歡喜聊天區！除了有關暴力、血腥、色情與測試項目以外，都可聊！
Moderator: Forums Team
benny
Posts: 1120 Joined: Sun Apr 06, 2003 7:03 pmLocation: 家裡
Contact:
Post
by benny Sat Jul 10, 2004 12:18 am
本來換了硬碟，又懶的去找 CFLAGS..
所以就用了預設的去改:
CFLAGS="-march=pentium3 -O3 -pipe"
首先發現速度變慢時是在編譯 kde..總覺得比平常久。使用 KDE 時又覺得軟體的啟動有點慢（還疑神疑鬼的想是不是因為夏天了，CPU太熱....所以 cpu throttle 變慢了)
最後在實在太閒的情況下...拿了 Palatis 的 CFLAGS:
CFLAGS="-Os -mcpu=pentium3 -march=pentium3 -mfpmath=sse,387 -mmmx -fforce-addr -fomit-frame-pointer -funroll-loops -frerun-cse-after-loop -frerun-loop-opt -falign-functions=4 -pipe"
然後 emerge world -epv 。等到一些 core 編完時，就感覺到速度整個變快了。。。是錯覺嗎？不是 :p kde 這次足足少了兩個小時就編譯好了。。
所以...還是建議大家從 Bootstrap 開始吧! 就算再慢的機器還是會提昇效能 (比起 Generic 編譯的版本)
AndCycle
Posts: 22 Joined: Fri Mar 05, 2004 7:24 pm
Post
by AndCycle Sat Jul 10, 2004 1:36 am
一些從gnu gcc manual翻來的東西
http://gcc.gnu.org/onlinedocs/gcc-3.4.0 ... %20Options
http://gcc.gnu.org/onlinedocs/gcc-3.4.0 ... %20Options
-mtune=cpu-type
Tune to cpu-type everything applicable about the generated code, except for the ABI and the set of available instructions
-march=cpu-type
Generate instructions for the machine type cpu-type. The choices for cpu-type are the same as for -mtune. Moreover, specifying -march=cpu-type implies -mtune=cpu-type.
-mcpu=cpu-type
A deprecated synonym for -mtune.
所以說, 宣告了-march就隱含了要用-mtune, -mcpu是mtune的舊稱,
所以對cpu最佳化只需要宣告march,
mfpmath的部分爭議性比較多 ...
mmmx有沒有被cpu最佳化包含? 文件上沒講這點 :X
-fomit-frame-pointer -frerun-cse-after-loop -frerun-loop-opt 有被O2 O3 Os涵蓋到 :p
【Palatis】
Posts: 956 Joined: Wed Apr 02, 2003 4:21 pmLocation: 偶爾插花...</br>亞利安星球
Contact:
Post
by 【Palatis】 Sat Jul 10, 2004 8:37 am
-fomit-frame-pointer's not in any -O* on x86 system due to debugging capacity.
「從麻雀之城回來的時候，被問到『你要大的藤箱還是小的藤箱？』為此煩惱不已。大家都有過這種煩惱吧？」
mongala
Posts: 17 Joined: Mon Aug 11, 2003 10:12 pm
Post
by mongala Sat Jul 10, 2004 11:47 am
GOT wiki裡面有一篇文件啊
Si
Posts: 333 Joined: Sun Apr 20, 2003 12:15 pmLocation: New Zealand
Post
by Si Sat Jul 10, 2004 3:50 pm
哈哈
frid
Posts: 282 Joined: Tue Apr 27, 2004 10:50 pm
Post
by frid Tue Aug 03, 2004 10:29 pm
趁這次/bin家滅門慘案後....剛好從stage1 開始裝
用置頂的cflags(我是pentium4 mobile)..
從stage1->stage2還沒啥感覺...因為我上次從stage2開始裝
但是從stage2->stage3就很有感覺..3hr!!!! 真有感覺(變硬的感覺真好!~~下一句不能唱
)
無奈現在回家撥接中
..要改天才可以把他完成^--^.
期待喔!~~~
billlin
Posts: 7 Joined: Wed Aug 04, 2004 5:22 pmLocation: 似星體
Contact:
Post
by billlin Wed Aug 04, 2004 5:58 pm
我有一台 Sun Ultra AXi 機器, CPU info as follow :
Si
Posts: 333 Joined: Sun Apr 20, 2003 12:15 pmLocation: New Zealand
Post
by Si Wed Aug 04, 2004 6:24 pm
billlin wrote: 我有一台 Sun Ultra AXi 機器, CPU info as follow :
哇！你從哪弄來的這種稀有電腦？！
pahud
24hr 義工
Posts: 1251 Joined: Tue Nov 26, 2002 10:22 pm
Contact:
Post
by pahud Wed Aug 04, 2004 6:37 pm
frid wrote: (變硬的感覺真好!~~下一句不能唱
)
好好笑...
billlin
Posts: 7 Joined: Wed Aug 04, 2004 5:22 pmLocation: 似星體
Contact:
Post
by billlin Wed Aug 04, 2004 7:06 pm
Si wrote: billlin wrote: 我有一台 Sun Ultra AXi 機器, CPU info as follow :
哇！你從哪弄來的這種稀有電腦？！
這原本是一台跑 Solaris 7 的老機器，公司用來跑 mail server，但是我不太熟 Solaris，所以就把它改成 Gentoo。
這台機器是向台灣昇陽買的，CPU 速度是 440Mhz，1GB RAM
36 GB UltraWide SCSI HDD x 4. 價格不詳。雖然 CPU 頻率不快，但是實測結果不輸 P4 1.4 G。
billlin
Posts: 7 Joined: Wed Aug 04, 2004 5:22 pmLocation: 似星體
Contact:
Post
by billlin Mon Aug 09, 2004 1:11 pm
給有需要的人 :
============================
Bill Lin
"echo
xub@cfquxxm.ocy.hk | tr b-y n-yb-m"
============================
..要改天才可以把他完成^--^.