[Qemu-devel] Logging number of translated instructions per basic block

[Qemu-devel] Logging number of translated instructions per basic block

[Anthony Carno]

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Hi there,

As the subject of my email suggests, is there a way to log the number of
translated instructions per basic block?  I've dug into the debug code a
bit (specifically *target_disas *and the arch-specific *print_insn_**) and
haven't found anything that would suggest this is doable, but before I go
and move on to my plan B (which is devising a plan C haha), I'd like to ask
and make sure I'm not missing something.  Thank you!

Respectfully,
Anthony Carno

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Re: [Qemu-devel] Logging number of translated instructions per basic block

[Christopher Covington]

Hi Anthony,

On 07/28/2015 05:20 PM, Anthony Carno wrote:
> Hi there,
> 
> As the subject of my email suggests, is there a way to log the number of
> translated instructions per basic block?  I've dug into the debug code a bit
> (specifically /target_disas /and the arch-specific /print_insn_*/) and haven't
> found anything that would suggest this is doable, but before I go and move on
> to my plan B (which is devising a plan C haha), I'd like to ask and make sure
> I'm not missing something.  Thank you!

I just posted a rather unruly (but functional) set of patches with the cover
letter title of "RFC: ARM Semihosting, PMU, and BBV Changes". These changes
include support for collecting block vectors, which are nothing more than
accumulating instruction counts broken per block (and interval). While I would
guess there are probably much better ways to implement the same functionality,
perhaps it's a starting point.

Christopher Covington

-- 
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

Re: [Qemu-devel] Logging number of translated instructions per basic block

[Christopher Covington]

On 08/05/2015 01:11 PM, Christopher Covington wrote:
> Hi Anthony,
> 
> On 07/28/2015 05:20 PM, Anthony Carno wrote:
>> Hi there,
>>
>> As the subject of my email suggests, is there a way to log the number of
>> translated instructions per basic block?  I've dug into the debug code a bit
>> (specifically /target_disas /and the arch-specific /print_insn_*/) and haven't
>> found anything that would suggest this is doable, but before I go and move on
>> to my plan B (which is devising a plan C haha), I'd like to ask and make sure
>> I'm not missing something.  Thank you!

Perhaps a better answer than my previous one is cpu_get_ticks() when -icount
is used:

https://lists.gnu.org/archive/html/qemu-devel/2015-05/msg00162.html

Christopher Covington

-- 
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project