fifo_segment.c File Reference

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Functions
static fifo_segment_slice_t *	fsh_slice_get (fifo_segment_header_t *fsh, u32 slice_index)
static uword	fsh_free_space (fifo_segment_header_t *fsh)
	Fifo segment free space. More...
static void	fsh_free_bytes_sub (fifo_segment_header_t *fsh, int size)
static uword	fsh_n_free_bytes (fifo_segment_header_t *fsh)
static void	fsh_update_free_bytes (fifo_segment_header_t *fsh)
static void	fsh_cached_bytes_add (fifo_segment_header_t *fsh, int size)
static void	fsh_cached_bytes_sub (fifo_segment_header_t *fsh, int size)
static uword	fsh_n_cached_bytes (fifo_segment_header_t *fsh)
static void	fsh_active_fifos_update (fifo_segment_header_t *fsh, int inc)
static u32	fsh_n_active_fifos (fifo_segment_header_t *fsh)
static uword	fsh_virtual_mem (fifo_segment_header_t *fsh)
void	fsh_virtual_mem_update (fifo_segment_header_t *fsh, u32 slice_index, int n_bytes)
static void	fsh_check_mem (fifo_segment_header_t *fsh)
int	fifo_segment_init (fifo_segment_t *fs)
	Initialize fifo segment shared header. More...
int	fifo_segment_create (fifo_segment_main_t *sm, fifo_segment_create_args_t *a)
	Create a fifo segment and initialize as master. More...
int	fifo_segment_attach (fifo_segment_main_t *sm, fifo_segment_create_args_t *a)
	Attach as slave to a fifo segment. More...
void	fifo_segment_delete (fifo_segment_main_t *sm, fifo_segment_t *s)
u32	fifo_segment_index (fifo_segment_main_t *sm, fifo_segment_t *s)
fifo_segment_t *	fifo_segment_get_segment (fifo_segment_main_t *sm, u32 segment_index)
void	fifo_segment_info (fifo_segment_t *seg, char **address, size_t *size)
void	fifo_segment_main_init (fifo_segment_main_t *sm, u64 baseva, u32 timeout_in_seconds)
static u32	fs_freelist_for_size (u32 size)
static u32	fs_freelist_index_to_size (u32 fl_index)
static int	fs_chunk_size_is_valid (fifo_segment_header_t *fsh, u32 size)
static svm_fifo_t *	fs_try_alloc_fifo_freelist (fifo_segment_slice_t *fss, u32 fl_index)
svm_fifo_chunk_t *	fs_try_alloc_multi_chunk (fifo_segment_header_t *fsh, fifo_segment_slice_t *fss, u32 data_bytes)
static svm_fifo_t *	fs_try_alloc_fifo_freelist_multi_chunk (fifo_segment_header_t *fsh, fifo_segment_slice_t *fss, u32 data_bytes)
static int	fsh_try_alloc_chunk_batch (fifo_segment_header_t *fsh, fifo_segment_slice_t *fss, u32 fl_index, u32 batch_size)
static int	fs_try_alloc_fifo_batch (fifo_segment_header_t *fsh, fifo_segment_slice_t *fss, u32 fl_index, u32 batch_size)
static svm_fifo_t *	fs_try_alloc_fifo (fifo_segment_header_t *fsh, fifo_segment_slice_t *fss, u32 data_bytes)
	Try to allocate new fifo. More...
svm_fifo_chunk_t *	fsh_alloc_chunk (fifo_segment_header_t *fsh, u32 slice_index, u32 chunk_size)
	Allocate chunks in fifo segment. More...
static void	fsh_slice_collect_chunks (fifo_segment_header_t *fsh, fifo_segment_slice_t *fss, svm_fifo_chunk_t *c)
