#!/usr/bin/env python3 # SPDX-License-Identifier: GPL-2.0 import datetime import random from lib.py import ksft_run, ksft_pr, ksft_exit, ksft_eq, ksft_ge, ksft_lt from lib.py import NetDrvEpEnv from lib.py import NetdevFamily from lib.py import KsftSkipEx from lib.py import rand_port from lib.py import ethtool, ip, GenerateTraffic, CmdExitFailure def _rss_key_str(key): return ":".join(["{:02x}".format(x) for x in key]) def _rss_key_rand(length): return [random.randint(0, 255) for _ in range(length)] def get_rss(cfg, context=0): return ethtool(f"-x {cfg.ifname} context {context}", json=True)[0] def get_drop_err_sum(cfg): stats = ip("-s -s link show dev " + cfg.ifname, json=True)[0] cnt = 0 for key in ['errors', 'dropped', 'over_errors', 'fifo_errors', 'length_errors', 'crc_errors', 'missed_errors', 'frame_errors']: cnt += stats["stats64"]["rx"][key] return cnt, stats["stats64"]["tx"]["carrier_changes"] def ethtool_create(cfg, act, opts): output = ethtool(f"{act} {cfg.ifname} {opts}").stdout # Output will be something like: "New RSS context is 1" or # "Added rule with ID 7", we want the integer from the end return int(output.split()[-1]) def require_ntuple(cfg): features = ethtool(f"-k {cfg.ifname}", json=True)[0] if not features["ntuple-filters"]["active"]: # ntuple is more of a capability than a config knob, don't bother # trying to enable it (until some driver actually needs it). raise KsftSkipEx("Ntuple filters not enabled on the device: " + str(features["ntuple-filters"])) # Get Rx packet counts for all queues, as a simple list of integers # if @prev is specified the prev counts will be subtracted def _get_rx_cnts(cfg, prev=None): cfg.wait_hw_stats_settle() data = cfg.netdevnl.qstats_get({"ifindex": cfg.ifindex, "scope": ["queue"]}, dump=True) data = [x for x in data if x['queue-type'] == "rx"] max_q = max([x["queue-id"] for x in data]) queue_stats = [0] * (max_q + 1) for q in data: queue_stats[q["queue-id"]] = q["rx-packets"] if prev and q["queue-id"] < len(prev): queue_stats[q["queue-id"]] -= prev[q["queue-id"]] return queue_stats def test_rss_key_indir(cfg): """ Test basics like updating the main RSS key and indirection table. """ if len(_get_rx_cnts(cfg)) < 2: KsftSkipEx("Device has only one queue (or doesn't support queue stats)") data = get_rss(cfg) want_keys = ['rss-hash-key', 'rss-hash-function', 'rss-indirection-table'] for k in want_keys: if k not in data: raise KsftFailEx("ethtool results missing key: " + k) if not data[k]: raise KsftFailEx(f"ethtool results empty for '{k}': {data[k]}") key_len = len(data['rss-hash-key']) # Set the key key = _rss_key_rand(key_len) ethtool(f"-X {cfg.ifname} hkey " + _rss_key_str(key)) data = get_rss(cfg) ksft_eq(key, data['rss-hash-key']) # Set the indirection table ethtool(f"-X {cfg.ifname} equal 2") data = get_rss(cfg) ksft_eq(0, min(data['rss-indirection-table'])) ksft_eq(1, max(data['rss-indirection-table'])) # Check we only get traffic on the first 2 queues cnts = _get_rx_cnts(cfg) GenerateTraffic(cfg).wait_pkts_and_stop(20000) cnts = _get_rx_cnts(cfg, prev=cnts) # 2 queues, 20k packets, must be at least 5k per queue ksft_ge(cnts[0], 5000, "traffic on main context (1/2): " + str(cnts)) ksft_ge(cnts[1], 5000, "traffic on main context (2/2): " + str(cnts)) # The other queues should be unused ksft_eq(sum(cnts[2:]), 0, "traffic on unused queues: " + str(cnts)) # Restore, and check traffic gets spread again ethtool(f"-X {cfg.ifname} default") cnts = _get_rx_cnts(cfg) GenerateTraffic(cfg).wait_pkts_and_stop(20000) cnts = _get_rx_cnts(cfg, prev=cnts) # First two queues get less traffic than all the rest ksft_lt(sum(cnts[:2]), sum(cnts[2:]), "traffic distributed: " + str(cnts)) def test_rss_context(cfg, ctx_cnt=1, create_with_cfg=None): """ Test separating traffic into RSS contexts. The queues will be allocated 2 for each context: ctx0 ctx1 ctx2 ctx3 [0 1] [2 3] [4 5] [6 7] ... """ require_ntuple(cfg) requested_ctx_cnt = ctx_cnt # Try to allocate more queues when necessary qcnt = len(_get_rx_cnts(cfg)) if qcnt >= 2 + 2 * ctx_cnt: qcnt = None else: try: ksft_pr(f"Increasing queue count {qcnt} -> {2 + 2 * ctx_cnt}") ethtool(f"-L {cfg.ifname} combined {2 + 2 * ctx_cnt}") except: raise KsftSkipEx("Not enough queues for the test") ntuple = [] ctx_id = [] ports = [] try: # Use queues 0 and 1 for normal traffic ethtool(f"-X {cfg.ifname} equal 2") for i in range(ctx_cnt): want_cfg = f"start {2 + i * 2} equal 2" create_cfg = want_cfg if create_with_cfg else "" try: ctx_id.append(ethtool_create(cfg, "-X", f"context new {create_cfg}")) except CmdExitFailure: # try to carry on and skip at the end if i == 0: raise ksft_pr(f"Failed to create context {i + 1}, trying to test what we got") ctx_cnt = i break if not create_with_cfg: ethtool(f"-X {cfg.ifname} context {ctx_id[i]} {want_cfg}") # Sanity check the context we just created data = get_rss(cfg, ctx_id[i]) ksft_eq(min(data['rss-indirection-table']), 2 + i * 2, "Unexpected context cfg: " + str(data)) ksft_eq(max(data['rss-indirection-table']), 2 + i * 2 + 1, "Unexpected context cfg: " + str(data)) ports.append(rand_port()) flow = f"flow-type tcp{cfg.addr_ipver} dst-port {ports[i]} context {ctx_id[i]}" ntuple.append(ethtool_create(cfg, "-N", flow)) for i in range(ctx_cnt): cnts = _get_rx_cnts(cfg) GenerateTraffic(cfg, port=ports[i]).wait_pkts_and_stop(20000) cnts = _get_rx_cnts(cfg, prev=cnts) ksft_lt(sum(cnts[ :2]), 10000, "traffic on main context:" + str(cnts)) ksft_ge(sum(cnts[2+i*2:4+i*2]), 20000, f"traffic on context {i}: " + str(cnts)) ksft_eq(sum(cnts[2:2+i*2] + cnts[4+i*2:]), 0, "traffic on other contexts: " + str(cnts)) finally: for nid in ntuple: ethtool(f"-N {cfg.ifname} delete {nid}") for cid in ctx_id: ethtool(f"-X {cfg.ifname} context {cid} delete") ethtool(f"-X {cfg.ifname} default") if qcnt: ethtool(f"-L {cfg.ifname} combined {qcnt}") if requested_ctx_cnt != ctx_cnt: raise KsftSkipEx(f"Tested only {ctx_cnt} contexts, wanted {requested_ctx_cnt}") def test_rss_context4(cfg): test_rss_context(cfg, 4) def test_rss_context32(cfg): test_rss_context(cfg, 32) def test_rss_context4_create_with_cfg(cfg): test_rss_context(cfg, 4, create_with_cfg=True) def test_rss_context_out_of_order(cfg, ctx_cnt=4): """ Test separating traffic into RSS contexts. Contexts are removed in semi-random order, and steering re-tested to make sure removal doesn't break steering to surviving contexts. Test requires 3 contexts to work. """ require_ntuple(cfg) requested_ctx_cnt = ctx_cnt # Try to allocate more queues when necessary qcnt = len(_get_rx_cnts(cfg)) if qcnt >= 2 + 2 * ctx_cnt: qcnt = None else: try: ksft_pr(f"Increasing queue count {qcnt} -> {2 + 2 * ctx_cnt}") ethtool(f"-L {cfg.ifname} combined {2 + 2 * ctx_cnt}") except: raise KsftSkipEx("Not enough queues for the test") ntuple = [] ctx_id = [] ports = [] def remove_ctx(idx): ethtool(f"-N {cfg.ifname} delete {ntuple[idx]}") ntuple[idx] = None ethtool(f"-X {cfg.ifname} context {ctx_id[idx]} delete") ctx_id[idx] = None def check_traffic(): for i in range(ctx_cnt): cnts = _get_rx_cnts(cfg) GenerateTraffic(cfg, port=ports[i]).wait_pkts_and_stop(20000) cnts = _get_rx_cnts(cfg, prev=cnts) if ctx_id[i] is None: ksft_lt(sum(cnts[ :2]), 10000, "traffic on main context:" + str(cnts)) ksft_ge(sum(cnts[2+i*2:4+i*2]), 20000, f"traffic on context {i}: " + str(cnts)) ksft_eq(sum(cnts[2:2+i*2] + cnts[4+i*2:]), 0, "traffic on other contexts: " + str(cnts)) else: ksft_ge(sum(cnts[ :2]), 20000, "traffic