Webcode2: ILP = 3 i.e. can execute at the same time code1: r1 ←r2 + 1 r3 ←r1 / 17 r4 ←r0 - r3 code2: r1 ←r2 + 1 r3 ←r9 / 17 r4 ←r0 - r10 CS211 14 Inter-instruction Dependences Data dependence r 3 ←r 1 op r 2 Read-after-Write r 5 ←r 3 op r 4 (RAW) Anti-dependence r 3 ← r 1 op r 2 Write-after-Read r 1 ← r 4 op r 5 (WAR) Output ... Web= [ 1 + ( 6 ) x 400/4 ] x 5 c.c. = 3005 c.c. Question # 1.2 Calculate how many clock cycles will take execution of this segment on the simple pipeline without forwarding or bypassing when result of the branch instruction (new PC content) is available after WB stage. Show timing of one loop cycle in Figure 1.1: Instruction
State Gas Pipelines - Breaking It Down: Understanding the …
WebInst. 2 Inst. 3 Inst. 3 Inst. 3 Inst. 4 Inst. 5 Inst. 4 Clock 3 Clock 4 Clock 5 Inst. 1 Inst. 2 Inst. 1 Basic 5 Stage PipelineBasic 5 Stage Pipeline • Same structure as single cycle but now … Web•As we try to deepen pipeline, overhead of loading registers becomes more significant •Percentage of clock cycle spent loading register: • 1-stage pipeline: 6.25% • 3-stage pipeline: 16.67% • 6-stage pipeline: 28.57% •High speeds of modern processor designs obtained through very deep pipelining Clock Delay = 420 ps, Throughput = 14.29 GIPS … blackberry rim 9900
Concept of Pipelining Computer Architecture Tutorial …
http://users.ece.northwestern.edu/~kcoloma/ece361/lectures/Lec12-pipeline.pdf Web1 pipeline.1 361 Computer Architecture Lecture 12: Designing a Pipeline Processor pipeline.2 Overview of a Multiple Cycle Implementation °The root of the single cycle processor’s problems: •The cycle time has to be long enough for the slowest instruction °Solution: •Break the instruction into smaller steps •Execute each step (instead of the … Webhazard in the 5-stage pipeline is 5% (the probability that an instruction is a lw instruction that loads into a register R and that this lw instruction is immediately followed by an instruction which reads from R). Compute the CPI of the 4-stage pipeline. CPI5-stage = 2.05 CPI4-stage = 2.05 – 0.05 * 1 = 2 blackberry ringtones for iphone