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target: increase chunk size in dump_image 

Replace the big stack-allocated buffer with a much bigger heap-allocated.
There was no explanation for the apparently arbitrary chunk size, and
performance was improved by increasing it, leveling out at about 4k.

Change-Id: I3b06d4469092ec8d89d0ce05bff0b7cf213c5062
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/404
Tested-by: jenkins
Reviewed-by: Marti Bolivar <mbolivar@leaflabs.com>
Reviewed-by: Øyvind Harboe <oyvindharboe@gmail.com>
This commit is contained in:
Andreas Fritiofson 2012-01-28 02:35:57 +01:00 committed by Øyvind Harboe
parent fce4ac5714
commit 61f3d4b7e4
1 changed files with 12 additions and 4 deletions
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16
src/target/target.c
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@ -2797,7 +2797,7 @@ COMMAND_HANDLER(handle_load_image_command)
COMMAND_HANDLER(handle_dump_image_command)
{
struct fileio fileio;
uint8_t buffer[560];
uint8_t *buffer;
int retval, retvaltemp;
uint32_t address, size;
struct duration bench;
@ -2809,17 +2809,23 @@ COMMAND_HANDLER(handle_dump_image_command)
COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], address);
COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], size);
uint32_t buf_size = (size > 4096) ? 4096 : size;
buffer = malloc(buf_size);
if (!buffer)
return ERROR_FAIL;
retval = fileio_open(&fileio, CMD_ARGV[0], FILEIO_WRITE, FILEIO_BINARY);
if (retval != ERROR_OK)
if (retval != ERROR_OK) {
free(buffer);
return retval;
}
duration_start(&bench);
retval = ERROR_OK;
while (size > 0)
{
size_t size_written;
uint32_t this_run_size = (size > 560) ? 560 : size;
uint32_t this_run_size = (size > buf_size) ? buf_size : size;
retval = target_read_buffer(target, address, this_run_size, buffer);
if (retval != ERROR_OK)
{
@ -2836,6 +2842,8 @@ COMMAND_HANDLER(handle_dump_image_command)
address += this_run_size;
}
free(buffer);
if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
{
int filesize;