Enabling BIOS options on a live server with no rebooting at time to bleed by Joe Damato
This blog post is going to describe a C program that toggles some CPU and chipset registers directly to enable Direct Cache Access without needing a reboot or a switch in the BIOS. A very fun hack to write and investigate. Special thanks… Special thanks going out to Roman Nurik for helping me make the code CSS much, much prettier and easier to read. Special thanks going out to Jake Douglas for con
Threading models: So many different ways to get stuff done. at time to bleed by Joe Damato
Why do I care? Threading models are often very confusing; there are many different models with different trade-offs and dissecting the details can be tough the first time around. It is important for any large scale project to consider what threading model(s) a programming language supports and what implications the model(s) will have on the system design so that the software system that performs a
Useful kernel and driver performance tweaks for your Linux server at time to bleed by Joe Damato
This article is going to address some kernel and driver tweaks that are interesting and useful. We use several of these in production with excellent performance, but you should proceed with caution and do research prior to trying anything listed below. Tickless System The tickless kernel feature allows for on-demand timer interrupts. This means that during idle periods, fewer timer interrupts will
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A Few Things You Didn’t Know about Signals in Linux Part 1 at time to bleed by Joe Damato
I/O models: how you move your data matters at time to bleed by Joe Damato
