/
chimera_pipeline_rank.py
217 lines (185 loc) · 9.6 KB
/
chimera_pipeline_rank.py
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class AutoGeneratePipelineRank:
def __init__(self, stage_numbers, divisors, micro_batch_numbers):
self.module_to_stage_map = [i for i in range(stage_numbers)]
self.stage_numbers = stage_numbers
assert divisors % 2 == 0, "pipeline num must be an even number"
self.pipeline_numbers = 1 if divisors is None else divisors//2
self.micro_batch_numbers = micro_batch_numbers
self.push_pipeline_numbers = {
"up": 0,
"down": 0
}
self.push_micro_batch = 0
def generate_pipeline(self):
self.up_pipline_list = []
self.down_pipeline_list = []
for i in range(self.pipeline_numbers):
# generate up pipeline
micro_num = self.stage_numbers//(2*self.pipeline_numbers)
if self.micro_batch_numbers-self.push_micro_batch <= micro_num:
micro_num = self.micro_batch_numbers-self.push_micro_batch
self.push_micro_batch += micro_num
self.up_pipline_list.append(MyPipeLine(i,
micro_num, self.stage_numbers,
self.pipeline_numbers, self.module_to_stage_map, True))
if self.micro_batch_numbers-self.push_micro_batch <= micro_num:
micro_num = self.micro_batch_numbers-self.push_micro_batch
self.push_micro_batch += micro_num
# generate down pipeline
self.down_pipeline_list.append(MyPipeLine(i,
micro_num, self.stage_numbers,
self.pipeline_numbers, self.module_to_stage_map, False))
def get_schedule(self, is_iteration=False):
schedule = []
schedule_up_down = []
pipelines = self.up_pipline_list + self.down_pipeline_list
for i in range(self.stage_numbers):
schedule.append(list())
schedule_up_down.append(list())
has_next_flag = True
has_next_sync = 0
steps = 0
sync_list = [[] for i in range(self.stage_numbers)]
while(has_next_flag or has_next_sync != 0):
next_flag = False
sub_schedule = list("" for _ in range(self.stage_numbers))
for index, pipeline in enumerate(pipelines):
if pipeline.has_next_pass():
next_data, is_pop, step_direction, up_or_down, is_sync = pipeline.next_pass()
for k in next_data.keys():
schedule[next_data[k] %
self.stage_numbers].append(str(k))
up_or_down_str = str(index)
up_or_down_str += "@down@" if up_or_down else "@up@"
schedule_up_down[next_data[k] %
self.stage_numbers].append(f"{up_or_down_str}{'f' if step_direction[k] == 1 else 'b'}")
if step_direction.get(pipeline.micro_batch_ids[-1], 1) != 1:
direction = "down"
if pipeline.up_or_down:
direction = "up"
sub_schedule[next_data[k] %
self.stage_numbers] = f"{up_or_down_str}{'f' if step_direction[k] == 1 else 'b'}"
if is_sync and next_data.get(pipeline.micro_batch_ids[-1]) is not None:
has_next_sync += 1
sync_list[next_data[pipeline.micro_batch_ids[-1]] %
self.stage_numbers].append(f"{up_or_down_str}s")
if is_pop and pipeline.has_next_pass():
micro_num = self.stage_numbers//(2 *
self.pipeline_numbers)
if self.micro_batch_numbers-self.push_micro_batch <= micro_num:
micro_num = self.micro_batch_numbers-self.push_micro_batch
self.push_micro_batch += micro_num
if micro_num != 0:
if pipeline.up_or_down:
direction = "up"
else:
direction = "down"
pipelines.append(MyPipeLine(self.pipeline_numbers+self.push_pipeline_numbers[direction],
micro_num, self.stage_numbers,
self.pipeline_numbers, self.module_to_stage_map, pipeline.up_or_down))
self.push_pipeline_numbers[direction] += 1
next_flag = True
for index, s in enumerate(sub_schedule):
if s == "" and len(sync_list[index]) > 0:
sub_schedule[index] = sync_list[index].pop(0)
has_next_sync -= 1
for i in range(self.stage_numbers):
if len(schedule[i]) <= steps:
schedule[i].append(sub_schedule[i])
schedule_up_down[i].append(sub_schedule[i])
steps += 1
has_next_flag = next_flag
