/build/buildd/xz-utils-4.999.9beta+20100527/src/xz/hardware.c File Reference

Detection of available hardware resources. More...

#include "private.h"
#include "tuklib_cpucores.h"

Functions
void	hardware_threadlimit_set (uint32_t new_threadlimit)
	Set custom value for maximum number of coder threads.
uint32_t	hardware_threadlimit_get (void)
void	hardware_memlimit_set (uint64_t new_memlimit)
void	hardware_memlimit_set_percentage (uint32_t percentage)
uint64_t	hardware_memlimit_get (void)
	Get the current memory usage limit.
void	hardware_init (void)
Variables
static uint32_t	threadlimit
static uint64_t	memlimit
	Memory usage limit.
static uint64_t	total_ram
	Total amount of physical RAM.

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Detailed Description

Detection of available hardware resources.

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Function Documentation

void hardware_threadlimit_set

(

uint32_t

new_threadlimit

)

Set custom value for maximum number of coder threads.

References threadlimit.

Referenced by hardware_init().

uint32_t hardware_threadlimit_get

(

void

)

Get the maximum number of coder threads. Some additional helper threads are allowed on top of this).

References threadlimit.

Referenced by message_help().

void hardware_memlimit_set

(

uint64_t

memlimit

)

Set custom memory usage limit. This is used for both encoding and decoding. Zero indicates resetting the limit back to defaults.

References memlimit, and total_ram.

Referenced by hardware_init().

void hardware_memlimit_set_percentage

(

uint32_t

percentage

)

Set custom memory usage limit as a percentage of installed RAM. The percentage must be in the range [1, 100].

References memlimit, and total_ram.

uint64_t hardware_memlimit_get

(

void

)

Get the current memory usage limit.

References memlimit.

Referenced by coder_init(), message_help(), message_mem_needed(), message_memlimit(), and parse_indexes().

void hardware_init

(

void

)

Initialize some hardware-specific variables, which are needed by other hardware_* functions.

References hardware_memlimit_set(), hardware_threadlimit_set(), lzma_physmem(), and total_ram.

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Variable Documentation

uint32_t threadlimit [static]

Maximum number of free *coder* threads. This can be set with the --threads=NUM command line option.

Referenced by hardware_threadlimit_get(), and hardware_threadlimit_set().

uint64_t memlimit [static]

Memory usage limit.

Referenced by hardware_memlimit_get(), hardware_memlimit_set(), hardware_memlimit_set_percentage(), message_mem_needed(), and parse_indexes().

uint64_t total_ram [static]

Total amount of physical RAM.

Referenced by hardware_init(), hardware_memlimit_set(), and hardware_memlimit_set_percentage().