on main context:" + str(cnts)) ksft_eq(sum(cnts[2: ]), 0, "traffic on other contexts: " + str(cnts)) try: # Use queues 0 and 1 for normal traffic ethtool(f"-X {cfg.ifname} equal 2") for i in range(ctx_cnt): ctx_id.append(ethtool_create(cfg, "-X", f"context new start {2 + i * 2} equal 2")) ports.append(rand_port()) flow = f"flow-type tcp{cfg.addr_ipver} dst-port {ports[i]} context {ctx_id[i]}" ntuple.append(ethtool_create(cfg, "-N", flow)) check_traffic() # Remove middle context remove_ctx(ctx_cnt // 2) check_traffic() # Remove first context remove_ctx(0) check_traffic() # Remove last context remove_ctx(-1) check_traffic() finally: for nid in ntuple: if nid is not None: ethtool(f"-N {cfg.ifname} delete {nid}") for cid in ctx_id: if cid is not None: ethtool(f"-X {cfg.ifname} context {cid} delete") ethtool(f"-X {cfg.ifname} default") if qcnt: ethtool(f"-L {cfg.ifname} combined {qcnt}") if requested_ctx_cnt != ctx_cnt: raise KsftSkipEx(f"Tested only {ctx_cnt} contexts, wanted {requested_ctx_cnt}") def test_rss_context_overlap(cfg, other_ctx=0): """ Test contexts overlapping with each other. Use 4 queues for the main context, but only queues 2 and 3 for context 1. """ require_ntuple(cfg) queue_cnt = len(_get_rx_cnts(cfg)) if queue_cnt >= 4: queue_cnt = None else: try: ksft_pr(f"Increasing queue count {queue_cnt} -> 4") ethtool(f"-L {cfg.ifname} combined 4") except: raise KsftSkipEx("Not enough queues for the test") ctx_id = None ntuple = None if other_ctx == 0: ethtool(f"-X {cfg.ifname} equal 4") else: other_ctx = ethtool_create(cfg, "-X", "context new") ethtool(f"-X {cfg.ifname} context {other_ctx} equal 4") try: ctx_id = ethtool_create(cfg, "-X", "context new") ethtool(f"-X {cfg.ifname} context {ctx_id} start 2 equal 2") port = rand_port() if other_ctx: flow = f"flow-type tcp{cfg.addr_ipver} dst-port {port} context {other_ctx}" ntuple = ethtool_create(cfg, "-N", flow) # Test the main context cnts = _get_rx_cnts(cfg) GenerateTraffic(cfg, port=port).wait_pkts_and_stop(20000) cnts = _get_rx_cnts(cfg, prev=cnts) ksft_ge(sum(cnts[ :4]), 20000, "traffic on main context: " + str(cnts)) ksft_ge(sum(cnts[ :2]), 7000, "traffic on main context (1/2): " + str(cnts)) ksft_ge(sum(cnts[2:4]), 7000, "traffic on main context (2/2): " + str(cnts)) if other_ctx == 0: ksft_eq(sum(cnts[4: ]), 0, "traffic on other queues: " + str(cnts)) # Now create a rule for context 1 and make sure traffic goes to a subset if other_ctx: ethtool(f"-N {cfg.ifname} delete {ntuple}") ntuple = None flow = f"flow-type tcp{cfg.addr_ipver} dst-port {port} context {ctx_id}" ntuple = ethtool_create(cfg, "-N", flow) cnts = _get_rx_cnts(cfg) GenerateTraffic(cfg, port=port).wait_pkts_and_stop(20000) cnts = _get_rx_cnts(cfg, prev=cnts) ksft_lt(sum(cnts[ :2]), 7000, "traffic on main context: " + str(cnts)) ksft_ge(sum(cnts[2:4]), 20000, "traffic on extra context: " + str(cnts)) if other_ctx == 0: ksft_eq(sum(cnts[4: ]), 0, "traffic on other queues: " + str(cnts)) finally: if ntuple is not None: ethtool(f"-N {cfg.ifname} delete {ntuple}") if ctx_id: ethtool(f"-X {cfg.ifname} context {ctx_id} delete") if other_ctx == 0: ethtool(f"-X {cfg.ifname} default") else: ethtool(f"-X {cfg.ifname} context {other_ctx} delete") if queue_cnt: ethtool(f"-L {cfg.ifname} combined {queue_cnt}") def test_rss_context_overlap2(cfg): test_rss_context_overlap(cfg, True) def main() -> None: with NetDrvEpEnv(__file__, nsim_test=False) as cfg: cfg.netdevnl = NetdevFamily() ksft_run([test_rss_key_indir, test_rss_context, test_rss_context4, test_rss_context32, test_rss_context_overlap, test_rss_context_overlap2, test_rss_context_out_of_order, test_rss_context4_create_with_cfg], args=(cfg, )) ksft_exit() if __name__ == "__main__": main()