Red Hat LINUX VIRTUAL SERVER - FOR ENTERPRISE LINUX 5.2 REV 05-2008 Uživatelský manuál stáhnout pdf (Strana 26)

GNU Compiler

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General optimizer improvements

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New data flow analyzer framework (GCC 4.3)

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System z machine support

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System z10 processor support (> GCC 4.3)

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Exploit instruction new to z10

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Selected via -march=z10 / -mtune=z10

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Decimal floating point support (GCC 4.3)

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For newer machines with hardware DFP support

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64 bit registers for 31 bit applications (> GCC 4.3)

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Work in progress

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System z compiler performance

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Overall enhancement > 10% on z9 with industry-standard integer benchmark

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8% comparing GCC 3.4 and GCC 4.1

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5.9% comparing GCC 4.1 and GCC 4.2

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0.5% comparing GCC 4.2 and GCC 4.3

3.0 3.1/

3.2

3.3 3.4 4.0 4.1 4.2 4.3

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120

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160

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GCC Version

Patc hes

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 32

What's New in 1
Linux on System z 1
(Kernel 2.6 based) 3
Supported Linux Distributions 4
Kernel news – Common code 6
4.300 lines added 8
1.800 lines removed 8
1.500 lines modified 8
Linux kernel – 9
System z contributions 9
Linux Kernel Directions 25
GNU Compiler 26
Other packages 29
Useful Web links 30
Thank you for your interest ! 31
Disclaimer 32

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