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Speed up for multi-arg cases of scm_ramap functions

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This patch results in a 20%-40% speedup in the > 1 argument cases of
the following microbenchmarks:

(define A (make-shared-array #0(1) (const '()) #e1e7))
; 1, 2, 3 arguments.
(define a 0) ,time (array-for-each (lambda (b) (set! a (+ a b))) A)
(define a 0) ,time (array-for-each (lambda (b c) (set! a (+ a b c))) A A)
(define a 0) ,time (array-for-each (lambda (b c d) (set! a (+ a b c d))) A A A)

(define A (make-shared-array (make-array 1) (const '()) #e1e7))
(define B (make-shared-array #0(1) (const '()) #e1e7))
; 1, 2, 3 arguments.
,time (array-map! A + B)
,time (array-map! A + B B)
,time (array-map! A + B B B)

* libguile/array-map.c (scm_ramap): Note on cproc arguments.

  (rafill): Assume that dst's lbnd is 0.

  (racp): Assume that src's lbnd is 0.

  (ramap): Assume that ra0's lbnd is 0. When there're more than two
  arguments, compute the array handles before the loop. Allocate the arg
  list once and reuse it in the loop.

  (rafe): Do as in ramap(), when there's more than one argument.

  (AREF, ASET): Remove.
This commit is contained in:
Daniel Llorens 2015-02-13 18:42:27 +01:00
parent fa40c288ca
commit 31e9f8b974
3 changed files with 77 additions and 65 deletions
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136
libguile/array-map.c
View file

