MESSAGE
| DATE | 2015-02-02 |
| FROM | Ruben Safir
|
| SUBJECT | Re: [LIU Comp Sci] DMA memory and CPU activity
|
From owner-learn-outgoing-at-mrbrklyn.com Mon Feb 2 00:46:39 2015
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Date: Mon, 02 Feb 2015 00:46:37 -0500
From: Ruben Safir
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To: Samir Iabbassen , learn-at-nylxs.com
Subject: Re: [LIU Comp Sci] DMA memory and CPU activity
References: <54CE533D.1040107-at-my.liu.edu>,<54CEBA72.4080104-at-panix.com> <2D3BE06BCB240643A778D84268606B30027E90840E-at-B-EXH-MBX2.liunet.edu>
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These books are aweful... look at this text book? You want to confuse
someone, this is how it is done
~~~~~~~~~~~~~~~~~~~~~
? The compute-server system provides an interface to which a client can
send a request to perform an action (for example, read data). In response,
the server executes the action and sends the results to the client. A server
running a database that responds to client requests for data is an example
of such a system.
?The file-server system provides a file-system interface where clients can
create, update, read, and delete files. An example of such a system is a web
server that delivers files to clients running web browsers.
~~~~~~~~~~~~~~~~~~~~
really now? Since when is a webserver a file server???
On 02/01/2015 09:40 PM, Samir Iabbassen wrote:
> -Core: Cores are what handle the arbitrary mathematical and logical workloads. They take high level machine instructions (x86, ARM, MIPS, etc...) and 'decode' them into physical circuit operations.
>
> -Processor / CPU: The combination of one or more 'cores' with supporting hardware and shared resources.
>
> and again hardware capabilities is one thing and OS usage of these capabilities are another thing.
> it's the OS responsibility to make the best usage of the hardware.
>
> ________________________________________
> From: Ruben Safir [mrbrklyn-at-panix.com]
> Sent: Sunday, February 01, 2015 6:44 PM
> To: learn-at-mrbrklyn.com; Samir Iabbassen; learn-at-nylxs.com; Mohammed Ghriga
> Subject: Re: [LIU Comp Sci] DMA memory and CPU activity
>
> This paragraph makes no sense... I'm sick of wordy textbooks that refuse
> to be exact in their descriptions. It is like trying to get a graduate
> degree through a readers digest correspondence programming:
>
>
> Quote:
>
> Aside from architectural considerations, such as cache, memory,
> and bus contention, these multicore CPUs appear to the operating system as
> N standard processors. This characteristic puts pressure on operating system
> designers?and application programmers?to make use of those processing
> cores.
> UNQUOTE
>
> what is N processors, each core or all the cores shared on a chip.
>
> Every dual core system I've seen runs different processes on different cores
>
> top
>
> top - 18:43:07 up 7 days, 3:37, 8 users, load average: 0.28, 0.24, 0.23
> Tasks: 132 total, 1 running, 131 sleeping, 0 stopped, 0 zombie
> %Cpu0 : 28.6/1.4
> 30[|||||||||||||||| ]
> %Cpu1 : 16.9/1.4
> 18[|||||||||| ]
> GiB Mem : 85.0/3.341
> [ ]
> GiB Swap: 3.3/1.953
> [ ]
>
> PID USER PR NI VIRT RES %CPU %MEM TIME+ S
> COMMAND
> 1 root 20 0 4.1m 0.5m 0.0 0.0 0:04.70 S
> init
> 702 root 20 0 17.5m 0.5m 0.0 0.0 0:00.36 S `-
> udevd
> 2132 root 20 0 8.7m 0.6m 0.0 0.0 0:00.00 S `-
> metalog
> 2133 root 20 0 8.7m 0.1m 0.0 0.0 0:00.00 S `-
> metalog
> 2156 root 20 0 259.4m 0.6m 0.0 0.0 0:00.14 S `-
> rsyslogd
> 2181 root 20 0 4.1m 0.4m 0.0 0.0 0:05.02 S `-
> acpid
> 2222 dbus 20 0 26.8m 1.4m 0.0 0.0 1:42.52 S `-
> dbus-daemon
> 2243 root 20 0 394.7m 1.1m 0.0 0.0 0:00.04 S `-
> console-kit-d+
> 2270 polkitd 20 0 356.6m 1.6m 0.0 0.0 0:00.07 S `-
> polkitd
> 2272 root 20 0 337.9m 2.7m 0.0 0.1 0:09.26 S `-
> NetworkManager
> 2342 root 20 0 14.4m 1.2m 0.0 0.0 0:00.10 S `-
> dhclient
> 2314 root 20 0 181.8m 3.6m 0.0 0.1 4:22.88 S `-
> wicd
> 2385 root 20 0 106.2m 3.0m 0.0 0.1 1:48.00 S `-
> wicd-moni+
> 2450 root 20 0 28.6m 1.0m 0.0 0.0 0:00.00 S `-
> lxdm-binary
> 2493 root 20 0 664.7m 267.2m 2.7 7.8 160:55.41 S `-
> Xorg.bin
> 3420 root 20 0 64.1m 0.9m 0.0 0.0 0:00.00 S `-
> lxdm-sess+
>
>
>
>
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