On 26/11/2020 09:56, Mark Geisert wrote:
Cut mkimport elapsed time in half by forking each iteration of the two
time-consuming loops within. Only do this if more than one CPU is
present. In the second loop, combine the two 'objdump' calls into one
system() invocation to avoid a system()
Achim Gratz writes:
> That actually works, but the speedup is quite modest on my system
> (4C/8T) even though I've allowed it to use unlimited resources. So it
> basically forks slower than the runtime for each of the invocations is.
> Some more speedup can be had if the assembler is run on
Achim Gratz writes:
> b) Open up two pipes to an "xargs -P $ncpu/2 L 1 …" and feed in the file
> names.
That actually works, but the speedup is quite modest on my system
(4C/8T) even though I've allowed it to use unlimited resources. So it
basically forks slower than the runtime for each of the
On 2020-11-27 11:37, Achim Gratz wrote:
Mark Geisert writes:
Still faster than two system commands :-). But thanks for the
comment;
It still seems you are barking up the wrong tree.
I thought I was merely grouping args, to get around Perl's
greedy arg list building for the system command.
Mark Geisert writes:
> Still faster than two system commands :-). But thanks for the
> comment;
It still seems you are barking up the wrong tree.
> I thought I was merely grouping args, to get around Perl's
> greedy arg list building for the system command.
Wot? It just takes a list which you
Jon Turney wrote:
On 26/11/2020 09:56, Mark Geisert wrote:
@@ -86,8 +94,18 @@ for my $f (keys %text) {
if (!$text{$f}) {
unlink $f;
} else {
- system $objcopy, '-R', '.text', $f and exit 1;
- system $objcopy, '-R', '.bss', '-R', '.data', "t-$f" and exit 1;
+ if
Achim Gratz wrote:
Mark Geisert writes:
+ # Do two objcopy calls at once to avoid one system() call overhead
+ system '(', $objcopy, '-R', '.text', $f, ')', '||',
+ $objcopy, '-R', '.bss', '-R', '.data', "t-$f" and exit 1;
That doesn't do what you think it
Mark Geisert writes:
> + # Do two objcopy calls at once to avoid one system() call overhead
> + system '(', $objcopy, '-R', '.text', $f, ')', '||',
> + $objcopy, '-R', '.bss', '-R', '.data', "t-$f" and exit 1;
That doesn't do what you think it does. It in fact
Previously, Mark Geisert wrote:
Cut mkimport elapsed time in half by forking each iteration of the two
time-consuming loops within. Only do this if more than one CPU is
present. In the second loop, combine the two 'objdump' calls into one
