SinglePI
Benchtype:
CPU and Memory
Memory footprint:
Low to very high
Description:
SinglePI uses in the current version the Chudnovsky algorithm (older versions used the Gauss–Legendre algorithm)
to compute digits of π, Link: Wikipedia.org . For now MaxxPI² can calculate up to 268.435.456 Digits of Pi (256M)
and is designed as a single-thread function. It uses one core. As result, an intensive useage of MMX/SSEx is given.
With MENU -► Options-► Configuration you be able to define a specific core for calculation.
SinglePI is also used by MaxxPI-Preview-Single.
Memory usage:
Detailed memory usage as follows (this may differ depending your used OS):
| Digits of PI | Memory usage (MByte) |
| 128K | 2 |
| 256K | 4 |
| 512K | 6 |
| 1M | 11 |
| 2M | 23 |
| 4M | 44 |
| 8M | 79 |
| 16M | 162 |
| 32M | 300 |
| 64M | 580 |
| 128M | 1150 |
| (*)256M | 2280 |
(*) only available if x64 OS is present
Reached results (score):
Is given in K/sec., for easier compareing achieved results.
Instead of having to say 2min 32sec 343ms 123us, now you need only to tell one single number, K/sec.
It is nothing else than: the number of calculated decimal places per sec. in K (1024).
For example:
PI-calculation 1M became 356.2 K/sec. This means that the used CPU was able
to calculate 3.647.488 (1024 x 356.2) decimal places per second.
MaxxPI² also shows the used time for calculation (Calculated in) in the traditional way.
Further given informations:
Displaytime (Displayed in), shows the time needed to show the current resultset.
CRC (CRC32), shows the calculated crc32 value for the result
(it's used for validation-check (CRC Valid) with two results: NOT Valid! / Valid).