diff --git a/experiments/dsv4_h200_sglang_tp_dp_matrix/run_bench.sh b/experiments/dsv4_h200_sglang_tp_dp_matrix/run_bench.sh
index 09a5e09..2291b8d 100755
--- a/experiments/dsv4_h200_sglang_tp_dp_matrix/run_bench.sh
+++ b/experiments/dsv4_h200_sglang_tp_dp_matrix/run_bench.sh
@@ -132,26 +132,29 @@ run_bench_serving() {
     "$PYTHON" -m sglang.bench_serving "$@"
   fi
 }
+export -f run_bench_serving
 
 run_warmup() {
   local input_len="$1"
   local output_len="$2"
 
   log "warming up (input=${input_len}, output=${output_len}, num=1)"
-  run_bench_serving \
-    --backend sglang \
-    --host 127.0.0.1 \
-    --port "$SGLANG_PORT" \
-    --dataset-name random \
-    --dataset-path "$DATASET_PATH" \
-    --random-input-len "$input_len" \
-    --random-output-len "$output_len" \
-    --num-prompts 1 \
-    --max-concurrency 1 \
-    --request-rate 10000 \
-    --output-file /dev/null \
-    --output-details \
-    >> "${log_dir_global}/warmup.log" 2>&1
+  bash -c '
+    run_bench_serving \
+      --backend sglang \
+      --host 127.0.0.1 \
+      --port "'"$SGLANG_PORT"'" \
+      --dataset-name random \
+      --dataset-path "'"$DATASET_PATH"'" \
+      --random-input-len "'"$input_len"'" \
+      --random-output-len "'"$output_len"'" \
+      --num-prompts 1 \
+      --max-concurrency 1 \
+      --request-rate 10000 \
+      --output-file /dev/null \
+      --output-details \
+      >> "'"${log_dir_global}/warmup.log"'" 2>&1
+  '
   log "warmup completed"
 }
 
@@ -415,21 +418,22 @@ run_parallel_config() {
     gpu_pid="$(start_gpu_monitor "$gpu_csv")"
 
     bench_rc=0
-    timeout "$SCENARIO_TIMEOUT_S" \
+    timeout "$SCENARIO_TIMEOUT_S" bash -c '
       run_bench_serving \
         --backend sglang \
         --host 127.0.0.1 \
-        --port "$SGLANG_PORT" \
+        --port "'"$SGLANG_PORT"'" \
         --dataset-name random \
-        --dataset-path "$DATASET_PATH" \
-        --random-input-len "$isl" \
-        --random-output-len "$dsl" \
-        --num-prompts "$num" \
-        --max-concurrency "$conc" \
+        --dataset-path "'"$DATASET_PATH"'" \
+        --random-input-len "'"$isl"'" \
+        --random-output-len "'"$dsl"'" \
+        --num-prompts "'"$num"'" \
+        --max-concurrency "'"$conc"'" \
         --request-rate 10000 \
-        --output-file "$output_file" \
+        --output-file "'"$output_file"'" \
         --output-details \
-        > "$detail_log" 2>&1 || bench_rc=$?
+        > "'"$detail_log"'" 2>&1
+    ' || bench_rc=$?
 
     stop_gpu_monitor "$gpu_pid"