Re: LFS LiveCD x86_64-6.3-min-pre1 Available
On Friday 27 July 2007 10:33:53 am Jeremy Huntwork wrote: > On Fri, Jul 27, 2007 at 10:25:31AM -0400, kas wrote: > > that the book changed that much. 64 bit was run from the CD whereas the > > 32 bit build was run from the CD installed on a hard drive. > > This would kind of skew the accurateness of your test. Reads performed > on a CD filesystem are noticeably slower than those from a hard disk. As > you build /tools you are continuously reading and making use of items on > the host system, in other words, the LiveCD. Since your SBU is measured > by the first program you build, binutils, you would end up having a > higher SBU for a system built from the CD than one from an internal > disk. > > Of course, as the build progresses and you begin using more and more > items on the hard-disk only, (first in /tools and then in chroot), the > read time would increase. > > -- > JH Ok, so I didn't think that the CD was making much difference as the activity led was never on for more than a flash ... but I had to be sure so I ran from the r1952 LiveCD to do a 32 bit jhalfs-2.2 build on the same hardware (yes, I removed 2.1 and untarred 2.2 in its place). As before, I didn't build a kernel. So I was using a slightly different kernel but everything else was the same. The same swap partition was mounted in both cases. 32-bit build using the r1952 LiveCD --- Book version is:SVN-20070726 Using logs/028-binutils-pass1 to obtain the SBU unit value. The SBU unit value is equal to 151.428 seconds. Total time required to build the systen:76.144 SBU Total Installed files disk usage (including /tools but not /sources):538912 KB or 526.29 MB Build time comes out 192 minutes ... CD access time was lost in the noise as the run from the hard drive took 192 mins also ... the same as the 32-bit build from the LiveCD installed to a partition. It is what it is ... I had hoped and fully expected 64-bit building to be a little faster. 068-GCC took almost 9.5 minutes longer on the 64-bit build (54:37 vs 64:02 minutes) by itself. Riddle me that, Batman. Note that the disk space usage between this run and the 64-bit run are fairly close ... 64-bit using somewhat more ... but my earlier 32-bit run showed much greater usage ... seems like something is broken now or was before. For reference, here is the data from the 64-bit build. for 64 bit build excluding grub and no kernel build --- Book version is:SVN-x86_64-20070725 Using logs/028-binutils-pass1 to obtain the SBU unit value. The SBU unit value is equal to 169.741 seconds. Total time required to build the systen:73.876 SBU Total Installed files disk usage (including /tools but not /sources):610256 KB or 595.96 MB (209 minutes) Jeremy, I'm not trying to rain on your parade ... I want to figure out if I am doing something wrong or if we are building incorrectly ... or if gcc is (you fill in the blank). Bummer, K -- http://linuxfromscratch.org/mailman/listinfo/lfs-dev FAQ: http://www.linuxfromscratch.org/faq/ Unsubscribe: See the above information page
Re: LFS LiveCD x86_64-6.3-min-pre1 Available
On Wednesday 25 July 2007 11:27:39 pm Jeremy Huntwork wrote: > Hello, > > The LFS LiveCD team is pleased to announce a new 64bit-only CD. It is a > minimal CD, meaning that it contains no X Windows System and dependent > software nor any source packages. The LFS book that is included is based > on the current development x86_64 branch. Be advised that as of now that > book contains no instructions for building a boot loader, and some of > the textual information may need adjusting. However, it will produce a > working base system. > I kicked off a 64 bit jhalfs-2.2 build from LFS LiveCD x86_64-6.3-min-pre1 last night. The build ran to completion and resulted in a bootable system (using a kernel from another distro but that was just laziness ... I don't journal /boot so no Ext2 support meant no kernel 'til morning) ;) The dbus and ext2 problems noted elsewhere exist here also but don't affect things noticeably until system shutdown ... had to boot into that F-word distro to get into my boot partition as the LiveCD system won't mount Ext2 filesystems and a reset was required as shutdown hangs ... umount partitions you care about manually and let the rough side drag ... maybe mount the partition where $SRC_ARCHIVE is ro too. It is interesting to note how much slower the 64 bit build was. Even though the SBU count is down a little, the SBU time is much longer. I don't see that the book changed that much. 64 bit was run from the CD whereas the 32 bit build was run from the CD installed on a hard drive. Otherwise, everything was pretty much identical. I only noticed 1 or 2 things being dl'd so sources were pretty much identical between builds. Slowness seemed to be due to cache ejection ... the bigger the package, the longer the relative time to complete ... small packages often were a few seconds faster. This system is a Skt754 so no dual channel and main memory is a little slow so if it ain't in the cache, you wait. jhalfs-2.2 was used in both cases and the config setup the same. I don't understand the huge difference in disk storage use ... 64 bit ought to have been higher ... maybe more coffee is required for proper analysis and reportage ... Anyhow, here it is FWIW. for 64 bit build excluding grub and no kernel build --- Book version is:SVN-x86_64-20070725 Using logs/028-binutils-pass1 to obtain the SBU unit value. The SBU unit value is equal to 169.741 seconds. Total time required to build the systen:73.876 SBU Total Installed files disk usage (including /tools but not /sources):610256 KB or 595.96 MB (209 minutes) for 32 bit build including grub but no kernel build --- Book version is:SVN-20070718 Using logs/028-binutils-pass1 to obtain the SBU unit value. The SBU unit value is equal to 152.126 seconds. Total time required to build the systen:75.619 SBU Total Installed files disk usage (including /tools but not /sources):739944 KB or 722.60 MB Grub added .137 SBU and 1.09 MB (192 minutes) K -- http://linuxfromscratch.org/mailman/listinfo/lfs-dev FAQ: http://www.linuxfromscratch.org/faq/ Unsubscribe: See the above information page
Re: LiveCD Users
On Tuesday 17 July 2007 11:29:52 pm Jeremy Huntwork wrote:
> 1) What version of the CD do you use/have?
I'm using 6.3-r1952 although I have 6.2.5 also
> 2) What do you use the CD most for?
I'm exploring jhalfs ... basically just learning {,b,c}LFS ... but mostly I am
just futzing around learning by making mistakes
> 3) What are the most useful parts of the CD to you?
Being able to boot into a known good environment to build within.
I ike being able to run X ... in particular, I've found the I really like xfce
as a working environment. Having a browser open along with a xterm makes for
very convenient cut and paste.
I have the LiveCD installed on a partition of the 2 systems I'm using with
LFS currently.
> 4) What is the most annoying or useless bits of the CD?
I don't have any ... although there are certainly things I haven't gotten
around to using yet such as distcc ... I did read a warning about parallel
compiling but I am wondering how booting a couple machines off the same CD
would affect things ... but what I do best is procrastinate.
> 5) What would you change/add/improve?
Just a minor quibble ... jhalfs-2.2 is listed as latest stable yet 2.1 is on
the r1952 CD ... takes about 15 sec to fix but it prolly ought to be updated
for consistency ... but, boy howdy, I'm a happy camper. I haven't looked for
anything later although I know Jeremy has been working on the no-source CD.
I am quite interested in getting X86_64 running but I'm not up-to-speed on
CLFS yet ... I am looking forward to learning what I can as the project moves
forward in that direction.
K
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