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OpenACC 2.6 deep copy: libgomp parts 

include/
	* gomp-constants.h (GOMP_MAP_FLAG_SPECIAL_4, GOMP_MAP_DEEP_COPY):
	Define.
	(gomp_map_kind): Add GOMP_MAP_ATTACH, GOMP_MAP_DETACH,
	GOMP_MAP_FORCE_DETACH.

	libgomp/
	* libgomp.h (struct target_var_desc): Add do_detach flag.
	* oacc-init.c (acc_shutdown_1): Free aux block if present.
	* oacc-mem.c (find_group_last): Add SIZES parameter. Support
	struct components.  Tidy up and add some new checks.
	(goacc_enter_data_internal): Update call to find_group_last.
	(goacc_exit_data_internal): Support detach operations and
	GOMP_MAP_STRUCT.
	(GOACC_enter_exit_data): Handle initial GOMP_MAP_STRUCT or
	GOMP_MAP_FORCE_PRESENT in finalization detection code.  Handle
	attach/detach in enter/exit data detection code.
	* target.c (gomp_map_vars_existing): Initialise do_detach field of
	tgt_var_desc.
	(gomp_map_vars_internal): Support attach.
	(gomp_unmap_vars_internal): Support detach.

From-SVN: r279625
This commit is contained in:
Julian Brown 2019-12-20 01:20:30 +00:00 committed by Julian Brown
parent 5d5be7bfb5
commit 8e7e71ff24
6 changed files with 196 additions and 19 deletions
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7
include/ChangeLog
View File

@ -1,3 +1,10 @@
2019-12-19 Julian Brown <julian@codesourcery.com>
* gomp-constants.h (GOMP_MAP_FLAG_SPECIAL_4, GOMP_MAP_DEEP_COPY):
Define.
(gomp_map_kind): Add GOMP_MAP_ATTACH, GOMP_MAP_DETACH,
GOMP_MAP_FORCE_DETACH.
2019-12-19 Julian Brown <julian@codesourcery.com>
Maciej W. Rozycki <macro@codesourcery.com>
Tobias Burnus <tobias@codesourcery.com>

10
include/gomp-constants.h
View File

@ -40,8 +40,11 @@
#define GOMP_MAP_FLAG_SPECIAL_0 (1 << 2)
#define GOMP_MAP_FLAG_SPECIAL_1 (1 << 3)
#define GOMP_MAP_FLAG_SPECIAL_2 (1 << 4)
#define GOMP_MAP_FLAG_SPECIAL_4 (1 << 6)
#define GOMP_MAP_FLAG_SPECIAL (GOMP_MAP_FLAG_SPECIAL_1 \
| GOMP_MAP_FLAG_SPECIAL_0)
#define GOMP_MAP_DEEP_COPY (GOMP_MAP_FLAG_SPECIAL_4 \
| GOMP_MAP_FLAG_SPECIAL_2)
/* Flag to force a specific behavior (or else, trigger a run-time error). */
#define GOMP_MAP_FLAG_FORCE (1 << 7)
@ -129,6 +132,13 @@ enum gomp_map_kind
/* Decrement usage count and deallocate if zero. */
GOMP_MAP_RELEASE = (GOMP_MAP_FLAG_SPECIAL_2
| GOMP_MAP_DELETE),
/* In OpenACC, attach a pointer to a mapped struct field. */
GOMP_MAP_ATTACH = (GOMP_MAP_DEEP_COPY | 0),
/* In OpenACC, detach a pointer to a mapped struct field. */
GOMP_MAP_DETACH = (GOMP_MAP_DEEP_COPY | 1),
/* In OpenACC, detach a pointer to a mapped struct field. */
GOMP_MAP_FORCE_DETACH = (GOMP_MAP_DEEP_COPY
| GOMP_MAP_FLAG_FORCE | 1),
/* Internal to GCC, not used in libgomp. */
/* Do not map, but pointer assign a pointer instead. */

