[Gems-users] Generating traces with ruby

[Sean Ryan Leventhal <sleventh@xxxxxxxxxxxx>]

As far as I can tell the traces generated by ruby are compressed.  I 
execute the following sequence of commands to generate a trace:

read-configuration ../checkpoints/fft.4
magic-break-enable
dstc-disable
istc-disable
instruction-fetch-mode instruction-fetch-trace
load-module ruby
ruby0.setparam g_NUM_PROCESSORS 4
ruby0.init
ruby0.tracer-output-file test.gz
c
q

This produces a file test.gz
Attempting to unzip this I get the error:
gunzip: test.gz: unexpected end of file

What am I doing wrong?