回复：Re: 回复：Re: Different simulation results on different computers with the same configuration
The correct result is below:
average_packet_latency = 15.510408
average_packet_latency = 15.528615
average_packet_latency = 15.682214
average_packet_latency = 15.695504
average_packet_latency = 15.769957
average_packet_latency = 15.821728
average_packet_latency = 15.912262
average_packet_latency = 16.051925
average_packet_latency = 16.167249
average_packet_latency = 16.319634
average_packet_latency = 16.479105
average_packet_latency = 16.725313
average_packet_latency = 17.055812
average_packet_latency = 17.588959
average_packet_latency = 18.500431
average_packet_latency = 21.669417
average_packet_latency = 103.241365
average_packet_latency = 273.002675
average_packet_latency = 430.695013
average_packet_latency = 596.634683
average_packet_latency = 732.220679
average_packet_latency = 854.214438
average_packet_latency = 969.032975
average_packet_latency = 1087.468352
average_packet_latency = 1207.588344
1.gem5 version is v21.2.1.0
2.build command is ”scons build/NULL/gem5.opt -j 4"
3.run command is below and the "--injection-rate" is increasing with step=0.02
Command to Run:
./build/NULL/gem5.opt
configs/example/garnet_synth_traffic.py \
--network=garnet2.0 \
--num-cpus=64 \
--num-dirs=64 \
--topology=Mesh_XY \
--mesh-rows=8 \
--sim-cycles=10000 \
--inj-vnet=0 \
--injectionrate=0.02 \
--synthetic=uniform_random
I find some interesting phenomenons.
I think I figured out where the problem might be.
It might be the permission error and the build order.
I built "X86","ARM","NULL" on my old computer before,so I try to restore it all.
Then I find the miss folder "pycache" come out,I think I'm going to get close to the root of the problem.
But I failed.
I rebuild a same version gem5 on my new computer with the command"”scons build/Garnet_standalone/gem5.opt -j 4" under the root state.
Then I run the same script,I get the correct output.(I can see the average_packet_latency is increasing with the --injectionrate)
Although I get the desired output, I can't figure out why I get the wrong output.
------------------ 原始邮件 ------------------
发件人: "The gem5 Users mailing list" <gabriel.busnot@arteris.com>;
发送时间: 2022年9月20日(星期二) 晚上7:40
收件人: "gem5-users"<gem5-users@gem5.org>;
主题: [gem5-users] Re: 回复：Re: Different simulation results on different computers with the same configuration
Not sure to understand what you mean by “correct result".
Can you please provide us with:
gem5 version (commit SHA)
build command
run command
Can you please also double-check that you are using supported versions of python and gcc/clang. Also check that config.ini is the same in all cases.
Gabriel
Hello,
The following two command produce very different gem5 binaries
scons build/Garnet_standalone/gem5.opt
The above command will use the Garnet_standalone "coherence" protocol. I
use quotes around coherence because that protocol is essentially an empty
protocol with no coherence. It's meant for testing networks and nothing
else.
scons build/NULL/gem5.opt
This command will use the MI_example protocol. This is a completely
different coherence protocol than Garnet_standalone. See
https://gem5.googlesource.com/public/gem5/+/refs/heads/stable/build_opts/NULL
for how the protocol is defined in the default build options.
You can specify the exact protocol you want when you build gem5 by using
the scons parameter --protocol
Cheers,
Jason
On Tue, Sep 20, 2022 at 8:08 AM 2497597 2497597@qq.com wrote:
The correct result is below:
average_packet_latency = 15.510408
average_packet_latency = 15.528615
average_packet_latency = 15.682214
average_packet_latency = 15.695504
average_packet_latency = 15.769957
average_packet_latency = 15.821728
average_packet_latency = 15.912262
average_packet_latency = 16.051925
average_packet_latency = 16.167249
average_packet_latency = 16.319634
average_packet_latency = 16.479105
average_packet_latency = 16.725313
average_packet_latency = 17.055812
average_packet_latency = 17.588959
average_packet_latency = 18.500431
average_packet_latency = 21.669417
average_packet_latency = 103.241365
average_packet_latency = 273.002675
average_packet_latency = 430.695013
average_packet_latency = 596.634683
average_packet_latency = 732.220679
average_packet_latency = 854.214438
average_packet_latency = 969.032975
average_packet_latency = 1087.468352
average_packet_latency = 1207.588344
1.gem5 version is v21.2.1.0
2.build command is ”scons build/NULL/gem5.opt -j 4"
3.run command is below and the "--injection-rate" is increasing with
step=0.02
Command to Run:
./build/NULL/gem5.opt
configs/example/garnet_synth_traffic.py
--network=garnet2.0
--num-cpus=64
--num-dirs=64
--topology=Mesh_XY
--mesh-rows=8
--sim-cycles=10000
--inj-vnet=0
--injectionrate=0.02
--synthetic=uniform_random
I find some interesting phenomenons.
I think I figured out where the problem might be.
It might be the permission error and the build order.
I built "X86","ARM","NULL" on my old computer before,so I try to restore
it all.
Then I find the miss folder "pycache" come out,I think I'm going to
get close to the root of the problem.
But I failed.
