Sniper speed up

[Zung]

I am a newbie to Sniper.

I have an application that takes less than 3 seconds to complete on an Unbuntu 12 Linux box.

However it takes 227 minutes to complete under Sniper.

Is there a minimal configuration to get Sniper to run the fastest and producing consistent results?

Here is my current configuration:

#include base 

[perf_model/cache]

levels = 3

[perf_model/l1_icache]

writethrough = 0

[perf_model/l1_dcache]

writethrough = 0

[perf_model/l2_cache]

writethrough = 0

[perf_model/l3_cache]

cache_block_size = 64

dvfs_domain = global

prefetcher = none

shared_cores = 4

writethrough = 0

perf_model_type = parallel

writeback_time = 0

tags_access_time = 10

data_access_time = 30 # 35 cycles total according to membench, +L1+L2 tag times

replacement_policy = lru

address_hash = mask

associativity = 16

cache_size = 8192

[perf_model/core/oneipc]

latency_cutoff = 4 # Maximum latency which is assumed to be completely overlapped. L1-D hit latency should be a good value

[perf_model/dram]

# -1 means that we have a number of distributed DRAM controllers (4 in this case)

num_controllers = -1

controllers_interleaving = 4

Your help in this matter will be greatly appreciated.

Zung

[Wim Heirman]

Hi Zung,

Please see some discussion about this in an earlier thread on this mailing list: https://groups.google.com/d/msg/snipersim/cczjaQYBZFc/8uuuC7sEMZkJ

Keep in mind though that detailed simulation is always rather slow so don't expect any miracles. You can increase simulation speed, but that will reduce accuracy, which depending on your exact experiment may or may not be acceptable.

Regards,

Wim

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[Zung]

Thanks Wim, for your quick response.

I will do some more experimenting.

Zung