AIX Version 4.3 Differences Guide

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one trillion terabytes. Other 64-bit architectures currently on the market mainly address a 2 64 bytes-wide virtual address space. Figure 5. Comparison of Address Translation in 32-Bit and 64-Bit Mode 3.1.4 AIX 64-Bit Design Criteria It is important to note that the 64-bit execution environment for application processes is an upward-compatible addition to AIX capability, not a replacement for the existing 32-bit function. The design IBM chose for 64-bit AIX allows existing 32-bit applications to run with 64-bit applications with no changes, thus protecting the investment users have made in their current applications. Users can take advantage of the features of 64-bit AIX when business needs dictate. AIX 64-bit support is intended to be run on 64-bit hardware systems, not simply any system containing a 64-bit PowerPC processor. A 64-bit hardware system is one that is based on the CHRP architecture and identifies 64-bit properties for the processor(s) and processor host bridges (PHBs) in configurations with memory addressing greater than 32 bits. 32 AIX Version 4.3 Differences Guide
For AIX, and the applications that run on AIX, the 64-bit PowerPCs have two important attributes. They are very fast when running as 32-bit processors, and they offer the opportunity of running a 64-bit environment. AIX 4.3 exploits these attributes separately. There are two different execution environments in AIX 4.3, the 32-bit execution environment and the 64-bit execution environment. These two environments are only available for 64-bit hardware. There is no 64-bit execution environment on 32-bit hardware. Generally, the AIX 4.3 kernel remains 32-bit, and only selected parts, such as the Virtual Memory Manager, are upgraded to be aware of the 64-bit address space. This means that the number of AIX kernels remains two (uniprocessor and multiprocessor). Although there were a number of choices regarding the basic data types of 64-bit processes, the choice that was made by the Aspen working group, formed by XOPEN, and a consortium of hardware vendors is called LP64, short for Long-Pointer 64. This is commonly also called the 4/8/8 model, which stands for the Integer/Long/Pointer type sizes. The benefit of this configuration is that it provides 64-bit addressing with 8-byte pointers, large object support (8-byte longs), and backward compatibility (4-byte integers). Other alternatives included an 8/8/8 solution, called ILP64, and the LLP64 that were not adapted. Obviously, the choice for AIX was LP64. 3.2 64-Bit Core Design As stated, the kernel of the AIX operating systems remains 32-bit. To allow 64-bit applications to run and use memory in the 64-bit address space, extensions to the kernel were introduced. This is discussed in Section 3.2.2, “System Calls” on page 37. A fundamental change was also introduced in the object module format that basically enables executables to overcome the size limit of 2 32 bytes. The subsection on XCOFF addresses these changes. The implications for device drivers of 64-bit and 32-bit devices in a 64-bit execution environment are explained in Section 3.2.4, “Device Drivers” on page 49. The loading of 64-bit modules is shared between kernel-space code and user-space code. The changes to the loader are discussed in 3.2.5, “Loader” on page 51. The Virtual Memory Manager is one of the key parts of the operating system when it comes to large address space and mapping of virtual to real memory. The consequences are summarized in the last part of this section. 3.2.1 Segment Register Mapping Since the 64-bit hardware uses 64-bit effective addresses while operating in 64-bit execution mode, keeping sixteen segment registers would have required increasing the size of segments proportionally to allow for the increased address space. This is less useful to applications than increasing the number of segments in a process' address space. Therefore, segmentation on the 64-bit hardware remains in units of 256 megabytes. In 64-bit execution mode, the sixteen segment registers used for 32-bit addressing are replaced with a segment table (analogous to the hardware page table) that contains up to 256 of the most 64-Bit Enablement 33
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AIX Version 4.3 Differences Guide R
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Take Note! Before using this inform
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Page 20 and 21: 51. List of Locales for Euro-Specif
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Page 26 and 27: The RS/6000 Enterprise Server Model
Page 28 and 29: • 1 MB of Level 2 (L2) cache. •
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Page 32 and 33: Table 3 is a comparison of various
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Page 38 and 39: work as on previous releases of AIX
Page 40 and 41: For AIX systems using AIX Version 3
Page 42 and 43: destructive overlay can be caught w
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Page 66 and 67: The addr struct is a library-side s
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Page 74 and 75: 3.2.4.2 Parameter Passing Examples
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Page 78 and 79: All of the following services are e
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The send_file call only supports th
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• The volume group's disks must b
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The relationship of factor -t, PP n
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The LVM in AIX 4.3.2 supports both
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MAX LVs: 256 FREE PPs: 81 (324 mega
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extended to 511 logical volumes and
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Note Although the chlvcopy command
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Figure 11. Default SMIT Menu SMIT p
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• NIM Install Manager Figure 13 s
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interface. Web-Based System Manager
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configuration change tasks in which
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Find Close Exit Opens a search dial
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Tree Changes the presentation of ic
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6.2.5.11 Status Line The status lin
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Note: The Web-Based System Manager
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A multiple selection is enabled for
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Figure 23. Example of Container Win
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6.4.3 Registered Applications This
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6.5 Daylight Savings Time Before AI
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keep the data and index files synch
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At the end of the install a volume
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cloned alt_inst_rootvg. The default
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6.8.4 Alternate Disk Installation E
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hdisk0 00006091aef8b687 rootvg hdis
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Support in SMIT was updated to allo
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6.10 System Resource Controller Sub
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6.11 TTY Remote Reboot (4.3.2) AIX
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exhaustively consumed. When a NIM o
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In summary, Table 25 shows the diff
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6.14 Error Message Templates (4.3.2
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6.17 System Backup Usability Enhanc
