Energy savings in simultaneous multi-threaded processors through dynamic resizing of datapath resources

Gürhan KÜÇÜK; Mine MESTA

Makale detayları

Energy savings in simultaneous multi-threaded processors through dynamic resizing of datapath resources

Yazarlar:

Gürhan KÜÇÜK | Mine MESTA

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Electrical Engineering and Computer Science 2012 Vol.20 Issue 1, pp.125-139

Belge Tipi:

Makale

Yayın Tarihi:

12/2011

Belge Dili:

Türkçe

Document ID (Org No.):

2000743640

Sıklık:

İki Aylık

eISSN:

1303-6203

pISSN:

1300-0632

Özet:

 

Nowadays, all the designers of systems from high-performance  servers to battery-operated handheld devices aim for reliability,  high-performance and longevity.  Central within these aims the issue  of processor power consumption is becoming increasingly important.  In  this study, we aim to adapt our already-proven method for  single-threaded superscalar processors to simultaneous multi-threaded  (SMT) processors for energy savings.  The original method focused on  resizing datapath resources according to the demands of running  applications.  To achieve this, the targeted resources are physically  divided into multiple partitions, and turned on and off according to  the needs of the applications.  Since, the energy consumption of the  turned-off datapath resources is quite low, as a result, it becomes  possible to have great amount of energy savings within a processor.  However, special care must be taken when there are multiple threads  racing against each other to gain access to shared datapath resources.  As a result, our proposed microarchitectural technique achieves 0.5%  Instructions Per Cycle (IPC) and 3.2% Total number of instructions  Per Cycle (TPC) improvement, while it turns off 45% of the Reorder  Buffer (ROB), 59% of the Load-Store Queue (LSQ), 43% of the Issue  Queue (IQ), 30% of the integer Physical Register Files (PRF) and,  finally, 48% of the floating PRF, on the average across all simulated  benchmarks.  According to our estimates, the total processor power is  reduced by 12%, on the average.

 

Nowadays, all the designers of systems from high-performance  servers to battery-operated handheld devices aim for reliability,  high-performance and longevity.  Central within these aims the issue  of processor power consumption is becoming increasingly important.  In  this study, we aim to adapt our already-proven method for  single-threaded superscalar processors to simultaneous multi-threaded  (SMT) processors for energy savings.  The original method focused on  resizing datapath resources according to the demands of running  applications.  To achieve this, the targeted resources are physically  divided into multiple partitions, and turned on and off according to  the needs of the applications.  Since, the energy consumption of the  turned-off datapath resources is quite low, as a result, it becomes  possible to have great amount of energy savings within a processor.  However, special care must be taken when there are multiple threads  racing against each other to gain access to shared datapath resources.  As a result, our proposed microarchitectural technique achieves 0.5%  Instructions Per Cycle (IPC) and 3.2% Total number of instructions  Per Cycle (TPC) improvement, while it turns off 45% of the Reorder  Buffer (ROB), 59% of the Load-Store Queue (LSQ), 43% of the Issue  Queue (IQ), 30% of the integer Physical Register Files (PRF) and,  finally, 48% of the floating PRF, on the average across all simulated  benchmarks.  According to our estimates, the total processor power is  reduced by 12%, on the average.

Makale detayları

Energy savings in simultaneous multi-threaded processors through dynamic resizing of datapath resources

Yazarlar: Gürhan KÜÇÜK | Mine MESTA

Yayıncı: TUBITAK

Dergi: Turkish Journal of Electrical Engineering and Computer Science 2012 Vol.20 Issue 1, pp.125-139

Belge Tipi: Makale

Yayın Tarihi: 12/2011

Belge Dili: Türkçe

Document ID (Org No.): 2000743640

Sıklık: İki Aylık

eISSN: 1303-6203

pISSN: 1300-0632

Sayı

Yazarlar:

Gürhan KÜÇÜK | Mine MESTA

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Electrical Engineering and Computer Science 2012 Vol.20 Issue 1, pp.125-139

Belge Tipi:

Makale

Yayın Tarihi:

12/2011

Belge Dili:

Türkçe

Document ID (Org No.):

2000743640

Sıklık:

İki Aylık

eISSN:

1303-6203

pISSN:

1300-0632