Organizing pipeline in MIPS -


i'm unsure how following properties affect pipeline execution 5 stage mips design (if, id, ex, mem, wb). need clearing up.

  • only 1 memory port
  • no data fowarding.
  • branch stalls until end of * stage

does 1 memory port mean cannot fetch or write when read/write mem (i.e. mem stage on lw,sw can't enter if or mem)? no forwarding means instruction won't enter id stage until after or on wb stage previous instruction depends on? idk branch stall means

a common assumption can write in first half of cycle, , read in second half of cycle.

lets i1 first instruction , i2 second instruction, , i2 using register i1 modifying.

  • only 1 memory port. means cannot read or write memory @ same time in 2 different stages of pipelines. instance, if i1 @ mem stage, instruction cannot @ if stage @ same time, because both require memory access.

  • no data forwarding. data forwarding reflects fact @ end of ex stage i1, forward data id cycle of i2. consequently, no forwarding means pipeline has wait wb stage of i1 go id stage of i2. asumption, can go id stage @ same time wb stage of previous instruction, because wb write memory during first half of cycle, , id read memory during second half of cycle.

  • branch stalls until end of ex stage. common asumption, doesn't use branch prediction techniques. states instruction after branch has wait until end of ex stage start id stage. recall address of next instruction executed known @ ex stage of branch instruction.


-

Comments

Post a Comment

Popular posts from this blog

apache - PHP Soap issue while content length is larger -

we have developed soap based webservice post data third party webservice. accepts 4 params. in 1 of parameters accepts xml string no size limit restriction put in place. the webservice works fine in local environment running on php 5.2 , apache2. works content length long 10 mb. in staging server running nginx , php fpm.we have updated max post size , max upload filesize in php.ini , client_max_body param in nginx.conf allow upto 50 mb. but webservice client keeps on loading in staging environment. gives 502 timeout , gives soap error. can me understand issue here?
Read more

asynchronous - Python asyncio task got bad yield -

i confused how play around asyncio module in python 3.4. have searching api search engine, , want each search request run either parallel, or asynchronously, don't have wait 1 search finish start another. here high-level searching api build objects raw search results. search engine using kind of asyncio mechanism, won't bother that. # no asyncio module used here class search(object): ... self.s = some_search_engine() ... def searching(self, *args, **kwargs): ret = {} # raw searching according args , kwargs , build wrapped results ... return ret to try async requests, wrote following test case test how can interact stuff asyncio module. # here testing script @asyncio.coroutine def handle(f, *args, **kwargs): r = yield f(*args, **kwargs) return r s = search() loop = asyncio.get_event_loop() loop.run_until_complete(handle(s.searching, arg1, arg2, ...)) loop.close() by running pytest, return runtimeerror: task got bad yield : {results s...
Read more

javascript - Complete OpenIDConnect auth when requesting via Ajax -

the normal openidconnect server works like: you go a.com/secure-resource you 302 server your browser handles , sends identity server you login there it sends a.com via post you logged in on a.com , a.com/secure-resource on browser. however have scenario i'm trying solve need help. the user logged in on idserver the user logged in on a.com the user not logged in on b.com we need send ajax call web server b.com (from domain a.com ) b.com configured use openidconnect. but because request b.com via ajax, user cannot redirected idserver. (all in response 302 ) we can go ahead , handle 302 via ajax (i'm still not sure whether work, security-wise). but is there scenario in identityserver/openidconnect designed these situations? with identityserver in scenario setup server b.com use bearer token authentication, need use access token provided a.com in headers of ajax call $.ajax({ url: 'http://b.com', headers: { ...
Read more