diff --git a/cvs/lib/ibperf_lib.py b/cvs/lib/ibperf_lib.py
index 1369216e..7d07f2c8 100644
--- a/cvs/lib/ibperf_lib.py
+++ b/cvs/lib/ibperf_lib.py
@@ -64,6 +64,78 @@ def detect_rocm_path(phdl, config_rocm_path):
     return '/opt/rocm'
 
 
+def check_perftest_dmabuf_support(phdl, binary_path):
+    """
+    Check if the given perftest binary on the cluster node supports the
+    --use_rocm_dmabuf flag by executing the binary's help output and
+    grepping for the flag.
+
+    Args:
+        phdl: Pssh handle used to execute commands on one or more cluster nodes.
+        binary_path (str): Full path to the perftest binary on the node.
+
+    Returns:
+        bool: True if the binary supports --use_rocm_dmabuf on any host,
+              False otherwise.
+    """
+    cmd = f"{binary_path} --help 2>&1 | grep use_rocm_dmabuf"
+    log.info("Checking dmabuf support: %s", cmd)
+
+    try:
+        # detailed=True gives us exit_code per host
+        host_results = phdl.exec(cmd, detailed=True, print_console=False)
+        # host_results: {host: {"output": str, "exit_code": int}}
+
+        dmabuf_supported_any = False
+
+        for host, result in host_results.items():
+            # Some safety in case of unexpected shape
+            if not isinstance(result, dict):
+                log.warning("Unexpected exec result type for host %s: %r", host, result)
+                continue
+
+            exit_code = result.get("exit_code", -1)
+            output = result.get("output", "") or ""
+
+            log.debug(
+                "dmabuf check host=%s exit_code=%s, output=%r",
+                host,
+                exit_code,
+                output,
+            )
+
+            # Mirror your manual test: grep returns 0 on match
+            if "use_rocm_dmabuf" in output:
+                if exit_code != 0:
+                    log.warning(
+                        "Host %s: found 'use_rocm_dmabuf' in output but exit_code=%s; treating as supported.",
+                        host,
+                        exit_code,
+                    )
+                log.info(
+                    "Binary %s on host %s supports --use_rocm_dmabuf",
+                    binary_path,
+                    host,
+                )
+                dmabuf_supported_any = True
+            else:
+                log.info(
+                    "Binary %s on host %s does NOT support --use_rocm_dmabuf (no match in output).",
+                    binary_path,
+                    host,
+                )
+
+        return dmabuf_supported_any
+
+    except Exception as e:  # pylint: disable=broad-except
+        log.warning(
+            "Failed to check dmabuf support for %s: %s. Assuming no dmabuf support.",
+            binary_path,
+            str(e),
+        )
+        return False
+
+
 def get_ib_bw_pps(phdl, msg_size, cmd):
     res_dict = {}
 
@@ -201,6 +273,7 @@ def run_ib_perf_bw_test(
         log.info(f'Setting LD_LIBRARY_PATH to {rocm_path}/lib for perftest binaries')
         phdl.exec(f'echo "export LD_LIBRARY_PATH={rocm_path}/lib:$LD_LIBRARY_PATH" >> /tmp/ib_cmds_file.txt')
     server_addr = None
+    dmabuf_supported = check_perftest_dmabuf_support(phdl, f'{app_path}/{bw_test}')
     for node in bck_nic_dict.keys():
         result_dict[node] = {}
         cmd_dict[node] = []
@@ -215,7 +288,15 @@ def run_ib_perf_bw_test(
             for gpu_no in range(0, 8):
                 card_no = 'card' + str(gpu_no)
                 rdma_dev = gpu_nic_dict[node][card_no]['rdma_dev']
-                cmd = f'numactl --physcpubind={gpu_numa_dict[node][card_no]["local_cpulist"]} --localalloc {app_path}/{bw_test} -d {rdma_dev} --use_rocm={gpu_no} -x {gid_index} --report_gbits -b -F -D {duration} -p {port_no} -s {msg_size} -q {qp_count} > /tmp/ib_perf_{inst_count}_logs &  2>&1'
+                if dmabuf_supported:
+                    cmd = f'numactl --physcpubind={gpu_numa_dict[node][card_no]["local_cpulist"]} --localalloc {app_path}/{bw_test} \
+                            -d {rdma_dev} --use_rocm={gpu_no} --use_rocm_dmabuf -x {gid_index} --report_gbits -b -F -D {duration} -p {port_no} \
+                            -s {msg_size} -q {qp_count} > /tmp/ib_perf_{inst_count}_logs &  2>&1'
+                else:
+                    cmd = f'numactl --physcpubind={gpu_numa_dict[node][card_no]["local_cpulist"]} --localalloc {app_path}/{bw_test} \
+                            -d {rdma_dev} --use_rocm={gpu_no} -x {gid_index} --report_gbits -b -F -D {duration} -p {port_no} \
+                            -s {msg_size} -q {qp_count} > /tmp/ib_perf_{inst_count}_logs &  2>&1'
+
                 cmd_dict[node].append(f'echo "{cmd}" >> /tmp/ib_cmds_file.txt')
                 inst_count = inst_count + 1
