Prt t t - - PowerPoint PPT Presentation
tt t sts Prt t t ss t s
▼♦t✐✈❛t✐♦♥ ❲❛② ❍❛❧t✐♥❣ ❘❡s✉❧ts
∗◆♦r✇❡❣✐❛♥ ❯♥✐✈❡rs✐t② ♦❢ ❙❝✐❡♥❝❡ ❛♥❞ ❚❡❝❤♥♦❧♦❣② ∗∗❋❧♦r✐❞❛ ❙t❛t❡ ❯♥✐✈❡rs✐t②
▼♦t✐✈❛t✐♦♥ ❲❛② ❍❛❧t✐♥❣ ❘❡s✉❧ts
▼♦t✐✈❛t✐♦♥ ❲❛② ❍❛❧t✐♥❣ ❘❡s✉❧ts
▼♦t✐✈❛t✐♦♥ ❲❛② ❍❛❧t✐♥❣ ❘❡s✉❧ts
▼♦t✐✈❛t✐♦♥ ❲❛② ❍❛❧t✐♥❣ ❘❡s✉❧ts
Virtual Page Number (VPN) Line offset Set index
DTLB
VPN Physical Page Number (PPN) Data Array-0 Way Select-0 T ag Array-0
PPN set index line offset Data-0 Address: Data Array-1 Way Select-1 T ag Array-1
PPN set index line offset Data-1 Data Array-2 Way Select-2 T ag Array-2
PPN set index line offset Data-2 Data Array-3 Way Select-3 T ag Array-3
PPN set index line offset Data-3
Way Select Logic
Data Out
60% 30% 10%
Contribution to overall L1 load access energy
▼♦t✐✈❛t✐♦♥ ❲❛② ❍❛❧t✐♥❣ ❘❡s✉❧ts
adpcm basicmath bitcount blowfish crc dijkstra fft gsm ispell jpeg lame patricia pgp qsort rijndael rsynth sha stringsearch susan tiff average Execution time (normalized) 1 1.02 1.04 1.06 1.08 1.1 1.12 1.14 1.16
▼♦t✐✈❛t✐♦♥ ❲❛② ❍❛❧t✐♥❣ ❘❡s✉❧ts
▼♦t✐✈❛t✐♦♥ ❲❛② ❍❛❧t✐♥❣ ❘❡s✉❧ts
▼♦t✐✈❛t✐♦♥ ❲❛② ❍❛❧t✐♥❣ ❘❡s✉❧ts
15 31
32-bits 32-bits 31 16
31
▼♦t✐✈❛t✐♦♥ ❲❛② ❍❛❧t✐♥❣ ❘❡s✉❧ts
▼♦t✐✈❛t✐♦♥ ❲❛② ❍❛❧t✐♥❣ ❘❡s✉❧ts
▼♦t✐✈❛t✐♦♥ ❲❛② ❍❛❧t✐♥❣ ❘❡s✉❧ts
ADDR-GEN SRAM-ACCESS
DTLB TAG 0 TAG N-1 DATA 0
DATA N-1 A G U Base Address Displacement = = Format Data Way Select Forward Data Writeback Execution Units Register File Other Forwarding DATA-FORMATTING
HALT 0 HALT N-1
Base Address = =
▼♦t✐✈❛t✐♦♥ ❲❛② ❍❛❧t✐♥❣ ❘❡s✉❧ts
▼♦t✐✈❛t✐♦♥ ❲❛② ❍❛❧t✐♥❣ ❘❡s✉❧ts
▼♦t✐✈❛t✐♦♥ ❲❛② ❍❛❧t✐♥❣ ❘❡s✉❧ts
L1 DC Energy
0.7 0.75 0.8 0.85 STA 2 bits 3 bits 4 bits 5 bits 6 bits 7 bits 8 bits
▼♦t✐✈❛t✐♦♥ ❲❛② ❍❛❧t✐♥❣ ❘❡s✉❧ts
Zero ways One way Two ways Three ways Four ways
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.0047 0.0003 successful speculation unsuccessful speculation no speculation
▼♦t✐✈❛t✐♦♥ ❲❛② ❍❛❧t✐♥❣ ❘❡s✉❧ts
basicmath bitcount qsort susan jpeg lame tiff dijkstra patricia ispell rsynth stringsearch blowfish pgp rijndael sha adpcm crc32 fft gsm average
fraction of L1 DC data arrays accessed
0.05 0.1 0.15 0.2 0.25 0.3 Loads Stores
▼♦t✐✈❛t✐♦♥ ❲❛② ❍❛❧t✐♥❣ ❘❡s✉❧ts
basicmath bitcount qsort susan jpeg lame tiff dijkstra patricia ispell rsynth stringsearch blowfish pgp rijndael sha adpcm crc32 fft gsm average
L1 DC energy
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Miss−energy Store−energy Load−energy
▼♦t✐✈❛t✐♦♥ ❲❛② ❍❛❧t✐♥❣ ❘❡s✉❧ts
L1 DC Energy
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Baseline STA SHA Miss−energy Store−energy Load−energy
▼♦t✐✈❛t✐♦♥ ❲❛② ❍❛❧t✐♥❣ ❘❡s✉❧ts