add an absolute path for run.sh (vllm-project#18258)

Signed-off-by: calvin chen <120380290@qq.com>
Signed-off-by: minpeter <kali2005611@gmail.com>

Author: calvin0327

examples/offline_inference/disaggregated-prefill-v1/run.sh

@@ -1,5 +1,11 @@
 rm -rf local_storage/
-rm output.txt
 
-VLLM_ENABLE_V1_MULTIPROCESSING=0 CUDA_VISIBLE_DEVICES=0 python3 prefill_example.py
-VLLM_ENABLE_V1_MULTIPROCESSING=0 CUDA_VISIBLE_DEVICES=0 python3 decode_example.py
+if [ -f "output.txt" ]; then
+    rm output.txt
+fi
+
+# The directory of current script
+SCRIPT_DIR=$(dirname "$(readlink -f "$0")")
+
+VLLM_ENABLE_V1_MULTIPROCESSING=0 CUDA_VISIBLE_DEVICES=0 python3 "$SCRIPT_DIR/prefill_example.py"
+VLLM_ENABLE_V1_MULTIPROCESSING=0 CUDA_VISIBLE_DEVICES=0 python3 "$SCRIPT_DIR/decode_example.py"