void	fsh_collect_chunks (fifo_segment_header_t *fsh, u32 slice_index, svm_fifo_chunk_t *c)
	Return chunks to fifo segment. More...
static void	fss_fifo_add_active_list (fifo_segment_slice_t *fss, svm_fifo_t *f)
static void	fss_fifo_del_active_list (fifo_segment_slice_t *fss, svm_fifo_t *f)
svm_fifo_t *	fifo_segment_alloc_fifo_w_slice (fifo_segment_t *fs, u32 slice_index, u32 data_bytes, fifo_segment_ftype_t ftype)
	Allocate fifo in fifo segment. More...
void	fifo_segment_free_fifo (fifo_segment_t *fs, svm_fifo_t *f)
	Free fifo allocated in fifo segment. More...
void	fifo_segment_detach_fifo (fifo_segment_t *fs, svm_fifo_t *f)
void	fifo_segment_attach_fifo (fifo_segment_t *fs, svm_fifo_t *f, u32 slice_index)
int	fifo_segment_prealloc_fifo_hdrs (fifo_segment_t *fs, u32 slice_index, u32 batch_size)
	Try to preallocate fifo headers. More...
int	fifo_segment_prealloc_fifo_chunks (fifo_segment_t *fs, u32 slice_index, u32 chunk_size, u32 batch_size)
	Try to preallocate fifo chunks on segment. More...
void	fifo_segment_preallocate_fifo_pairs (fifo_segment_t *fs, u32 rx_fifo_size, u32 tx_fifo_size, u32 *n_fifo_pairs)
	Pre-allocates fifo pairs in fifo segment. More...
u32	fifo_segment_num_fifos (fifo_segment_t *fs)
	Get number of active fifos. More...
static u32	fs_slice_num_free_fifos (fifo_segment_slice_t *fss)
u32	fifo_segment_num_free_fifos (fifo_segment_t *fs)
static u32	fs_slice_num_free_chunks (fifo_segment_slice_t *fss, u32 size)
u32	fifo_segment_num_free_chunks (fifo_segment_t *fs, u32 size)
	Find number of free chunks of given size. More...
void	fifo_segment_update_free_bytes (fifo_segment_t *fs)
	Update fifo segment free bytes estimate. More...
uword	fifo_segment_size (fifo_segment_t *fs)
	Fifo segment allocated size. More...
u8	fsh_has_reached_mem_limit (fifo_segment_header_t *fsh)
	Fifo segment has reached mem limit. More...
void	fsh_reset_mem_limit (fifo_segment_header_t *fsh)
	Fifo segment reset mem limit flag. More...
uword	fifo_segment_free_bytes (fifo_segment_t *fs)
	Fifo segment estimate of number of free bytes. More...
uword	fifo_segment_cached_bytes (fifo_segment_t *fs)
	Fifo segment number of cached bytes. More...
uword	fifo_segment_available_bytes (fifo_segment_t *fs)
uword	fifo_segment_fl_chunk_bytes (fifo_segment_t *fs)
	Number of bytes on chunk free lists. More...
u8	fifo_segment_has_fifos (fifo_segment_t *fs)
svm_fifo_t *	fifo_segment_get_slice_fifo_list (fifo_segment_t *fs, u32 slice_index)
u8	fifo_segment_get_mem_usage (fifo_segment_t *fs)
fifo_segment_mem_status_t	fifo_segment_determine_status (fifo_segment_header_t *fsh, u8 usage)
fifo_segment_mem_status_t	fifo_segment_get_mem_status (fifo_segment_t *fs)
u8 *	format_fifo_segment_type (u8 *s, va_list *args)
u8 *	format_fifo_segment (u8 *s, va_list *args)
	Segment format function. More...

