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arilou / malloc.c
Created October 6, 2019 17:09 — forked from qi7chen/malloc.c
malloc by Doug Lea, source file
/*
This is a version (aka dlmalloc) of malloc/free/realloc written by
Doug Lea and released to the public domain, as explained at
http://creativecommons.org/licenses/publicdomain. Send questions,
comments, complaints, performance data, etc to dl@cs.oswego.edu
* Version 2.8.4 Wed May 27 09:56:23 2009 Doug Lea (dl at gee)
Note: There may be an updated version of this malloc obtainable at
ftp://gee.cs.oswego.edu/pub/misc/malloc.c
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arilou / qemu-tracing.md
Created April 2, 2019 03:12 — forked from mcastelino/qemu-tracing.md
Tracing QEMU-KVM Interactions

Tracing QEMU-KVM Interactions

But default in linux you can figure out how many times and for what reasons there is a VM Exit from a VM into the kvm kernel module. However given the ubiquity of vhost and the ability of kvm to emulate most device models directly in the kernel, most of those VM exits do not result in a transition from host kernel into the QEMU. The transitions from VM -> kvm -> QEMU are typically the most expensive.

Here we try to figure out how many of the VM Exits result in the invocation of QEMU.

Tracking VM-KVM Interactions

This can be done very simply with perf