The "overall latency" is the sum of all the relevant latencies that is
used to calculate average latency, e.g.,
overall miss latency
ave. miss latency = --------------------
number of misses
So if you have multiple misses being handled in parallel then it's easy
for this to be larger than the total time.
Steve
Zhang zhibin wrote:
> Hiļ¼Steve
> I configure m5 to dump statistic result every 1 million cycles when in
> simulation, which the config.ini is like this:
>
> [stats]
> descriptions=true
> dump_cycle=0
> dump_period=1000000
> dump_reset=true
> ignore_events=
> mysql_db=
> mysql_host=
> mysql_password=
> mysql_user=
> project_name=test
> simulation_name=test
> simulation_sample=0
> text_compat=true
> text_file=m5stats.txt
>
> But it is strange that some of latency statistic results is larger than
> dump_period, like dcache I got
>
> cpu.dcache.overall_miss_latency 12839992 # number of
> overall miss cycles
> cpu.dcache.overall_miss_rate 0.182594 # miss rate for
> overall accesses
> cpu.dcache.overall_misses 134820 # number of
> overall misses
> cpu.dcache.overall_mshr_hits 105250 # number of
> overall MSHR hits
> cpu.dcache.overall_mshr_miss_latency 1757871 # number of
> overall MSHR miss cycles
>
> cpu.numCycles 1000000 # number of cpu
> cycles simulated
>
>
> As you can see that cpu.dcache.overall_miss_latency is the number of
> overall miss cycles, why it is lager than the total cycles simulated ?
> Is there anything wrong ?
> thanks
>
>
>
>
>
> -------------------------------------------------------
> This SF.net email is sponsored by: Splunk Inc. Do you grep through log
> files
> for problems? Stop! Download the new AJAX search engine that makes
> searching your log files as easy as surfing the web. DOWNLOAD SPLUNK!
> http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click
> _______________________________________________
> m5sim-users mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/m5sim-users
-------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc. Do you grep through log files
for problems? Stop! Download the new AJAX search engine that makes
searching your log files as easy as surfing the web. DOWNLOAD SPLUNK!
http://ads.osdn.com/?ad_idv37&alloc_id865&op=click
_______________________________________________
m5sim-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/m5sim-users
