Re: [Gems-users] transactional memory and Opal

[Jayaram Bobba <bobba@xxxxxxxxxxx>]

The TM implementation in GEMS does not work in the presence of Opal.
It only works in the SIMICS+ruby mode.

Jayaram


huitzu shih wrote:
> I used GEMS-2.1 and simics-2.2.19 to run deque-tm.
> But when I use ruby+opal module to execute it , I miss the 
> transcational memory information. All "Transactional Memory Stats" are 
> zero. (Show below)
> I use opal to get the WATTCH power information. In other words, I want 
> to execute the transactional memory program and get WATTCH power 
> information. 
> Are there any solutions?
> Please help me! Thanks
>  
> Transactional Memory Stats:
> ------- xact --------
> xact_size_dist: [binsize: 1 max: 0 count: 0 average: NaN |standard 
> deviation: NaN | 0 ]
> xact_instr_count: [binsize: 1 max: 0 count: 0 average: NaN |standard 
> deviation: NaN | 0 ]
> xact_time_dist: [binsize: 1 max: 0 count: 0 average: NaN |standard 
> deviation: NaN | 0 ]
> xact_log_size_dist: [binsize: 1 max: 0 count: 0 average: NaN |standard 
> deviation: NaN | 0 ]
> xact_read_set_size_dist: [binsize: 1 max: 0 count: 0 average: NaN 
> |standard deviation: NaN | 0 ]
> xact_write_set_size_dist: [binsize: 1 max: 0 count: 0 average: NaN 
> |standard deviation: NaN | 0 ]
> xact_overflow_read_lines_dist: [binsize: 1 max: 0 count: 0 average: 
> NaN |standard deviation: NaN | 0 ]
> xact_overflow_write_lines_dist: [binsize: 1 max: 0 count: 0 average: 
> NaN |standard deviation: NaN | 0 ]
> xact_overflow_read_set_size_dist: [binsize: 1 max: 0 count: 0 average: 
> NaN |standard deviation: NaN | 0 ]
> xact_overflow_write_set_size_dist: [binsize: 1 max: 0 count: 0 
> average: NaN |standard deviation: NaN | 0 ]
> xact_miss_load_dist: [binsize: 1 max: 0 count: 0 average: NaN 
> |standard deviation: NaN | 0 ]
> xact_miss_store_dist: [binsize: 1 max: 0 count: 0 average: NaN 
> |standard deviation: NaN | 0 ]
> xact_nacked: 0
> xact_retries:        [binsize: 1 max: 0 count: 0 average: NaN 
> |standard deviation: NaN | 0 ]
> xact_abort_delays: [binsize: 1 max: 0 count: 0 average: NaN |standard 
> deviation: NaN | 0 ]
> xact_aborts:        0
> xact_writebacks:    0
> xact_extra_wbs:    0
> xact_handler_startup_delay: -1
> xact_handler_per_block_delay: -1
> xact_inferred_aborts: 0
>  
>
>  
> 2008/4/22 Luke Yen <lyen@xxxxxxxxxxx <mailto:lyen@xxxxxxxxxxx>>
>
>       The version of Opal for the GEMs release does not support running TM
>     programs.
>       However with alot of non-trivial work it can be made to run TM
>     programs.
>     Most of the complexity comes in how to track transactional
>     loads/stores
>     for correct conflict detection, and how to handle stalls & aborts.
>
>       Luke
>
>     On Mon, 21 Apr 2008, cge@xxxxxxxx <mailto:cge@xxxxxxxx> wrote:
>
>     > Hi,
>     > Is there anyway to run transactional momory workloads in
>     > MESI_CMP_filter_directory with Opal ?
>     >
>     > I know this was not supported before due to the conflicts
>     between magic
>     > calls (such as BEGIN_TRANSACTION and COMMIT_TRANSACTION)and Opal.
>     >
>     > Thanks,
>     > Ken
>     >
>     >
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