mirror of
https://github.com/data61/MP-SPDZ.git
synced 2026-01-08 21:18:03 -05:00
658 lines
27 KiB
Python
658 lines
27 KiB
Python
import itertools, time
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from collections import defaultdict, deque
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from Compiler.exceptions import *
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from Compiler.config import *
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from Compiler.instructions import *
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from Compiler.instructions_base import *
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from Compiler.util import *
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import Compiler.graph
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import Compiler.program
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import heapq, itertools
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import operator
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import sys
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from functools import reduce
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class BlockAllocator:
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""" Manages freed memory blocks. """
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def __init__(self):
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self.by_logsize = [defaultdict(set) for i in range(64)]
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self.by_address = {}
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def by_size(self, size):
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if size >= 2 ** 64:
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raise CompilerError('size exceeds addressing capability')
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return self.by_logsize[int(math.log(size, 2))][size]
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def push(self, address, size):
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end = address + size
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if end in self.by_address:
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next_size = self.by_address.pop(end)
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self.by_size(next_size).remove(end)
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size += next_size
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self.by_size(size).add(address)
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self.by_address[address] = size
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def pop(self, size):
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if len(self.by_size(size)) > 0:
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block_size = size
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else:
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logsize = int(math.log(size, 2))
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for block_size, addresses in self.by_logsize[logsize].items():
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if block_size >= size and len(addresses) > 0:
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break
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else:
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done = False
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for x in self.by_logsize[logsize + 1:]:
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for block_size, addresses in x.items():
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if len(addresses) > 0:
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done = True
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break
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if done:
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break
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else:
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block_size = 0
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if block_size >= size:
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addr = self.by_size(block_size).pop()
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del self.by_address[addr]
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diff = block_size - size
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if diff:
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self.by_size(diff).add(addr + size)
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self.by_address[addr + size] = diff
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return addr
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class StraightlineAllocator:
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"""Allocate variables in a straightline program using n registers.
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It is based on the precondition that every register is only defined once."""
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def __init__(self, n, program):
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self.alloc = dict_by_id()
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self.usage = Compiler.program.RegType.create_dict(lambda: 0)
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self.defined = dict_by_id()
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self.dealloc = set_by_id()
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self.n = n
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self.program = program
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def alloc_reg(self, reg, free):
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base = reg.vectorbase
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if base in self.alloc:
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# already allocated
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return
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reg_type = reg.reg_type
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size = base.size
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if free[reg_type, size]:
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res = free[reg_type, size].pop()
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else:
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if self.usage[reg_type] < self.n:
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res = self.usage[reg_type]
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self.usage[reg_type] += size
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else:
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raise RegisterOverflowError()
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self.alloc[base] = res
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base.i = self.alloc[base]
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for dup in base.duplicates:
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dup = dup.vectorbase
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self.alloc[dup] = self.alloc[base]
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dup.i = self.alloc[base]
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def dealloc_reg(self, reg, inst, free):
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if reg.vector:
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self.dealloc |= reg.vector
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else:
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self.dealloc.add(reg)
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reg.duplicates.remove(reg)
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base = reg.vectorbase
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seen = set_by_id()
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to_check = set_by_id()
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to_check.add(base)
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while to_check:
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dup = to_check.pop()
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if dup not in seen:
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seen.add(dup)
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base = dup.vectorbase
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if base.vector:
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for i in base.vector:
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if i not in self.dealloc:
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# not all vector elements ready for deallocation
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return
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if len(i.duplicates) > 1:
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for x in i.duplicates:
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to_check.add(x)
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else:
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if base not in self.dealloc:
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return
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for x in itertools.chain(dup.duplicates, base.duplicates):
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to_check.add(x)
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free[reg.reg_type, base.size].append(self.alloc[base])
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if inst.is_vec() and base.vector:
