Project Zero: Reading privileged memory with a side-channel
Posted by Jann Horn, Project Zero We have discovered that CPU data cache timing can be abused to efficiently leak information out of mi...| googleprojectzero.blogspot.com
Posted by Jann Horn, Project Zero We have discovered that CPU data cache timing can be abused to efficiently leak information out of mi...| googleprojectzero.blogspot.com
Bash Reference Manual| www.gnu.org
At Stripe, we rely heavily on ruby and EventMachine to power various internal and external services. Over the last several months, we’ve known that one such service suffered from a gradual memory leak, that would cause its memory usage to gradually balloon from a normal ~50MB to multiple gigabytes. It was easy enough to work around the leak by adding monitoring and restarting the process whenever memory usage grew too large, but we were determined to track down the root cause.| Made of Bugs
At this point in my career, I’ve worked on at least three projects where performance was a defining characteristic: Livegrep, Taktician, and Sorbet (I discussed sorbet in particular last time, and livegrep in an earlier post). I’ve also done a lot of other performance work on the tools I use, some of which ended up on my other blog, Accidentally Quadratic. In this post, I want to reflect on some of the lessons I’ve learned while writing performant software, and working with rather a lot...| Made of Bugs
