Red Hat Training

A Red Hat training course is available for Red Hat Enterprise Linux

6. 工​​​​​​​​​​​​​​​具​​​​​​​​​​​​​​​更​​​​​​​​​​​​​​​新​​​​​​​​​​​​​​​

重要

All the IBM Java components are available online due to a late detection of missing COPYRIGHT notice. This applies to the Supplementary CD contents for Red Hat Enterprise Linux 5 on all architectures and releases. For more information, see the Red Hat Knowledgebase.
  • SystemTap is now fully supported, and has been re-based to the latest upstream version. This update features improved user-space probing through shared libraries, experimental DWARF unwinding, and a new <sys/sdt.h> header file which provides dtrace-compatible markers.
    This re-base also enhances support for debuginfo-less operations. Typecasting (through the @cast operator) is now supported, along with kernel tracepoint probing. Several 'kprobe.*' probe bugs that hampered debuginfo-less operations are also now resolved.
    SystemTap also features several documentation improvements. A new '3stap' feature provides users with useful man pages on most SystemTap probes and functions. The systemtap-testsuite package also features a larger library of sample scripts.
    欲​​​​​​​​​​​​​​​取​​​​​​​​​​​​​​​得​​​​​​​​​​​​​​​更​​​​​​​​​​​​​​​多​​​​​​​​​​​​​​​有​​​​​​​​​​​​​​​關​​​​​​​​​​​​​​​於​​​​​​​​​​​​​​​ SystemTap 更​​​​​​​​​​​​​​​新​​​​​​​​​​​​​​​上​​​​​​​​​​​​​​​的​​​​​​​​​​​​​​​相​​​​​​​​​​​​​​​關​​​​​​​​​​​​​​​資​​​​​​​​​​​​​​​訊​​​​​​​​​​​​​​​,請​​​​​​​​​​​​​​​參​​​​​​​​​​​​​​​閱​​​​​​​​​​​​​​​技​​​​​​​​​​​​​​​術​​​​​​​​​​​​​​​公​​​​​​​​​​​​​​​告​​​​​​​​​​​​​​​的​​​​​​​​​​​​​​​套​​​​​​​​​​​​​​​件​​​​​​​​​​​​​​​更​​​​​​​​​​​​​​​新​​​​​​​​​​​​​​​章​​​​​​​​​​​​​​​節​​​​​​​​​​​​​​​中​​​​​​​​​​​​​​​的​​​​​​​​​​​​​​​ SystemTap 部​​​​​​​​​​​​​​​份​​​​​​​​​​​​​​​。​​​​​​​​​​​​​​​
  • Systemtap tracepoint 放​​​​​​​​​​​​​​​置​​​​​​​​​​​​​​​在​​​​​​​​​​​​​​​ kernel 