gpu_arch.py

from multicore import MultiCoreSystem
from vram.ram_controller import RAMController
import os
from gpu_state_db import GPUStateDB
from custom_vram import CustomVRAM
from ai import AIAccelerator

class TensorCoreDB:
    def __init__(self, tensor_core_id, sm_id, db):
        self.tensor_core_id = tensor_core_id
        self.sm_id = sm_id
        self.db = db

    def load_state(self):
        state = self.db.load_state("tensor_core", "tensor_core_id", self.tensor_core_id)
        return state or {}

    def save_state(self, state):
        self.db.save_state("tensor_core", "tensor_core_id", self.tensor_core_id, state)

    def matmul(self, A, B):
        state = self.load_state()
        # Simulate a matrix multiply (for demo, just sum all elements)
        result = sum(sum(row) for row in A) * sum(sum(row) for row in B)
        state["last_result"] = result
        self.save_state(state)
        return result

class OpticalInterconnect:
    def __init__(self, bandwidth_tbps=800, latency_ns=1):
        self.bandwidth_tbps = bandwidth_tbps  # TB/s
        self.latency_ns = latency_ns          # nanoseconds

    def transfer_time(self, data_size_bytes):
        # Time = latency + (data_size / bandwidth)
        bandwidth_bytes_per_s = self.bandwidth_tbps * 1e12
        transfer_time_s = self.latency_ns * 1e-9 + (data_size_bytes / bandwidth_bytes_per_s)
        return transfer_time_s

class Thread:
    def __init__(self, thread_id, core):
        self.thread_id = thread_id
        self.core = core
        self.active = True
        self.result = None

    def run(self, a, b, cin, opcode, reg_sel):
        if self.active:
            self.result = self.core.step(a, b, cin, opcode, reg_sel)
        return self.result

class Warp:
    def __init__(self, warp_id, threads):
        self.warp_id = warp_id
        self.threads = threads  # List of Thread objects
        self.active = True

    def run(self, a, b, cin, opcode, reg_sel):
        # All threads in a warp execute in lockstep (SIMT)
        return [thread.run(a, b, cin, opcode, reg_sel) for thread in self.threads if thread.active]

class WarpScheduler:
    def __init__(self, warps):
        self.warps = warps  # List of Warp objects
        self.schedule_ptr = 0

    def schedule(self):
        # Simple round-robin scheduler
        if not self.warps:
            return None
        warp = self.warps[self.schedule_ptr]
        self.schedule_ptr = (self.schedule_ptr + 1) % len(self.warps)
        return warp

class SharedMemory:
    def __init__(self, size):
        self.size = size
        self.mem = [0] * size

    def read(self, addr):
        return self.mem[addr % self.size]

    def write(self, addr, value):
        self.mem[addr % self.size] = value

    def read_matrix(self, addr, n, m):
        # Simulate reading an n x m matrix from shared memory
        # For simplicity, treat addr as row offset
        return [
            [self.mem[(addr + i * m + j) % self.size] for j in range(m)]
            for i in range(n)
        ]

class L1Cache:
    def __init__(self, size):
        self.size = size
        self.cache = [None] * size

    def read(self, addr):
        return self.cache[addr % self.size]

    def write(self, addr, value):
        self.cache[addr % self.size] = value


# GlobalMemory now uses RAMController and persists to .db
class GlobalMemory:
    def __init__(self, size_bytes, db_path=None):
        if db_path is None:
            import uuid
            db_path = os.path.join(os.path.dirname(__file__), f"global_mem_{uuid.uuid4().hex}.db")
        self.size_bytes = size_bytes
        self.ram = RAMController(size_bytes, db_path=db_path)
        self.allocated_address = 0 # Simple allocation pointer

    def read(self, addr, length=1):
        data = self.ram.read(addr, length)
        # Return as int for compatibility (simulate voltage)
        if length == 1:
            return int(data[0]) if data else 0
        return [int(b) for b in data]

    def write(self, addr, value):
        # Accepts int, float, or list/bytes
        if isinstance(value, (int, float)):
            data = bytes([int(value) & 0xFF])
        elif isinstance(value, (bytes, bytearray)):
            data = value
        elif isinstance(value, list):
            # Convert list of integers to bytes, assuming each integer is a byte value (0-255)
            data = bytes(value)
        else:
            raise TypeError("Unsupported value type for write")
        self.ram.write(addr, data)

    def read_matrix(self, addr, n, m):
        # Read n*m bytes and reshape
        data = self.ram.read(addr, n * m)
        return [list(data[i*m:(i+1)*m]) for i in range(n)]

    def allocate_space(self, size_bytes: int) -> int:
        """Simulates allocating space in global memory."""
        if self.allocated_address + size_bytes > self.size_bytes:
            raise MemoryError("Out of global memory space")
        allocated_addr = self.allocated_address
        self.allocated_address += size_bytes
        return allocated_addr


