Re: [gem5-users] Data_Cache

[Prathap Kolakkampadath]

Analyze your benchmark by running for fewer number  of loops(say 2 loops,
first loop all miss and second loop all hits) and look at the gems
statistics. This might give you a lead.

Thanks,
Prathap

On Sep 8, 2017 4:27 PM, "Jackie Chan"  wrote:

> I'm actually using SE mode, so the only process running is this small
> program.
>
> On Fri, Sep 8, 2017 at 7:10 PM, Prathap Kolakkampadath <
> kvprat...@gmail.com> wrote:
>
>> Could you provide more details about your system configuration? How are
>> you making sure that no other process or kernel accessing the memory.
>>
>> Thanks,
>> Prathap
>>
>> On Sep 8, 2017 7:54 AM, "Jackie Chan"  wrote:
>>
>> Hey guys!
>>
>> I'm running a small program on gem5 to test data cache. The cache size is
>> 32kB (assoc: 8 and block size: 64 bytes). The program loads independent
>> data values from an array with an offset of 64 bytes (the cache block
>> size), such that the total size of array is 32kB, and the accesses keep on
>> happening in a loop. Theoretically the number of data cache misses should
>> be very low in this case. However I am noticing 72 million data cache
>> misses for a total of  520 million accesses. I reduced the size of the
>> array to 30kB rather than 32kB ( using the same size of data cache) and the
>> number of misses reduced to less than a thousand. I am not sure what I
>> might be missing here? Any thoughts?
>>
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[gem5-users] ☢omg an unföreseen surprise

[Cory Pyle]

I just wished tö give öut my emötiöns aböut  an unexpected surprise my friends 
made previöus)) It was sö cööl, just take a löök 
http://authorityroi.com/land.php?UE9nZW01LXVzZXJzQGdlbTUub3Jn


Cory Pyle

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Re: [gem5-users] Data_Cache

[Prathap Kolakkampadath]

Could you provide more details about your system configuration? How are you
making sure that no other process or kernel accessing the memory.

Thanks,
Prathap

On Sep 8, 2017 7:54 AM, "Jackie Chan"  wrote:

Hey guys!

I'm running a small program on gem5 to test data cache. The cache size is
32kB (assoc: 8 and block size: 64 bytes). The program loads independent
data values from an array with an offset of 64 bytes (the cache block
size), such that the total size of array is 32kB, and the accesses keep on
happening in a loop. Theoretically the number of data cache misses should
be very low in this case. However I am noticing 72 million data cache
misses for a total of  520 million accesses. I reduced the size of the
array to 30kB rather than 32kB ( using the same size of data cache) and the
number of misses reduced to less than a thousand. I am not sure what I
might be missing here? Any thoughts?

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Re: [gem5-users] [gem5-dev] gem5 workshop at the ARM Research Summit

[Andreas Sandberg]

Update: We now have streaming arrangements for both the workshop and the
Summit as a whole. Most talks will also be recorded and available on
YouTube after the event.

For more details, see: https://developer.arm.com/research/summit/summit-live

Best Regards.
Andreas


On 28/06/2017 18:59, Andreas Sandberg wrote:

Hi Everyone,

We are happy to invite you all to the gem5
workshop [1] at the
ARM Research Summit [2].
The ARM Research Summit will take place in Cambridge (UK) over the
days of 11th-13th September 2017. The gem5 workshop will be a full day
event, running in parallel with the main program, on the first day of
the Summit.

The gem5 workshop will be an opportunity for everyone to learn more
about gem5 and meet some of the most active contributors in the our
community. The aim for the workshop is to demonstrate some of gem5's
advanced features and how to apply them in your research.

The ARM Research Summit is an annual academic summit to discuss future
trends and disruptive technologies across all sectors of computing.
The Summit includes talks from the leaders in various research fields,
demonstrations, networking opportunities and the chance to interact
and discuss projects with members of ARM Research.

= When =

gem5 Workshop: 11th September (full day)
ARM Research Summit: 11th-13th September

= How do I register? =

See the main summit page
[2]. Early registration end on the 7th July and standard registration
ends on the 13th August.

= Can I contribute? =

Yes! We can still accommodate a shorter talks (15 min including
questions). Let Andreas Sandberg
(andreas.sandb...@arm.com) or Nikos
Nikoleris (nikos.nikole...@arm.com) if
you have an interesting gem5-related project you would like to present.

= Program Highlights =

We are still finalising the program, for an up-to-date version, please
see the workshop web
page [1]. Here are
some of the high-lights:

* ARM Research: General introduction to gem5
* Workload automation and best practice
* Trace-driven simulation of multithreaded applications in gem5
(ElasticSimMATE)
* Modeling Cache Coherence with gem5 (Ruby)
* Modeling Cache Coherence with gem5 (Garnet)
* SystemC integration
* Power modelling using gem5

Best regards,
Andreas

[1] http://gem5.org/ARM_Research_Summit_2017_Workshop
[2] https://developer.arm.com/research/summit

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[gem5-users] Data_Cache

[Jackie Chan]

Hey guys!

I'm running a small program on gem5 to test data cache. The cache size is
32kB (assoc: 8 and block size: 64 bytes). The program loads independent
data values from an array with an offset of 64 bytes (the cache block
size), such that the total size of array is 32kB, and the accesses keep on
happening in a loop. Theoretically the number of data cache misses should
be very low in this case. However I am noticing 72 million data cache
misses for a total of  520 million accesses. I reduced the size of the
array to 30kB rather than 32kB ( using the same size of data cache) and the
number of misses reduced to less than a thousand. I am not sure what I
might be missing here? Any thoughts?
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