Support inf request rate and number prompts in LPG (#847)

* minor updates to lpg and checkpoint conversion

* Support inf request rate and number prompts

Author: vivianrwu

benchmarks/benchmark/tools/profile-generator/container/latency_throughput_curve.sh

@@ -29,7 +29,14 @@ for request_rate in $(echo $REQUEST_RATES | tr ',' ' '); do
   # TODO: Check if profile already exists, if so then skip
   timestamp=$(date +"%Y-%m-%d_%H-%M-%S")
   output_file="latency-profile-${timestamp}.txt"
-  PYTHON_OPTS="$PYTHON_OPTS --save-json-results --host=$IP   --port=$PORT   --model=$TOKENIZER --dataset=$PROMPT_DATASET_FILE --tokenizer=$TOKENIZER --request-rate=$request_rate --backend=$BACKEND --num-prompts=$((request_rate * $BENCHMARK_TIME_SECONDS)) --max-input-length=$INPUT_LENGTH --max-output-length=$OUTPUT_LENGTH"
+  if [ ${request_rate} == 0 ]; then
+    request_rate="inf"
+    NUM_PROMPTS=$MAX_NUM_PROMPTS
+  else
+    NUM_PROMPTS=$((${request_rate} * $BENCHMARK_TIME_SECONDS))
+  fi
+    
+  PYTHON_OPTS="$PYTHON_OPTS --save-json-results --host=$IP   --port=$PORT   --model=$TOKENIZER --dataset=$PROMPT_DATASET_FILE --tokenizer=$TOKENIZER --request-rate=$request_rate --backend=$BACKEND --num-prompts=$NUM_PROMPTS --max-input-length=$INPUT_LENGTH --max-output-length=$OUTPUT_LENGTH"
   if [[ "$SCRAPE_SERVER_METRICS" = "true" ]]; then
     PYTHON_OPTS="$PYTHON_OPTS --scrape-server-metrics"
   fi

benchmarks/benchmark/tools/profile-generator/modules/latency-profile/manifest-templates/latency-profile-generator.yaml.tpl

@@ -42,6 +42,8 @@ spec:
               value: ${output_bucket}
             - name: SCRAPE_SERVER_METRICS
               value: ${scrape_server_metrics}
+            - name: MAX_NUM_PROMPTS
+              value: ${max_num_prompts}
 %{ for hugging_face_token_secret in hugging_face_token_secret_list ~}
             - name: HF_TOKEN
               valueFrom: