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Re: [Qemu-devel] Executed Host Instructions

From: Peter Maydell
Subject: Re: [Qemu-devel] Executed Host Instructions
Date: Tue, 28 Jun 2016 12:17:52 +0100

On 28 June 2016 at 11:50, Lluís Vilanova <address@hidden> wrote:
> Ayaz Akram writes:
>> Hi All,
>> I want to count number of host instructions (only for guest code)  executed
>> when qemu emulates an application. I wonder if helper functions are
>> supported with tcg back end as well, which can be a possible solution for
>> the mentioned problem ? If not, is there any other solution in someone's
>> mind ?
> If you don't care about helpers, you can use QEMU's log functionality (-d
> out_asm).

Note that this doesn't directly count instructions -- it only
displays the assembly at translate time, and you'd then have
to calculate the actual executions based on -d exec logging,
and adjust it to deal with exceptions.

It ought to be possible to use the icount machinery to trace
instruction execution counts, but we don't do it today.

-- PMM

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