C***S
发帖数: 175 | 1 就是处理的数组大了些。 大家推荐一下。
考虑买Dell的，WinXP-64。
这是主要考虑这台机器跟多用于日常工作，计算的功能也要考虑。
买双核有必要吗，内存1G是不是差不多？其他，比如是不是考虑用RAID？
当然，老板的钱。 | a***n
发帖数: 578 | 2
2 CPU is not faster than 1 CPU for computation because the communication
takes a lot of time.
4 CPU is ~2 times faster bah.
【在 C***S 的大作中提到】
: 就是处理的数组大了些。 大家推荐一下。
: 考虑买Dell的，WinXP-64。
: 这是主要考虑这台机器跟多用于日常工作，计算的功能也要考虑。
: 买双核有必要吗，内存1G是不是差不多？其他，比如是不是考虑用RAID？
: 当然，老板的钱。
| n*c
发帖数: 5 | 3
Faint, don't make such comments on sth you don't know.
2 CPUs have communication overheads, 4 CPUs will only have more.
The advantage of more CPUs is:
If you code can be well parallized, it's much faster, many simulation code
can be 2 times faster on a 2 CPU machine, what's really difficult is to
achieve scalability on very large machines.
Even if you only run it on one CPU, you can run two jobs at the same time.
So if you have computational considerations, 2 CPU is definitely worth it.
【在 a***n 的大作中提到】
:
: 2 CPU is not faster than 1 CPU for computation because the communication
: takes a lot of time.
: 4 CPU is ~2 times faster bah.
| a***n
发帖数: 578 | 4 oops. heihei.
【在 n*c 的大作中提到】
:
: Faint, don't make such comments on sth you don't know.
: 2 CPUs have communication overheads, 4 CPUs will only have more.
: The advantage of more CPUs is:
: If you code can be well parallized, it's much faster, many simulation code
: can be 2 times faster on a 2 CPU machine, what's really difficult is to
: achieve scalability on very large machines.
: Even if you only run it on one CPU, you can run two jobs at the same time.
: So if you have computational considerations, 2 CPU is definitely worth it.
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