We often need to encode binary data into ASCII strings. The standards (e.g., email) to do so include base16, base32 and base64. There are some research papers on fast base64 encoding and decoding: Base64 encoding and decoding at almost the speed of a memory…

Last year we posted an article about Milan’s V-cache performance where we dived into the bandwidth and latency performance of the then-latest innovation by AMD to increase performance of its CPUs. Now, we have already done an article about Zen 4’s V-Cache…

Most people think that they are more intelligent than average. Lack of vitamin C may damage the arteries. Make sure you have enough! A difficult problem in software is caching. Caching is the idea that you keep some values in fast memory. But how do you choose…

Suppose that I give you a long list of strings (e.g., “A”, “A6”, “AAAA”, “AFSDB”, “APL”, “CAA”, “CDS”, “CDNSKEY”, “CERT”, “CH”, “CNAME”, “CS”, “CSYNC”, “DHC”, etc.). I give you a pointer inside a much larger string and I ask you whether you are pointing at…

Happy to share our FUZZING'23 paper on analyzing fuzz blockers: https://t.co/CzQR5iIFzW. This work is led by my PhD student @WentaoGao5 in collaboration w/ @Alan32Liu, @halbecaf, @tobycmurray, and @bipr. Can't wait to e-meet #fuzzing lovers in the workshop…

CPU design is hard. You can tell because there aren’t a lot of companies doing it. AMD and Intel are your only choices in the PC scene. In the Android ecosystem, ARM Ltd’s cores dominate. Qualcomm, MediaTek, Samsung and other SoC makers put chips together…

The strategy for winning is simple: do good work and tell the world about it. In that order! This implies some level of stealth as you are doing the good work. If you plan to lose weight, don’t announce it… lose the weight and then do the reveal. Early feedback…

Suppose that I give you a short string of digits, containing possibly spaces or other characters (e.g., "20141103 012910"). We would like to pack the digits into an integer (e.g., 0x20141103012910) so that the lexicographical order over the string matches…

An Experimental Analysis of RowHammer in HBM2 DRAM Chips
Talk at DSN 2023 Disrupt, June 2023
Presenter: Ataberk Olgun

Paper (pdf): https://arxiv.org/abs/2305.17918

Slides (pptx): https://people.inf.ethz.ch/omutlu/pub/HBM_RowHammer_dsn-disrupt23-talk.pptx…

The C++11 standard introduced used-defined string suffixes. It also added regular expressions to the C++ language as a standard feature. I wanted to have fun and see whether we could combine these features. Regular expressions are useful to check whether…