Re: [gem5-users] Garnet 2.0: Average Network Latency is missing!!!

2017-05-30 Thread Krishna, Tushar 
I’m not sure if you will be able to get the exact result, partly because the 
microarchitecture has changed.
You can play with router delay to 4 cycles, but the throughput might be a 
little different.
Also — I’m not sure if the garnet paper results are all with 1-flit packets or 
a mix.
To inject 1-flit packets only, you can add --inj-vnet=0 when running with 
garnet2.0


On May 26, 2017, at 10:37 AM, F. A. Faisal 
> wrote:

Thanks a lot for the reply,

Basically, I like to obtain the same result which is available in the reference 
paper of Garnet.

In case of 8x8 mesh network with same configuration of four VCs with having 
each 4-flit buffers_per_data_vc (16 flits/port), we could obtain similar 
results as the paper till 0.175 injection rate, but if we consider the 
injection rate is 0.20, this simulation result (garnet 1.0 and fixed pipeline 
router) shows the average latency more than 300cycles. However, the paper shows 
about 60 cycles even for 0.30 injection rate.

In case of Garnet 2.0 >> 0.20 injection rate shows 130.76cyc

I also make sure the router stage is equal to 5  by considering the flexible 
option (garnet 1.0) and reduce the number of data flits with 
block_size_bytes=16, which also shows the average latency as above the 300 
clock cycles.

Please let me know if there is any more configuration to be done to obtain the 
referenced paper result.

./build/ALPHA_Network_test/gem5.debug configs/example/ruby_network_test.py 
--num-cpus=64 --num-dirs=64 --topology=Mesh --mesh-rows=8  --sim-cycles=1 
--injectionrate=0.15 --synthetic=0 --garnet-network=fixed

Thanks and best regards,

F. A. Faisal
..

On Thu, May 25, 2017 at 2:47 AM, Krishna, Tushar 
> wrote:
Average Network Latency has just been renamed to Average Network Flit Latency 
since Garnet2.0 also reports the Average Network Packet Latency.


Please take a look at the gem5 wiki for a detailed description of garnet1.0 vs 
2.0.
http://www.gem5.org/Garnet
http://www.gem5.org/Garnet2.0

I’m not sure what validating one against the other means.

Garnet2.0 uses a 1-cycle router by default so the network latency is not 
expected to match that from the original garnet1.0 paper which assumed a 
4-cycle router as the default.
You can mimic a 4-cycle router in garnet2.0 by setting --router-latency=4 (look 
at configs/network/Network.py) but it will not match exactly.

Cheers,
Tushar



On May 24, 2017, at 6:11 AM, F. A. Faisal 
> wrote:

Dear All,

I wanted to validate the garnet 2.0 with garnet 1.0.
Hence, I like to get the average network latency or the average latency. 
However, this parameter is missing from the stats.txt file in garnet 2.0.
And even I compare the average packet latency of garnet 2.0 (21.487374) with 
the garnet 1.0 average latency (40.403994) for 8x8 mesh with same configuration 
as referenced paper of garnet, which is completely different.

Please let me know how to validate garnet 2.0 as of garnet 1.0.

Thanks in advance.

Best regards,

F. A. Faisal
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Re: [gem5-users] Garnet 2.0: Average Network Latency is missing!!!

2017-05-26 Thread F. A. Faisal 
Thanks a lot for the reply,

Basically, I like to obtain the same result which is available in the
reference paper of Garnet.

In case of 8x8 mesh network with same configuration of four VCs with having
each 4-flit buffers_per_data_vc (16 flits/port), we could obtain similar
results as the paper till 0.175 injection rate, but if we consider the
injection rate is 0.20, this simulation result (garnet 1.0 and fixed
pipeline router) shows the average latency more than 300cycles. However,
the paper shows about 60 cycles even for 0.30 injection rate.

In case of Garnet 2.0 >> 0.20 injection rate shows 130.76cyc

I also make sure the router stage is equal to 5  by considering the
flexible option (garnet 1.0) and reduce the number of data flits with
block_size_bytes=16, which also shows the average latency as above the 300
clock cycles.

