Exploring branch predictability limits with the MTAGE+SC predictor * - Archive ouverte HAL Access content directly
Conference Papers Year : 2016

Exploring branch predictability limits with the MTAGE+SC predictor *

Abstract

In the previous championship CBP-4, the winner of the unlimited storage track [5], poTAGE-SC was combining several TAGE based predictors using different forms of histories (local, global, and frequency), a COLT inspired [3] prediction combiner and a statistical corrector (SC) predictor [8, 10] fed with various forms of branch histories. With MTAGE-SC, we improve this predictor in two ways. First through incorporating new forms of branch histories, adding a new TAGE component and incorporating other forms of histories in the statistical corrector predictor. Second in conveying more information from the TAGE predictors stage to the statistical corrector and to the final prediction computation stage. On the CBP-4 traces, the proposed MTAGE-SC predic-tor achieves 1.600 mispredictions per thousand instructions (MPKI), while the winner of CBP-4 was achieving 1.691 MPKI. On CBP-5 train traces, the MTAGE-SC pre-dictor achieves 2.575 MPKI, 4.7% lower than the winner of CBP-4 (2.717).
Fichier principal
Vignette du fichier
MutiTage-SC.pdf (312.6 Ko) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-01354251 , version 1 (18-08-2016)

Identifiers

  • HAL Id : hal-01354251 , version 1

Cite

André Seznec. Exploring branch predictability limits with the MTAGE+SC predictor *. 5th JILP Workshop on Computer Architecture Competitions (JWAC-5): Championship Branch Prediction (CBP-5), Jun 2016, Seoul, South Korea. pp.4. ⟨hal-01354251⟩
443 View
448 Download

Share

Gmail Facebook Twitter LinkedIn More