Skip to content

Instantly share code, notes, and snippets.

View sameo's full-sized avatar

Samuel Ortiz sameo

137 followers · 12 following
View GitHub Profile
@sameo
sameo / cid.patch
Created December 5, 2018 19:41
diff --git a/virtcontainers/utils/utils_linux.go b/virtcontainers/utils/utils_linux.go
index 31cb7d1..5f16aba 100644
--- a/virtcontainers/utils/utils_linux.go
+++ b/virtcontainers/utils/utils_linux.go
@@ -6,9 +6,9 @@
package utils
import (
- "crypto/rand"
+// "crypto/rand"
@sameo
sameo / firecracker-build.md
Last active December 6, 2018 14:45 
tools/devtool build -- --features vsock
@sameo
sameo / kata-jaeger.md
Last active December 3, 2018 16:09

Enable Kata open tracing support

$ grep enable_tracing /usr/share/defaults/kata-containers/configuration.toml
enable_tracing = true

Start the all-in-one Jaeger Docker container

docker run -d --name jaeger \
@sameo
sameo / firecraker-start-vm.md
Created November 30, 2018 21:43 
curl --unix-socket /tmp/firecracker.sock -i \
    -X PUT 'http://localhost/boot-source'   \
    -H 'Accept: application/json'           \
    -H 'Content-Type: application/json'     \
    -d '{
        "kernel_image_path": "/home/samuel/devlp/hypervisor/firecracker-data/hello-vmlinux.bin",
        "boot_args": "console=ttyS0 reboot=k panic=1 pci=off"
    }'
@sameo
sameo / acpi-processor.txt
Created November 7, 2018 17:51
#define ACPI_PROCESSOR_OBJECT_HID "LNXCPU"
#define ACPI_PROCESSOR_DEVICE_HID "ACPI0007"
static const struct acpi_device_id processor_device_ids[] = {
{ ACPI_PROCESSOR_OBJECT_HID, },
{ ACPI_PROCESSOR_DEVICE_HID, },
{ }
};
@sameo
sameo / nemu-boot-loop.sh
Last active October 23, 2018 18:10
#!/bin/bash
# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
# ex: ts=8 sw=4 sts=4 et filetype=sh
OPTS=`getopt -o b:e:f:i:k:m: --long binary:,exit:,firmware:,iterations:,kernel:,machine: -n 'parse-options' -- "$@"`
if [ $? != 0 ] ; then echo "Failed parsing options." >&2 ; exit 1 ; fi
eval set -- "$OPTS"
@sameo
sameo / qemu-upstream.md
Last active November 29, 2018 14:43
QEMU upstream submission scripts

Get maintainers

git diff --cached | ./scripts/get_maintainer.pl --nol | cut -d '(' -f 1 | awk '$0="Cc: "$0' | sed -e 's/[[:space:]]*$//'

git-request-pull

git request-pull upstream/master https://github.com/intel/nemu topic/upstream/acpi
@sameo
sameo / QEMU-boot-time.md
Last active September 27, 2018 13:40

Poor man's QEMU boot time benchmark

The idea is to add dummy IO port writes in the firmware, kernel and guest OS that will trigger VM exits. One can then ftrace those from the host and get kernel timestamp for each and every one of them.

This is very limited and only provides boot time stamps but allows to measure both the guest kernel and firmware boot times.

In this example we're using 0xf4 as the dummy port, and I patched the guest OVMF and kernel.

OVMF patch

@sameo
sameo / used-virt-files-pr80-20180917
Created September 17, 2018 15:31
accel/accel.c
accel/hw/boards.h
accel/hw/xen/xen.h
accel/kvm/exec/gdbstub.h
accel/kvm/exec/memory.h
accel/kvm/exec/ram_addr.h
accel/kvm/hw/hw.h
accel/kvm/kvm-all.c
accel/kvm/sev-stub.c
accel/kvm/sysemu/cpus.h
@sameo
sameo / nemu-kernel-4.18-config.txt
Created September 4, 2018 08:22
#
# Automatically generated file; DO NOT EDIT.
# Linux/x86 4.18.0 Kernel Configuration
#
#
# Compiler: gcc (GCC) 8.1.1 20180712 (Red Hat 8.1.1-5)
#
CONFIG_64BIT=y
CONFIG_X86_64=y