public class H5AC_cache_config_t extends Object implements Serializable
Modifier and Type | Field and Description |
---|---|
boolean |
apply_empty_reserve
apply_empty_reserve: Boolean field controlling whether the empty_reserve
field is to be used in computing the new cache size when the
decr_mode is H5C_decr__age_out or H5C_decr__age_out_with_threshold.
|
boolean |
apply_max_decrement
apply_max_decrement: Boolean flag used to determine whether decrements
in cache size are to be limited by the max_decrement field.
|
boolean |
apply_max_increment
apply_max_increment: Boolean flag indicating whether the max_increment
field should be used to limit the maximum cache size increment.
|
boolean |
close_trace_file
close_trace_file: Boolean field indicating whether the current trace
file (if any) should be closed.
|
int |
decr_mode
decr_mode: Instance of the H5C_cache_decr_mode enumerated type whose
value indicates how we determine whether the cache size should be
decreased.
|
double |
decrement
decrement: This field is only used when the decr_mode is
H5C_decr__threshold.
|
long |
dirty_bytes_threshold
dirty_bytes_threshold: Threshold of dirty byte creation used to
synchronize updates between caches.
|
double |
empty_reserve
empty_reserve: To avoid a constant racheting down of cache size by small
amounts in the H5C_decr__age_out and H5C_decr__age_out_with_threshold
modes, this field allows one to require that any cache size
reductions leave the specified fraction of unused space in the cache.
|
long |
epoch_length
epoch_length: Number of accesses on the cache over which to collect
hit rate stats before running the automatic cache resize code,
if it is enabled.
|
int |
epochs_before_eviction
epochs_before_eviction: Integer field used in H5C_decr__age_out and
H5C_decr__age_out_with_threshold decrement modes.
|
boolean |
evictions_enabled
evictions_enabled: Boolean field used to either report the current
evictions enabled status of the cache, or to set the cache's
evictions enabled status.
|
int |
flash_incr_mode
flash_incr_mode: Instance of the H5C_cache_flash_incr_mode enumerated
type whose value indicates whether and by which algorithm we should
make flash increases in the size of the cache to accommodate insertion
of large entries and large increases in the size of a single entry.
|
double |
flash_multiple
flash_multiple: Double containing the multiple described above in the
H5C_flash_incr__add_space section of the discussion of the
flash_incr_mode section.
|
double |
flash_threshold
flash_threshold: Double containing the factor by which current max cache
size is multiplied to obtain the size threshold for the add_space flash
increment algorithm.
|
int |
incr_mode
incr_mode: Instance of the H5C_cache_incr_mode enumerated type whose
value indicates how we determine whether the cache size should be
increased.
|
double |
increment
increment: Double containing the multiplier used to derive the new
cache size from the old if a cache size increment is triggered.
|
long |
initial_size
initial_size: If enabled, this field contain the size the cache is
to be set to upon receipt of this structure.
|
double |
lower_hr_threshold
lower_hr_threshold: Lower hit rate threshold.
|
long |
max_decrement
max_decrement: Maximum number of bytes by which the cache size can be
decreased in a single re-size.
|
long |
max_increment
max_increment: If enabled by the apply_max_increment field described
above, this field contains the maximum number of bytes by which the
cache size can be increased in a single re-size.
|
long |
max_size
max_size: Maximum size to which the cache can be adjusted.
|
int |
metadata_write_strategy
metadata_write_strategy: Integer field containing a code indicating the
desired metadata write strategy.
|
double |
min_clean_fraction
min_clean_fraction: double in the range 0 to 1 indicating the fraction
of the cache that is to be kept clean.
|
long |
min_size
min_size: Minimum size to which the cache can be adjusted.
|
boolean |
open_trace_file
open_trace_file: Boolean field indicating whether the trace_file_name
field should be used to open a trace file for the cache.
|
boolean |
rpt_fcn_enabled
rpt_fcn_enabled: Boolean field used to enable and disable the default
reporting function.
|
boolean |
set_initial_size
set_initial_size: Boolean flag indicating whether the size of the
initial size of the cache is to be set to the value given in
the initial_size field.
|
String |
trace_file_name
trace_file_name: Full path of the trace file to be opened if the
open_trace_file field is TRUE.
|
double |
upper_hr_threshold
upper_hr_threshold: Upper hit rate threshold.
|
int |
version
version: Integer field containing the version number of this version
of the H5AC_cache_config_t structure.
|
Constructor and Description |
---|
H5AC_cache_config_t(int version,
boolean rpt_fcn_enabled,
boolean open_trace_file,
boolean close_trace_file,
String trace_file_name,
boolean evictions_enabled,
boolean set_initial_size,
long initial_size,
double min_clean_fraction,
long max_size,
long min_size,
long epoch_length,
int incr_mode,
double lower_hr_threshold,
double increment,
boolean apply_max_increment,
long max_increment,
int flash_incr_mode,
double flash_multiple,
double flash_threshold,
int decr_mode,
double upper_hr_threshold,
double decrement,
boolean apply_max_decrement,
long max_decrement,
int epochs_before_eviction,
boolean apply_empty_reserve,
double empty_reserve,
long dirty_bytes_threshold,
int metadata_write_strategy)
H5AC_cache_config_t is a public structure intended for use in public APIs.