I rebuild a same version gem5 on my new computer with the command"”scons
build/Garnet_standalone/gem5.opt -j 4" under the root state.
Then I run the same script,I get the correct output.(I can see the
average_packet_latency is increasing with the --injectionrate)
Although I get the desired output, I can't figure out why I get the wrong
output.
------------------ 原始邮件 ------------------
发件人: "The gem5 Users mailing list" gabriel.busnot@arteris.com;
发送时间: 2022年9月20日(星期二) 晚上7:40
收件人: "gem5-users"gem5-users@gem5.org;
主题: [gem5-users] Re: 回复：Re: Different simulation results on different
computers with the same configuration
Not sure to understand what you mean by “correct result".
Can you please provide us with:
1.
gem5 version (commit SHA)
2.
build command
3.
run command
Can you please also double-check that you are using supported versions of
python and gcc/clang. Also check that config.ini is the same in all cases.
Gabriel
gem5-users mailing list -- gem5-users@gem5.org
To unsubscribe send an email to gem5-users-leave@gem5.org
Thanks!!!!
I believe this is the reason, so I can't wait to test it out.
I rebuild the gem5 by using command "scons build/NULL/gem5.opt PROTOCOL=Garnet_standalone -j 4" and run the same script as before.
As expected, I got the correct output!
I'm so happy to have your help, I'll take this mistake to heart.
------------------ 原始邮件 ------------------
发件人: "The gem5 Users mailing list" <jason@lowepower.com>;
发送时间: 2022年9月20日(星期二) 晚上11:40
收件人: "The gem5 Users mailing list"<gem5-users@gem5.org>;
抄送: "Eliot ,Moss"<moss@cs.umass.edu>;
主题: [gem5-users] Re: 回复：Re: 回复：Re: Different simulation results on different computers with the same configuration
Hello,
The following two command produce very different gem5 binaries
scons build/Garnet_standalone/gem5.opt
The above command will use the Garnet_standalone "coherence" protocol. I use quotes around coherence because that protocol is essentially an empty protocol with no coherence. It's meant for testing networks and nothing else.
scons build/NULL/gem5.opt
This command will use the MI_example protocol. This is a completely different coherence protocol than Garnet_standalone. See https://gem5.googlesource.com/public/gem5/+/refs/heads/stable/build_opts/NULL for how the protocol is defined in the default build options.
You can specify the exact protocol you want when you build gem5 by using the scons parameter --protocol
Cheers,
Jason
On Tue, Sep 20, 2022 at 8:08 AM 2497597 <2497597@qq.com> wrote:
The correct result is below:
average_packet_latency = 15.510408
average_packet_latency = 15.528615
average_packet_latency = 15.682214
average_packet_latency = 15.695504
average_packet_latency = 15.769957
average_packet_latency = 15.821728
average_packet_latency = 15.912262
average_packet_latency = 16.051925
average_packet_latency = 16.167249
average_packet_latency = 16.319634
average_packet_latency = 16.479105
average_packet_latency = 16.725313
average_packet_latency = 17.055812
average_packet_latency = 17.588959
average_packet_latency = 18.500431
average_packet_latency = 21.669417
average_packet_latency = 103.241365
average_packet_latency = 273.002675
average_packet_latency = 430.695013
average_packet_latency = 596.634683
average_packet_latency = 732.220679
average_packet_latency = 854.214438
average_packet_latency = 969.032975
average_packet_latency = 1087.468352
average_packet_latency = 1207.588344
1.gem5 version is v21.2.1.0
2.build command is ”scons build/NULL/gem5.opt -j 4"
3.run command is below and the "--injection-rate" is increasing with step=0.02
Command to Run:
./build/NULL/gem5.opt
configs/example/garnet_synth_traffic.py \
--network=garnet2.0 \
--num-cpus=64 \
--num-dirs=64 \
--topology=Mesh_XY \
--mesh-rows=8 \
--sim-cycles=10000 \
--inj-vnet=0 \
--injectionrate=0.02 \
--synthetic=uniform_random
I find some interesting phenomenons.
I think I figured out where the problem might be.
It might be the permission error and the build order.
I built "X86","ARM","NULL" on my old computer before,so I try to restore it all.
Then I find the miss folder "pycache" come out,I think I'm going to get close to the root of the problem.
But I failed.
I rebuild a same version gem5 on my new computer with the command"”scons build/Garnet_standalone/gem5.opt -j 4" under the root state.
Then I run the same script,I get the correct output.(I can see the average_packet_latency is increasing with the --injectionrate)
Although I get the desired output, I can't figure out why I get the wrong output.
------------------ 原始邮件 ------------------
发件人: "The gem5 Users mailing list" <gabriel.busnot@arteris.com>;
发送时间: 2022年9月20日(星期二) 晚上7:40
收件人: "gem5-users"<gem5-users@gem5.org>;
主题: [gem5-users] Re: 回复：Re: Different simulation results on different computers with the same configuration
Not sure to understand what you mean by “correct result".
Can you please provide us with:
gem5 version (commit SHA)
build command
run command
Can you please also double-check that you are using supported versions of python and gcc/clang. Also check that config.ini is the same in all cases.
Gabriel
gem5-users mailing list -- gem5-users@gem5.org
To unsubscribe send an email to gem5-users-leave@gem5.org