disable _all_ mitigations

  • become root
  • edit /etc/default/grub
  • add the options to GRUB_CMDLINE_LINUX_DEFAULT
  • run update-grub

pti=off spectre_v2=off l1tf=off nospec_store_bypass_disable no_stf_barrier

On Linux distributions like Ubuntu 18.10 and Clear Linux the mitigation costs were about ~18% while both RHEL 8 Beta and openSUSE 15.0 had a nearly 40% hit.

Tested with Skylake-X. Older architectures like Nehalem, Sandy Bridge, Ivy Bridge, Haswell and Broadwell could be impacted much more.
https://www.phoronix.com/scan.php?page=article&item=spec-melt-8way&num=1

multiroom audio cheap open source solution

1) Server: Logitech Media Server
source: https://github.com/Logitech/slimserver
binaries: http://downloads.slimdevices.com/
2) Client: SqueezePlay / squeezelite
source: http://svn.slimdevices.com/repos/jive/
binaries: http://wiki.slimdevices.com/index.php/SqueezePlay_binaries
squeezelite instructions one post below
3) Remote: Squeezer
source: https://nikclayton.github.io/android-squeezer/
binaries: aptoide / playstore?

mx5 nb 150whp recipe


From filter to silencer


1) Big cone filter, 53 – 58,5cm length intake tube (measure from TP to filter), 63,5mm diameter. Remove MAF, put IAT sensor in air stream.
2) Flattop / Squaretop intake manifold
3) Polish head, valve bowls
4) Racing beat 4-2-1 exhaust manifold
5) 200/100 cpsi catalytic converter
6) 2,5″ (63,5mm) Exhaust

for safety:

1) Aftermarket 64mm TB, loctite TP screws

management:


1) ECU (MS3X, ME221, Speeduino, ...)
2) WBO2 (14point7, AEM, ...)

mining memory timings for polaris gpu

MT51J256M3, MICRON:
777000000000000022AA1C0073626C41B0551016BA0D260B006AE60004061420EA8940AA030000001914292EB22E3B16
EDW4032BAB, ELPIDA:
777000000000000022AA1C00315A5B36A0550F15B68C1506004082007C041420CA8980A9020004C01712262B612B3715
H5GC4H24AJ, HYNIX_1:
999000000000000022559D0010DE5B4480551312B74C450A00400600750414206A8900A00200312010112D34A42A3816
H5GQ8H24MJ, HYNIX_2;
H5GC8H24MJ, HYNIX_2:
777000000000000022AA1C00B56A6D46C0551017BE8E060C006AE6000C081420EA8900AB030000001B162C31C0313F17
K4G80325FB, SAMSUNG;
K4G41325FE, SAMSUNG;
K4G41325FC, SAMSUNG;
K4G41325FS, SAMSUNG:
777000000000000022CC1C00AD615C41C0590E152ECC8608006007000B031420FA8900A00300000010122F3FBA354019

cuda 10 ubuntu 18.10


sudo add-apt-repository ppa:graphics-drivers/ppa
sudo apt-get update
sudo apt-get dist-upgrade
# https://developer.nvidia.com/cuda-downloads?target_os=Linux&target_arch=x86_64&target_distro=Ubuntu&target_version=1804&target_type=deblocal
sudo dpkg -i cuda-repo-ubuntu1804-10-0-local-10.0.130-410.48_1.0-1_amd64.deb
sudo apt-key add /var/cuda-repo-10-0-local-10.0.130-410.48/7fa2af80.pub
sudo apt-get update
sudo apt-get install cuda
# reboot
sudo apt-get install gcc-7 g++-7 gcc-7-multilib g++-7-multilib
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-7 10
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 20
sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-7 10
sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-8 20
sudo update-alternatives --config gcc; # select gcc-7
sudo update-alternatives --config g++; # select g++-7
cd /usr/local/cuda/samples/5_Simulations/nbody
sudo make