251 lines
8.9 KiB
Python
251 lines
8.9 KiB
Python
import json
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import random
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import re
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import unittest
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from concurrent.futures import ThreadPoolExecutor
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import requests
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from sglang.srt.utils import kill_process_tree
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from sglang.test.ci.ci_register import register_amd_ci, register_cuda_ci
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from sglang.test.test_utils import (
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DEFAULT_SMALL_MODEL_NAME_FOR_TEST,
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DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
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DEFAULT_URL_FOR_TEST,
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CustomTestCase,
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popen_launch_server,
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)
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register_cuda_ci(est_time=82, suite="stage-b-test-small-1-gpu")
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register_amd_ci(est_time=82, suite="stage-b-test-small-1-gpu-amd")
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class TestPenalty(CustomTestCase):
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@classmethod
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def setUpClass(cls):
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cls.model = DEFAULT_SMALL_MODEL_NAME_FOR_TEST
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cls.base_url = DEFAULT_URL_FOR_TEST
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cls.process = popen_launch_server(
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cls.model,
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cls.base_url,
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timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
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)
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@classmethod
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def tearDownClass(cls):
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kill_process_tree(cls.process.pid)
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def run_decode(self, sampling_params):
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"""Helper method for basic decode tests."""
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return_logprob = True
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top_logprobs_num = 5
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return_text = True
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n = 1
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response = requests.post(
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self.base_url + "/generate",
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json={
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# prompt that is supposed to generate < 32 tokens
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"text": "<|start_header_id|>user<|end_header_id|>\n\nWhat is the answer for 1 + 1 = ?<|eot_id|><|start_header_id|>assistant<|end_header_id|>\n\n",
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"sampling_params": {
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"max_new_tokens": 48,
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"n": n,
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**sampling_params,
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},
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"return_logprob": return_logprob,
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"top_logprobs_num": top_logprobs_num,
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"return_text_in_logprobs": return_text,
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"logprob_start_len": 0,
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},
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)
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self.assertEqual(response.status_code, 200)
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print(json.dumps(response.json()))
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print("=" * 100)
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def run_generate_with_prompt(self, prompt, sampling_params, max_tokens=100):
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"""Helper method to generate text with a specific prompt and parameters."""
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sampling_params.setdefault("temperature", 0.05)
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sampling_params.setdefault("top_p", 1.0)
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response = requests.post(
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self.base_url + "/v1/chat/completions",
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json={
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"model": self.model,
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"messages": [{"role": "user", "content": prompt}],
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"max_tokens": max_tokens,
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**sampling_params,
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},
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)
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self.assertEqual(response.status_code, 200)
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result = response.json()
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content = result["choices"][0]["message"]["content"]
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return content
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def count_word_repetitions(self, text, word):
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"""Count how many times a specific word appears in the text."""
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return len(re.findall(r"\b" + re.escape(word) + r"\b", text.lower()))
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def _test_penalty_effect(
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self,
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prompt,
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baseline_params,
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penalty_params,
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target_word,
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expected_reduction=True,
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max_tokens=50,
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):
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"""Generic test for penalty effects."""