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self.defined[base] = inst
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for i in base.vector:
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self.defined[i] = inst
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else:
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self.defined[reg] = inst
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def process(self, program, alloc_pool):
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for k,i in enumerate(reversed(program)):
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unused_regs = []
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for j in i.get_def():
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if j.vectorbase in self.alloc:
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if j in self.defined:
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raise CompilerError("Double write on register %s " \
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"assigned by '%s' in %s" % \
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(j,i,format_trace(i.caller)))
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else:
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# unused register
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self.alloc_reg(j, alloc_pool)
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unused_regs.append(j)
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if unused_regs and len(unused_regs) == len(list(i.get_def())) and \
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self.program.verbose:
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# only report if all assigned registers are unused
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print("Register(s) %s never used, assigned by '%s' in %s" % \
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(unused_regs,i,format_trace(i.caller)))
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for j in i.get_used():
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self.alloc_reg(j, alloc_pool)
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for j in i.get_def():
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self.dealloc_reg(j, i, alloc_pool)
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if k % 1000000 == 0 and k > 0:
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print("Allocated registers for %d instructions at" % k, time.asctime())
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# print "Successfully allocated registers"
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# print "modp usage: %d clear, %d secret" % \
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# (self.usage[Compiler.program.RegType.ClearModp], self.usage[Compiler.program.RegType.SecretModp])
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# print "GF2N usage: %d clear, %d secret" % \
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# (self.usage[Compiler.program.RegType.ClearGF2N], self.usage[Compiler.program.RegType.SecretGF2N])
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return self.usage
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def finalize(self, options):
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for reg in self.alloc:
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for x in reg.get_all():
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if x not in self.dealloc and reg not in self.dealloc \
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and len(x.duplicates) == 0:
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print('Warning: read before write at register', x)
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print('\tregister trace: %s' % format_trace(x.caller,
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'\t\t'))
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if options.stop:
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sys.exit(1)
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def determine_scope(block, options):
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last_def = defaultdict_by_id(lambda: -1)
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used_from_scope = set_by_id()
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def read(reg, n):
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for dup in reg.duplicates:
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if last_def[dup] == -1:
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dup.can_eliminate = False
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used_from_scope.add(dup)
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def write(reg, n):
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if last_def[reg] != -1:
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print('Warning: double write at register', reg)
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print('\tline %d: %s' % (n, instr))
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print('\ttrace: %s' % format_trace(instr.caller, '\t\t'))
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if options.stop:
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sys.exit(1)
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last_def[reg] = n
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for n,instr in enumerate(block.instructions):
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outputs,inputs = instr.get_def(), instr.get_used()
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for reg in inputs:
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if reg.vector and instr.is_vec():
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for i in reg.vector:
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read(i, n)
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else:
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read(reg, n)
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for reg in outputs:
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if reg.vector and instr.is_vec():
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for i in reg.vector:
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write(i, n)
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else:
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write(reg, n)
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block.used_from_scope = used_from_scope
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class Merger:
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def __init__(self, block, options, merge_classes):
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self.block = block
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self.instructions = block.instructions
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self.options = options
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if options.max_parallel_open:
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self.max_parallel_open = int(options.max_parallel_open)
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else:
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self.max_parallel_open = float('inf')
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self.counter = defaultdict(lambda: 0)
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self.rounds = defaultdict(lambda: 0)
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self.dependency_graph(merge_classes)
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def do_merge(self, merges_iter):
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""" Merge an iterable of nodes in G, returning the number of merged
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instructions and the index of the merged instruction. """
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# sort merges, necessary for inputb
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merge = list(merges_iter)
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merge.sort()
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merges_iter = iter(merge)
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instructions = self.instructions
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mergecount = 0
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try:
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n = next(merges_iter)
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except StopIteration:
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return mergecount, None
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for i in merges_iter:
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instructions[n].merge(instructions[i])
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instructions[i] = None
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self.merge_nodes(n, i)
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mergecount += 1
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return mergecount, n
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def longest_paths_merge(self):
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""" Attempt to merge instructions of type instruction_type (which are given in
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merge_nodes) using longest paths algorithm.
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Returns the no. of rounds of communication required after merging (assuming 1 round/instruction).