Variables
static char *	fifo_segment_mem_status_strings []

Function Documentation

fifo_segment_alloc_fifo_w_slice()

svm_fifo_t* fifo_segment_alloc_fifo_w_slice	(	fifo_segment_t *	fs,
		u32	slice_index,
		u32	data_bytes,
		fifo_segment_ftype_t	ftype
	)

Allocate fifo in fifo segment.

Parameters

fs	fifo segment for fifo
data_bytes	size of default fifo chunk in bytes
ftype	fifo type fifo_segment_ftype_t

Returns

new fifo or 0 if alloc failed

Definition at line 841 of file fifo_segment.c.

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fifo_segment_attach()

int fifo_segment_attach	(	fifo_segment_main_t *	sm,
		fifo_segment_create_args_t *	a
	)

Attach as slave to a fifo segment.

Definition at line 235 of file fifo_segment.c.

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fifo_segment_attach_fifo()

void fifo_segment_attach_fifo	(	fifo_segment_t *	fs,
		svm_fifo_t *	f,
		u32	slice_index
	)

Definition at line 958 of file fifo_segment.c.

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fifo_segment_available_bytes()

uword fifo_segment_available_bytes

(

fifo_segment_t *

fs

)

Definition at line 1276 of file fifo_segment.c.

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fifo_segment_cached_bytes()

uword fifo_segment_cached_bytes

(

fifo_segment_t *

fs

)

Fifo segment number of cached bytes.

Returns fifo segment's number of cached bytes.

Parameters

fs	fifo segment

Returns

cached bytes

Definition at line 1270 of file fifo_segment.c.

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fifo_segment_create()

int fifo_segment_create	(	fifo_segment_main_t *	sm,
		fifo_segment_create_args_t *	a
	)

Create a fifo segment and initialize as master.

Definition at line 201 of file fifo_segment.c.

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fifo_segment_delete()

void fifo_segment_delete	(	fifo_segment_main_t *	sm,
		fifo_segment_t *	s
	)

Definition at line 265 of file fifo_segment.c.

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fifo_segment_detach_fifo()

void fifo_segment_detach_fifo	(	fifo_segment_t *	fs,
		svm_fifo_t *	f
	)

Definition at line 935 of file fifo_segment.c.

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fifo_segment_determine_status()

fifo_segment_mem_status_t fifo_segment_determine_status	(	fifo_segment_header_t *	fsh,
		u8	usage
	)

Definition at line 1326 of file fifo_segment.c.

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fifo_segment_fl_chunk_bytes()

uword fifo_segment_fl_chunk_bytes

(

fifo_segment_t *

fs

)

Number of bytes on chunk free lists.

Parameters

fs	fifo segment

Returns

free bytes on chunk free lists

Definition at line 1282 of file fifo_segment.c.

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fifo_segment_free_bytes()

uword fifo_segment_free_bytes

(

fifo_segment_t *

fs

)

Fifo segment estimate of number of free bytes.

Returns fifo segment's internal estimate of the number of free bytes. To force a synchronization between the segment and the underlying memory allocator, call fifo_segment_update_free_bytes

Parameters

fs	fifo segment

Returns

free bytes estimate

Definition at line 1264 of file fifo_segment.c.

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fifo_segment_free_fifo()

void fifo_segment_free_fifo	(	fifo_segment_t *	fs,
		svm_fifo_t *	f
	)

Free fifo allocated in fifo segment.

Parameters

fs	fifo segment for fifo
f	fifo to be freed

Definition at line 889 of file fifo_segment.c.

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fifo_segment_get_mem_status()

fifo_segment_mem_status_t fifo_segment_get_mem_status

(

fifo_segment_t *

fs

)

Definition at line 1352 of file fifo_segment.c.

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fifo_segment_get_mem_usage()

u8 fifo_segment_get_mem_usage

(

fifo_segment_t *

fs

)

Definition at line 1315 of file fifo_segment.c.

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fifo_segment_get_segment()

fifo_segment_t* fifo_segment_get_segment	(	fifo_segment_main_t *	sm,
		u32	segment_index
	)

Definition at line 279 of file fifo_segment.c.

fifo_segment_get_slice_fifo_list()

svm_fifo_t* fifo_segment_get_slice_fifo_list	(	fifo_segment_t *	fs,
		u32	slice_index
	)

Definition at line 1305 of file fifo_segment.c.

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fifo_segment_has_fifos()

u8 fifo_segment_has_fifos

(

fifo_segment_t *

fs

)

Definition at line 1299 of file fifo_segment.c.

