Alex Bradbury | Igalia - Open Source Consultancy and Development

Alex Bradbury

Alex Bradbury

At Igalia since March 2022.

Cambridge (UK)

POSTS

Feb 11, 2026

shandbox

shandbox is a simple Linux sandboxing script that serves my needs well. Perhaps it works for you too? No dependencies between a shell and util-linux (unshare and nsenter). In short,...

Continue reading >

Jan 7, 2026

Per-query energy consumption of LLMs

How much energy is consumed when querying an LLM? We’re largely in the dark when it comes to proprietary models, but for open weight models that anyone can host on...

Continue reading >

Dec 2, 2025

QEMU-based instruction execution counting

Although analysing performance by way of instruction counting has obvious limitations, it can be helpful (especially when combined with appropriate analysis scripts) to get rapid feedback on the impact of...

Continue reading >

Dec 1, 2025

Minipost: Olmo 3 training cost

Recently I jotted down some notes on LLM inference vs training costs for DeepSeek and I wanted to add on an additional datapoint for training cost based on the recently...

Continue reading >

Media

Improvements to RISC-V Vector Code Generation in LLVM

Improvements to RISC-V Vector Code Generation in LLVM

Jul 7, 2025 Slides (354 KB PDF)

Lessons learned from leveling up RISC-V LLVM testing

Lessons learned from leveling up RISC-V LLVM testing

Jun 9, 2025

RISC-Y Business

RISC-Y Business

Jan 31, 2025

Toots

There are many tools for unprivileged sandboxing on Linux. You should probably go use one of them. But I wrote...

2% of Golang 2025 survey respondents are deploying their Go software to RISC-V. Take that, s390x! https://go.dev/blog/survey2025#operating-systems-and-architectures

Wake up babe, new proposed RISC-V base ISA names just dropped. https://lists.riscv.org/g/tech-unprivileged/topic/longer_base_name_proposal/116854896How long until we see an rv32lbefx_mafc_zicntr_zicsr_zifencei_zba_zbb_zbs_zca_zfa in the...

I’ve started writing up the flow I use for capturing instruction execution frequency data from benchmarks using QEMU. First we...

Commits

[LLVM] [clang][test] Set triple explicitly for attr-no-outline.m test (#181621)

[LLVM] Revert "[DAG] Enable bitcast STLF for Constant/Undef" (#178872)

[QEMU] contrib/plugins/hotblocks: Print uint64_t with PRIu64 rather than PRId64

[QEMU] docs/about/emulation: Add documentation for hotblocks plugin arguments