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Doesn't use networkx.
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"""
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G = self.G
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instructions = self.instructions
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merge_nodes = self.open_nodes
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depths = self.depths
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self.req_num = defaultdict(lambda: 0)
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if not merge_nodes:
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return 0
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# merge opens at same depth
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merges = defaultdict(list)
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for node in merge_nodes:
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merges[depths[node]].append(node)
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# after merging, the first element in merges[i] remains for each depth i,
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# all others are removed from instructions and G
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last_nodes = [None, None]
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for i in sorted(merges):
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merge = merges[i]
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t = type(self.instructions[merge[0]])
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self.counter[t] += len(merge)
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self.rounds[t] += 1
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if len(merge) > 10000:
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print('Merging %d %s in round %d/%d' % \
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(len(merge), t.__name__, i, len(merges)))
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self.do_merge(merge)
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self.req_num[t.__name__, 'round'] += 1
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preorder = None
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if len(instructions) > 1000000:
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print("Topological sort ...")
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order = Compiler.graph.topological_sort(G, preorder)
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instructions[:] = [instructions[i] for i in order if instructions[i] is not None]
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if len(instructions) > 1000000:
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print("Done at", time.asctime())
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return len(merges)
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def dependency_graph(self, merge_classes):
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""" Create the program dependency graph. """
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block = self.block
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options = self.options
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open_nodes = set()
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self.open_nodes = open_nodes
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colordict = defaultdict(lambda: 'gray', asm_open='red',\
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ldi='lightblue', ldm='lightblue', stm='blue',\
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mov='yellow', mulm='orange', mulc='orange',\
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triple='green', square='green', bit='green',\
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asm_input='lightgreen')
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G = Compiler.graph.SparseDiGraph(len(block.instructions))
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self.G = G
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reg_nodes = {}
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last_def = defaultdict_by_id(lambda: -1)
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last_read = defaultdict_by_id(lambda: -1)
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last_mem_write = []
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last_mem_read = []
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last_mem_write_of = defaultdict(list)
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last_mem_read_of = defaultdict(list)
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last_print_str = None
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last = defaultdict(lambda: defaultdict(lambda: None))
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last_open = deque()
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last_input = defaultdict(lambda: [None, None])
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depths = [0] * len(block.instructions)
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self.depths = depths
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parallel_open = defaultdict(lambda: 0)
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next_available_depth = {}
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self.sources = []
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self.real_depths = [0] * len(block.instructions)
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round_type = {}
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def add_edge(i, j):
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G.add_edge(i, j)
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for d in (self.depths, self.real_depths):
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if d[j] < d[i]:
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d[j] = d[i]
