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feat: collect stress-ng stats #428

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feat: collect stress-ng stats #428

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0fd32ca
feat: add perf parameter support for stress-ng
nhitar Jul 13, 2026
bd8066f
feat: add stats to parser test
nhitar Jul 13, 2026
7e78a9a
Merge branch 'main' into collect-stress-ng-stats
nhitar Jul 20, 2026
503d0d7
refactor: update regular expression for different stress-ng versions
nhitar Jul 20, 2026
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29 changes: 29 additions & 0 deletions src/imgtests/exec/loaders/stress_ng.py
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,7 @@ class StressNGMetrics(NamedTuple):
bogo_ops_s_usr_sys_time: float
cpu_used_per_instance: float
rss_max_kb: int | None = None
stats: dict[str, int] | None = None
top10_slowest: tuple[StressNGSyscallTiming, ...] | None = None


Expand Down Expand Up @@ -68,6 +69,7 @@ class StressNGResult(NamedTuple):
r"([\d.]+)" # CPU used per instance
r"(?:\s+([\d]+))?$", # RSS Max
)
STATS_RE: Final = re.compile(r"^([\d,]+)\s+(.+)\s+([\d.]+)\s+(.+)$")


class StressNg(PkgMgrMixin, GenericUtil):
Expand Down Expand Up @@ -406,6 +408,7 @@ def run( # noqa: PLR0913
*create_opt("pipeherd", pipeherd),
*create_opt("sigq", sigq),
*add_flag("metrics"),
*add_flag("perf"),
]
if syscall is not None:
opts.extend(create_opt("syscall-top", 0))
Expand Down Expand Up @@ -472,6 +475,7 @@ def parse_metrics( # noqa: PLR0915, PLR0912, C901
"bogo_ops_s_usr_sys_time": 0.0,
"cpu_used_per_instance": 0.0,
"rss_max_kb": None,
"stats": {},
"syscall_calls": [],
},
)
Expand Down Expand Up @@ -511,6 +515,7 @@ def parse_metrics( # noqa: PLR0915, PLR0912, C901
"bogo_ops_s_usr_sys_time": 0.0,
"cpu_used_per_instance": 0.0,
"rss_max_kb": None,
"stats": {},
"syscall_calls": [],
},
)
Expand Down Expand Up @@ -540,6 +545,29 @@ def parse_metrics( # noqa: PLR0915, PLR0912, C901
m_untrusty = StressNg.__parse_untrusty(clean_line)
if m_untrusty:
summary_untrusty = m_untrusty
continue

stats = STATS_RE.match(clean_line)
if stats:
stat_counter = stats.group(1).replace(",", "")
stat_name = stats.group(2).strip().replace(" ", "_").replace("-", "_").lower()
target = current_stressor or "stress-ng"
metrics_map.setdefault(
target,
{
"bogo_ops": 0,
"real_time_secs": 0.0,
"usr_time_secs": 0.0,
"sys_time_secs": 0.0,
"bogo_ops_s_real_time": 0.0,
"bogo_ops_s_usr_sys_time": 0.0,
"cpu_used_per_instance": 0.0,
"rss_max_kb": None,
"stats": {},
"syscall_calls": [],
},
)
metrics_map[target]["stats"][stat_name] = int(stat_counter)

metrics: list[StressNGMetrics] = []
for stressor, info in metrics_map.items():
Expand All @@ -560,6 +588,7 @@ def parse_metrics( # noqa: PLR0915, PLR0912, C901
float(info.get("bogo_ops_s_usr_sys_time", -1)),
float(info.get("cpu_used_per_instance", -1)),
int(info["rss_max_kb"]) if info.get("rss_max_kb") is not None else None,
info.get("stats") or None,
top10_slowest,
)
except (ValueError, TypeError) as e:
Expand Down
14 changes: 13 additions & 1 deletion tests/unit/imgtests/exec/loaders/test_stress_ng.py
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Original file line number Diff line number Diff line change
Expand Up @@ -50,6 +50,11 @@
stress-ng: metrc: [999] syscall: open 9.0 1 10
stress-ng: metrc: [999] syscall: close 2.0 1 10
stress-ng: metrc: [999] syscall: read 7.0 1 10
stress-ng: metrc: [999] 5000000000 CPU Clock 0.500 B/sec
stress-ng: metrc: [999] 0 Page Faults Major 0.000 /sec
stress-ng: metrc: [999] 7712 Kmalloc 1.518 K/sec
stress-ng: metrc: [999] 262,244 RCU Utilization 3.809 K/sec
stress-ng: metrc: [999] 3,742,640,922 Cache Misses 54.365 M/sec ( 1.572%)
""",
).strip(),
[
Expand All @@ -63,6 +68,13 @@
1.00,
50.00,
None,
{
"cpu_clock": 5000000000,
"page_faults_major": 0,
"kmalloc": 7712,
"rcu_utilization": 262244,
"cache_misses": 3742640922,
},
(
StressNGSyscallTiming("open", 9.0, 1, 10),
StressNGSyscallTiming("read", 7.0, 1, 10),
Expand All @@ -80,7 +92,7 @@
"Invalid bogo opts format.",
"One stressor with new metrics format.",
"Two stressors with new metrics format.",
"Syscall with syscall-top entries.",
"Syscall with syscall-top and perf entries.",
],
)
def test_parse_metrics(raw_metrics: str, expected: list[StressNGMetrics]) -> None:
Expand Down
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