17
libgomp/ChangeLog
View File

@ -1,3 +1,20 @@
2019-12-19 Julian Brown <julian@codesourcery.com>
* libgomp.h (struct target_var_desc): Add do_detach flag.
* oacc-init.c (acc_shutdown_1): Free aux block if present.
* oacc-mem.c (find_group_last): Add SIZES parameter. Support
struct components. Tidy up and add some new checks.
(goacc_enter_data_internal): Update call to find_group_last.
(goacc_exit_data_internal): Support detach operations and
GOMP_MAP_STRUCT.
(GOACC_enter_exit_data): Handle initial GOMP_MAP_STRUCT or
GOMP_MAP_FORCE_PRESENT in finalization detection code. Handle
attach/detach in enter/exit data detection code.
* target.c (gomp_map_vars_existing): Initialise do_detach field of
tgt_var_desc.
(gomp_map_vars_internal): Support attach.
(gomp_unmap_vars_internal): Support detach.
2019-12-19 Julian Brown <julian@codesourcery.com>
Thomas Schwinge <thomas@codesourcery.com>

2
libgomp/libgomp.h
View File

@ -948,6 +948,8 @@ struct target_var_desc {
bool copy_from;
/* True if data always should be copied from device to host at the end. */
bool always_copy_from;
/* True if variable should be detached at end of region. */
bool do_detach;
/* Relative offset against key host_start. */
uintptr_t offset;
/* Actual length. */

