
/* H5C_COLLECT_CACHE_STATS controls overall collection of statistics
* on cache activity. In general, this #define should be set to 0.