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[svn-r2736] Purpose:

Browse Source 
Code optimization
Description:
    Minor tweaks throughout the optimized regular hyperslab code to increase
    speed.  This set of improvements increase the benchmark time from taking
    ~5.46 seconds to ~4.50 seconds, or around a 20% further speedup.
Platforms tested:
    Solaris 2.6 (baldric)
This commit is contained in:
Quincey Koziol
2000-10-25 13:54:24 -05:00
parent a224c0b56d
commit 057cbbf96c
6 changed files with 352 additions and 268 deletions
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16
src/H5Fseq.c
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@@ -42,7 +42,7 @@ static intn interface_initialize_g = 0;
* in memory. The data is read from file F and the array's size and
* storage information is in LAYOUT. External files are described
* according to the external file list, EFL. The sequence offset is
* FILE_OFFSET in the file and MEM_OFFSET in memory (offsets are
* FILE_OFFSET in the file (offsets are
* in terms of bytes) and the size of the hyperslab is SEQ_LEN. The
* total size of the file array is implied in the LAYOUT argument.
*
@@ -59,8 +59,7 @@ herr_t
H5F_seq_read(H5F_t *f, hid_t dxpl_id, const struct H5O_layout_t *layout,
const struct H5O_pline_t *pline, const H5O_fill_t *fill,
const struct H5O_efl_t *efl, const H5S_t *file_space, size_t elmt_size,
hsize_t seq_len, hssize_t mem_offset, hssize_t file_offset,
void *_buf/*out*/)
hsize_t seq_len, hssize_t file_offset, void *_buf/*out*/)
{
uint8_t *buf = (uint8_t*)_buf; /*cast for arithmetic */
hsize_t dset_dims[H5O_LAYOUT_NDIMS]; /* dataspace dimensions */
@@ -120,7 +119,6 @@ H5F_seq_read(H5F_t *f, hid_t dxpl_id, const struct H5O_layout_t *layout,
addr = layout->addr;
}
addr += file_offset;
buf += mem_offset;
/*
* Now begin to walk through the array, copying data from disk to
@@ -194,7 +192,7 @@ H5F_seq_read(H5F_t *f, hid_t dxpl_id, const struct H5O_layout_t *layout,
if(count<10) {
printf("%s: elmt_size=%d, addr=%d, seq_len=%d\n",FUNC,(int)elmt_size,(int)addr,(int)seq_len);
printf("%s: file_offset=%d, mem_offset=%d\n",FUNC,(int)file_offset,(int)mem_offset);
printf("%s: file_offset=%d\n",FUNC,(int)file_offset);
count++;
}
}
@@ -271,7 +269,7 @@ H5F_seq_read(H5F_t *f, hid_t dxpl_id, const struct H5O_layout_t *layout,
* in memory. The data is written to file F and the array's size and
* storage information is in LAYOUT. External files are described
* according to the external file list, EFL. The sequence offset is
* FILE_OFFSET in the file and MEM_OFFSET in memory (offsets are
* FILE_OFFSET in the file (offsets are
* in terms of bytes) and the size of the hyperslab is SEQ_LEN. The
* total size of the file array is implied in the LAYOUT argument.
*
@@ -288,8 +286,7 @@ herr_t
H5F_seq_write(H5F_t *f, hid_t dxpl_id, const struct H5O_layout_t *layout,
const struct H5O_pline_t *pline, const H5O_fill_t *fill,
const struct H5O_efl_t *efl, const H5S_t *file_space, size_t elmt_size,
hsize_t seq_len, hssize_t mem_offset, hssize_t file_offset,
const void *_buf)
hsize_t seq_len, hssize_t file_offset, const void *_buf)
{
const uint8_t *buf = (const uint8_t*)_buf; /*cast for arithmetic */
hsize_t dset_dims[H5O_LAYOUT_NDIMS]; /* dataspace dimensions */
@@ -349,7 +346,6 @@ H5F_seq_write(H5F_t *f, hid_t dxpl_id, const struct H5O_layout_t *layout,
addr = layout->addr;
}
addr += file_offset;
buf += mem_offset;
/*
* Now begin to walk through the array, copying data from disk to
@@ -417,7 +413,7 @@ H5F_seq_write(H5F_t *f, hid_t dxpl_id, const struct H5O_layout_t *layout,
if(count<10) {
printf("%s: elmt_size=%d, addr=%d, seq_len=%lu\n",FUNC,(int)elmt_size,(int)addr,(unsigned long)seq_len);
printf("%s: file_offset=%d, mem_offset=%d\n",FUNC,(int)file_offset,(int)mem_offset);
printf("%s: file_offset=%d\n",FUNC,(int)file_offset);
count++;
}
}