tuxology

Vagrant.configure(2) do |config|
  config.vm.define :kerneldev do |kerneldev|
    kerneldev.vm.box = "fedora/23-cloud-base"
    kerneldev.vm.provider :libvirt do |domain|
      domain.memory = 2048
      domain.cpus = 4
    end
  config.vm.provision :shell, :path => "bootstrap.sh"
 end
end

tuxology

#!/bin/bash                                                                                                                                 

set_scaling_gov() {
        gov=${1-performance}
        for i in $(ls -1 /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor); do
                echo ${gov} | sudo tee $i > /dev/null
        done
}

set_scaling_gov

tuxology

[root@linus tracing]# cat trace
# tracer: irqsoff
#
# irqsoff latency trace v1.1.5 on 4.3.0-rc3+
# --------------------------------------------------------------------
# latency: 9994 us, #14/14, CPU#1 | (M:desktop VP:0, KP:0, SP:0 HP:0 #P:4)
#    -----------------
#    | task: insmod-29922 (uid:0 nice:0 policy:0 rt_prio:0)
#    -----------------
#  => started at: do_one_initcall

tuxology

Installing EPOC Emulator

Fedora

• Install Wine : sudo dnf install wine
• Download the Symbian OS V5 emulator from here
• Extract the files under ~/.wine/dosdevices/c:/

Running the EPOC Emulator

tuxology

          <idle>-0     [000] d... 318152.015828: do_IRQ <-ret_from_intr
          <idle>-0     [000] d.h. 318152.015832: irq_handler_entry: irq=45 name=iwlwifi
          <idle>-0     [000] dNh. 318152.015837: sched_wakeup: comm=irq/45-iwlwifi pid=598 prio=49 success=1 target_cpu=000
          <idle>-0     [000] d... 318152.015846: sched_switch: prev_comm=swapper/0 prev_pid=0 prev_prio=120 prev_state=R ==> next_comm=irq/45-iwlwifi next_pid=598 next_prio=49
  irq/45-iwlwifi-598   [000] d.s. 318152.015894: sched_wakeup: comm=ping pid=27782 prio=120 success=1 target_cpu=002
          <idle>-0     [002] d... 318152.015943: sched_switch: prev_comm=swapper/2 prev_pid=0 prev_prio=120 prev_state=R ==> next_comm=ping next_pid=27782 next_prio=120
            ping-27782 [002] .... 318152.015952: sys_exit: NR 47 = 84
            ping-27782 [002] .... 318152.015983: sys_exit: NR 1 = 97

tuxology

#!/bin/bash
set -e -x

git clone https://github.com/svinota/pyroute2.git
(cd pyroute2; make install)

numcpu=$(grep -c ^processor /proc/cpuinfo)

git clone https://github.com/iovisor/bcc.git
mkdir bcc/build/

tuxology

#!/bin/bash
set -e -x
numcpu=$(grep -c ^processor /proc/cpuinfo)

git clone https://github.com/llvm-mirror/llvm.git
git clone https://github.com/llvm-mirror/clang.git llvm/tools/clang
mkdir llvm/build/
cd llvm/build/

cmake .. \

tuxology

/*
 * addons/lttng-sched-filter.c
 *
 * A filtered version of sched_switch
 *
 * Copyright (C) 2014 Suchakra Sharma <suchakrapani.sharma@polymtl.ca>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; only

tuxology

/*
 * addons/lttng-netif-filter.c
 *
 * A filtered version of netif_receive_skb
 *
 * Copyright (C) 2014 Suchakra Sharma <suchakrapani.sharma@polymtl.ca>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; only

tuxology

/* 
 * Get address from symbol (libdwarf version)
 * Based on code by : Eli Bendersky (http://eli.thegreenplace.net) 
 *
 */

#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>