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Speeding up procedure for getting start of a heap block's data space for one-chunked blocks, removing general blocks support from the procedure.

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- heap area is aligned on heap chunk size;
 - mem_heap_get_block_start is renamed to mem_heap_get_chunked_block_start,
   now this interface is applicable only to one-chunked blocks,
   and is significantly faster - instead of iterating list of heap blocks
   to find block header, it just aligns value of pointer to heap chunk size.

JerryScript-DCO-1.0-Signed-off-by: Ruben Ayrapetyan r.ayrapetyan@samsung.com
This commit is contained in:
Ruben Ayrapetyan
2015-05-14 22:15:45 +03:00
parent 253e172127
commit 82f9afcde9
4 changed files with 77 additions and 39 deletions
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tests/unit/test_heap.cpp
+31 -12
View File
@@ -39,6 +39,7 @@ extern "C"
uint8_t *ptrs[test_sub_iters];
size_t sizes[test_sub_iters];
bool is_one_chunked[test_sub_iters];
static void
test_heap_give_some_memory_back (mem_try_give_memory_back_severity_t severity)
@@ -82,12 +83,13 @@ test_heap_give_some_memory_back (mem_try_give_memory_back_severity_t severity)
}
} /* test_heap_give_some_memory_back */
uint8_t test_native_heap[test_heap_size] __attribute__ ((aligned (JERRY_MAX (MEM_ALIGNMENT,
MEM_HEAP_CHUNK_SIZE))));
int
main (int __attr_unused___ argc,
char __attr_unused___ **argv)
{
uint8_t test_native_heap[test_heap_size];
mem_heap_init (test_native_heap, sizeof (test_native_heap));
srand ((unsigned int) time (NULL));
@@ -103,17 +105,31 @@ main (int __attr_unused___ argc,
{
for (uint32_t j = 0; j < test_sub_iters; j++)
{
size_t size = (size_t) rand () % test_threshold_block_size;
ptrs[j] = (uint8_t*) mem_heap_alloc_block (size,
(rand () % 2) ?
MEM_HEAP_ALLOC_LONG_TERM : MEM_HEAP_ALLOC_SHORT_TERM);
sizes[j] = size;
if (rand () % 2)
{
size_t size = (size_t) rand () % test_threshold_block_size;
ptrs[j] = (uint8_t*) mem_heap_alloc_block (size,
(rand () % 2) ?
MEM_HEAP_ALLOC_LONG_TERM : MEM_HEAP_ALLOC_SHORT_TERM);
sizes[j] = size;
is_one_chunked[j] = false;
}
else
{
ptrs[j] = (uint8_t*) mem_heap_alloc_chunked_block ((rand () % 2) ?
MEM_HEAP_ALLOC_LONG_TERM : MEM_HEAP_ALLOC_SHORT_TERM);
sizes[j] = mem_heap_get_chunked_block_data_size ();
is_one_chunked[j] = true;
}
JERRY_ASSERT (size == 0 || ptrs[j] != NULL);
JERRY_ASSERT (sizes[j] == 0 || ptrs[j] != NULL);
memset (ptrs[j], 0, sizes[j]);
JERRY_ASSERT (ptrs[j] == NULL
|| mem_heap_get_block_start (ptrs[j] + (size_t) rand () % sizes[j]) == ptrs[j]);
if (is_one_chunked[j])
{
JERRY_ASSERT (ptrs[j] != NULL
&& mem_heap_get_chunked_block_start (ptrs[j] + (size_t) rand () % sizes[j]) == ptrs[j]);
}
}
// mem_heap_print (true);
@@ -127,8 +143,11 @@ main (int __attr_unused___ argc,
JERRY_ASSERT (ptrs[j][k] == 0);
}
JERRY_ASSERT (sizes[j] == 0
|| mem_heap_get_block_start (ptrs[j] + (size_t) rand () % sizes[j]) == ptrs[j]);
if (is_one_chunked[j])
{
JERRY_ASSERT (sizes[j] == 0
|| mem_heap_get_chunked_block_start (ptrs[j] + (size_t) rand () % sizes[j]) == ptrs[j]);
}
mem_heap_free_block (ptrs[j]);