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I am a newbie using Intel PT for the trace. I have read Intel PT manual and started to use it with simple-pt to understand how Intel PT works.

sptcmd command in simple-pt works and generates ptout.N with following command. 

sudo ./sptcmd -c ls ls

When I use sptdecode as follows:
sudo ./sptdecode --sideband ptout.sideband --pt ptout.0

I get the following response:

TIME DELTA INSNs OPERATION
50:0: error trace stream does not match query
50: sync forward: trace stream does not match query

I have tried with boot argument of nopti as mentioned on simple-pt Git repo.

Additional information about setup which maybe relevant:
Compiled and built simple-pt from Git repo https://github.com/andikleen/simple-pt.
Using libipt by building from latest Git repo https://github.com/01org/processor-trace.
Using Ubuntu - 16.04

I am not sure what I am missing. Any help or pointers are appreciated.

Yogita
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  • How exactly did you run the command to create the `ptout.*` files? The github readme shows `sptcmd -c tcall taskset -c 0 ./tcall` as an example. Include your exact command in the question to make this a [mcve]. – Peter Cordes Dec 13 '18 at 03:57
  • Thank you Peter for feedback. I ran the trace for `ls` command as edited above and same is mentioned in another example on Github. – Yogita Dec 13 '18 at 22:04

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