的​​​​​​​​​​​​​​​重​​​​​​​​​​​​​​​要​​​​​​​​​​​​​​​部​​​​​​​​​​​​​​​份​​​​​​​​​​​​​​​中​​​​​​​​​​​​​​​,它​​​​​​​​​​​​​​​可​​​​​​​​​​​​​​​讓​​​​​​​​​​​​​​​系​​​​​​​​​​​​​​​統​​​​​​​​​​​​​​​管​​​​​​​​​​​​​​​理​​​​​​​​​​​​​​​員​​​​​​​​​​​​​​​分​​​​​​​​​​​​​​​析​​​​​​​​​​​​​​​程​​​​​​​​​​​​​​​式​​​​​​​​​​​​​​​碼​​​​​​​​​​​​​​​的​​​​​​​​​​​​​​​效​​​​​​​​​​​​​​​能​​​​​​​​​​​​​​​和​​​​​​​​​​​​​​​針​​​​​​​​​​​​​​​對​​​​​​​​​​​​​​​於​​​​​​​​​​​​​​​程​​​​​​​​​​​​​​​式​​​​​​​​​​​​​​​碼​​​​​​​​​​​​​​​的​​​​​​​​​​​​​​​一​​​​​​​​​​​​​​​部​​​​​​​​​​​​​​​分​​​​​​​​​​​​​​​進​​​​​​​​​​​​​​​行​​​​​​​​​​​​​​​除​​​​​​​​​​​​​​​錯​​​​​​​​​​​​​​​。​​​​​​​​​​​​​​​在​​​​​​​​​​​​​​​ Red Hat Enterprise Linux 5.4 中​​​​​​​​​​​​​​​,tracepoint 已​​​​​​​​​​​​​​​被​​​​​​​​​​​​​​​新​​​​​​​​​​​​​​​增​​​​​​​​​​​​​​​至​​​​​​​​​​​​​​​下​​​​​​​​​​​​​​​列​​​​​​​​​​​​​​​的​​​​​​​​​​​​​​​ kernel 子​​​​​​​​​​​​​​​系​​​​​​​​​​​​​​​統​​​​​​​​​​​​​​​部​​​​​​​​​​​​​​​份​​​​​​​​​​​​​​​中​​​​​​​​​​​​​​​作​​​​​​​​​​​​​​​為​​​​​​​​​​​​​​​技​​​​​​​​​​​​​​​術​​​​​​​​​​​​​​​預​​​​​​​​​​​​​​​覽​​​​​​​​​​​​​​​:
    • 記​​​​​​​​​​​​​​​憶​​​​​​​​​​​​​​​體​​​​​​​​​​​​​​​管​​​​​​​​​​​​​​​理​​​​​​​​​​​​​​​(Memory Management,mm)(BZ#493444)
    • 區​​​​​​​​​​​​​​​塊​​​​​​​​​​​​​​​裝​​​​​​​​​​​​​​​置​​​​​​​​​​​​​​​ I/O(blktrace)(Bugzilla #493454)
    • 網​​​​​​​​​​​​​​​路​​​​​​​​​​​​​​​檔​​​​​​​​​​​​​​​案​​​​​​​​​​​​​​​系​​​​​​​​​​​​​​​統​​​​​​​​​​​​​​​(NFS)(BZ#499008)
    • 頁​​​​​​​​​​​​​​​面​​​​​​​​​​​​​​​快​​​​​​​​​​​​​​​取​​​​​​​​​​​​​​​(Page Cache)和​​​​​​​​​​​​​​​網​​​​​​​​​​​​​​​路​​​​​​​​​​​​​​​作​​​​​​​​​​​​​​​業​​​​​​​​​​​​​​​堆​​​​​​​​​​​​​​​疊​​​​​​​​​​​​​​​(Networking Stacks)(BZ#475719)
    • 排​​​​​​​​​​​​​​​程​​​​​​​​​​​​​​​器​​​​​​​​​​​​​​​(Scheduler)(BZ#497414)
  • Gnu Compiler Collection 版​​​​​​​​​​​​​​​本​​​​​​​​​​​​​​​ 4.4(GCC4.4)現​​​​​​​​​​​​​​​在​​​​​​​​​​​​​​​已​​​​​​​​​​​​​​​包​​​​​​​​​​​​​​​含​​​​​​​​​​​​​​​在​​​​​​​​​​​​​​​此​​​​​​​​​​​​​​​發​​​​​​​​​​​​​​​行​​​​​​​​​​​​​​​版​​​​​​​​​​​​​​​中​​​​​​​​​​​​​​​作​​​​​​​​​​​​​​​為​​​​​​​​​​​​​​​技​​​​​​​​​​​​​​​術​​​​​​​​​​​​​​​預​​​​​​​​​​​​​​​覽​​​​​​​​​​​​​​​。​​​​​​​​​​​​​​​這​​​​​​​​​​​​​​​組​​​​​​​​​​​​​​​編​​​​​​​​​​​​​​​譯​​​​​​​​​​​​​​​器​​​​​​​​​​​​​​​包​​​​​​​​​​​​​​​含​​​​​​​​​​​​​​​了​​​​​​​​​​​​​​​ C、​​​​​​​​​​​​​​​C++ 以​​​​​​​​​​​​​​​及​​​​​​​​​​​​​​​ Fortran 編​​​​​​​​​​​​​​​譯​​​​​​​​​​​​​​​器​​​​​​​​​​​​​​​和​​​​​​​​​​​​​​​支​​​​​​​​​​​​​​​援​​​​​​​​​​​​​​​函​​​​​​​​​​​​​​​式​​​​​​​​​​​​​​​庫​​​​​​​​​​​​​​​。​​​​​​​​​​​​​​​
