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Qaagi - Book of Why

Causes

Effects

the load instruction ... likelyto causea cache miss

a memory access requestresultingfrom a cache miss

every memory accesswill causea cache miss

the ld instruction ... likelyto createa cache miss

an application ’s most significant memory access patternscausingcache misses

load instructions that are likelyto causea cache - miss

an identification of a memory access operationcauseda cache miss

the ldx ( load ) instruction ( 1causesa cache miss

each read instructionwill causea cache miss

The stalled instructionmay resultfrom a cache miss

a checkpoint ... an instructioncausesa cache miss

execution of instruction(passive) caused bya cache miss

a second instructioncausesa cache miss

an example of a program including an instruction that is likelyto causecache misses

Only one issue cycle ... a load instructionhas causeda cache miss

column ... more likelyto causecache misses

extremely likelyto causea cache miss

the references ... most likelywill ... causea cache miss

an instruction cache with a first instruction addresscausesa cache miss

a read request ( i.e. a load instruction ) issued from the CPU 101causesa cache miss

execution of a memory access operation for a particular threadcausesa cache miss

a load or store instruction of a processor pipeline(passive) caused bya cache miss

a load request(passive) caused bya cache miss

a thread - switch trigger event , such as a load instructionhas triggereda cache miss

a read request for recently written datawill createa " cache miss

a fetch access of a given instruction(passive) caused bya cache miss

response to the instruction being executed at time T2causinga cache miss

Allocating memory ... more likelyto causea cache miss

any failed memory access requests ( memory access requeststriggera cache miss

program instructions that are likelyto causecache misses

branch instruction 370causesa cache miss

inserted into the instruction streamto preventa cache miss

The instruction in Step 2causesa cache miss

the preloading instruction 920Acan causea cache miss

at least one instruction(passive) caused bycache misses

the command ... the respective instructioncausesa cache miss

e.g. , the same instructioncausinga cache miss

execution of a particular instruction(passive) caused bya cache miss

an instruction executed at a first time(passive) caused bya cache miss

a load instruction by said processor to load a value from said inaccessible source virtual address(passive) triggered bycache miss

the significant latency(passive) caused bythe significant latency

unpredictable memory latency(passive) caused byunpredictable memory latency

data access latency(passive) caused bydata access latency

latency and timing variations(passive) caused bylatency and timing variations

delays ( stallsare ... causingdelays ( stalls

any time delays(passive) caused byany time delays

pipeline delays(passive) caused bypipeline delays

execution delayscan causeexecution delays

significant delayscausessignificant delays

architecture minimizes delays(passive) caused byarchitecture minimizes delays

increase in latency ( extra proxy processingcan causeincrease in latency ( extra proxy processing

delays as the program or applicationcan causedelays as the program or application

memory - related delays(passive) caused bymemory - related delays

A similar delay(passive) can be caused byA similar delay

to a high latency due to read from slower machine ( disk instead of memoryleadsto a high latency due to read from slower machine ( disk instead of memory

the pipelines tostall for several cycles , and the total amount of memory latency will be severe if the data is not available most of the timecan causethe pipelines tostall for several cycles , and the total amount of memory latency will be severe if the data is not available most of the time

the processor to stall , wasting timecausethe processor to stall , wasting time

in ( 100 + 4 ) = 104 cycles latency for every 4 access to matrix a.resultingin ( 100 + 4 ) = 104 cycles latency for every 4 access to matrix a.

a first thread to stallcausesa first thread to stall

a stall in a processor pipelinecan causea stall in a processor pipeline

a wait time(passive) caused bya wait time

in a main memory accessresultingin a main memory access

a Delay and store it in the cachecreatea Delay and store it in the cache

in over a hundred cycle delaywill resultin over a hundred cycle delay

the stall event(passive) is caused bythe stall event

in an expensive and time - consuming effort to retrieve the item of information from the main memory of the systemresultsin an expensive and time - consuming effort to retrieve the item of information from the main memory of the system

In uniprocessors : bus traffic and memory - access time(passive) heavily influenced byIn uniprocessors : bus traffic and memory - access time

from the early eviction of data that may be reused by clients within a systemresultingfrom the early eviction of data that may be reused by clients within a system

the processor coremay causethe processor core

the processor to idlecausingthe processor to idle

Completion stall(passive) caused byCompletion stall

a stall rightwill createa stall right

from a request by restricted client 202(1resultedfrom a request by restricted client 202(1

in a disk accessresultingin a disk access

in a data transfer operation that can include some delaycan resultin a data transfer operation that can include some delay

the processor to stall for hundreds of cycles to hit main memeorycausesthe processor to stall for hundreds of cycles to hit main memeory

huge performance overhead if it occurs oftenmight causehuge performance overhead if it occurs often

the number of data fetches(passive) caused bythe number of data fetches

a line to be replacedmay causea line to be replaced

delays in execution of the instruction since the cache is typically first filled with the instructioncausesdelays in execution of the instruction since the cache is typically first filled with the instruction

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