                 port_no = port_no + 1
@@ -228,7 +309,14 @@ def run_ib_perf_bw_test(
             for gpu_no in range(0, 8):
                 card_no = 'card' + str(gpu_no)
                 rdma_dev = gpu_nic_dict[node][card_no]['rdma_dev']
-                cmd = f'numactl --physcpubind={gpu_numa_dict[node][card_no]["local_cpulist"]} --localalloc {app_path}/{bw_test} -d {rdma_dev} --use_rocm={gpu_no} -x {gid_index} --report_gbits -b -F -D {duration} -p {port_no} -s {msg_size} -q {qp_count} {server_addr} > /tmp/ib_perf_{inst_count}_logs &  2>&1'
+                if dmabuf_supported:
+                    cmd = f'numactl --physcpubind={gpu_numa_dict[node][card_no]["local_cpulist"]} --localalloc {app_path}/{bw_test} \
+                            -d {rdma_dev} --use_rocm={gpu_no} --use_rocm_dmabuf -x {gid_index} --report_gbits -b -F -D {duration} -p {port_no} \
+                            -s {msg_size} -q {qp_count} {server_addr} > /tmp/ib_perf_{inst_count}_logs &  2>&1'
+                else:
+                    cmd = f'numactl --physcpubind={gpu_numa_dict[node][card_no]["local_cpulist"]} --localalloc {app_path}/{bw_test} \
+                            -d {rdma_dev} --use_rocm={gpu_no} -x {gid_index} --report_gbits -b -F -D {duration} -p {port_no} \
+                            -s {msg_size} -q {qp_count} {server_addr} > /tmp/ib_perf_{inst_count}_logs &  2>&1'
                 cmd_dict[node].append(f'echo "{cmd}" >> /tmp/ib_cmds_file.txt')
                 inst_count = inst_count + 1
                 port_no = port_no + 1
@@ -282,6 +370,7 @@ def run_ib_perf_lat_test(
         log.info(f'Setting LD_LIBRARY_PATH to {rocm_path}/lib for perftest binaries')
         phdl.exec(f'echo "export LD_LIBRARY_PATH={rocm_path}/lib:$LD_LIBRARY_PATH" >> /tmp/ib_cmds_file.txt')
     server_addr = None
+    dmabuf_supported = check_perftest_dmabuf_support(phdl, f'{app_path}/{lat_test}')
     for node in bck_nic_dict.keys():
         result_dict[node] = {}
         cmd_dict[node] = []
@@ -296,7 +385,15 @@ def run_ib_perf_lat_test(
             for gpu_no in range(0, 8):
                 card_no = 'card' + str(gpu_no)
                 rdma_dev = gpu_nic_dict[node][card_no]['rdma_dev']
-                cmd = f'numactl --physcpubind={gpu_numa_dict[node][card_no]["local_cpulist"]} --localalloc {app_path}/{lat_test} -d {rdma_dev} --use_rocm={gpu_no} -x {gid_index} --report_gbits -F -p {port_no} -s {msg_size} > /tmp/ib_perf_{inst_count}_logs &  2>&1'
+                if dmabuf_supported:
+                    cmd = f'numactl --physcpubind={gpu_numa_dict[node][card_no]["local_cpulist"]} --localalloc {app_path}/{lat_test} \
+                            -d {rdma_dev} --use_rocm={gpu_no} --use_rocm_dmabuf -x {gid_index} --report_gbits -F -p {port_no} \
+                            -s {msg_size} > /tmp/ib_perf_{inst_count}_logs &  2>&1'
+                else:
+                    cmd = f'numactl --physcpubind={gpu_numa_dict[node][card_no]["local_cpulist"]} --localalloc {app_path}/{lat_test} \
+                            -d {rdma_dev} --use_rocm={gpu_no} -x {gid_index} --report_gbits -F -p {port_no} \
+                            -s {msg_size} > /tmp/ib_perf_{inst_count}_logs &  2>&1'
+
                 cmd_dict[node].append(f'echo "{cmd}" >> /tmp/ib_cmds_file.txt')
                 inst_count = inst_count + 1
                 port_no = port_no + 1
@@ -309,7 +406,14 @@ def run_ib_perf_lat_test(
             for gpu_no in range(0, 8):
                 card_no = 'card' + str(gpu_no)
                 rdma_dev = gpu_nic_dict[node][card_no]['rdma_dev']
-                cmd = f'numactl --physcpubind={gpu_numa_dict[node][card_no]["local_cpulist"]} --localalloc {app_path}/{lat_test} -d {rdma_dev} --use_rocm={gpu_no} -x {gid_index} --report_gbits -F -p {port_no} -s {msg_size} {server_addr} > /tmp/ib_perf_{inst_count}_logs &  2>&1'
+                if dmabuf_supported:
+                    cmd = f'numactl --physcpubind={gpu_numa_dict[node][card_no]["local_cpulist"]} --localalloc {app_path}/{lat_test} \
+                            -d {rdma_dev} --use_rocm={gpu_no} --use_rocm_dmabuf -x {gid_index} --report_gbits -F -p {port_no} \
+                            -s {msg_size} {server_addr} > /tmp/ib_perf_{inst_count}_logs &  2>&1'
+                else:
+                    cmd = f'numactl --physcpubind={gpu_numa_dict[node][card_no]["local_cpulist"]} --localalloc {app_path}/{lat_test} \
+                            -d {rdma_dev} --use_rocm={gpu_no} -x {gid_index} --report_gbits -F -p {port_no} \
+                            -s {msg_size} {server_addr} > /tmp/ib_perf_{inst_count}_logs &  2>&1'
                 cmd_dict[node].append(f'echo "{cmd}" >> /tmp/ib_cmds_file.txt')
                 inst_count = inst_count + 1
                 port_no = port_no + 1