12-12-2008
finding no of core in processor
Hi,
what is command to find out no of core per procssor?
Regards,
Manoj
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Hi,
I want to know how to find out no of cores in linux.
I have given the command more /proc/cpuinfo
NOw I want to know what is diffrence between cpu cores and core id?
How to find out exact no of cores?
Regards,
Manoj (1 Reply)
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LEARN ABOUT OPENSOLARIS
openssl_ia32cap
OPENSSL_ia32cap(3openssl) OpenSSL OPENSSL_ia32cap(3openssl)
NAME
OPENSSL_ia32cap - finding the IA-32 processor capabilities
SYNOPSIS
unsigned long *OPENSSL_ia32cap_loc(void);
#define OPENSSL_ia32cap (*(OPENSSL_ia32cap_loc()))
DESCRIPTION
Value returned by OPENSSL_ia32cap_loc() is address of a variable containing IA-32 processor capabilities bit vector as it appears in EDX
register after executing CPUID instruction with EAX=1 input value (see Intel Application Note #241618). Naturally it's meaningful on
IA-32[E] platforms only. The variable is normally set up automatically upon toolkit initialization, but can be manipulated afterwards to
modify crypto library behaviour. For the moment of this writing three bits are significant, namely bit #28 denoting Hyperthreading, which
is used to distinguish Intel P4 core, bit #26 denoting SSE2 support, and bit #4 denoting presence of Time-Stamp Counter. Clearing bit #26
at run-time for example disables high-performance SSE2 code present in the crypto library. You might have to do this if target OpenSSL
application is executed on SSE2 capable CPU, but under control of OS which does not support SSE2 extentions. Even though you can manipulate
the value programmatically, you most likely will find it more appropriate to set up an environment variable with the same name prior start-
ing target application, e.g. 'env OPENSSL_ia32cap=0x10 apps/openssl', to achieve same effect without modifying the application source code.
Alternatively you can reconfigure the toolkit with no-sse2 option and recompile.
OpenSSL-0.9.8 Oct 11 2005 OPENSSL_ia32cap(3openssl)