Eyes Above The Waves
Robert O'Callahan. Christian. Repatriate Kiwi. Hacker.
Sunday, 9 January 2022
The End Of The Runway
As of January 10 I'm leaving day-to-day work on Pernosco and joining Google's NZ office. Pernosco is doing OK. We signed up signifi...
Sunday, 19 December 2021
Mt Pirongia 2021
On Friday I took advantage of the Auckland border having opened (on Wednesday) to travel down to Mt Pirongia and tramp to the summit, stayin...
Saturday, 18 December 2021
Do We Really Need A Link Step?
mold looks pretty cool, and a faster drop-in ld replacement is obviously extremely useful. But having no link step at all would be even fa...
Tuesday, 9 November 2021
Some Observations On The NZ CovidPass System
NZ's Ministry of Health has published a specification for the data in the CovidPass QR code. The spec looks pretty good to me; there...
Monday, 4 October 2021
How WHO Failed
I see that WHO is in contention for the Nobel Peace Prize. This is absurd. WHO got almost everything wrong early in the COVID19 pandemic a...
Sunday, 12 September 2021
Emulating AMD Approximate Arithmetic Instructions On Intel
Pernosco accepts uploaded rr recordings from customers and replays them with binary instrumentation to build a database of all program ex...
Thursday, 9 September 2021
rr Trace Portability: Diverging Behavior of RSQRTSS in AMD vs Intel
When we added Zen support to rr , it was an open question whether it would be possible to reliably replay Zen recordings on Intel CPUs or vi...
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