Re: [Gems-users] question on time in eventqueue

[lya755@xxxxxxxxxxxxxxxxxxxx]

I see. So what if I want to count the number of load/stores as the number of 
instructions? Also, when used as a module for Simics, how does Ruby compute 
instructions_executed? Is that the real number of instructions?

Thanks very much,
Lei
----- Original Message ----- 
From: "Mike Marty" <mikem@xxxxxxxxxxx>
To: <lya755@xxxxxxxxxxxxxxxxxxxx>
Cc: "Gems Users" <gems-users@xxxxxxxxxxx>
Sent: Tuesday, January 30, 2007 5:58 PM
Subject: Re: [Gems-users] question on time in eventqueue


> The tester doesn't execute instructions.  It only generates loads/stores
> to the memory system.
> 
> --Mike
> 
> 
>> Thanks Mike! I checked the Profiler.C code and found
>> that "instruction_executed" is obtained by the following:
>>
>>  for(int i=0; i < RubyConfig::numberOfProcessors(); i++) {
>>     perProcInstructionCount[i] = g_system_ptr->getDriver()-
>getInstructionCount
>> (i) - m_instructions_executed_at_start[i] + 1;
>>     // The +1 allows us to avoid division by zero
>>   }
>>
>> I then looked into getInstructionCount, which is defined in Driver.h as:
>>
>> virtual integer_t getInstructionCount(int procID) const { return 1; }
>>
>> That being said, the instruction count for each processor is always 1. I used
>> the Ruby Tester and verified MSI_MOSI_CMP_directory protocol; I found that
>> indeed instruction_executed is always 1 for each processor. The following is
>> the result from running a 4 processor simulation.
>>
>> instruction_executed: 4 [ 1 1 1 1 ]
>> cycles_per_instruction: 31300 [ 31300 31300 31300 31300 ]
>> misses_per_thousand_instructions: 40000 [ 38000 40000 40000 42000 ]
>>
>> I'm wondering if this is a bug in Ruby Tester or did I miss something? I do
>> need to know the exact number of instructions executed on each processor from
>> Ruby when I use the Ruby Tester. If "getInstructionCount" is not functioning
>> correctly, how should I fix it? Please advice!
>>
>> Thanks in advance for your help!
>>
>> Lei
>> ----- Original Message -----
>> From: "Mike Marty" <mikem@xxxxxxxxxxx>
>> To: "Lei Yang" <lya755@xxxxxxxxxxxxxxxxxxxx>
>> Cc: "Gems Users" <gems-users@xxxxxxxxxxx>
>> Sent: Friday, January 26, 2007 10:07 AM
>> Subject: Re: [Gems-users] question on time in eventqueue
>>
>>
>> > >
>> >> One other question is (may seem unrelated, sorry),  is there an easy way 
in
>> >> ruby to find out the instruction count of one processor?
>> >>
>> >
>> > See where Profiler.C outputs "instruction_executed".  There should be a
>> > per-processor count kept track in the Profiler
>> >
>> >

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