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def read(reg, n):
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for dup in reg.duplicates:
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if last_def[dup] not in (-1, n):
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add_edge(last_def[dup], n)
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last_read[reg] = n
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def write(reg, n):
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for dup in reg.duplicates:
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if last_read[dup] not in (-1, n):
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add_edge(last_read[dup], n)
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if id(dup) in [id(x) for x in block.instructions[n].get_used()] and \
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last_read[dup] not in (-1, n):
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add_edge(last_read[dup], n)
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last_def[reg] = n
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def handle_mem_access(addr, reg_type, last_access_this_kind,
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last_access_other_kind):
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this = last_access_this_kind[str(addr),reg_type]
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other = last_access_other_kind[str(addr),reg_type]
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if this and other:
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if this[-1] < other[0]:
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del this[:]
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this.append(n)
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for inst in other:
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add_edge(inst, n)
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def mem_access(n, instr, last_access_this_kind, last_access_other_kind):
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addr = instr.args[1]
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reg_type = instr.args[0].reg_type
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if isinstance(addr, int):
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for i in range(min(instr.get_size(), 100)):
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addr_i = addr + i
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handle_mem_access(addr_i, reg_type, last_access_this_kind,
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last_access_other_kind)
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if block.warn_about_mem and \
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not block.parent.warned_about_mem and \
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(instr.get_size() > 100) and not instr._protect:
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print('WARNING: Order of memory instructions ' \
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'not preserved due to long vector, errors possible')
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block.parent.warned_about_mem = True
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else:
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handle_mem_access(addr, reg_type, last_access_this_kind,
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last_access_other_kind)
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if block.warn_about_mem and \
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not block.parent.warned_about_mem and \
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not isinstance(instr, DirectMemoryInstruction) and \
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not instr._protect:
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print('WARNING: Order of memory instructions ' \
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'not preserved, errors possible')
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block.parent.warned_about_mem = True
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def strict_mem_access(n, last_this_kind, last_other_kind):
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if last_other_kind and last_this_kind and \
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last_other_kind[-1] > last_this_kind[-1]:
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last_this_kind[:] = []
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last_this_kind.append(n)
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for i in last_other_kind:
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add_edge(i, n)
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def keep_order(instr, n, t, arg_index=None):
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if arg_index is None:
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player = None
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else:
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player = instr.args[arg_index]
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if last[t][player] is not None:
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add_edge(last[t][player], n)
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last[t][player] = n
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def keep_merged_order(instr, n, t):
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if last_input[t][0] is not None:
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if instr.merge_id() != \
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block.instructions[last_input[t][0]].merge_id():
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add_edge(last_input[t][0], n)
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last_input[t][1] = last_input[t][0]
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elif last_input[t][1] is not None:
