Bruce Dubbs wrote:
Matthew Burgess wrote:
Randy McMurchy wrote:
I don't think the last two binutils
commands belong in the timing of the SBU, as these two commands
aren't involved in the build process of the *binutils* pass1
chapter 5 package. These two commands are used as part of the
setup for binutils in pass2. To me I see this different than
you.
Well, I'm in violent agreement with you here, Randy. Like you though,
I'm not sure it much matters whether the two extra instructions are
included or not. I'd prefer they are left out, but I'll defer to
whatever the lists' consensus is on this one.
Just for reference, this is the script I use for my timing build of
binutils.
Doing some checking, the timing of:
make -C ld clean
make -C ld LIB_PATH=/tools/lib
takes 5.1% of the total build time. Changing the process to not include
this 5% will increase all the others by this amount. The largest value,
glibc in Chapter 6, will increase from 12.3 SBU to 12.9 SBU.
The way it is measured will, of course, affect BLFS, but since we have
to rebuild everything and remeasure everything for a released based on a
new LFS anyway, it wouldn't make any difference.
My only concern is telling users how to measure. I have always thought
of the SBU measurements as the time it takes to accomplish the
procedures in a section of the book, not necessarily the time to build
the 'package'. If you are not going to measure all the instructions in
Chapter 5's binutils, then this needs to be made very clear in the book.
Well, personally I measure them using the following simple rule:
1. Start timing immediately after the tarball has been unpacked.
2. Don't time the running of any testsuite commands.
3. Stop timing immediately after 'make install' has completed.
This applies for all packages, including pass 1 of binutils in chapter
5. Configuration time is usually negligible, and isn't overly common in
LFS, I believe. So, in the interests of treating all packages the same,
I think the above is the fairest method of measurement.
If everyone agrees, then minor edits to chapter04/aboutsbus.xml should
help clarify this.
Cheers,
Matt.
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