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    Subjectuser-mode port 0.17-2.3.99-pre2
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    The user-mode port has been updated to 2.3.99-pre2.

    Other changes include:
    Redid the system call mechanism to fix a bug that was causing the occasional
    system call to return a random number, to clean up the code, and to speed it
    up. I reran lmbench, the results are below.
    Gave the block driver a little geometry support.
    Hooked up a couple more system calls.
    Assorted other bug fixes and cleanups.

    The patch, kernel, and packages have all been updated and are available from
    http://sourceforge.net/project/filelist.php?group_id=429
    The kernel now has vfat, iso9660, and minix compiled in.

    The project home page is at http://user-mode-linux.sourceforge.net

    Jeff

    here are the lmbench numbers - each group of three kernels is :
    the native kernel
    the 2.3.99-pre1 user-mode kernel
    the 2.3.99-pre2 user-mode kernel

    L M B E N C H 1 . 9 S U M M A R Y
    ------------------------------------
    (Alpha software, do not distribute)

    Processor, Processes - times in microseconds - smaller is better
    ----------------------------------------------------------------
    Host OS Mhz null null open selct sig sig fork exec sh
    call I/O stat clos inst hndl proc proc proc
    --------- ------------- ---- ---- ---- ---- ---- ----- ---- ---- ---- ---- ----
    i686-linu Linux 2.2.5-1 448 0.6 1.0 7 8 0.04K 2.1 3 0.3K 1K 7K
    um-linuxo Linux 2.3.99- 448 99.2 168 135 244 0.15K 103.2 33 9.5K 19K
    57K
    um-linuxo Linux 2.3.99- 448 46.1 85. 80 134 0.09K 49.5 73 8.7K 17K
    48K

    Context switching - times in microseconds - smaller is better
    -------------------------------------------------------------
    Host OS 2p/0K 2p/16K 2p/64K 8p/16K 8p/64K 16p/16K 16p/64K
    ctxsw ctxsw ctxsw ctxsw ctxsw ctxsw ctxsw
    --------- ------------- ----- ------ ------ ------ ------ ------- -------
    i686-linu Linux 2.2.5-1 1 15 46 15 130 18 166
    um-linuxo Linux 2.3.99- 530 557 471 547
    um-linuxo Linux 2.3.99- 457 8 14 64

    *Local* Communication latencies in microseconds - smaller is better
    -------------------------------------------------------------------
    Host OS 2p/0K Pipe AF UDP RPC/ TCP RPC/ TCP
    ctxsw UNIX UDP TCP conn
    --------- ------------- ----- ----- ---- ----- ----- ----- ----- ----
    i686-linu Linux 2.2.5-1 1 7 13 35 61
    um-linuxo Linux 2.3.99- 530 1306 1259
    um-linuxo Linux 2.3.99- 457 975 1412

    File & VM system latencies in microseconds - smaller is better
    --------------------------------------------------------------
    Host OS 0K File 10K File Mmap Prot Page
    Create Delete Create Delete Latency Fault Fault
    --------- ------------- ------ ------ ------ ------ ------- ----- -----
    i686-linu Linux 2.2.5-1 14 1 26 2 10863 1 0.6K
    um-linuxo Linux 2.3.99- 52 16 473 43 3578 0.2K
    um-linuxo Linux 2.3.99- 35 10 304 13 3324 0.2K

    *Local* Communication bandwidths in MB/s - bigger is better
    -----------------------------------------------------------
    Host OS Pipe AF TCP File Mmap Bcopy Bcopy Mem Mem
    UNIX reread reread (libc) (hand) read write
    --------- ------------- ---- ---- ---- ------ ------ ------ ------ ---- -----
    i686-linu Linux 2.2.5-1 338 124 -1 170 335 150 145 336 198
    um-linuxo Linux 2.3.99- 5 26 -1 129 334 157 151 339 209
    um-linuxo Linux 2.3.99- 5 19 -1 147 336 156 151 339 82

    Memory latencies in nanoseconds - smaller is better
    (WARNING - may not be correct, check graphs)
    ---------------------------------------------------
    Host OS Mhz L1 $ L2 $ Main mem Guesses
    --------- ------------- --- ---- ---- -------- -------
    i686-linu Linux 2.2.5-1 448 6 49 152
    um-linuxo Linux 2.3.99- 448 6 49 152
    um-linuxo Linux 2.3.99- 448 6 49 152



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