pushkarnk

Iteration	Time taken in checkpointing run (ms)	Time taken in the restore run (ms)
0	37101493	15505
100	106442	13759
200	46307	13480
300	29963	22211
400	31919	10546
500	18090	9150
600	15226	8032
700	15086	9639

pushkarnk

import java.util.*;
import java.lang.*;
import java.text.*;
import jdk.crac.*;

public class PrimeTime implements jdk.crac.Resource {
    /* - get the current time in milliseconds - T1
       - print the time as a human readable date
       - reverse the digits in T1 to create a T2
       - print the time T2 as a human readable date

pushkarnk

FROM ubuntu/chiselled-jre:8-22.04_edge as chiselled-jdk8

FROM ubuntu:16.04

# Run as a non-root user
RUN addgroup --system test
RUN adduser --system testuser --ingroup test
USER testuser:test

COPY --from=chiselled-jdk8 /usr/lib/jvm/java-8-openjdk-amd64 /usr/lib/jvm/java-8-openjdk-amd64

pushkarnk

#include <openssl/evp.h>
#include <stdio.h>

typedef enum Algo {
    AlgoDH, AlgoEC
} Algo;

int generate_shared_secret(EVP_PKEY *private_key,
    			EVP_PKEY *peer_public_key,
     			unsigned char **secret) {

pushkarnk

#define	_XOPEN_SOURCE_EXTENDED 1
#define _OPEN_THREADS
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <errno.h>

pushkarnk

Random points on Direct IO

1. Files reside on disks. When they are opened, their contents are cached in the kernel space. They may also be cached in user-space by applications.

2. Reads and writes to files, by default, actually happen on their kernel-cached copy. The actual commit to the hard disk happens asynchronously, sometime later.

3. Of course, the OS kernels do ensure correctness of reads and writes in almost all the cases, while implementing optimizations to reduce the number of reads and writes from the disk sectors.

pushkarnk

const WebSocket = require('ws');

for (i=0; i < 50; i++) {
    let ws = this.ws = new WebSocket("ws://localhost:9001/");
    ws.onopen = (event) => {
      console.log("Websocket opened");
      ws.send("This is the first message that was sent");
      ws.send("This is the second message that was sent");
    };

pushkarnk

struct Foo {
  var bar
  let foo
}

pushkarnk

extension Optional {
    var isNil: Bool {
        switch self {
        case .none: return true
        case .some: return false
        }
    }
}

pushkarnk

    dependencies: [
        // Dependencies declare other packages that this package depends on.
        .package(url: "https://github.com/IBM-Swift/Kitura", .branch("kitura-nio")),
    ],