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validateOffload.py
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validateOffload.py
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from common import (
TFT_TOOLS_IMG,
PluginOutput,
j2_render,
TftAggregateOutput,
PodType,
Result,
VALIDATE_OFFLOAD_PLUGIN,
)
from dataclasses import asdict, is_dataclass
from logger import logger
import time
from testConfig import TestConfig
from iperf import IperfServer, IperfClient, EXTERNAL_IPERF3_SERVER
from thread import ReturnValueThread
from task import Task
from typing import Optional, Union, Tuple
import sys
import json
from syncManager import SyncManager
class ValidateOffload(Task):
def __init__(
self,
tft: TestConfig,
iperf_instance: Union[IperfServer, IperfClient],
tenant: bool,
):
super().__init__(tft, 0, iperf_instance.node_name, tenant)
self.in_file_template = "./manifests/tools-pod.yaml.j2"
self.out_file_yaml = (
f"./manifests/yamls/tools-pod-{self.node_name}-validate-offload.yaml"
)
self.template_args["pod_name"] = f"tools-pod-{self.node_name}-validate-offload"
self.template_args["test_image"] = TFT_TOOLS_IMG
self.pod_name = self.template_args["pod_name"]
self._iperf_instance = iperf_instance
self.iperf_pod_name = iperf_instance.pod_name
self.iperf_pod_type = iperf_instance.pod_type
self.ethtool_cmd = ""
j2_render(self.in_file_template, self.out_file_yaml, self.template_args)
logger.info(f"Generated Server Pod Yaml {self.out_file_yaml}")
def extract_vf_rep(self) -> str:
if self.iperf_pod_type == PodType.HOSTBACKED:
logger.info(f"The VF representor is: ovn-k8s-mp0")
return "ovn-k8s-mp0"
if self.iperf_pod_name == EXTERNAL_IPERF3_SERVER:
logger.info(f"There is no VF on an external server")
return "external"
self.get_vf_rep_cmd = f'exec -n default {self.pod_name} -- /bin/sh -c "crictl --runtime-endpoint=unix:///host/run/crio/crio.sock ps -a --name={self.iperf_pod_name} -o json "'
r = self.run_oc(self.get_vf_rep_cmd)
if r.returncode != 0:
if "already exists" not in r.err:
logger.error(f"Extract_vf_rep: {r.err}, {r.returncode}")
vf_rep_json = r.out
data = json.loads(vf_rep_json)
logger.info(
f"The VF representor is: {data['containers'][0]['podSandboxId'][:15]}"
)
return data["containers"][0]["podSandboxId"][:15]
def run_ethtool_cmd(self, ethtool_cmd: str) -> Result:
logger.info(f"Running {ethtool_cmd}")
r = self.run_oc(ethtool_cmd)
if self.iperf_pod_type != PodType.HOSTBACKED:
if r.returncode != 0:
if "already exists" not in r.err:
logger.error(f"Run_ethtool_cmd: {r.err}, {r.returncode}")
raise RuntimeError(
f"ValidateOffload error: {r.err} returncode: {r.returncode}"
)
return r
def parse_packets(self, output: str, packet_type: str) -> int:
# Case1: Try to parse rx_packets and tx_packets from ethtool output
prefix = f"{packet_type}_packets"
if prefix in output:
for line in output.splitlines():
stripped_line = line.strip()
if stripped_line.startswith(prefix):
return int(stripped_line.split(":")[1])
# Case2: Ethtool output does not provide these fields, so we need to sum the queues manually
total_packets = 0
prefix = f"{packet_type}_queue_"
packet_suffix = "_xdp_packets:"
for line in output.splitlines():
stripped_line = line.strip()
if prefix in stripped_line and packet_suffix in stripped_line:
packet_count = int(stripped_line.split(":")[1].strip())
total_packets += packet_count
return total_packets
def run(self, duration: int) -> None:
def stat(self: ValidateOffload, duration: int) -> Result:
SyncManager.wait_on_barrier()
vf_rep = self.extract_vf_rep()
self.ethtool_cmd = (
f'exec -n default {self.pod_name} -- /bin/sh -c "ethtool -S {vf_rep}"'
)
if vf_rep == "ovn-k8s-mp0":
return Result(out="Hostbacked pod", err="", returncode=0)
if vf_rep == "external":
return Result(out="External Iperf Server", err="", returncode=0)
r1 = self.run_ethtool_cmd(self.ethtool_cmd)
if r1.returncode != 0:
logger.error("Ethtool command failed")
return r1
SyncManager.wait_on_client_finish()
r2 = self.run_ethtool_cmd(self.ethtool_cmd)
combined_out = f"{r1.out}--DELIMIT--{r2.out}"
return Result(out=combined_out, err=r2.err, returncode=r2.returncode)
self.exec_thread = ReturnValueThread(target=stat, args=(self, duration))
self.exec_thread.start()
def output(self, out: TftAggregateOutput) -> None:
assert isinstance(
self._output, PluginOutput
), f"Expected variable to be of type PluginOutput, got {type(self._output)} instead."
out.plugins.append(self._output)
if self.iperf_pod_type == PodType.HOSTBACKED:
if isinstance(self._iperf_instance, IperfClient):
logger.info(f"The client VF representor ovn-k8s-mp0_0 does not exist")
else:
logger.info(f"The server VF representor ovn-k8s-mp0_0 does not exist")
logger.info(
f"validateOffload results on {self.iperf_pod_name}: {self._output.result}"
)
def generate_output(self, data: str) -> PluginOutput:
# Different behavior has been seen from the ethtool output depending on the driver in question
# Log the output of ethtool temporarily until this is more stable.
# TODO: switch to debug
logger.info(f"generate hwol output from data: {data}")
split_data = data.split("--DELIMIT--")
parsed_data: dict[str, Union[str, int]] = {}
if len(split_data) >= 1:
parsed_data["rx_start"] = self.parse_packets(split_data[0], "rx")
parsed_data["tx_start"] = self.parse_packets(split_data[0], "tx")
if len(split_data) >= 2:
parsed_data["rx_end"] = self.parse_packets(split_data[1], "rx")
parsed_data["tx_end"] = self.parse_packets(split_data[1], "tx")
if len(split_data) >= 3:
parsed_data["additional_info"] = "--DELIMIT--".join(split_data[2:])
logger.info(
f"rx_packet_start: {parsed_data.get('rx_start', 'N/A')}\n"
f"tx_packet_start: {parsed_data.get('tx_start', 'N/A')}\n"
f"rx_packet_end: {parsed_data.get('rx_end', 'N/A')}\n"
f"tx_packet_end: {parsed_data.get('tx_end', 'N/A')}\n"
)
return PluginOutput(
command=self.ethtool_cmd,
plugin_metadata={
"name": "GetEthtoolStats",
"node_name": self.node_name,
"pod_name": self.pod_name,
},
result=parsed_data,
name=VALIDATE_OFFLOAD_PLUGIN,
)