SynthMaker

CPU usage syndrome

Archive · 2009 5 old posts

From the original SynthMaker forum (2004–2014), with its members’ names and dates.

Iman ·

Hi

I run my schematic on two different computers with similar version of windows installed:

1-CPU=Intel P4 2.4 GHz (MMX, SSE, SSE2, SSE3), Sound Card (EMU 1212m latest driver installed) 2-CPU=Celeron M 1.5 GHz (MMX, SSE, SSE2), Sound Card (cheap onboard, Asio forall installed)

But I don’t know why it consumes much less CPU in slower system! In the first setup my schematic consumes 4.4% CPU in stable mode and 16.3% when a note is pressed but in the second system 2% usage for stable mode and 8.9% when a note is pressed.

Is there any other reason that affects CPU usage for SM based plugin?

MyCo ·

What are the settings for ASIO? Samplerate and Buffersize (Latency) are important.

Iman ·

MyCo wrote: What are the settings for ASIO? Samplerate and Buffersize (Latency) are important.

I tried different sample rates and buffersize with no luck solving this issue, Now I run at :

1-44100 20ms For P4 2-44100 12ms For Celeron !

I installed CPUz on both systems. P4 2.4 is winner in all parameters except L1 catch which on Celeron M it is double :

P4 2.4 : L1 Data cache 16 KBytes - L2 cache 1024 KByte CE 1.5 : L1 Data cache 32 KBytes - L2 cache 512 KBytes

No idea ?

MyCo ·

May be, the P4 denormals and the Celeron doesn't

FreeRideSkier ·

I think you’ll find it’s your soundcard.

You have more I/O and that has an overhead.

Also not all drivers are made equal! I used to work for a Soundcard manufacturer and you wouldn’t believe how the speed and efficiency of the drivers vary from different manufacturers.

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