patricksuo

using System;
using System.Threading;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class Program
    {
        static SemaphoreSlim mSema1 = new SemaphoreSlim(1);
        static SemaphoreSlim mSema2 = new SemaphoreSlim(0);

patricksuo

Latency Comparison Numbers
--------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

patricksuo

#!/usr/bin/env python
#
# USAGE:    dotnet-mapgen [-h] {generate,merge} PID
#
# In generate mode, this tool reads the /tmp/perfinfo-PID.map file generated
# by the CLR when running with COMPlus_PerfMapEnabled=1, and finds all load
# events for managed assemblies. For each managed assembly found in this way,
# the tool runs crossgen to generate a symbol mapping file (akin to debuginfo).
#
# In merge mode, this tool finds the load address of each managed assembly in

patricksuo

diff --git a/src/scripts/genXplatLttng.py b/src/scripts/genXplatLttng.py
index bacf034..3d40d77 100644
--- a/src/scripts/genXplatLttng.py
+++ b/src/scripts/genXplatLttng.py
@@ -407,8 +407,25 @@ def generateLttngTpProvider(providerName, eventNodes, allTemplates):
     for eventNode in eventNodes:
         eventName    = eventNode.getAttribute('symbol')
         templateName = eventNode.getAttribute('template')
+
+        template = allTemplates[templateName] if templateName else None

patricksuo

#!/usr/bin/env bash


# alias godev="source /usr/local/bin/godev"

EchoHelp() {
        echo "Hello"
}

NewGoProject() {

patricksuo

# https://blogs.technet.microsoft.com/heyscriptingguy/2012/05/21/understanding-the-six-powershell-profiles/

#Description
#Path
#Current User, Current Host - console
#$Home\[My ]Documents\WindowsPowerShell\Profile.ps1
#Current User, All Hosts   
#$Home\[My ]Documents\Profile.ps1
#All Users, Current Host - console   
#$PsHome\Microsoft.PowerShell_profile.ps1

patricksuo

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp2.0</TargetFramework>
    <DefineConstants  Condition="'$(OS)' == 'Windows_NT'">AAA;IS_WIN </DefineConstants>
  </PropertyGroup>
  <PropertyGroup Condition="'$(MSBuildRuntimeType)' == 'Core'">
	  <DefineConstants Condition="'$([System.Runtime.InteropServices.RuntimeInformation]::IsOSPlatform($([System.Runtime.InteropServices.OSPlatform]::OSX)))' == 'true'">AAA;IS_OSX</DefineConstants>
	  <DefineConstants Condition="'$([System.Runtime.InteropServices.RuntimeInformation]::IsOSPlatform($([System.Runtime.InteropServices.OSPlatform]::Linux)))' == 'true'">AAA;IS_LINUX</DefineConstants>

patricksuo

using System;

namespace threadpool_bench
{
    class Program
    {
        static int totalRound;
        static System.Threading.ManualResetEventSlim finishEvent;

        static System.Threading.WaitCallback job = obj =>

patricksuo

PWD=`pwd`
for file in `find $PWD`; do
	echo $file
	sed -i 's/XXX/YYY/g' $file
done

patricksuo

package power2

// 如果一个数是2的整数次方，那么 取模 可以有优化成一条 AND 指令
// http://graphics.stanford.edu/~seander/bithacks.html#RoundUpPowerOf2
// 思想是把最高有效位塞给其余的地位，第一次塞1位，第二次塞2位，第三次塞4位 第四次塞8位 第五次塞16位
// 最多需要做 lg(N) 次 SHIFT ＋ lg(N) 次 OR 既可， N是参数的位数
// run on go playground https://play.golang.org/p/-3O7xKuQ-D
func RoundUpPowerOf2(a uint32) uint32 {
        if a <= 1 {
                return 2