lvshaco

/*
 * Number of worker threads that have finished setting themselves up.
 */
static int init_count = 0;
static pthread_mutex_t init_lock;
static pthread_cond_t init_cond;

----main thread------------------------------------------------------------------------

lvshaco

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

lvshaco

#! /bin/bash
if [[ $1 -eq 0 ]];then
   echo "usage:$0 pid"
   exit
fi
 
TMPFILE="${TMPDIR:=/tmp}/pstack$$"
 
# Remove TMPFILE on termination
trap 'rm -f "$TMPFILE" >/dev/null 2>&1' 0

lvshaco

// additional library DbgHelp.lib
#include <winbase.h>
#include <dbghelp.h> 

static void _create_dump_file(const char* dumpfile, EXCEPTION_POINTERS* exception) {
    HANDLE hfile = CreateFile(dumpfile, 
        GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);  

    MINIDUMP_EXCEPTION_INFORMATION dumpinfo;  
    dumpinfo.ExceptionPointers = exception;  

lvshaco

// 在项目设置中General选项设置：Character Set -> Use Multi-Byte Character Set
#include <windows.h>
#include <stdio.h>

int main(int argc, char* argv[]) {
    if (argc < 2) {
        printf("usage: %s error_id\n", argv[0]);
        return -1;
    }
    DWORD errid = strtoul(argv[1], NULL, 10);