On 2019-12-15日的 23:54 -0600，Bruce Dubbs via lfs-dev wrote: > On 12/15/19 7:06 PM, Ken Moffat via lfs-dev wrote: > > On Sun, Dec 15, 2019 at 12:30:52PM -0600, Bruce Dubbs via lfs-dev > > wrote: > > > https://www.phoronix.com/scan.php?page=article&item=10980xe-intel-linux > > > > > > I find the benchmarks interesting. On page 5 is the time for > > > kernel > > > comparison. On my Haswell I get for linux-5.4.2: > > > > > > $ time make defconfig > > > real 0m2.883s > > > > > > $ time make > > > real 15m28.691s > > > > > > And after 'make mrproper; make defconfig' > > > > > > $ time make -j12 > > > real 2m24.326s > > > > > > Clearly it's time for me to consider upgrading my development > > > system, but > > > I'm waiting to see what Intel's 10nm processors can do and what > > > they will > > > cost. My current SBU time is 101s and some of the larger > > > packages like > > > libreoffice, thunderbird, qt, qtwebengine. etc are a bit tedious. > > > > > > > I don't ever make defconfig (apart from my laptop, my configs are > > adequately smaller although some unwanted things invariably get > > pulled in). But I see that on my i7 haswell (DDR3 1600!) the SBU > > is > > around 101s - latest binutils adds a second or two - and on my > > Picasso (DDR4 3000 but with binutils-2.32) the latest build was > > also > > 101s. > > > > For kernel compiles, make -j{N+1} is the old recommendation, or > > from > > people like Greg K-H make -j{Nx2}. Unlike C++ and rust the kernel > > doesn't use a lot of RAM when compiling. > > > > But I don't see that I'll buy intel again in the foreseeable > > future. > > > > > On the other hand on page 6, Systemd Total Boot Time > > > > > > The best time was about 25 seconds. On my Haswell, my LFS System > > > V boot > > > time is 8 seconds. > > > > > > -- Bruce > > > > My haswell often spends several seconds in boot with things like > > unbound (for me, that is used on all systems, not as a server > > package). But I haven't timed a boot recently. For systemd > > desktops, the time will include both X (or Wayland) and the > > display manager. > > For SysV the boot times are in /var/log/boot.log. > > -- Bruce
Considering SBU value, should we add --enable-checking=release into GCC configure command? Most distributions are using it and I think it's safe with GCC release tarballs (instead of svn checkout). -- Xi Ruoyao <xry...@mengyan1223.wang> School of Aerospace Science and Technology, Xidian University -- http://lists.linuxfromscratch.org/listinfo/lfs-dev FAQ: http://www.linuxfromscratch.org/faq/ Unsubscribe: See the above information page