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add_edge(last_input[t][1], n)
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last_input[t][0] = n
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def keep_text_order(inst, n):
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if inst.get_players() is None:
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# switch
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for x in list(last_input.keys()):
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if isinstance(x, int):
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add_edge(last_input[x][0], n)
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del last_input[x]
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keep_merged_order(instr, n, None)
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elif last_input[None][0] is not None:
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keep_merged_order(instr, n, None)
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else:
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for player in inst.get_players():
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keep_merged_order(instr, n, player)
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for n,instr in enumerate(block.instructions):
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outputs,inputs = instr.get_def(), instr.get_used()
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G.add_node(n)
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# if options.debug:
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# col = colordict[instr.__class__.__name__]
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# G.add_node(n, color=col, label=str(instr))
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for reg in outputs:
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if reg.vector and instr.is_vec():
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for i in reg.vector:
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write(i, n)
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else:
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write(reg, n)
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for reg in inputs:
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if reg.vector and instr.is_vec():
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for i in reg.vector:
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read(i, n)
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else:
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read(reg, n)
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# will be merged
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if isinstance(instr, TextInputInstruction):
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keep_text_order(instr, n)
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elif isinstance(instr, RawInputInstruction):
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keep_merged_order(instr, n, RawInputInstruction)
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if isinstance(instr, merge_classes):
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open_nodes.add(n)
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G.add_node(n, merges=[])
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# the following must happen after adding the edge
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self.real_depths[n] += 1
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depth = depths[n] + 1
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# find first depth that has the right type and isn't full
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skipped_depths = set()
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while (depth in round_type and \
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round_type[depth] != instr.merge_id()) or \
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(int(options.max_parallel_open) > 0 and \
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parallel_open[depth] >= int(options.max_parallel_open)):
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skipped_depths.add(depth)
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depth = next_available_depth.get((type(instr), depth), \
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depth + 1)
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for d in skipped_depths:
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next_available_depth[type(instr), d] = depth
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round_type[depth] = instr.merge_id()
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if int(options.max_parallel_open) > 0:
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parallel_open[depth] += len(instr.args) * instr.get_size()
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depths[n] = depth
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if isinstance(instr, ReadMemoryInstruction):
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if options.preserve_mem_order or instr._protect:
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strict_mem_access(n, last_mem_read, last_mem_write)
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elif not options.preserve_mem_order:
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mem_access(n, instr, last_mem_read_of, last_mem_write_of)
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elif isinstance(instr, WriteMemoryInstruction):
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if options.preserve_mem_order or instr._protect:
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strict_mem_access(n, last_mem_write, last_mem_read)
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elif not options.preserve_mem_order:
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mem_access(n, instr, last_mem_write_of, last_mem_read_of)