@ -1,5 +1,5 @@
/* Copyright (C) 1996, 1998, 2000, 2001, 2004, 2005, 2006, 2008, 2009,
* 2010, 2011, 2012, 2013, 2014 Free Software Foundation, Inc.
* 2010, 2011, 2012, 2013, 2014, 2015 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
@ -46,18 +46,6 @@
/* The WHAT argument for `scm_gc_malloc ()' et al. */
static const char vi_gc_hint[] = "array-indices";
static SCM
AREF (SCM v, size_t pos)
{
return scm_c_array_ref_1 (v, pos);
}
static void
ASET (SCM v, size_t pos, SCM val)
{
scm_c_array_set_1_x (v, val, pos);
}
static SCM
make1array (SCM v, ssize_t inc)
{
@ -98,6 +86,10 @@ cindk (SCM ra, ssize_t *ve, int kend)
#define LBND(ra, k) SCM_I_ARRAY_DIMS (ra)[k].lbnd
#define UBND(ra, k) SCM_I_ARRAY_DIMS (ra)[k].ubnd
/* scm_ramapc() always calls cproc with rank-1 arrays created by
make1array. cproc (rafe, ramap, rafill, racp) can assume that the
dims[0].lbnd of these arrays is always 0. */
int
scm_ramapc (void *cproc_ptr, SCM data, SCM ra0, SCM lra, const char *what)
{
@ -166,7 +158,7 @@ scm_ramapc (void *cproc_ptr, SCM data, SCM ra0, SCM lra, const char *what)
scm_misc_error (what, "array shape mismatch: ~S", scm_list_1 (ra0));
va1 = make1array (ra1, 1);
if (LBND (ra0, 0) < LBND (va1, 0) || UBND (ra0, 0) > UBND (va1, 0))
if (LBND (ra0, 0) < 0 /* LBND (va1, 0) */ || UBND (ra0, 0) > UBND (va1, 0))
scm_misc_error (what, "array shape mismatch: ~S", scm_list_1 (ra0));
}
*plva = scm_cons (va1, SCM_EOL);
@ -223,14 +215,12 @@ scm_ramapc (void *cproc_ptr, SCM data, SCM ra0, SCM lra, const char *what)
static int
rafill (SCM dst, SCM fill)
{
size_t n = SCM_I_ARRAY_DIMS (dst)->ubnd + 1;
size_t i = SCM_I_ARRAY_BASE (dst);
ssize_t inc = SCM_I_ARRAY_DIMS (dst)->inc;
scm_t_array_handle h;
size_t n, i;
ssize_t inc;
scm_array_get_handle (SCM_I_ARRAY_V (dst), &h);
i = SCM_I_ARRAY_BASE (dst);
inc = SCM_I_ARRAY_DIMS (dst)->inc;
n = (SCM_I_ARRAY_DIMS (dst)->ubnd - SCM_I_ARRAY_DIMS (dst)->lbnd + 1);
dst = SCM_I_ARRAY_V (dst);
scm_array_get_handle (dst, &h);
for (; n-- > 0; i += inc)
h.vset (h.vector, i, fill);
@ -254,19 +244,17 @@ SCM_DEFINE (scm_array_fill_x, "array-fill!", 2, 0, 0,
static int
racp (SCM src, SCM dst)
{
scm_t_array_handle h_s, h_d;
size_t n, i_s, i_d;
size_t i_s, i_d, n;
ssize_t inc_s, inc_d;
scm_t_array_handle h_s, h_d;
dst = SCM_CAR (dst);
i_s = SCM_I_ARRAY_BASE (src);
i_d = SCM_I_ARRAY_BASE (dst);
n = (SCM_I_ARRAY_DIMS (src)->ubnd + 1);
inc_s = SCM_I_ARRAY_DIMS (src)->inc;
inc_d = SCM_I_ARRAY_DIMS (dst)->inc;
n = (SCM_I_ARRAY_DIMS (src)->ubnd - SCM_I_ARRAY_DIMS (src)->lbnd + 1);
src = SCM_I_ARRAY_V (src);
dst = SCM_I_ARRAY_V (dst);
scm_array_get_handle (src, &h_s);
scm_array_get_handle (dst, &h_d);
@ -309,44 +297,56 @@ SCM_DEFINE (scm_array_copy_x, "array-copy!", 2, 0, 0,
static int
ramap (SCM ra0, SCM proc, SCM ras)
{
size_t i0 = SCM_I_ARRAY_BASE (ra0);
ssize_t inc0 = SCM_I_ARRAY_DIMS (ra0)->inc;
size_t n = SCM_I_ARRAY_DIMS (ra0)->ubnd + 1;
scm_t_array_handle h0;
size_t n, i0;
ssize_t i, inc0;
i0 = SCM_I_ARRAY_BASE (ra0);
inc0 = SCM_I_ARRAY_DIMS (ra0)->inc;
i = SCM_I_ARRAY_DIMS (ra0)->lbnd;
n = SCM_I_ARRAY_DIMS (ra0)->ubnd - i + 1;
ra0 = SCM_I_ARRAY_V (ra0);
scm_array_get_handle (ra0, &h0);
if (scm_is_null (ras))
for (; n--; i0 += inc0)
h0.vset (h0.vector, i0, scm_call_0 (proc));
else
{
SCM ra1 = SCM_CAR (ras);
size_t i1 = SCM_I_ARRAY_BASE (ra1);
ssize_t inc1 = SCM_I_ARRAY_DIMS (ra1)->inc;
scm_t_array_handle h1;
size_t i1;
ssize_t inc1;
i1 = SCM_I_ARRAY_BASE (ra1);
inc1 = SCM_I_ARRAY_DIMS (ra1)->inc;
ras = SCM_CDR (ras);
ra1 = SCM_I_ARRAY_V (ra1);
scm_array_get_handle (ra1, &h1);
