[SOLVED] Too slow on 64-bit system

Question

As I bought a 4g mem (a tot of 6g) I upgrade my arch to 64-bit, and it goes very very slow.
It takes several minutes (after download completed) to install some small software ( like vim ).
And top shows pacman used 97% cpu ( i5 M430 2 core 4 threads , a tot of 25%?).
Then I use vim to open a 100-line c file, it took about 5 seconds ( not only once! ).
It's much slower than my old 32-bit arch.
My new 64-bit windows has the same problem while the 32-bit windows goes well.
Would it be that 64-bit is supported but not well supported by my cpu? Or any solutions?
I don't know what information should be posted here.
If I should post any other information here, please tell me.
Last edited by zero2228 (2012-11-04 15:11:56)

Answer 1

Try takeing out the new stick of ram... you say a total of 6GB, so I assume you also have a 2GB stick in there.... Then see if Arch is still slow.
I am like 99.9999999999% sure that the i5 CPU works fine with 64bit.
NOTE: They Hyper-Threading of the Core-i CPU's is not a linear increase in speed. Like for my:
>Ivy-Bridge moble i7 - Kernel 3.6.5-1-grsec - Hyper-Threading enabled
->/etc/makepkg.conf set to "-j2" (two threads)
It takes ~32min's to compile the Linux Kernel
->/etc/makepkg.conf set to "-j3" (three threads)
It takes ~27min's to compile the Linux Kernel
->/etc/makepkg.conf set to "-j4" (four threads)
It takes ~22min's to comple the Linux Kernel
> 100*(1-(22/32))
[1] 31.25
So, the Hyper-Threading gives my i7-3520M about 30% more speed. Which is good. I read that the Pentium 4HT only produced 20% more speed.
Last edited by hunterthomson (2012-11-04 02:05:51)