# StreamingMultiprocessor now only loads state from DB as needed
class StreamingMultiprocessor:
    def __init__(self, sm_id, chip_id, db: GPUStateDB, num_cores_per_sm=128, warps_per_sm=164, threads_per_warp=700, num_tensor_cores=8):
        self.sm_id = sm_id
        self.chip_id = chip_id
        self.db = db
        self.num_cores_per_sm = num_cores_per_sm
        self.warps_per_sm = warps_per_sm
        self.threads_per_warp = threads_per_warp
        self.num_tensor_cores = num_tensor_cores
        self.global_mem = None  # Will be set by GPUMemoryHierarchy

    def load_state(self):
        state = self.db.load_state("sm", "sm_id", self.sm_id)
        return state or {}

    def save_state(self, state):
        self.db.save_state("sm", "sm_id", self.sm_id, state)

    def attach_global_mem(self, global_mem):
        self.global_mem = global_mem

    def get_core(self, core_id):
        return Core(core_id, self.sm_id, self.db)

    def get_warp(self, warp_id):
        return WarpDB(warp_id, self.sm_id, self.db)

    def get_tensor_core(self, tensor_core_id):
        return TensorCoreDB(tensor_core_id, self.sm_id, self.db)

    def run_next_warp(self, a, b, cin, opcode, reg_sel):
        # Example: load warp 0, run, save
        warp = self.get_warp(0)
        result = warp.run(a, b, cin, opcode, reg_sel)
        return result

    def tensor_core_matmul(self, A, B, tensor_core_id=0):
        tensor_core = self.get_tensor_core(tensor_core_id)
        return tensor_core.matmul(A, B)

class Core:
    def __init__(self, core_id, sm_id, db: GPUStateDB):
        self.core_id = core_id
        self.sm_id = sm_id
        self.db = db

    def load_state(self):
        state = self.db.load_state("core", "core_id", self.core_id)
        return state or {}

    def save_state(self, state):
        self.db.save_state("core", "core_id", self.core_id, state)

    def step(self, a, b, cin, opcode, reg_sel):
        state = self.load_state()
        # Simulate a simple operation
        state["last_result"] = (a[0] + b[0] + cin) if opcode == 0b10 else 0.0
        self.save_state(state)
        return state["last_result"]

class WarpDB:
    def __init__(self, warp_id, sm_id, db: GPUStateDB, threads_per_warp=700):
        self.warp_id = warp_id
        self.sm_id = sm_id
        self.db = db
        self.threads_per_warp = threads_per_warp

    def load_state(self):
        state = self.db.load_state("warp", "warp_id", self.warp_id)
        return state or {}

    def save_state(self, state):
        self.db.save_state("warp", "warp_id", self.warp_id, state)

    def get_thread(self, thread_id):
        return ThreadDB(thread_id, self.warp_id, self.db)

    def run(self, a, b, cin, opcode, reg_sel):
        # For demo, run only first thread
        thread = self.get_thread(0)
        result = thread.run(a, b, cin, opcode, reg_sel)
        return [result]

class ThreadDB:
    def __init__(self, thread_id, warp_id, db: GPUStateDB):
        self.thread_id = thread_id
        self.warp_id = warp_id
        self.db = db

    def load_state(self):
        state = self.db.load_state("thread", "thread_id", self.thread_id)
        return state or {}

    def save_state(self, state):
        self.db.save_state("thread", "thread_id", self.thread_id, state)

    def run(self, a, b, cin, opcode, reg_sel):
        state = self.load_state()
        # Simulate a simple operation
        state["result"] = (a[0] + b[0] + cin) if opcode == 0b10 else 0.0
        self.save_state(state)
        return state["result"]

    def attach_global_mem(self, global_mem):
        self.global_mem = global_mem

    def run_next_warp(self, a, b, cin, opcode, reg_sel):
        warp = self.scheduler.schedule()
        if warp:
            return warp.run(a, b, cin, opcode, reg_sel)
        return None

    def tensor_core_matmul(self, A, B):
        return self.tensor_cores.matmul(A, B)

    def tensor_core_matmul_from_memory(self, srcA, addrA, srcB, addrB, shapeA, shapeB):
        return self.tensor_cores.matmul_from_memory(srcA, addrA, srcB, addrB, shapeA, shapeB)

    def read_register_matrix(self, addr, n, m):
        # Simulate reading an n x m matrix from registers
        # For simplicity, treat addr as row offset
        return [
            [self.register_file[(addr + i) % len(self.register_file)][(j) % len(self.register_file[0])] for j in range(m)]
            for i in range(n)
        ]



class GPUMemoryHierarchy:
    def __init__(self, num_sms, global_mem_size_bytes, chip_id, db: GPUStateDB):
        self.global_mem = GlobalMemory(global_mem_size_bytes)
        self.sm_ids = list(range(num_sms))
        self.chip_id = chip_id
        self.db = db
        self.num_sms = num_sms

    def add_sm(self, sm):
        sm.attach_global_mem(self.global_mem)

    def read_global(self, addr):
        return self.global_mem.read(addr)

    def write_global(self, addr, value):
        self.global_mem.write(addr, value)




class Chip:
    def __init__(self, chip_id, num_sms=1500, vram_size_gb=16, db_path="gpu_state.db"):
        self.chip_id = chip_id
        self.db = GPUStateDB(db_path)
        global_mem_size_bytes = vram_size_gb * 1024 * 1024 * 1024
        self.gpu_mem = GPUMemoryHierarchy(num_sms=num_sms, global_mem_size_bytes=global_mem_size_bytes, chip_id=chip_id, db=self.db)
        self.sm_ids = list(range(num_sms))
        self.connected_chips = []
        self.ai_accelerator = AIAccelerator() # Instantiate AIAccelerator
        self.custom_vram = CustomVRAM(self.gpu_mem.global_mem) # Create CustomVRAM instance
        self.ai_accelerator.set_vram(self.custom_vram) # Set VRAM for AIAccelerator

    def get_sm(self, sm_id):
        return StreamingMultiprocessor(sm_id, self.chip_id, self.db)

    def connect_chip(self, other_chip, interconnect):
        self.connected_chips.append((other_chip, interconnect))

    def close(self):
        if hasattr(self, "db") and self.db:
            self.db.close()
        if hasattr(self, "gpu_mem") and hasattr(self.gpu_mem, "global_mem") and hasattr(self.gpu_mem.global_mem, "ram"):
            self.gpu_mem.global_mem.ram.close()


if __name__ == "__main__":
    print("\n--- Multi-Chip GPU Simulation (DB-backed) ---")
    num_chips = 10
    vram_size_gb = 16
    chips = [Chip(
        chip_id=i,
        num_sms=100,
        vram_size_gb=vram_size_gb,
        db_path=f"gpu_state_chip_{i}.db"
    ) for i in range(num_chips)]
    print(f"Total chips: {len(chips)}")
    optical_link = OpticalInterconnect(bandwidth_tbps=800, latency_ns=1)
    for i in range(num_chips):
        chips[i].connect_chip(chips[(i+1)%num_chips], optical_link)
    for chip in chips:
        sm = chip.get_sm(0)
        results = sm.run_next_warp([0.7, 0.0], [0.7, 0.7], 0.0, 0b10, 0)
        print(f"Chip {chip.chip_id} SM 0 first thread result: {results[0] if results else None}")
        # Example tensor core usage: matrix multiply on SM 0, tensor core 0
        A = [[1.0, 2.0], [3.0, 4.0]]
        B = [[5.0, 6.0], [7.0, 8.0]]
        tc_result = sm.tensor_core_matmul(A, B, tensor_core_id=0)
        print(f"Chip {chip.chip_id} SM 0 tensor core 0 matmul result: {tc_result}")
    print(f"Total SMs in first chip: {len(chips[0].sm_ids)}")
    print(f"Global memory size in first chip: {chips[0].gpu_mem.global_mem.size_bytes} bytes (backed by .db)")
    chips[0].send_data(chips[1], optical_link, 1024*1024*1024*10)