Arie

Updating firmware:

1. Boot Ubuntu USB stick
2. Enable universe repository (add universe after the security.ubuntu.com line in `/etc/apt/sources.list)`
3. `apt-get update && apt-get install ethtool mstflint`
4. Find PCI ID with `lspci`
5. Find PS ID of mellanox card: `mstflint -d pci-id-here q`
6. Download and unzip firmware for the correct PS ID from https://network.nvidia.com/support/firmware/firmware-downloads/

Arie

echo performance > /sys/devices/system/cpu/cpufreq/policy0/scaling_governor
echo performance > /sys/devices/system/cpu/cpufreq/policy4/scaling_governor
echo performance > /sys/devices/system/cpu/cpufreq/policy6/scaling_governor

######

echo ondemand > /sys/devices/system/cpu/cpufreq/policy0/scaling_governor
echo ondemand > /sys/devices/system/cpu/cpufreq/policy4/scaling_governor
echo ondemand > /sys/devices/system/cpu/cpufreq/policy6/scaling_governor
echo 10 > /sys/devices/system/cpu/cpufreq/policy0/ondemand/up_threshold

Arie

#!/bin/sh

get_device_irq() {
        local device="$1"
        local line
        local seconds="0"

        # wait up to 10 seconds for the irq/device to appear
        while [ "${seconds}" -le 10 ]; do
                line=$(grep -m 1 "${device}\$" /proc/interrupts) && break

Arie

11111110 = fe = cores 1-7

11110000 = f0 = cores 4-7 (2.3Ghz fast)
11000000 = c0 = core 6+7
00110000 = 30 = core 4+5
11100000 = e0 = core 5+6+7

00001111 = f  = cores 0-3 (1.8Ghz efficient)
00001110 = e  = core 1+2+3
00001100 = c  = core 2+3

Arie

CONFIG_TARGET_ramips=y
CONFIG_TARGET_ramips_mt7621=y
CONFIG_TARGET_ramips_mt7621_DEVICE_ubnt-erx=y
# CONFIG_FEED_luci is not set
# CONFIG_FEED_packages is not set
# CONFIG_FEED_routing is not set
# CONFIG_FEED_telephony is not set
CONFIG_IMAGEOPT=y
CONFIG_LUCI_LANG_de=y
CONFIG_LUCI_LANG_en=y

Arie

CPU 0 Unable to handle kernel paging request at virtual address 00000000, epc == c016c184, r
a == 802b72c0
Oops[#1]:
CPU: 0 PID: 120 Comm: modprobe Tainted: P           O 3.10.14-UBNT #2
task: 8f501b28 ti: 8f4d2000 task.ti: 8f4d2000
$ 0   : 00000000 00000065 00000002 00000000
$ 4   : 80485b40 00000001 00000000 ffffffff
$ 8   : 00000000 80219ab0 20636972 000000ac
$12   : 76207265 00000006 00000000 69737265
$16   : c0171d80 8f47e180 80485b40 8fcd6b0c

Arie

require 'csv'

last_result = `tail -n1 /usr/share/cacti/site/scripts/speedtest.csv`

def bits_to_mbit(bits)
  bits / 1024.0 / 1024.0
end

CSV.parse(last_result) do |row|
  @ping = row[5].to_f

Arie

/usr/local/bin/speedtest-cli --server 13379 --csv >> /usr/share/cacti/site/scripts/speedtest.csv

Arie

`pip install flent matplotlib`
`brew install fping`

Netperf in homebrew is installed without demo mode by default, so we need to edit the recipe slightly, also demo mode fails to build under OS/X, requiring a tiny patch to netlib.c ( http://www.netperf.org/pipermail/netperf-talk/2013-December/001162.html ). The following recipe changes the URL to a prepatched version that I host and changes the configure line to enable demo mode.

`brew edit netperf`

```
class Netperf < Formula
  desc "Benchmarks performance of many different types of networking"

Arie

Let's go Postal!

And start using a real database

"mysql is a network-attached spreadsheet used by porn sites and other dodgy entities across the Internet." -- http://elnur.pro/avoid-mysql/