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# Run multiple iterations to get more reliable results
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baseline_counts = []
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penalty_counts = []
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for i in range(5):
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baseline_output = self.run_generate_with_prompt(
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prompt, baseline_params, max_tokens
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)
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penalty_output = self.run_generate_with_prompt(
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prompt, penalty_params, max_tokens
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)
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baseline_count = self.count_word_repetitions(baseline_output, target_word)
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penalty_count = self.count_word_repetitions(penalty_output, target_word)
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baseline_counts.append(baseline_count)
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penalty_counts.append(penalty_count)
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# Calculate averages
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avg_baseline = sum(baseline_counts) / len(baseline_counts)
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avg_penalty = sum(penalty_counts) / len(penalty_counts)
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if expected_reduction:
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# Simple check: penalty should reduce repetition
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self.assertLess(
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avg_penalty,
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avg_baseline,
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f"Penalty should reduce '{target_word}' repetition: {avg_baseline:.1f} → {avg_penalty:.1f}",
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)
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else:
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self.assertGreater(
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avg_penalty,
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avg_baseline,
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f"Negative penalty should increase '{target_word}' repetition",
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)
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def test_default_values(self):
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self.run_decode({})
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def test_frequency_penalty(self):
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self.run_decode({"frequency_penalty": 2})
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def test_min_new_tokens(self):
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self.run_decode({"min_new_tokens": 16})
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def test_presence_penalty(self):
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self.run_decode({"presence_penalty": 2})
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def test_penalty_mixed(self):
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args = [
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{},
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{},
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{},
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{"frequency_penalty": 2},
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{"presence_penalty": 1},
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{"min_new_tokens": 16},
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{"frequency_penalty": 0.2},
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{"presence_penalty": 0.4},
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{"min_new_tokens": 8},
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{"frequency_penalty": 0.4, "presence_penalty": 0.8},
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{"frequency_penalty": 0.4, "min_new_tokens": 12},
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{"presence_penalty": 0.8, "min_new_tokens": 12},
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{"presence_penalty": -0.3, "frequency_penalty": 1.3, "min_new_tokens": 32},
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{"presence_penalty": 0.3, "frequency_penalty": -1.3, "min_new_tokens": 32},
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]
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random.shuffle(args * 5)
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with ThreadPoolExecutor(8) as executor:
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list(executor.map(self.run_decode, args))
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def test_frequency_penalty_reduces_word_repetition(self):
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"""Test frequency penalty using word repetition."""
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prompt = "Write exactly 10 very small sentences, each containing the word 'data'. Use the word 'data' as much as possible."
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baseline_params = {"frequency_penalty": 0.0, "repetition_penalty": 1.0}
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penalty_params = {"frequency_penalty": 1.99, "repetition_penalty": 1.0}
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self._test_penalty_effect(prompt, baseline_params, penalty_params, "data")
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def test_presence_penalty_reduces_topic_repetition(self):
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"""Test presence penalty using topic repetition."""
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prompt = "Write the word 'machine learning' exactly 20 times in a row, separated by spaces."
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baseline_params = {"presence_penalty": 0.0, "repetition_penalty": 1.0}
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penalty_params = {"presence_penalty": 1.99, "repetition_penalty": 1.0}
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self._test_penalty_effect(
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prompt, baseline_params, penalty_params, "machine learning"
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)
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def test_combined_penalties_reduce_repetition(self):
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"""Test combined penalty effects."""
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prompt = "Write exactly 10 short sentences, each containing the word 'data'. Use the word 'data' as much as possible."
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baseline_params = {
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"frequency_penalty": 0.0,
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"presence_penalty": 0.0,
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"repetition_penalty": 1.0,
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}
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penalty_params = {
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"frequency_penalty": 1.99,
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"presence_penalty": 1.99,
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"repetition_penalty": 1.99,
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}
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self._test_penalty_effect(
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prompt, baseline_params, penalty_params, "data", max_tokens=100
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)
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def test_penalty_edge_cases_negative_penalty_values(self):
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"""Test edge cases with negative penalty values."""
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prompt = "Write the word 'test' exactly 15 times in a row, separated by spaces."
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baseline_params = {
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"frequency_penalty": 0.0,
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"presence_penalty": 0.0,
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"repetition_penalty": 1.0,
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}
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negative_penalty_params = {
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"frequency_penalty": -0.5,
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"presence_penalty": -0.25,
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"repetition_penalty": 1.0,
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}
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# Negative penalties should increase repetition (expected_reduction=False)
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self._test_penalty_effect(
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prompt,
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baseline_params,
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negative_penalty_params,
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"test",
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expected_reduction=False,
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max_tokens=60,
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)
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def test_penalty_edge_cases_extreme_penalty_values(self):
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"""Test edge cases with extreme penalty values."""
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prompt = (
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"Write the word 'extreme' exactly 20 times in a row, separated by spaces."
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)
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baseline_params = {
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"frequency_penalty": 0.0,
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"presence_penalty": 0.0,
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"repetition_penalty": 1.0,
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}
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extreme_penalty_params = {
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"frequency_penalty": 2.0,
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"presence_penalty": 2.0,
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"repetition_penalty": 2.0,
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}
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# Extreme penalties should strongly reduce repetition
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self._test_penalty_effect(
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prompt,
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baseline_params,
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extreme_penalty_params,
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"extreme",
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expected_reduction=True,
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max_tokens=80,
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)
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if __name__ == "__main__":
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unittest.main(verbosity=3)
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