Stijn Comments - Answer Overflow

Stijn

•Created by Jack Clayton on 5/10/2024 in #community-showcase

Basalt: ML Framework

There are definitely some influences from other frameworks, but it's also very much tailored to whatever Mojo allows. You'll should recognize stuff from pytorch, tinygrad, mlx. Those are probably the ones that are most looked at

26 replies

MModular

•Created by NKspartan on 5/14/2024 in #questions

Will mojo support JIT compilation?

Could you share an example?

25 replies

MModular

•Created by ivellapillil on 5/15/2024 in #community-showcase

Online book on Mojo

🔥

35 replies

MModular

•Created by NKspartan on 5/14/2024 in #questions

Will mojo support JIT compilation?

25 replies

MModular

•Created by Stijn on 4/1/2024 in #questions

Parameters style guide

Sorry for the delay. Filed the issue here https://github.com/modularml/mojo/issues/2557

11 replies

MModular

•Created by Stijn on 4/1/2024 in #questions

Parameters style guide

Thanks Joe

11 replies

MModular

•Created by Kyle Hassold on 10/28/2023 in #questions

Fastest Matrix Multiplication

@jon-chuang Very impressive result. Thanks for sharing

20 replies

MModular

•Created by seb on 10/22/2023 in #questions

List of memory-only structs

Just found this: https://docs.modular.com/mojo/stdlib/builtin/builtin_list.html#variadiclistmem. Just handling pointers without having to deal with register_passable("trivial")

8 replies

MModular

•Created by seb on 10/22/2023 in #questions

List of memory-only structs

@seb This looks like a working workaround. Will have a better look at it later: cfr. @rd4com : new small tutorial: 🤹 making lists of structs with magic operators (until lifetimes) https://github.com/rd4com/mojo-learning/blob/main/tutorials/lists-of-structs-magic-operators-pre-lifetimes.md

8 replies

MModular

•Created by seb on 10/22/2023 in #questions

List of memory-only structs

I'm here now (trying to work around it)

struct MyClass[dtype: DType]:
    var tensor: Tensor[dtype]
    fn init(inout self, tensor: Tensor[dtype]):
        self.tensor = tensor


fn main():
    alias dtype = DType.float32
    alias nelts: Int = simdwidthof[dtype]()

    let tensor: Tensor[dtype] = rand[dtype](2, 5)
    var myelement = MyClass[dtype](tensor)


    let xPtr = Pointer[MyClass[dtype]].address_of(myelement)  # get address memory of x
    print(xPtr.as_index())  # print address memory of x

    var vec = DynamicVector[Pointer[MyClass[dtype]]]()
    vec.push_back(xPtr)
    for i in range(vec.size):
        print(vec[i].as_index())

    let x : MyClass[dtype] = xPtr.load()
    print(x.tensor)

struct MyClass[dtype: DType]:
    var tensor: Tensor[dtype]
    fn init(inout self, tensor: Tensor[dtype]):
        self.tensor = tensor


fn main():
    alias dtype = DType.float32
    alias nelts: Int = simdwidthof[dtype]()

    let tensor: Tensor[dtype] = rand[dtype](2, 5)
    var myelement = MyClass[dtype](tensor)


    let xPtr = Pointer[MyClass[dtype]].address_of(myelement)  # get address memory of x
    print(xPtr.as_index())  # print address memory of x

    var vec = DynamicVector[Pointer[MyClass[dtype]]]()
    vec.push_back(xPtr)
    for i in range(vec.size):
        print(vec[i].as_index())

    let x : MyClass[dtype] = xPtr.load()
    print(x.tensor)

But you can't do the pointer.load() as well. I know you could probably do it with Low level IR. But i would rather not go down that rabithole

8 replies

MModular

•Created by seb on 10/22/2023 in #questions

List of memory-only structs

@Stole @seb Currently running into the same error. I tried to store the pointers of your class in a DynamicVector and that works. But when you are trying to dereference again it produces the same error. Any of you, or anyone else, that have found a workaround while we are waiting for traits?

