Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > comp.os.linux.advocacy > #108174
| From | Grant Edwards <invalid@invalid.invalid> |
|---|---|
| Newsgroups | comp.os.linux.advocacy, comp.os.linux.embedded, uk.comp.os.linux |
| Subject | Re: Why does Linux need memory management units and cache? |
| Date | 2012-05-20 14:42 +0000 |
| Organization | PANIX Public Access Internet and UNIX, NYC |
| Message-ID | <jpavsc$6q2$1@reader1.panix.com> (permalink) |
| References | <exMtr.167357$JQ.57569@fx02.am4> <a1q0nqFjl3U1@mid.individual.net> <2RQtr.477893$y11.316125@fx21.am4> |
Cross-posted to 3 groups.
On 2012-05-19, 7 <email_at_www_at_enemygadgets_dot_com@enemygadgets.com> wrote: > Niklas Holsti wrote: > >> On 12-05-19 15:40 , 7 wrote: >>> Why does Linux need memory management units and cache? >>> ------------------------------------------------------ >>> >>> Excuse us, this is bothering me much. >>> >>> Why does Linux need memory management units >> >> To implement virtual address spaces for processes. > > Virtual address space in a nut shell means program counter relative > operation. No, that's not what virtual address space means. >> Linux doesn't need cache, logically. But Linux systems usually need >> lots of memory, more than can be provided on chip, and access to >> off-chip memories is usually so slow that a cache makes the system >> much faster. > > So a cache could be implemented in software. Not really, no. > And if done properly with a fast program, it should run faster and > better than hardware Nope. > which would use up a lot more software in setting up and managing a > cache. -- Grant
Back to comp.os.linux.advocacy | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
Why does Linux need memory management units and cache? 7 <email_at_www_at_enemygadgets_dot_com@enemygadgets.com> - 2012-05-19 13:40 +0100
Why does Linux need memory management units and cache? Kulin <remailer@reece.net.au> - 2012-05-19 14:26 +0000
Re: Why does Linux need memory management units and cache? Niklas Holsti <niklas.holsti@tidorum.invalid> - 2012-05-19 19:40 +0300
Re: Why does Linux need memory management units and cache? 7 <email_at_www_at_enemygadgets_dot_com@enemygadgets.com> - 2012-05-19 18:34 +0100
Re: Why does Linux need memory management units and cache? Piergiorgio Sartor <piergiorgio.sartor.this.should.not.be.used@nexgo.REMOVETHIS.de> - 2012-05-19 19:44 +0200
Re: Why does Linux need memory management units and cache? 7 <email_at_www_at_enemygadgets_dot_com@enemygadgets.com> - 2012-05-19 19:57 +0100
Re: Why does Linux need memory management units and cache? Piergiorgio Sartor <piergiorgio.sartor.this.should.not.be.used@nexgo.REMOVETHIS.de> - 2012-05-19 21:17 +0200
Re: Why does Linux need memory management units and cache? 7 <email_at_www_at_enemygadgets_dot_com@enemygadgets.com> - 2012-05-20 22:53 +0100
Re: Why does Linux need memory management units and cache? Grant Edwards <invalid@invalid.invalid> - 2012-05-20 14:42 +0000
Re: Why does Linux need memory management units and cache? Hadron<hadronquark@gmail.com> - 2012-05-20 16:48 +0200
Re: Why does Linux need memory management units and cache? Nix <nix-razor-pit@esperi.org.uk> - 2012-05-20 22:19 +0100
Re: Why does Linux need memory management units and cache? 7 <email_at_www_at_enemygadgets_dot_com@enemygadgets.com> - 2012-05-20 22:55 +0100
Re: Why does Linux need memory management units and cache? Nix <nix-razor-pit@esperi.org.uk> - 2012-05-21 16:24 +0100
Re: Why does Linux need memory management units and cache? chrisv <chrisv@nospam.invalid> - 2012-05-21 10:44 -0500
Re: Why does Linux need memory management units and cache? GreyCloud <mist@cumulus.com> - 2012-05-21 10:51 -0600
Re: Why does Linux need memory management units and cache? GreyCloud <mist@cumulus.com> - 2012-05-21 10:51 -0600
Re: Why does Linux need memory management units and cache? Foster <frankfoster50@yahoo.com> - 2012-05-21 12:53 -0400
csiph-web