|
|
elif isinstance(instr, matmulsm):
|
|
if options.preserve_mem_order:
|
|
strict_mem_access(n, last_mem_read, last_mem_write)
|
|
else:
|
|
for i in last_mem_write_of.values():
|
|
for j in i:
|
|
add_edge(j, n)
|
|
# keep I/O instructions in order
|
|
elif isinstance(instr, IOInstruction):
|
|
if last_print_str is not None:
|
|
add_edge(last_print_str, n)
|
|
last_print_str = n
|
|
elif isinstance(instr, PublicFileIOInstruction):
|
|
keep_order(instr, n, PublicFileIOInstruction)
|
|
elif isinstance(instr, prep_class):
|
|
keep_order(instr, n, instr.args[0])
|
|
elif isinstance(instr, StackInstruction):
|
|
keep_order(instr, n, StackInstruction)
|
|
|
|
if not G.pred[n]:
|
|
self.sources.append(n)
|
|
|
|
if n % 1000000 == 0 and n > 0:
|
|
print("Processed dependency of %d/%d instructions at" % \
|
|
(n, len(block.instructions)), time.asctime())
|
|
|
|
def merge_nodes(self, i, j):
|
|
""" Merge node j into i, removing node j """
|
|
G = self.G
|
|
if j in G[i]:
|
|
G.remove_edge(i, j)
|
|
if i in G[j]:
|
|
G.remove_edge(j, i)
|
|
G.add_edges_from(list(zip(itertools.cycle([i]), G[j], [G.weights[(j,k)] for k in G[j]])))
|
|
G.add_edges_from(list(zip(G.pred[j], itertools.cycle([i]), [G.weights[(k,j)] for k in G.pred[j]])))
|
|
G.get_attr(i, 'merges').append(j)
|
|
G.remove_node(j)
|
|
|
|
def eliminate_dead_code(self):
|
|
instructions = self.instructions
|
|
G = self.G
|
|
merge_nodes = self.open_nodes
|
|
count = 0
|
|
open_count = 0
|
|
stats = defaultdict(lambda: 0)
|
|
for i,inst in zip(range(len(instructions) - 1, -1, -1), reversed(instructions)):
|
|
if inst is None:
|
|
continue
|
|
can_eliminate_defs = True
|
|
for reg in inst.get_def():
|
|
for dup in reg.duplicates:
|
|
if not (dup.can_eliminate and reduce(
|
|
operator.and_,
|
|
(x.can_eliminate for x in dup.vector), True)):
|
|
can_eliminate_defs = False
|
|
break
|
|
# remove if instruction has result that isn't used
|
|
unused_result = not G.degree(i) and len(list(inst.get_def())) \
|
|
and can_eliminate_defs \
|
|
and not isinstance(inst, (DoNotEliminateInstruction))
|
|
def eliminate(i):
|
|
G.remove_node(i)
|
|
merge_nodes.discard(i)
|
|
stats[type(instructions[i]).__name__] += 1
|
|
instructions[i] = None
|
|
if unused_result:
|
|
eliminate(i)
|
|
count += 1
|
|
if count > 0 and self.block.parent.program.verbose:
|
|
print('Eliminated %d dead instructions, among which %d opens: %s' \
|
|
% (count, open_count, dict(stats)))
|
|
|
|
def print_graph(self, filename):
|
|
f = open(filename, 'w')
|
|
print('digraph G {', file=f)
|
|
for i in range(self.G.n):
|
|
for j in self.G[i]:
|
|
print('"%d: %s" -> "%d: %s";' % \
|
|
(i, self.instructions[i], j, self.instructions[j]), file=f)
|
|
print('}', file=f)
|
|
f.close()
|
|
|
|
def print_depth(self, filename):
|
|
f = open(filename, 'w')
|
|
for i in range(self.G.n):
|
|
print('%d: %s' % (self.depths[i], self.instructions[i]), file=f)
|
|
f.close()
|
|
|
|
class RegintOptimizer:
|
|
def __init__(self):
|
|
self.cache = util.dict_by_id()
|
|
self.offset_cache = util.dict_by_id()
|
|
self.rev_offset_cache = {}
|
|
|
|
def add_offset(self, res, new_base, new_offset):
|
|
self.offset_cache[res] = new_base, new_offset
|
|
if (new_base.i, new_offset) not in self.rev_offset_cache:
|
|
self.rev_offset_cache[new_base.i, new_offset] = res
|
|
|
|
def run(self, instructions, program):
|
|
for i, inst in enumerate(instructions):
|
|
if isinstance(inst, ldint_class):
|
|
self.cache[inst.args[0]] = inst.args[1]
|
|
elif isinstance(inst, IntegerInstruction):
|
|
if inst.args[1] in self.cache and inst.args[2] in self.cache:
|
|
res = inst.op(self.cache[inst.args[1]],
|
|
self.cache[inst.args[2]])
|
|
if abs(res) < 2 ** 31:
|
|
self.cache[inst.args[0]] = res
|
|
instructions[i] = ldint(inst.args[0], res,
|
|
add_to_prog=False)
|
|
elif isinstance(inst, addint_class):
|
|
def f(base, delta_reg):
|
|
delta = self.cache[delta_reg]
|
|
if base in self.offset_cache:
|
|
reg, offset = self.offset_cache[base]
|
|
new_base, new_offset = reg, offset + delta
|
|
else:
|
|
new_base, new_offset = base, delta
|
|
self.add_offset(inst.args[0], new_base, new_offset)
|
|
if inst.args[1] in self.cache:
|
|
f(inst.args[2], inst.args[1])
|
|
elif inst.args[2] in self.cache:
|
|
f(inst.args[1], inst.args[2])
|
|
elif isinstance(inst, subint_class) and \
|
|
inst.args[2] in self.cache:
|
|
delta = self.cache[inst.args[2]]
|
|
if inst.args[1] in self.offset_cache:
|
|
reg, offset = self.offset_cache[inst.args[1]]
|
|
new_base, new_offset = reg, offset - delta
|
|
else:
|
|
new_base, new_offset = inst.args[1], -delta
|
|
self.add_offset(inst.args[0], new_base, new_offset)
|
|
elif isinstance(inst, IndirectMemoryInstruction):
|
|
if inst.args[1] in self.cache:
|
|
instructions[i] = inst.get_direct(self.cache[inst.args[1]])
|
|
instructions[i]._protect = inst._protect
|
|
elif inst.args[1] in self.offset_cache:
|
|
base, offset = self.offset_cache[inst.args[1]]
|
|
addr = self.rev_offset_cache[base.i, offset]
|
|
inst.args[1] = addr
|
|
elif type(inst) == convint_class:
|
|
if inst.args[1] in self.cache:
|
|
res = self.cache[inst.args[1]]
|
|
self.cache[inst.args[0]] = res
|
|
if abs(res) < 2 ** 31:
|
|
instructions[i] = ldi(inst.args[0], res,
|
|
add_to_prog=False)
|
|
elif isinstance(inst, mulm_class):
|
|
if inst.args[2] in self.cache:
|
|
op = self.cache[inst.args[2]]
|
|
if op == 0:
|
|
instructions[i] = ldsi(inst.args[0], 0,
|
|
add_to_prog=False)
|
|
elif isinstance(inst, (crash, cond_print_str, cond_print_plain)):
|
|
if inst.args[0] in self.cache:
|
|
cond = self.cache[inst.args[0]]
|
|
if not cond:
|
|
instructions[i] = None
|
|
pre = len(instructions)
|
|
instructions[:] = list(filter(lambda x: x is not None, instructions))
|
|
post = len(instructions)
|
|
if pre != post and program.options.verbose:
|
|
print('regint optimizer removed %d instructions' % (pre - post))
|