ras = SCM_CDR (ras);
if (scm_is_null (ras))
for (; n--; i0 += inc0, i1 += inc1)
h0.vset (h0.vector, i0, scm_call_1 (proc, h1.vref (h1.vector, i1)));
else
{
ras = scm_vector (ras);
for (; n--; i0 += inc0, i1 += inc1, ++i)
scm_t_array_handle *hs;
size_t restn = scm_ilength (ras);
SCM args = SCM_EOL;
SCM *p = &args;
SCM **sa = scm_gc_malloc (sizeof(SCM *) * restn, vi_gc_hint);
for (size_t k = 0; k < restn; ++k)
{
SCM args = SCM_EOL;
unsigned long k;
for (k = scm_c_vector_length (ras); k--;)
args = scm_cons (AREF (scm_c_vector_ref (ras, k), i), args);
h0.vset (h0.vector, i0,
scm_apply_1 (proc, h1.vref (h1.vector, i1), args));
*p = scm_cons (SCM_UNSPECIFIED, SCM_EOL);
sa[k] = SCM_CARLOC (*p);
p = SCM_CDRLOC (*p);
}
hs = scm_gc_malloc (sizeof(scm_t_array_handle) * restn, vi_gc_hint);
for (size_t k = 0; k < restn; ++k, ras = scm_cdr (ras))
scm_array_get_handle (scm_car (ras), hs+k);
for (ssize_t i = 0; n--; i0 += inc0, i1 += inc1, ++i)
{
for (size_t k = 0; k < restn; ++k)
*(sa[k]) = scm_array_handle_ref (hs+k, i*hs[k].dims[0].inc);
h0.vset (h0.vector, i0, scm_apply_1 (proc, h1.vref (h1.vector, i1), args));
}
for (size_t k = 0; k < restn; ++k)
scm_array_handle_release (hs+k);
}
scm_array_handle_release (&h1);
}
@ -383,30 +383,44 @@ SCM_DEFINE (scm_array_map_x, "array-map!", 2, 0, 1,
static int
rafe (SCM ra0, SCM proc, SCM ras)
{
ssize_t i = SCM_I_ARRAY_DIMS (ra0)->lbnd;
size_t n = SCM_I_ARRAY_DIMS (ra0)->ubnd - i + 1;
size_t i0 = SCM_I_ARRAY_BASE (ra0);
ssize_t inc0 = SCM_I_ARRAY_DIMS (ra0)->inc;
size_t n = SCM_I_ARRAY_DIMS (ra0)->ubnd + 1;
scm_t_array_handle h0;
size_t i0;
ssize_t inc0;
i0 = SCM_I_ARRAY_BASE (ra0);
inc0 = SCM_I_ARRAY_DIMS (ra0)->inc;
ra0 = SCM_I_ARRAY_V (ra0);
scm_array_get_handle (ra0, &h0);
if (scm_is_null (ras))
for (; n--; i0 += inc0)
scm_call_1 (proc, h0.vref (h0.vector, i0));
else
{
ras = scm_vector (ras);
for (; n--; i0 += inc0, ++i)
scm_t_array_handle *hs;
size_t restn = scm_ilength (ras);
SCM args = SCM_EOL;
SCM *p = &args;
SCM **sa = scm_gc_malloc (sizeof(SCM *) * restn, vi_gc_hint);
for (size_t k = 0; k < restn; ++k)
{
SCM args = SCM_EOL;
unsigned long k;
for (k = scm_c_vector_length (ras); k--;)
args = scm_cons (AREF (scm_c_vector_ref (ras, k), i), args);
*p = scm_cons (SCM_UNSPECIFIED, SCM_EOL);
sa[k] = SCM_CARLOC (*p);
p = SCM_CDRLOC (*p);
}
hs = scm_gc_malloc (sizeof(scm_t_array_handle) * restn, vi_gc_hint);
for (size_t k = 0; k < restn; ++k, ras = scm_cdr (ras))
scm_array_get_handle (scm_car (ras), hs+k);
for (ssize_t i = 0; n--; i0 += inc0, ++i)
{
for (size_t k = 0; k < restn; ++k)
*(sa[k]) = scm_array_handle_ref (hs+k, i*hs[k].dims[0].inc);
scm_apply_1 (proc, h0.vref (h0.vector, i0), args);
}
for (size_t k = 0; k < restn; ++k)
scm_array_handle_release (hs+k);
}
scm_array_handle_release (&h0);
return 1;
@ -444,15 +458,12 @@ static void
array_index_map_n (SCM ra, SCM proc)
{
scm_t_array_handle h;
size_t i;
int k, kmax = SCM_I_ARRAY_NDIM (ra) - 1;
ssize_t *vi;
SCM **si;
SCM args = SCM_EOL;
SCM *p = &args;
vi = scm_gc_malloc_pointerless (sizeof(ssize_t) * (kmax + 1), vi_gc_hint);
si = scm_gc_malloc_pointerless (sizeof(SCM *) * (kmax + 1), vi_gc_hint);
ssize_t *vi = scm_gc_malloc_pointerless (sizeof(ssize_t) * (kmax + 1), vi_gc_hint);
SCM **si = scm_gc_malloc_pointerless (sizeof(SCM *) * (kmax + 1), vi_gc_hint);
for (k = 0; k <= kmax; k++)
{
@ -470,6 +481,7 @@ array_index_map_n (SCM ra, SCM proc)
{
if (k == kmax)
{
size_t i;
vi[kmax] = SCM_I_ARRAY_DIMS (ra)[kmax].lbnd;
i = cindk (ra, vi, kmax+1);
for (; vi[kmax] <= SCM_I_ARRAY_DIMS (ra)[kmax].ubnd; ++vi[kmax])