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fifo_segment_index()

u32 fifo_segment_index	(	fifo_segment_main_t *	sm,
		fifo_segment_t *	s
	)

Definition at line 273 of file fifo_segment.c.

fifo_segment_info()

void fifo_segment_info	(	fifo_segment_t *	seg,
		char **	address,
		size_t *	size
	)

Definition at line 285 of file fifo_segment.c.

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fifo_segment_init()

int fifo_segment_init

(

fifo_segment_t *

fs

)

Initialize fifo segment shared header.

Definition at line 143 of file fifo_segment.c.

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fifo_segment_main_init()

void fifo_segment_main_init	(	fifo_segment_main_t *	sm,
		u64	baseva,
		u32	timeout_in_seconds
	)

Definition at line 292 of file fifo_segment.c.

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fifo_segment_num_fifos()

u32 fifo_segment_num_fifos

(

fifo_segment_t *

fs

)

Get number of active fifos.

Definition at line 1141 of file fifo_segment.c.

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fifo_segment_num_free_chunks()

u32 fifo_segment_num_free_chunks	(	fifo_segment_t *	fs,
		u32	size
	)

Find number of free chunks of given size.

Parameters

fs	fifo segment
size	chunk size of interest or ~0 if all should be counted

Returns

number of chunks of given size

Definition at line 1224 of file fifo_segment.c.

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fifo_segment_num_free_fifos()

u32 fifo_segment_num_free_fifos

(

fifo_segment_t *

fs

)

Definition at line 1165 of file fifo_segment.c.

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fifo_segment_prealloc_fifo_chunks()

int fifo_segment_prealloc_fifo_chunks	(	fifo_segment_t *	fs,
		u32	slice_index,
		u32	chunk_size,
		u32	batch_size
	)

Try to preallocate fifo chunks on segment.

Tries to preallocate chunks of requested size on segment and adds them to chunk freelist.

Parameters

fs	fifo segment
chunk_size	size of chunks to be allocated in bytes
batch_size	number of chunks to be allocated

Returns

0 on success, negative number otherwise

Definition at line 1021 of file fifo_segment.c.

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fifo_segment_prealloc_fifo_hdrs()

int fifo_segment_prealloc_fifo_hdrs	(	fifo_segment_t *	fs,
		u32	slice_index,
		u32	batch_size
	)

Try to preallocate fifo headers.

Tries to preallocate fifo headers and adds them to freelist.

Parameters

fs	fifo segment
batch_size	number of chunks to be allocated

Returns

0 on success, negative number otherwise

Definition at line 981 of file fifo_segment.c.

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fifo_segment_preallocate_fifo_pairs()

void fifo_segment_preallocate_fifo_pairs	(	fifo_segment_t *	fs,
		u32	rx_fifo_size,
		u32	tx_fifo_size,
		u32 *	n_fifo_pairs
	)

Pre-allocates fifo pairs in fifo segment.

The number of fifos pre-allocated is the minimum of the requested number of pairs and the maximum number that fit within the segment. If the maximum is hit, the number of fifo pairs requested is updated by subtracting the number of fifos that have been successfully allocated.

Parameters

fs	fifo segment for fifo
rx_fifo_size	data size of rx fifos
tx_fifo_size	data size of tx fifos
n_fifo_pairs	number of pairs requested. Prior to returning, this is decremented by the the number of pairs allocated.

Definition at line 1078 of file fifo_segment.c.

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fifo_segment_size()

uword fifo_segment_size

(

fifo_segment_t *

fs

)

Fifo segment allocated size.

Returns fifo segment's allocated size

Parameters

fs	fifo segment

Returns

allocated size in bytes

Definition at line 1246 of file fifo_segment.c.

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fifo_segment_update_free_bytes()

void fifo_segment_update_free_bytes

(

fifo_segment_t *

fs

)

Update fifo segment free bytes estimate.

Forces fifo segment free bytes estimate synchronization with underlying memory allocator.

Parameters

fs	fifo segment

Definition at line 1240 of file fifo_segment.c.

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format_fifo_segment()

u8* format_fifo_segment	(	u8 *	s,
		va_list *	args
	)

Segment format function.

Definition at line 1382 of file fifo_segment.c.

