[TUHS] kernel debugging in analogue
steve at quintile.net
Sat Jul 2 09:38:11 AEST 2022
i remember a fellow student debugging an lsi11 kernel using a form of analogue vectorscope.
i think it had a pair of DACs attached to the upper bits of the address bus. it generated a 2d pattern which you could recognise as particular code - interrupts are here, userspace is there, etc.
the brightness of the spot indicated the time spent, so you got a bit of profiling too - and deadlocks became obvious.
anyone remember these, what where they called? i think it was an HP or Tek product.
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