Just some numbers that I got with a small testsuite. This
is the setiathome client running on an AMD Athlon-500 (K7),
FreeBSD 4.0-current (as of 1999-09-18). Of course, I've
used the same work unit for all tests. I also changed the
code to stop after a certain amount of data has processed,
Oliver Fromme [EMAIL PROTECTED] writes:
The gcc optimizer is traditionally buggy. I wouldn't trust a
system compiled with anything more than -O (especially on
production servers). The higher optimization levels don't
provide much of a speed improvement anyway, sometimes they make
the
On Fri, Sep 24, 1999 at 12:08:10PM +0900, Daniel C. Sobral wrote:
The point is that it _does_ hurt. Anything above -O3 is _likely_ to
have bugs.
I am forced to agree about the fact that optimisation is traditionally
buggy :)
I tried to optimize my system with -O3 and -pipe. So I build myself
a
"Zach N. Heilig" [EMAIL PROTECTED] wrote:
The application for the tests is mpg123.
test mp3 playing time: 373 seconds.
[ ... ]
1) No Optimization
225.08 real 224.30 user 0.23 sys
[ ... ]
2) -O3 -mcpu=i486 -march=i486 -fomit-frame-pointer -fschedule-insns
On Fri, 24 Sep 1999 12:08:10 +0900, "Daniel C. Sobral" [EMAIL PROTECTED] said:
The point is that it _does_ hurt. Anything above -O3 is _likely_ to
have bugs.
And more to the point: the FreeBSD Project will not support those who
compile their kernel or world with anything other than the
Darryl Okahata wrote in list.freebsd-current:
"Zach N. Heilig" [EMAIL PROTECTED] wrote:
The application for the tests is mpg123.
test mp3 playing time: 373 seconds.
[ ... ]
1) No Optimization
225.08 real 224.30 user 0.23 sys
[ ... ]
2) -O3
On Thu, 23 Sep 1999 08:00:50 -0300, The Hermit Hacker wrote:
just curious, but what is the max setting that can be used to compile the
kernel?
-O
Ciao,
Sheldon.
To Unsubscribe: send mail to [EMAIL PROTECTED]
with "unsubscribe freebsd-current" in the body of the message
On Thu, 23 Sep 1999, Sheldon Hearn wrote:
On Thu, 23 Sep 1999 08:00:50 -0300, The Hermit Hacker wrote:
just curious, but what is the max setting that can be used to compile the
kernel?
-O
well, I just did -O3 -mpentium, and it both compiled cleanly, and appears
to be running okay,
On Thu, 23 Sep 1999 08:23:09 -0300, The Hermit Hacker wrote:
well, I just did -O3 -mpentium, and it both compiled cleanly, and appears
to be running okay, so is -O the max that makes a difference, or...?
Or...
Try build world with that kernel running. :-)
Ciao,
Sheldon.
To Unsubscribe:
On Thu, 23 Sep 1999, The Hermit Hacker wrote:
just curious, but what is the max setting that can be used to compile the
kernel?
Works rather nicely here with
-O6 -mpentiumpro -march=pentiumpro -pipe -s -fexpensive-optimizations
-ffast-math
LLaP
bero
To Unsubscribe: send mail to [EMAIL
On 23 Sep, Sheldon Hearn wrote:
well, I just did -O3 -mpentium, and it both compiled cleanly, and appears
to be running okay, so is -O the max that makes a difference, or...?
Or...
Try build world with that kernel running. :-)
Just to let you know: -Os works for me (since egcs hit the
On Thu, 23 Sep 1999, Sheldon Hearn wrote:
On Thu, 23 Sep 1999 08:23:09 -0300, The Hermit Hacker wrote:
well, I just did -O3 -mpentium, and it both compiled cleanly, and appears
to be running okay, so is -O the max that makes a difference, or...?
Or...
Try build world with that
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
well, I just did -O3 -mpentium, and it both compiled cleanly, and
appears
Try build world with that kernel running. :-)
I should have mentioned that I'm speaking from fairly stale experience.
I got bitten by this last year and haven't
In the last episode (Sep 23), [EMAIL PROTECTED] said:
On Thu, 23 Sep 1999, The Hermit Hacker wrote:
just curious, but what is the max setting that can be used to
compile the kernel?
Works rather nicely here with
-O6 -mpentiumpro -march=pentiumpro -pipe -s -fexpensive-optimizations
On Thu, 23 Sep 1999, Dan Nelson wrote:
Works rather nicely here with
-O6 -mpentiumpro -march=pentiumpro -pipe -s -fexpensive-optimizations
-ffast-math
-O6 is too much; -O3 is the highest level tested for by egcs.
But specifying something too high (-O99) doesn't hurt - I'm using -O6
On Thu, 23 Sep 1999, Sheldon Hearn wrote:
On Thu, 23 Sep 1999 08:23:09 -0300, The Hermit Hacker wrote:
well, I just did -O3 -mpentium, and it both compiled cleanly, and appears
to be running okay, so is -O the max that makes a difference, or...?
Or...
Try build world with that
On Thu, 23 Sep 1999, Matthew Dillon wrote:
I tend not to like the higher optimization levels because they cause
the compiler to attempt to turn static functions into inlines and,
in my opinion, it doesn't do a very good job of selecting which functions
to convert. The result is
[EMAIL PROTECTED] wrote in list.freebsd-current:
On Thu, 23 Sep 1999, The Hermit Hacker wrote:
just curious, but what is the max setting that can be used to compile the
kernel?
Works rather nicely here with
-O6 -mpentiumpro -march=pentiumpro -pipe -s -fexpensive-optimizations
18 matches
Mail list logo
