Set INITIAL_MEMORY and MAXIMUM_MEMORY must -s ALLOW_MEMORY_GROWTH=1 ?

[yangfangfang1204]

I Set INITIAL_MEMORY =100MB, and MAXIMUM_MEMORY = 1000MB, -s ALLOW_MEMORY_GROWTH=0
the .js is
new WebAssembly.Memory({"initial":INITIAL_MEMORY/65536,"maximum":INITIAL_MEMORY/65536,"shared":true});

and if i set -s ALLOW_MEMORY_GROWTH=1:
the .js is
new WebAssembly.Memory({"initial":INITIAL_MEMORY/65536,"maximum":1048576e3/65536,"shared":true});

so if i want to use the Memory greater than 100MB , i must set -s ALLOW_MEMORY_GROWTH=1 ?

[sbc100]

Yes, if you want the memory to grow at all you need -sALLOW_MEMORY_GROWTH. Without this option memory cannot grow and maximum will always be the same as initial.

(if that answers your question place go ahead and close this issue).

[yangfangfang1204]

INITIAL_MEMORY =100MB, and MAXIMUM_MEMORY = 1000MB, -s ALLOW_MEMORY_GROWTH=1
If i set -s ALLOW_MEMORY_GROWTH=1 , the memory will not be greater than 1000MB. right? Because I also set MAXIMUM_MEMORY = 1000MB ?

[sbc100]

Yes exactly. I fact, MAXIMUM_MEMORY only makes sense if ALLOW_MEMORY_GROWTH is enabled.

[yangfangfang1204]

i use pthread and set allow_memory_growth. -s ALLOW_MEMORY_GROWTH=1 -s USE_PTHREADS=1 , And there is a warnning.
USE_PTHREADS+ALLOW_MEMORY_GROWTH may run non-wasm code slowly, What's the effect?Running speed down?

[yangfangfang1204]

the compile is
-s USE_PTHREADS=1 -s INITIAL_MEMORY=100MB -s MAXIMUM_MEMORY=1000MB -s ALLOW_MEMORY_GROWTH=1 -s MAX_WEBGL_VERSION=2 -s USE_FREETYPE=1 -lopenal -s PTHREAD_POOL_SIZE_STRICT=0 -s OFFSCREENCANVAS_SUPPORT=1 -s PROXY_TO_PTHREAD=1

[sbc100]

i use pthread and set allow_memory_growth. -s ALLOW_MEMORY_GROWTH=1 -s USE_PTHREADS=1 , And there is a warnning.
USE_PTHREADS+ALLOW_MEMORY_GROWTH may run non-wasm code slowly, What's the effect?Running speed down?

Yes, as the warning says this configuration runs JS code more slowly, I believe because it need to constantly check for a detached memory. Perhaps @kripken can quantify the slowdown.

Obviously, if you can avoid that combination it would be good idea to do so.