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Figure 31. Memory Exerciser Options
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146 AIX Version 4.3 Differences Gui
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7.1.2.1 Text Representation of Addr
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Anycast • Site-local - Valid only
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Error messages are identified by ha
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the Encapsulating Security Payload
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loaded as well if the administrator
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Figure 33. Typical Output from the
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7.1.8.3 route route was modified to
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specified by name or by number usin
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Figure 39. New SMIT TCP/IP Configur
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7.1.11 IPv6 and IPSec-Related RFCs
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Benefits are only gained when a cli
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of the routing applications are por
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There are new no options added: •
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7.9.1 Reducing the Number of TCP Pa
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• New macros to allow for simple
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thread will have a chance to handle
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unit of bit rate introduces an IPG
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• Debugging purposes. These trace
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Creating the Local Cache File Syste
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Parameter threshblocks=n maxfiles=n
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The automount command is called at
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7.14.2.5 Indirect Maps An indirect
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Event Error Used by the server to i
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8.2.3.1 Window Management The circu
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8.2.11 X Keyboard Extension Prior t
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y telling it to load a new configur
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8.2.12 X Record Extension The purpo
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down to a single round trip. It is
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ackwards compatibility; however, it
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The following is a list of AIX XIM
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mechanism to permit an IM Server to
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• XGetOMValues() • XDisplayOfOM
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locale.ldx /usr/lib/X11/locale/iso8
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objects, so the default installatio
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the same area just like real-world
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• Snap-back scrolling, a feature
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• Secondary transfer, also referr
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• Since the check mark sign is pa
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8.3.4.14 Scrolled Window and Scroll
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• New XmComboBox XmNpositionMode
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This application uses both the X Wi
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8.5.4 New OpenGL Extensions (4.3.2)
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The browser must be a forms-capable
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Figure 50. Documentation Search Ser
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If you have not run Netscape previo
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Previously, the man command had to
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Single-Byte Character Set Support (
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abandoning its standards-based inte
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• __mblen_std() - For all other c
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Locale method Unicode locales ISO88
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Unicode Locale Chinese (Traditional
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10.5 Euro Symbol Support for AIX (4
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Any UTF-8 based locale installed on
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Encoding UTF-8 multi-byte: Byte S
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Keyword p_sign_posn n_sign_posn Des
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Table 54 summarizes the AIX keyboar
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10.5.4 Input Methods for the Euro S
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A selection menu can be closed by p
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Figure 55. UNIVERSAL Input Method:
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Table 56 summarizes the new iconv c
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Converter Type Fileset UCS-2_IBM-11
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• X11.loc.XX_XX.Dt.rte • X11.lo
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Figure 56. German UTF-8: Add Additi
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SMIT uses the chlang command to set
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os.loc.iso.de_DE bos.loc.iso.en_US
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• Thai Cultural Conventions (Unic
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In Japan, most of operating systems
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X11.base.rte This fileset ships the
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Documentation Search Service does n
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Figure 59. Searching Japanese Docum
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Figure 61. A Japanese Book 10.7.3.2
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Figure 63. Input Chinese Character
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Figure 65. A Chinese Book for Insta
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Client 3 capabilities. In this case
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Figure 67. Stand-Alone LDAP Directo
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provides encryption of data and tra
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Changes to schema definitions previ
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environments may vary significantly
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• AIX Version 4 Getting Started,
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• http://www.lexmark.com • http
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How Customers Can Get ITSO Redbooks
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LDIF LFT LID LP LPI LPP LPR/LPD LDA
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authentication 300 authentication h
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E ed command 141 EDTMPDIR 141 effec
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kernel changes. crash command 17 de
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-command security 166 RDB glue 299
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web based systems management 95 arc
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SG24-2014-01 Printed in the U.S.A.
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AIX Version 4.3 Differences Guide

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