128
libgomp/oacc-mem.c
View File

@ -957,33 +957,48 @@ acc_detach_finalize_async (void **hostaddr, int async)
mappings. */
static int
find_group_last (int pos, size_t mapnum, unsigned short *kinds)
find_group_last (int pos, size_t mapnum, size_t *sizes, unsigned short *kinds)
{
unsigned char kind0 = kinds[pos] & 0xff;
int first_pos = pos, last_pos = pos;
int first_pos = pos;
if (kind0 == GOMP_MAP_TO_PSET)
switch (kind0)
{
case GOMP_MAP_TO_PSET:
while (pos + 1 < mapnum && (kinds[pos + 1] & 0xff) == GOMP_MAP_POINTER)
last_pos = ++pos;
pos++;
/* We expect at least one GOMP_MAP_POINTER after a GOMP_MAP_TO_PSET. */
assert (last_pos > first_pos);
}
else
{
assert (pos > first_pos);
break;
case GOMP_MAP_STRUCT:
pos += sizes[pos];
break;
case GOMP_MAP_POINTER:
case GOMP_MAP_ALWAYS_POINTER:
/* These mappings are only expected after some other mapping. If we
see one by itself, something has gone wrong. */
gomp_fatal ("unexpected mapping");
break;
default:
/* GOMP_MAP_ALWAYS_POINTER can only appear directly after some other
mapping. */
if (pos + 1 < mapnum
&& (kinds[pos + 1] & 0xff) == GOMP_MAP_ALWAYS_POINTER)
return pos + 1;
if (pos + 1 < mapnum)
{
unsigned char kind1 = kinds[pos + 1] & 0xff;
if (kind1 == GOMP_MAP_ALWAYS_POINTER)
return pos + 1;
}
/* We can have one or several GOMP_MAP_POINTER mappings after a to/from
/* We can have zero or more GOMP_MAP_POINTER mappings after a to/from
(etc.) mapping. */
while (pos + 1 < mapnum && (kinds[pos + 1] & 0xff) == GOMP_MAP_POINTER)
last_pos = ++pos;
pos++;
}
return last_pos;
return pos;
}
/* Map variables for OpenACC "enter data". We can't just call
@ -997,7 +1012,7 @@ goacc_enter_data_internal (struct gomp_device_descr *acc_dev, size_t mapnum,
{
for (size_t i = 0; i < mapnum; i++)
{
int group_last = find_group_last (i, mapnum, kinds);
int group_last = find_group_last (i, mapnum, sizes, kinds);
gomp_map_vars_async (acc_dev, aq,
(group_last - i) + 1,
@ -1018,6 +1033,37 @@ goacc_exit_data_internal (struct gomp_device_descr *acc_dev, size_t mapnum,
{
gomp_mutex_lock (&acc_dev->lock);
/* Handle "detach" before copyback/deletion of mapped data. */
for (size_t i = 0; i < mapnum; ++i)
{
unsigned char kind = kinds[i] & 0xff;
bool finalize = false;
switch (kind)
{
case GOMP_MAP_FORCE_DETACH:
finalize = true;
/* Fallthrough. */
case GOMP_MAP_DETACH:
{
struct splay_tree_key_s cur_node;
uintptr_t hostaddr = (uintptr_t) hostaddrs[i];
cur_node.host_start = hostaddr;
cur_node.host_end = cur_node.host_start + sizeof (void *);
splay_tree_key n
= splay_tree_lookup (&acc_dev->mem_map, &cur_node);
if (n == NULL)
gomp_fatal ("struct not mapped for detach operation");
gomp_detach_pointer (acc_dev, aq, n, hostaddr, finalize, NULL);
}
break;
default:
;
}
}
for (size_t i = 0; i < mapnum; ++i)
{
unsigned char kind = kinds[i] & 0xff;
@ -1025,7 +1071,8 @@ goacc_exit_data_internal (struct gomp_device_descr *acc_dev, size_t mapnum,
bool finalize = false;
if (kind == GOMP_MAP_FORCE_FROM
|| kind == GOMP_MAP_DELETE)
|| kind == GOMP_MAP_DELETE
|| kind == GOMP_MAP_FORCE_DETACH)
finalize = true;
switch (kind)
@ -1040,10 +1087,14 @@ goacc_exit_data_internal (struct gomp_device_descr *acc_dev, size_t mapnum,
case GOMP_MAP_POINTER:
case GOMP_MAP_DELETE:
case GOMP_MAP_RELEASE:
case GOMP_MAP_DETACH:
case GOMP_MAP_FORCE_DETACH:
{
struct splay_tree_key_s cur_node;
size_t size;
if (kind == GOMP_MAP_POINTER)
if (kind == GOMP_MAP_POINTER
|| kind == GOMP_MAP_DETACH
|| kind == GOMP_MAP_FORCE_DETACH)
size = sizeof (void *);
else
size = sizes[i];
@ -1083,6 +1134,42 @@ goacc_exit_data_internal (struct gomp_device_descr *acc_dev, size_t mapnum,
gomp_remove_var_async (acc_dev, n, aq);
}
break;
case GOMP_MAP_STRUCT:
{
int elems = sizes[i];
for (int j = 1; j <= elems; j++)
{
struct splay_tree_key_s k;
k.host_start = (uintptr_t) hostaddrs[i + j];
k.host_end = k.host_start + sizes[i + j];
splay_tree_key str;
str = splay_tree_lookup (&acc_dev->mem_map, &k);
if (str)
{
if (finalize)
{
if (str->refcount != REFCOUNT_INFINITY)
str->refcount -= str->virtual_refcount;
str->virtual_refcount = 0;
}
if (str->virtual_refcount > 0)
{
if (str->refcount != REFCOUNT_INFINITY)
str->refcount--;
str->virtual_refcount--;
}
else if (str->refcount > 0
&& str->refcount != REFCOUNT_INFINITY)
str->refcount--;
if (str->refcount == 0)
gomp_remove_var_async (acc_dev, str, aq);
}
}
i += elems;
}
break;
default:
gomp_fatal (">>>> goacc_exit_data_internal UNHANDLED kind 0x%.2x",
kind);
@ -1114,11 +1201,14 @@ GOACC_enter_exit_data (int flags_m, size_t mapnum, void **hostaddrs,
{
unsigned char kind = kinds[i] & 0xff;
if (kind == GOMP_MAP_POINTER || kind == GOMP_MAP_TO_PSET)
if (kind == GOMP_MAP_POINTER
|| kind == GOMP_MAP_TO_PSET
|| kind == GOMP_MAP_STRUCT)
continue;
if (kind == GOMP_MAP_FORCE_ALLOC
|| kind == GOMP_MAP_FORCE_PRESENT
|| kind == GOMP_MAP_ATTACH
|| kind == GOMP_MAP_FORCE_TO
|| kind == GOMP_MAP_TO
|| kind == GOMP_MAP_ALLOC)
@ -1129,6 +1219,8 @@ GOACC_enter_exit_data (int flags_m, size_t mapnum, void **hostaddrs,
if (kind == GOMP_MAP_RELEASE
|| kind == GOMP_MAP_DELETE
|| kind == GOMP_MAP_DETACH
|| kind == GOMP_MAP_FORCE_DETACH
|| kind == GOMP_MAP_FROM
|| kind == GOMP_MAP_FORCE_FROM)
break;