  • glibc new MALLOC behaviour: 上​​​​​​​​​​​​​​​游​​​​​​​​​​​​​​​的​​​​​​​​​​​​​​​ glibc 最​​​​​​​​​​​​​​​近​​​​​​​​​​​​​​​已​​​​​​​​​​​​​​​被​​​​​​​​​​​​​​​更​​​​​​​​​​​​​​​改​​​​​​​​​​​​​​​並​​​​​​​​​​​​​​​改​​​​​​​​​​​​​​​善​​​​​​​​​​​​​​​了​​​​​​​​​​​​​​​許​​​​​​​​​​​​​​​多​​​​​​​​​​​​​​​ socket 與​​​​​​​​​​​​​​​核​​​​​​​​​​​​​​​心​​​​​​​​​​​​​​​的​​​​​​​​​​​​​​​規​​​​​​​​​​​​​​​模​​​​​​​​​​​​​​​可​​​​​​​​​​​​​​​伸​​​​​​​​​​​​​​​縮​​​​​​​​​​​​​​​性​​​​​​​​​​​​​​​。​​​​​​​​​​​​​​​這​​​​​​​​​​​​​​​是​​​​​​​​​​​​​​​透​​​​​​​​​​​​​​​過​​​​​​​​​​​​​​​指​​​​​​​​​​​​​​​派​​​​​​​​​​​​​​​給​​​​​​​​​​​​​​​線​​​​​​​​​​​​​​​程​​​​​​​​​​​​​​​它​​​​​​​​​​​​​​​們​​​​​​​​​​​​​​​自​​​​​​​​​​​​​​​己​​​​​​​​​​​​​​​的​​​​​​​​​​​​​​​記​​​​​​​​​​​​​​​憶​​​​​​​​​​​​​​​體​​​​​​​​​​​​​​​池​​​​​​​​​​​​​​​(memory pool)並​​​​​​​​​​​​​​​避​​​​​​​​​​​​​​​免​​​​​​​​​​​​​​​在​​​​​​​​​​​​​​​某​​​​​​​​​​​​​​​些​​​​​​​​​​​​​​​情​​​​​​​​​​​​​​​況​​​​​​​​​​​​​​​下​​​​​​​​​​​​​​​被​​​​​​​​​​​​​​​鎖​​​​​​​​​​​​​​​定​​​​​​​​​​​​​​​來​​​​​​​​​​​​​​​完​​​​​​​​​​​​​​​成​​​​​​​​​​​​​​​的​​​​​​​​​​​​​​​。​​​​​​​​​​​​​​​使​​​​​​​​​​​​​​​用​​​​​​​​​​​​​​​來​​​​​​​​​​​​​​​作​​​​​​​​​​​​​​​為​​​​​​​​​​​​​​​記​​​​​​​​​​​​​​​憶​​​​​​​​​​​​​​​體​​​​​​​​​​​​​​​池​​​​​​​​​​​​​​​的​​​​​​​​​​​​​​​額​​​​​​​​​​​​​​​外​​​​​​​​​​​​​​​記​​​​​​​​​​​​​​​憶​​​​​​​​​​​​​​​體​​​​​​​​​​​​​​​(若​​​​​​​​​​​​​​​存​​​​​​​​​​​​​​​在​​​​​​​​​​​​​​​的​​​​​​​​​​​​​​​話​​​​​​​​​​​​​​​)可​​​​​​​​​​​​​​​透​​​​​​​​​​​​​​​過​​​​​​​​​​​​​​​使​​​​​​​​​​​​​​​用​​​​​​​​​​​​​​​環​​​​​​​​​​​​​​​境​​​​​​​​​​​​​​​變​​​​​​​​​​​​​​​數​​​​​​​​​​​​​​​ MALLOC_ARENA_TEST 和​​​​​​​​​​​​​​​ MALLOC_ARENA_MAX 來​​​​​​​​​​​​​​​進​​​​​​​​​​​​​​​行​​​​​​​​​​​​​​​控​​​​​​​​​​​​​​​制​​​​​​​​​​​​​​​。​​​​​​​​​​​​​​​
    MALLOC_ARENA_TEST 指​​​​​​​​​​​​​​​定​​​​​​​​​​​​​​​當​​​​​​​​​​​​​​​記​​​​​​​​​​​​​​​憶​​​​​​​​​​​​​​​體​​​​​​​​​​​​​​​池​​​​​​​​​​​​​​​的​​​​​​​​​​​​​​​數​​​​​​​​​​​​​​​量​​​​​​​​​​​​​​​到​​​​​​​​​​​​​​​達​​​​​​​​​​​​​​​了​​​​​​​​​​​​​​​核​​​​​​​​​​​​​​​心​​​​​​​​​​​​​​​數​​​​​​​​​​​​​​​量​​​​​​​​​​​​​​​的​​​​​​​​​​​​​​​值​​​​​​​​​​​​​​​之​​​​​​​​​​​​​​​後​​​​​​​​​​​​​​​便​​​​​​​​​​​​​​​會​​​​​​​​​​​​​​​進​​​​​​​​​​​​​​​行​​​​​​​​​​​​​​​核​​​​​​​​​​​​​​​心​​​​​​​​​​​​​​​的​​​​​​​​​​​​​​​測​​​​​​​​​​​​​​​試​​​​​​​​​​​​​​​。