if is_iteration and has_next_flag:
yield sub_schedule
class MyPipeLine:
def __init__(self, pipeline_id, micro_batch_numbers,
stage_numbers, pipeline_numbers, module_to_stage_map, up_or_down):
self.pipeline_id = pipeline_id
self.micro_batch_numbers = micro_batch_numbers
self.stage_to_rank_map = None
self.pipeline_numbers = pipeline_numbers
self.stage_numbers = stage_numbers
self.module_to_stage_map = module_to_stage_map
self.up_or_down = up_or_down
self.devices = None
self.steps = -1
self.step_direction = dict()
self.micro_batch_ids = list()
self.micro_batch_device = dict()
micro_batch_id = ((self.pipeline_id//2)*self.stage_numbers)
micro_batch_id += (0 if self.up_or_down else self.stage_numbers//2)
for x in range(self.micro_batch_numbers):
self.micro_batch_ids.append(
x+(self.pipeline_id % self.pipeline_numbers)*(self.stage_numbers//self.pipeline_numbers//2)+micro_batch_id)
start_stage_device = (self.pipeline_id % self.pipeline_numbers) * \
(self.stage_numbers // self.pipeline_numbers)
self.devices = [x for x in self.module_to_stage_map[start_stage_device:] +
self.module_to_stage_map[:start_stage_device]]
if self.up_or_down is True:
# down pipeline
self.stage_to_rank_map = {
str(index): [device] for index, device in enumerate(self.devices)}
else:
# up pipeline
self.stage_to_rank_map = {
str(self.stage_numbers-1-index): [device] for index, device in enumerate(self.devices)}
def next_pass(self):
if self.steps <= (self.micro_batch_numbers-1) * 2:
self.steps += 1
over_back_micro_batch = []
for micro_batch in self.micro_batch_device.keys():
step = 1 if self.up_or_down else -1
if self.step_direction[micro_batch] == 1 and abs(self.micro_batch_device[micro_batch] - (self.stage_to_rank_map["0"][0] + 2*self.stage_numbers)) >= self.stage_numbers-1:
self.step_direction[micro_batch] = -1
elif self.step_direction[micro_batch] == -1 and self.micro_batch_device[micro_batch] == self.stage_to_rank_map["0"][0] + 2*self.stage_numbers:
over_back_micro_batch.append(micro_batch)
else:
self.micro_batch_device[micro_batch] += step * \
self.step_direction[micro_batch]
pop_one = False
for micro_batch in over_back_micro_batch:
self.micro_batch_device.pop(micro_batch)
pop_one = True
if self.steps % 2 == 0:
self.micro_batch_device[self.micro_batch_ids[self.steps //
2]] = self.stage_to_rank_map["0"][0] + 2*self.stage_numbers
self.step_direction[self.micro_batch_ids[self.steps // 2]] = 1
is_sync = True if self.step_direction.get(
self.micro_batch_ids[-1]) == -1 else False
return self.micro_batch_device, pop_one, self.step_direction, self.up_or_down, is_sync
def has_next_pass(self):
if self.micro_batch_numbers > 0 and (self.steps == -1 or self.micro_batch_device):
return True
return False
# ##########################测试用
def forward(up_or_down):
print(f"forward:{up_or_down}")
def backward(up_or_down):
print(f"backward:{up_or_down}")
if __name__ == "__main__":
stage_num = 8
pipeline_num = 2
micro_num = 8
print(
f"stage:{stage_num} pipeline_num:{pipeline_num} micro_num:{micro_num}")
pipeline = AutoGeneratePipelineRank(stage_num, pipeline_num, micro_num)
pipeline.generate_pipeline()
stage_to_ranks = [[] for i in range(stage_num)]
for pipe in pipeline.down_pipeline_list:
for k, v in pipe.stage_to_rank_map.items():
stage_to_ranks[int(k)].append(*v)
for pipe in pipeline.up_pipline_list:
for k, v in pipe.stage_to_rank_map.items():
stage_to_ranks[int(k)].append(*v)
s = pipeline.get_schedule(True)
for sub_schedule in s:
if sub_schedule[0] != '':
up_down, forward_backward = sub_schedule[0].split(
"@")
if forward_backward == 'f':
forward(up_down)
else:
backward(up_down)
else:
print("")
pass