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format_fifo_segment_type()

u8* format_fifo_segment_type	(	u8 *	s,
		va_list *	args
	)

Definition at line 1361 of file fifo_segment.c.

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fs_chunk_size_is_valid()

static int fs_chunk_size_is_valid ( fifo_segment_header_t *  fsh, u32  size  )

inlinestatic

Definition at line 314 of file fifo_segment.c.

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fs_freelist_for_size()

static u32 fs_freelist_for_size ( u32  size )

inlinestatic

Definition at line 300 of file fifo_segment.c.

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fs_freelist_index_to_size()

static u32 fs_freelist_index_to_size ( u32  fl_index )

inlinestatic

Definition at line 308 of file fifo_segment.c.

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fs_slice_num_free_chunks()

static u32 fs_slice_num_free_chunks ( fifo_segment_slice_t *  fss, u32  size  )

static

Definition at line 1181 of file fifo_segment.c.

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fs_slice_num_free_fifos()

static u32 fs_slice_num_free_fifos ( fifo_segment_slice_t *  fss )

static

Definition at line 1147 of file fifo_segment.c.

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fs_try_alloc_fifo()

static svm_fifo_t* fs_try_alloc_fifo ( fifo_segment_header_t *  fsh, fifo_segment_slice_t *  fss, u32  data_bytes  )

static

Try to allocate new fifo.

Tries the following steps in order:

• grab fifo and chunk from freelists
• batch fifo and chunk allocation
• single fifo allocation
• grab multiple fifo chunks from freelists

Definition at line 616 of file fifo_segment.c.

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fs_try_alloc_fifo_batch()

static int fs_try_alloc_fifo_batch ( fifo_segment_header_t *  fsh, fifo_segment_slice_t *  fss, u32  fl_index, u32  batch_size  )

static

Definition at line 549 of file fifo_segment.c.

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fs_try_alloc_fifo_freelist()

static svm_fifo_t* fs_try_alloc_fifo_freelist ( fifo_segment_slice_t *  fss, u32  fl_index  )

static

Definition at line 325 of file fifo_segment.c.

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fs_try_alloc_fifo_freelist_multi_chunk()

static svm_fifo_t* fs_try_alloc_fifo_freelist_multi_chunk ( fifo_segment_header_t *  fsh, fifo_segment_slice_t *  fss, u32  data_bytes  )

static

Definition at line 412 of file fifo_segment.c.

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fs_try_alloc_multi_chunk()

svm_fifo_chunk_t* fs_try_alloc_multi_chunk	(	fifo_segment_header_t *	fsh,
		fifo_segment_slice_t *	fss,
		u32	data_bytes
	)

Definition at line 349 of file fifo_segment.c.

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fsh_active_fifos_update()

static void fsh_active_fifos_update ( fifo_segment_header_t *  fsh, int  inc  )

inlinestatic

Definition at line 88 of file fifo_segment.c.

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fsh_alloc_chunk()

svm_fifo_chunk_t* fsh_alloc_chunk	(	fifo_segment_header_t *	fsh,
		u32	slice_index,
		u32	chunk_size
	)

Allocate chunks in fifo segment.

Parameters

fsh	fifo segment header
slice_index	slice where chunks should be alocated
chunk_size	chunk size needed

Returns

chunk (or chunks) that cover at least chunk_size bytes on success, 0 on failure.

Definition at line 695 of file fifo_segment.c.

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fsh_cached_bytes_add()

static void fsh_cached_bytes_add ( fifo_segment_header_t *  fsh, int  size  )

inlinestatic

Definition at line 69 of file fifo_segment.c.

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fsh_cached_bytes_sub()

static void fsh_cached_bytes_sub ( fifo_segment_header_t *  fsh, int  size  )

inlinestatic

Definition at line 75 of file fifo_segment.c.

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fsh_check_mem()

static void fsh_check_mem ( fifo_segment_header_t *  fsh )

static

Definition at line 123 of file fifo_segment.c.

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fsh_collect_chunks()

void fsh_collect_chunks	(	fifo_segment_header_t *	fsh,
		u32	slice_index,
		svm_fifo_chunk_t *	c
	)

Return chunks to fifo segment.

