What happens when DRAM has more bandwidth than Layer 3 cache?

By: Etienne (etienne_lorrain.delete@this.yahoo.fr), December 14, 2022 4:20 am
Room: Moderated Discussions
Andrey (andrey.semashev.delete@this.gmail.com) on December 8, 2022 3:10 pm wrote:
> Maybe updated AGESA will improve things in the future.

FYI the last BIOS from Dec 12th with comment:
- AGESA ComboPI 1.0.0.4 update.

Did improve things significantly, I can now rebuild from scratch Android without error, sticking the 32 CPU at 100% for 47 minutes. Needs 10 GBytes swap if only 32 GB physical DRAM.

If someone would like to reproduce:
sudo apt-get install git-core gnupg flex bison build-essential zip curl zlib1g-dev gcc-multilib g++-multilib libc6-dev-i386 libncurses5 lib32ncurses5-dev x11proto-core-dev libx11-dev lib32z1-dev libgl1-mesa-dev libxml2-utils xsltproc unzip fontconfig repo
mkdir -p android/android-12.0.0_r2
cd android/android-12.0.0_r2
git config --global user.name your-name
git config --global user.email your-email
repo init -u https://android.googlesource.com/platform/manifest -b android-12.0.0_r2
repo sync # takes some time...
cd ~/android/android-12.0.0_r2
. build/envsetup.sh
lunch aosp_cf_x86_64_phone-eng
make clean
make # or make -j 32

And the last command needs to finish with "#### build completed successfully () ####" for success.
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TopicPosted ByDate
What happens when DRAM has more bandwidth than Layer 3 cache?Etienne2022/12/08 07:20 AM
  What happens when DRAM has more bandwidth than Layer 3 cache?Simon Farnsworth2022/12/08 08:22 AM
    bandwidth*delay productMichael S2022/12/08 09:06 AM
    What happens when DRAM has more bandwidth than Layer 3 cache?---2022/12/08 11:44 AM
      What happens when DRAM has more bandwidth than Layer 3 cache?blaine2022/12/08 06:07 PM
  What happens when DRAM has more bandwidth than Layer 3 cache?Michael S2022/12/08 08:32 AM
    What happens when DRAM has more bandwidth than Layer 3 cache?Etienne2022/12/08 09:05 AM
      What happens when DRAM has more bandwidth than Layer 3 cache?Michael S2022/12/08 09:13 AM
        What happens when DRAM has more bandwidth than Layer 3 cache?Etienne2022/12/08 02:56 PM
  What happens when DRAM has more bandwidth than Layer 3 cache?Peter E. fry2022/12/08 09:20 AM
  Programs do not see bandwidth. Programs only see latency. Heikki Kultala2022/12/08 09:26 AM
    Programs do not see bandwidth. Programs only see latency. Chester2022/12/08 12:07 PM
  What happens when DRAM has more bandwidth than Layer 3 cache?Doug S2022/12/08 10:31 AM
  What happens when DRAM has more bandwidth than Layer 3 cache?---2022/12/08 11:32 AM
    What happens when DRAM has more bandwidth than Layer 3 cache?Michael S2022/12/08 03:42 PM
      What happens when DRAM has more bandwidth than Layer 3 cache?---2022/12/08 04:54 PM
        What happens when DRAM has more bandwidth than Layer 3 cache?Anon2022/12/20 07:46 AM
  What happens when DRAM has more bandwidth than Layer 3 cache?Andrey2022/12/08 04:10 PM
    What happens when DRAM has more bandwidth than Layer 3 cache?Etienne2022/12/14 04:20 AM
  What happens when DRAM has more bandwidth than Layer 3 cache?Gionatan Danti2022/12/09 01:31 AM
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