8 replies

MModular

•Created by Stijn on 10/22/2023 in #questions

redefinition of symbol named '$< ... >'

New github issue https://github.com/modularml/mojo/issues/1140

6 replies

MModular

•Created by Stijn on 10/22/2023 in #questions

redefinition of symbol named '$< ... >'

Yeah i might do that

6 replies

MModular

•Created by Stijn on 10/2/2023 in #questions

cannot be copied into its destination

Solved it:

    @always_inline
    fn __copyinit__(inout self, other: Matrix[dtype, n_rows, n_cols]):
        self.data = DTypePointer[dtype].alloc(n_rows * n_cols)
        for y in range(n_rows):
            for x in range(n_cols):
                self.data.simd_store[1](y * n_cols + x, other.data.simd_load[1](y * n_cols + x))
        self.rows = other.rows
        self.cols = other.cols

    @always_inline
    fn __copyinit__(inout self, other: Matrix[dtype, n_rows, n_cols]):
        self.data = DTypePointer[dtype].alloc(n_rows * n_cols)
        for y in range(n_rows):
            for x in range(n_cols):
                self.data.simd_store[1](y * n_cols + x, other.data.simd_load[1](y * n_cols + x))
        self.rows = other.rows
        self.cols = other.cols

4 replies

MModular

•Created by Stijn on 10/2/2023 in #questions

cannot be copied into its destination

As soon as I start using the copies I'm getting:

free(): double free detected in tcache 2
Please submit a bug report to https://github.com/modularml/mojo/issues and include the crash backtrace along with all the relevant source codes.
Stack dump:
0.      Program arguments: mojo run main.mojo
 #0 0x00005602b1ba3797 (mojo+0x5bc797)
 #1 0x00005602b1ba136e (mojo+0x5ba36e)
 #2 0x00005602b1ba3e6f (mojo+0x5bce6f)
 #3 0x00007f7086242520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00007f7086296a7c __pthread_kill_implementation ./nptl/./nptl/pthread_kill.c:44:76
 #5 0x00007f7086296a7c __pthread_kill_internal ./nptl/./nptl/pthread_kill.c:78:10
 #6 0x00007f7086296a7c pthread_kill ./nptl/./nptl/pthread_kill.c:89:10
 #7 0x00007f7086242476 gsignal ./signal/../sysdeps/posix/raise.c:27:6
 #8 0x00007f70862287f3 abort ./stdlib/./stdlib/abort.c:81:7
 #9 0x00007f70862896f6 __libc_message ./libio/../sysdeps/posix/libc_fatal.c:155:5
#10 0x00007f70862a0d7c ./malloc/./malloc/malloc.c:5668:3
#11 0x00007f70862a312b _int_free ./malloc/./malloc/malloc.c:4687:2
#12 0x00007f70862a54d3 __libc_free ./malloc/./malloc/malloc.c:3394:3
#13 0x00007f6fc400150f 
Aborted

free(): double free detected in tcache 2
Please submit a bug report to https://github.com/modularml/mojo/issues and include the crash backtrace along with all the relevant source codes.
Stack dump:
0.      Program arguments: mojo run main.mojo
 #0 0x00005602b1ba3797 (mojo+0x5bc797)
 #1 0x00005602b1ba136e (mojo+0x5ba36e)
 #2 0x00005602b1ba3e6f (mojo+0x5bce6f)
 #3 0x00007f7086242520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00007f7086296a7c __pthread_kill_implementation ./nptl/./nptl/pthread_kill.c:44:76
 #5 0x00007f7086296a7c __pthread_kill_internal ./nptl/./nptl/pthread_kill.c:78:10
 #6 0x00007f7086296a7c pthread_kill ./nptl/./nptl/pthread_kill.c:89:10
 #7 0x00007f7086242476 gsignal ./signal/../sysdeps/posix/raise.c:27:6
 #8 0x00007f70862287f3 abort ./stdlib/./stdlib/abort.c:81:7
 #9 0x00007f70862896f6 __libc_message ./libio/../sysdeps/posix/libc_fatal.c:155:5
#10 0x00007f70862a0d7c ./malloc/./malloc/malloc.c:5668:3
#11 0x00007f70862a312b _int_free ./malloc/./malloc/malloc.c:4687:2
#12 0x00007f70862a54d3 __libc_free ./malloc/./malloc/malloc.c:3394:3
#13 0x00007f6fc400150f 
Aborted

Any idea?

4 replies

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