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* src/buffer.c (record_buffer_aligned): New var.

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(init_buffer): Use it to ensure that the buffer is aligned.
This doesn't result in any measurable performance improvement
on my host (Debian GNU/Linux 3.1 stable, with default block size),
but I assume it does help on some hosts.
This commit is contained in:
Paul Eggert
2006-03-08 00:55:56 +00:00
parent 6c1020d386
commit 18486cf8d7
2 changed files with 11 additions and 3 deletions
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6
ChangeLog
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@@ -1,5 +1,11 @@
2006-03-07 Paul Eggert <eggert@cs.ucla.edu>
* src/buffer.c (record_buffer_aligned): New var.
(init_buffer): Use it to ensure that the buffer is aligned.
This doesn't result in any measurable performance improvement
on my host (Debian GNU/Linux 3.1 stable, with default block size),
but I assume it does help on some hosts.
* lib/.cvsignore: Add unistd_.h. Sort.
2006-03-04 Sergey Poznyakoff <gray@gnu.org.ua>

8
src/buffer.c
View File

@@ -44,6 +44,7 @@
static tarlong prev_written; /* bytes written on previous volumes */
static tarlong bytes_written; /* bytes written on this volume */
static void *record_buffer[2]; /* allocated memory */
union block *record_buffer_aligned[2];
static int record_index;
/* FIXME: The following variables should ideally be static to this
@@ -369,10 +370,11 @@ xclose (int fd)
static void
init_buffer ()
{
if (!record_buffer[record_index])
page_aligned_alloc (&record_buffer[record_index], record_size);
if (! record_buffer_aligned[record_index])
record_buffer_aligned[record_index] =
page_aligned_alloc (&record_buffer[record_index], record_size);
record_start = record_buffer[record_index];
record_start = record_buffer_aligned[record_index];
current_block = record_start;
record_end = record_start + blocking_factor;
}