A simple DTrace script for writev & friends
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README.md
tracewrite.d

README.md

tracewrite - a simple DTrace script for writev & friends

Usage:

sudo dtrace -s tracewrite.d -p <process ID>

(If you've only got one instance of the BEAM running, you might do -p $(pgrep beam) for convenience.)

DTrace doesn't support looping constructs so there are separate actions for the first ~15 entries of the writev vector.