|
public int version
public boolean rpt_fcn_enabled
public boolean open_trace_file
public boolean close_trace_file
public String trace_file_name
public boolean evictions_enabled
public boolean set_initial_size
public long initial_size
public double min_clean_fraction
public long max_size
public long min_size
public long epoch_length
public int incr_mode
public double lower_hr_threshold
public double increment
public boolean apply_max_increment
public long max_increment
public int flash_incr_mode
public double flash_multiple
public double flash_threshold
public int decr_mode
public double upper_hr_threshold
public double decrement
public boolean apply_max_decrement
public long max_decrement
public int epochs_before_eviction
public boolean apply_empty_reserve
public double empty_reserve
public long dirty_bytes_threshold
public int metadata_write_strategy
public H5AC_cache_config_t(int version, boolean rpt_fcn_enabled, boolean open_trace_file, boolean close_trace_file, String trace_file_name, boolean evictions_enabled, boolean set_initial_size, long initial_size, double min_clean_fraction, long max_size, long min_size, long epoch_length, int incr_mode, double lower_hr_threshold, double increment, boolean apply_max_increment, long max_increment, int flash_incr_mode, double flash_multiple, double flash_threshold, int decr_mode, double upper_hr_threshold, double decrement, boolean apply_max_decrement, long max_decrement, int epochs_before_eviction, boolean apply_empty_reserve, double empty_reserve, long dirty_bytes_threshold, int metadata_write_strategy)
version:
- Integer field containing the version number of this versionrpt_fcn_enabled:
- Boolean field used to enable and disable the default reporting function.open_trace_file:
- Boolean field indicating whether the trace_file_name
field should be used to open a trace file for the cache.close_trace_file:
- Boolean field indicating whether the current trace
file (if any) should be closed.trace_file_name:
- Full path of the trace file to be opened if the
open_trace_file field is TRUE.evictions_enabled:
- Boolean field used to either report or set the current
evictions enabled status of the cache.set_initial_size:
- Boolean flag indicating whether the size of the
initial size of the cache is to be set to the value given in
the initial_size field.initial_size:
- If enabled, this field contain the size the cache is
to be set to upon receipt of this structure.min_clean_fraction:
- double in the range 0 to 1 indicating the fraction
of the cache that is to be kept clean.max_size:
- Maximum size to which the cache can be adjusted.min_size:
- Minimum size to which the cache can be adjusted.epoch_length:
- Number of accesses on the cache over which to collect
hit rate stats before running the automatic cache resize code.incr_mode:
- Instance of the H5C_cache_incr_mode enumerated type.lower_hr_threshold:
- Lower hit rate threshold.increment:
- Double containing the multiplier used to derive the new
cache size from the old if a cache size increment is triggered.apply_max_increment:
- Boolean flag indicating whether the max_increment
field should be used to limit the maximum cache size increment.max_increment:
- If enabled by the apply_max_increment field described
above, this field contains the maximum number of bytes by which the
cache size can be increased in a single re-size.flash_incr_mode:
- Instance of the H5C_cache_flash_incr_mode enumerated
type whose value indicates whether and by which algorithm we should
make flash increases in the size of the cache to accommodate insertion
of large entries and large increases in the size of a single entry.flash_multiple:
- Double containing the multiple described above in the
H5C_flash_incr__add_space section of the discussion of the
flash_incr_mode section.flash_threshold:
- Double containing the factor by which current max cache
size is multiplied to obtain the size threshold for the add_space flash
increment algorithm.decr_mode:
- Instance of the H5C_cache_decr_mode enumerated type whose
value indicates how we determine whether the cache size should be
decreased.upper_hr_threshold:
- Upper hit rate threshold. The use of this field
varies according to the current decr_mode.decrement:
- This field is only used when the decr_mode is
H5C_decr__threshold.apply_max_decrement:
- Boolean flag used to determine whether decrements
in cache size are to be limited by the max_decrement field.max_decrement:
- Maximum number of bytes by which the cache size can be
decreased in a single re-size.epochs_before_eviction:
- Integer field used in H5C_decr__age_out and
H5C_decr__age_out_with_threshold decrement modes.apply_empty_reserve:
- Boolean field controlling whether the empty_reserve
field is to be used in computing the new cache size when the
decr_mode is H5C_decr__age_out or H5C_decr__age_out_with_threshold.empty_reserve:
- To avoid a constant racheting down of cache size by small
amounts in the H5C_decr__age_out and H5C_decr__age_out_with_threshold
modes.dirty_bytes_threshold:
- Threshold of dirty byte creation used to
synchronize updates between caches.metadata_write_strategy:
- Integer field containing a code indicating the
desired metadata write strategy.Copyright © 2024. All rights reserved.