​​​​​​​​​​​​​​​MALLOC_ARENA_MAX 是​​​​​​​​​​​​​​​用​​​​​​​​​​​​​​​來​​​​​​​​​​​​​​​設​​​​​​​​​​​​​​​定​​​​​​​​​​​​​​​所​​​​​​​​​​​​​​​使​​​​​​​​​​​​​​​用​​​​​​​​​​​​​​​的​​​​​​​​​​​​​​​記​​​​​​​​​​​​​​​憶​​​​​​​​​​​​​​​體​​​​​​​​​​​​​​​池​​​​​​​​​​​​​​​的​​​​​​​​​​​​​​​最​​​​​​​​​​​​​​​大​​​​​​​​​​​​​​​數​​​​​​​​​​​​​​​量​​​​​​​​​​​​​​​,無​​​​​​​​​​​​​​​論​​​​​​​​​​​​​​​核​​​​​​​​​​​​​​​心​​​​​​​​​​​​​​​的​​​​​​​​​​​​​​​數​​​​​​​​​​​​​​​量​​​​​​​​​​​​​​​為​​​​​​​​​​​​​​​何​​​​​​​​​​​​​​​。​​​​​​​​​​​​​​​
    RHEL 5.4 發​​​​​​​​​​​​​​​行​​​​​​​​​​​​​​​版​​​​​​​​​​​​​​​中​​​​​​​​​​​​​​​的​​​​​​​​​​​​​​​ glibc 已​​​​​​​​​​​​​​​整​​​​​​​​​​​​​​​合​​​​​​​​​​​​​​​了​​​​​​​​​​​​​​​這​​​​​​​​​​​​​​​項​​​​​​​​​​​​​​​功​​​​​​​​​​​​​​​能​​​​​​​​​​​​​​​作​​​​​​​​​​​​​​​為​​​​​​​​​​​​​​​上​​​​​​​​​​​​​​​游​​​​​​​​​​​​​​​ malloc 的​​​​​​​​​​​​​​​技​​​​​​​​​​​​​​​術​​​​​​​​​​​​​​​預​​​​​​​​​​​​​​​覽​​​​​​​​​​​​​​​。​​​​​​​​​​​​​​​若​​​​​​​​​​​​​​​要​​​​​​​​​​​​​​​啟​​​​​​​​​​​​​​​用​​​​​​​​​​​​​​​個​​​​​​​​​​​​​​​別​​​​​​​​​​​​​​​的​​​​​​​​​​​​​​​線​​​​​​​​​​​​​​​程​​​​​​​​​​​​​​​記​​​​​​​​​​​​​​​憶​​​​​​​​​​​​​​​體​​​​​​​​​​​​​​​池​​​​​​​​​​​​​​​,環​​​​​​​​​​​​​​​境​​​​​​​​​​​​​​​中​​​​​​​​​​​​​​​就​​​​​​​​​​​​​​​必​​​​​​​​​​​​​​​須​​​​​​​​​​​​​​​設​​​​​​​​​​​​​​​定​​​​​​​​​​​​​​​記​​​​​​​​​​​​​​​憶​​​​​​​​​​​​​​​體​​​​​​​​​​​​​​​變​​​​​​​​​​​​​​​數​​​​​​​​​​​​​​​ MALLOC_PER_THREAD。​​​​​​​​​​​​​​​當​​​​​​​​​​​​​​​這​​​​​​​​​​​​​​​個​​​​​​​​​​​​​​​新​​​​​​​​​​​​​​​的​​​​​​​​​​​​​​​ malloc 特​​​​​​​​​​​​​​​性​​​​​​​​​​​​​​​在​​​​​​​​​​​​​​​未​​​​​​​​​​​​​​​來​​​​​​​​​​​​​​​的​​​​​​​​​​​​​​​發​​​​​​​​​​​​​​​行​​​​​​​​​​​​​​​版​​​​​​​​​​​​​​​中​​​​​​​​​​​​​​​成​​​​​​​​​​​​​​​為​​​​​​​​​​​​​​​了​​​​​​​​​​​​​​​預​​​​​​​​​​​​​​​設​​​​​​​​​​​​​​​特​​​​​​​​​​​​​​​性​​​​​​​​​​​​​​​時​​​​​​​​​​​​​​​,此​​​​​​​​​​​​​​​環​​​​​​​​​​​​​​​境​​​​​​​​​​​​​​​變​​​​​​​​​​​​​​​數​​​​​​​​​​​​​​​便​​​​​​​​​​​​​​​無​​​​​​​​​​​​​​​須​​​​​​​​​​​​​​​再​​​​​​​​​​​​​​​被​​​​​​​​​​​​​​​使​​​​​​​​​​​​​​​用​​​​​​​​​​​​​​​。​​​​​​​​​​​​​​​遇​​​​​​​​​​​​​​​上​​​​​​​​​​​​​​​ malloc 資​​​​​​​​​​​​​​​源​​​​​​​​​​​​​​​衝​​​​​​​​​​​​​​​突​​​​​​​​​​​​​​​的​​​​​​​​​​​​​​​用​​​​​​​​​​​​​​​戶​​​​​​​​​​​​​​​應​​​​​​​​​​​​​​​啟​​​​​​​​​​​​​​​用​​​​​​​​​​​​​​​此​​​​​​​​​​​​​​​選​​​​​​​​​​​​​​​項​​​​​​​​​​​​​​​。​​​​​​​​​​​​​​​