Please let me know if there is any more configuration to be done to obtain
the referenced paper result.

./build/ALPHA_Network_test/gem5.debug configs/example/ruby_network_test.py
--num-cpus=64 --num-dirs=64 --topology=Mesh --mesh-rows=8
 --sim-cycles=1 --injectionrate=0.15 --synthetic=0
--garnet-network=fixed

Thanks and best regards,

F. A. Faisal
..

On Thu, May 25, 2017 at 2:47 AM, Krishna, Tushar 
wrote:

> Average Network Latency has just been renamed to Average Network Flit
> Latency since Garnet2.0 also reports the Average Network Packet Latency.
>
>
> Please take a look at the gem5 wiki for a detailed description of
> garnet1.0 vs 2.0.
> http://www.gem5.org/Garnet
> http://www.gem5.org/Garnet2.0
>
> I’m not sure what validating one against the other means.
>
> Garnet2.0 uses a 1-cycle router by default so the network latency is not
> expected to match that from the original garnet1.0 paper which assumed a
> 4-cycle router as the default.
> You can mimic a 4-cycle router in garnet2.0 by setting --router-latency=4
> (look at configs/network/Network.py) but it will not match exactly.
>
> Cheers,
> Tushar
>
>
>
> On May 24, 2017, at 6:11 AM, F. A. Faisal  wrote:
>
> Dear All,
>
> I wanted to validate the garnet 2.0 with garnet 1.0.
> Hence, I like to get the average network latency or the average latency.
> However, this parameter is missing from the stats.txt file in garnet 2.0.
> And even I compare the average packet latency of garnet 2.0 (21.487374)
> with the garnet 1.0 average latency (40.403994) for 8x8 mesh with same
> configuration as referenced paper of garnet, which is completely different.
>
> Please let me know how to validate garnet 2.0 as of garnet 1.0.
>
> Thanks in advance.
>
> Best regards,
>
> F. A. Faisal
> ___
> gem5-users mailing list
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>
>
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Re: [gem5-users] Garnet 2.0: Average Network Latency is missing!!!

2017-05-24 Thread Krishna, Tushar 
Average Network Latency has just been renamed to Average Network Flit Latency 
since Garnet2.0 also reports the Average Network Packet Latency.


Please take a look at the gem5 wiki for a detailed description of garnet1.0 vs 
2.0.
http://www.gem5.org/Garnet
http://www.gem5.org/Garnet2.0

I’m not sure what validating one against the other means.

Garnet2.0 uses a 1-cycle router by default so the network latency is not 
expected to match that from the original garnet1.0 paper which assumed a 
4-cycle router as the default.
You can mimic a 4-cycle router in garnet2.0 by setting --router-latency=4 (look 
at configs/network/Network.py) but it will not match exactly.

Cheers,
Tushar



On May 24, 2017, at 6:11 AM, F. A. Faisal 
> wrote:

Dear All,

I wanted to validate the garnet 2.0 with garnet 1.0.
Hence, I like to get the average network latency or the average latency. 
However, this parameter is missing from the stats.txt file in garnet 2.0.
And even I compare the average packet latency of garnet 2.0 (21.487374) with 
the garnet 1.0 average latency (40.403994) for 8x8 mesh with same configuration 
as referenced paper of garnet, which is completely different.

Please let me know how to validate garnet 2.0 as of garnet 1.0.

Thanks in advance.

Best regards,

F. A. Faisal
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[gem5-users] Garnet 2.0: Average Network Latency is missing!!!

2017-05-24 Thread F. A. Faisal 
Dear All,

I wanted to validate the garnet 2.0 with garnet 1.0.
Hence, I like to get the average network latency or the average latency.
However, this parameter is missing from the stats.txt file in garnet 2.0.
And even I compare the average packet latency of garnet 2.0 (21.487374)
with the garnet 1.0 average latency (40.403994) for 8x8 mesh with same
configuration as referenced paper of garnet, which is completely different.

Please let me know how to validate garnet 2.0 as of garnet 1.0.

Thanks in advance.

Best regards,

F. A. Faisal
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