Profiling compiling mode

[luis]

Q How long does it take for a 64 bit counter to roll over runing at 2 and 4 ghz?

I've calculated it this way: 2 ^ 64 * (1 second / CPU freq in Hz) = seconds to rollover
The number of available bits multiplied by the time required to do one cycle in seconds.

So, for a 2 GHz CPU

Code: Select all

Debug Pow(2,64) * (1.0 / (2 * 1000 * 1000 * 1000)) / 60 / 60 / 24 / 365

gives 292 years ... If I'm not mistaken.

[idle]

Q How long does it take for a 64 bit counter to roll over runing at 2 and 4 ghz?

I've calculated it this way: 2 ^ 64 * (1 second / CPU freq in Hz) = seconds to rollover
The number of available bits multiplied by the time required to do one cycle in seconds.

So, for a 2 GHz CPU

Code: Select all

Debug Pow(2,64) * (1.0 / (2 * 1000 * 1000 * 1000)) / 60 / 60 / 24 / 365

gives 292 years ... If I'm not mistaken.

only that long.
Yes that looks right, thank.

[tored]

The new C backend uses GCC, right? Possible to compile with gprof?

[StarBootics]

The new C backend uses GCC, right? Possible to compile with gprof?

Only Fred can answer that. That being said, Fred will probably want a solution that work for both backends (ASM and C).

Best regards
StarBootics

[idle]

The new C backend uses GCC, right? Possible to compile with gprof?

maybe on linux, doesn't work with the supplied gcc compiler on windows