51
libgomp/target.c
View File

@ -360,6 +360,7 @@ gomp_map_vars_existing (struct gomp_device_descr *devicep,
tgt_var->key = oldn;
tgt_var->copy_from = GOMP_MAP_COPY_FROM_P (kind);
tgt_var->always_copy_from = GOMP_MAP_ALWAYS_FROM_P (kind);
tgt_var->do_detach = kind == GOMP_MAP_ATTACH;
tgt_var->offset = newn->host_start - oldn->host_start;
tgt_var->length = newn->host_end - newn->host_start;
@ -798,8 +799,15 @@ gomp_map_vars_internal (struct gomp_device_descr *devicep,
has_firstprivate = true;
continue;
}
else if ((kind & typemask) == GOMP_MAP_ATTACH)
{
tgt->list[i].key = NULL;
has_firstprivate = true;
continue;
}
cur_node.host_start = (uintptr_t) hostaddrs[i];
if (!GOMP_MAP_POINTER_P (kind & typemask))
if (!GOMP_MAP_POINTER_P (kind & typemask)
&& (kind & typemask) != GOMP_MAP_ATTACH)
cur_node.host_end = cur_node.host_start + sizes[i];
else
cur_node.host_end = cur_node.host_start + sizeof (void *);
@ -1046,6 +1054,32 @@ gomp_map_vars_internal (struct gomp_device_descr *devicep,
== GOMP_MAP_POINTER))
++i;
continue;
case GOMP_MAP_ATTACH:
{
cur_node.host_start = (uintptr_t) hostaddrs[i];
cur_node.host_end = cur_node.host_start + sizeof (void *);
splay_tree_key n = splay_tree_lookup (mem_map, &cur_node);
if (n != NULL)
{
tgt->list[i].key = n;
tgt->list[i].offset = cur_node.host_start - n->host_start;
tgt->list[i].length = n->host_end - n->host_start;
tgt->list[i].copy_from = false;
tgt->list[i].always_copy_from = false;
tgt->list[i].do_detach
= (pragma_kind != GOMP_MAP_VARS_OPENACC_ENTER_DATA);
n->refcount++;
}
else
{
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("outer struct not mapped for attach");
}
gomp_attach_pointer (devicep, aq, mem_map, n,
(uintptr_t) hostaddrs[i], sizes[i],
cbufp);
continue;
}
default:
break;
}
@ -1090,10 +1124,12 @@ gomp_map_vars_internal (struct gomp_device_descr *devicep,
tgt->list[i].copy_from = GOMP_MAP_COPY_FROM_P (kind & typemask);
tgt->list[i].always_copy_from
= GOMP_MAP_ALWAYS_FROM_P (kind & typemask);
tgt->list[i].do_detach = false;
tgt->list[i].offset = 0;
tgt->list[i].length = k->host_end - k->host_start;
k->refcount = 1;
k->virtual_refcount = 0;
k->aux = NULL;
tgt->refcount++;
array->left = NULL;
array->right = NULL;
@ -1144,6 +1180,7 @@ gomp_map_vars_internal (struct gomp_device_descr *devicep,
tgt->list[j].key = k;
tgt->list[j].copy_from = false;
tgt->list[j].always_copy_from = false;
tgt->list[j].do_detach = false;
if (k->refcount != REFCOUNT_INFINITY)
k->refcount++;
gomp_map_pointer (tgt, aq,
@ -1377,6 +1414,18 @@ gomp_unmap_vars_internal (struct target_mem_desc *tgt, bool do_copyfrom,
}
size_t i;
/* We must perform detachments before any copies back to the host. */
for (i = 0; i < tgt->list_count; i++)
{
splay_tree_key k = tgt->list[i].key;
if (k != NULL && tgt->list[i].do_detach)
gomp_detach_pointer (devicep, aq, k, tgt->list[i].key->host_start
+ tgt->list[i].offset,
k->refcount == 1, NULL);
}
for (i = 0; i < tgt->list_count; i++)
{
splay_tree_key k = tgt->list[i].key;