| #include <iostream> | |
| #include <memory> | |
| #include <regex> | |
| #include <cassert> | |
| #include <experimental/filesystem> | |
| #include <fcntl.h> | |
| #include <sys/mman.h> | |
| #include <sys/stat.h> | |
| #include <sys/types.h> |
| @startuml | |
| start | |
| :Request created; | |
| while (Review request) is (accepted) | |
| :Jira ticket is created; | |
| :Assign Cloud Performance Engineer (PE) to Jira ticket; | |
| :CPE designs test plan; | |
| :CPE calculate CSP cost; |
Boot a specific installed Ubuntu kernel using grub-reboot and grub-set-default.
This allows you to pick what kernel you want to boot on next reboot, or set the default, without having to know much about how grub works or editing config files.
Usage: boot-kernel [options] [kernel]
call grub-reboot or grub-set-default to boot the provided kernel.
| From 6cf513dc8c5ab758072d894f10a58fbb4a146bd6 Mon Sep 17 00:00:00 2001 | |
| From: Jon Nettleton <jon@solid-run.com> | |
| Date: Wed, 6 Oct 2021 09:16:35 -0400 | |
| Subject: [PATCH] Aarch64: Make memcpy more compatible with device memory | |
| For normal non-cacheable memory ACE supports 4x128 bit r/w WRAP | |
| transfers or 1x128 bit r/w INCR transfers. By re-ordering the | |
| stp's in memcpy / memmove we can accomodate this better without | |
| impacting the existing code. |
| # Kernel sysctl configuration file for Linux | |
| # | |
| # Version 1.14 - 2019-04-05 | |
| # Michiel Klaver - IT Professional | |
| # http://klaver.it/linux/ for the latest version - http://klaver.it/bsd/ for a BSD variant | |
| # | |
| # This file should be saved as /etc/sysctl.conf and can be activated using the command: | |
| # sysctl -e -p /etc/sysctl.conf | |
| # | |
| # For binary values, 0 is disabled, 1 is enabled. See sysctl(8) and sysctl.conf(5) for more details. |
| SERVER=jaraberrocal.readmyblog.org | |
| PORT=2443 | |
| CERTIFICATE=/etc/gitlab-runner/certs/${SERVER}.crt | |
| # Create the certificates hierarchy expected by gitlab | |
| sudo mkdir -p $(dirname "$CERTIFICATE") | |
| # Get the certificate in PEM format and store it | |
| openssl s_client -connect ${SERVER}:${PORT} -showcerts </dev/null 2>/dev/null | sed -e '/-----BEGIN/,/-----END/!d' | sudo tee "$CERTIFICATE" >/dev/null |
This is a short post that explains how to write a high-performance matrix multiplication program on modern processors. In this tutorial I will use a single core of the Skylake-client CPU with AVX2, but the principles in this post also apply to other processors with different instruction sets (such as AVX512).
Matrix multiplication is a mathematical operation that defines the product of
| // concurrent-queue.h | |
| #ifndef CONCURRENT_QUEUE_H_ | |
| #define CONCURRENT_QUEUE_H_ | |
| #include <queue> | |
| #include <thread> | |
| #include <mutex> | |
| #include <condition_variable> | |
| template <typename T> |
| Go 1.10.3 vs 1.11beta3 | |
| Linux Firefly3399 4.4.138 #3 SMP Sat Jul 21 18:29:19 EST 2018 aarch64 GNU/Linux | |
| go test crypto/tls -bench BenchmarkThroughput | |
| benchmark old ns/op new ns/op delta | |
| BenchmarkThroughput/MaxPacket/1MB-6 215113025 30982856 -85.60% | |
| BenchmarkThroughput/MaxPacket/2MB-6 373540806 47685945 -87.23% | |
| BenchmarkThroughput/MaxPacket/4MB-6 662471229 64692820 -90.23% | |
| BenchmarkThroughput/MaxPacket/8MB-6 1297366168 121892691 -90.60% |
| # set the arch [IM] | |
| sudo dpkg --add-architecture i386 | |
| # add the repos [IM] | |
| sudo add-apt-repository -y ppa:wine/wine-builds | |
| sudo add-apt-repository -y ppa:ethanak/milena | |
| # update the deps [IM] | |
| sudo apt-get update | |
| sudo apt-get -y upgrade |