08-30-2010
Quote:
Originally Posted by
vanguard
So the i7 in my desktop should, in theory, be ok with a load under 8. It has 4 cores with hyper threading.
Hyperthreading isn't multitasking. The effect, in an OS equipped to handle hyperthreading, is about a 30% performance improvement over a non-hyperthreading core. That it appears as two "virtual" cores is a side-effect, you don't really have eight cores.
So, four cores, four simultaneous processes.
Quote:
Are you saying the x3110 only runs 2 processes at a time?
Two cores, two simultaneous processes.
These CPU's could be fine with a great deal more processes than that depending on speed requirements etc. They will just have to start time-sharing in order to run them all.
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CORE(5) BSD File Formats Manual CORE(5)
NAME
core -- memory image file format
SYNOPSIS
#include <sys/param.h>
DESCRIPTION
A small number of signals which cause abnormal termination of a process also cause a record of the process's in-core state to be written to
disk for later examination by one of the available debuggers. (See sigaction(2).) This memory image is written to a file named by default
core.pid, where pid is the process ID of the process, in the /cores directory, provided the terminated process had write permission in the
directory, and the directory existed.
The maximum size of a core file is limited by setrlimit(2). Files which would be larger than the limit are not created.
The core file consists of the Mach-O(5) header as described in the <mach-o/loader.h> file. The remainder of the core file consists of vari-
ous sections described in the Mach-O(5) header.
NOTE
Core dumps are disabled by default under Darwin/Mac OS X. To re-enable core dumps, a privileged user must do one of the following
* Edit /etc/launchd.conf or $HOME/.launchd.conf and add a line specifying the limit limit core unlimited
* A privileged user can also enable cores with launchctl limit core unlimited
* A privileged user can also enable core files by using ulimit(1) or limit(1) depending upon the shell.
SEE ALSO
gdb(1), setrlimit(2), sigaction(2), Mach-O(5), launchd.conf(5), launchd.plist(5), sysctl(8)
HISTORY
A core file format appeared in Version 6 AT&T UNIX.
BSD
June 26, 2008 BSD