Parameters

fsh	fifo segment header
slice_index	slice where chunks should be returned
c	pointer to first chunk in 0 terminated linked list

Definition at line 804 of file fifo_segment.c.

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fsh_free_bytes_sub()

static void fsh_free_bytes_sub ( fifo_segment_header_t *  fsh, int  size  )

inlinestatic

Definition at line 50 of file fifo_segment.c.

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fsh_free_space()

static uword fsh_free_space ( fifo_segment_header_t *  fsh )

static

Fifo segment free space.

Queries the underlying memory manager, dlmalloc, for free space. Since this ends up walking the internal data structures, it should not be called indiscriminately.

Parameters

fs	fifo segment

Returns

number of free bytes

Definition at line 41 of file fifo_segment.c.

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fsh_has_reached_mem_limit()

u8 fsh_has_reached_mem_limit

(

fifo_segment_header_t *

fsh

)

Fifo segment has reached mem limit.

Parameters

fsh	fifo segment header

Returns

1 (if reached) or 0 (otherwise)

Definition at line 1252 of file fifo_segment.c.

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fsh_n_active_fifos()

static u32 fsh_n_active_fifos ( fifo_segment_header_t *  fsh )

inlinestatic

Definition at line 94 of file fifo_segment.c.

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fsh_n_cached_bytes()

static uword fsh_n_cached_bytes ( fifo_segment_header_t *  fsh )

inlinestatic

Definition at line 81 of file fifo_segment.c.

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fsh_n_free_bytes()

static uword fsh_n_free_bytes ( fifo_segment_header_t *  fsh )

inlinestatic

Definition at line 56 of file fifo_segment.c.

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fsh_reset_mem_limit()

void fsh_reset_mem_limit

(

fifo_segment_header_t *

fsh

)

Fifo segment reset mem limit flag.

Parameters

fs	fifo segment

Definition at line 1258 of file fifo_segment.c.

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fsh_slice_collect_chunks()

static void fsh_slice_collect_chunks ( fifo_segment_header_t *  fsh, fifo_segment_slice_t *  fss, svm_fifo_chunk_t *  c  )

static

Definition at line 776 of file fifo_segment.c.

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fsh_slice_get()

static fifo_segment_slice_t* fsh_slice_get ( fifo_segment_header_t *  fsh, u32  slice_index  )

inlinestatic

Definition at line 19 of file fifo_segment.c.

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fsh_try_alloc_chunk_batch()

static int fsh_try_alloc_chunk_batch ( fifo_segment_header_t *  fsh, fifo_segment_slice_t *  fss, u32  fl_index, u32  batch_size  )

static

Definition at line 503 of file fifo_segment.c.

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fsh_update_free_bytes()

static void fsh_update_free_bytes ( fifo_segment_header_t *  fsh )

inlinestatic

Definition at line 63 of file fifo_segment.c.

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fsh_virtual_mem()

static uword fsh_virtual_mem ( fifo_segment_header_t *  fsh )

inlinestatic

Definition at line 100 of file fifo_segment.c.

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fsh_virtual_mem_update()

void fsh_virtual_mem_update	(	fifo_segment_header_t *	fsh,
		u32	slice_index,
		int	n_bytes
	)

Definition at line 115 of file fifo_segment.c.

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fss_fifo_add_active_list()

static void fss_fifo_add_active_list ( fifo_segment_slice_t *  fss, svm_fifo_t *  f  )

inlinestatic

Definition at line 813 of file fifo_segment.c.

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fss_fifo_del_active_list()

static void fss_fifo_del_active_list ( fifo_segment_slice_t *  fss, svm_fifo_t *  f  )

inlinestatic

Definition at line 824 of file fifo_segment.c.

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Variable Documentation

fifo_segment_mem_status_strings

char* fifo_segment_mem_status_strings[]

static

Initial value:

= {
#define _(sym,str) 
  foreach_segment_mem_status

}

Definition at line 24 of file fifo_segment.c.