cli: introduce host-perf-check command (#4342)

polkadot/cli/src/host_perf_check.rs

@@ -0,0 +1,67 @@
+// Copyright 2017-2021 Parity Technologies (UK) Ltd.
+// This file is part of Polkadot.
+
+// Polkadot is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Polkadot is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.
+
+use log::info;
+use polkadot_node_core_pvf::sp_maybe_compressed_blob;
+use polkadot_performance_test::{
+	measure_erasure_coding, measure_pvf_prepare, PerfCheckError, ERASURE_CODING_N_VALIDATORS,
+	ERASURE_CODING_TIME_LIMIT, PVF_PREPARE_TIME_LIMIT, VALIDATION_CODE_BOMB_LIMIT,
+};
+use std::time::Duration;
+
+pub fn host_perf_check() -> Result<(), PerfCheckError> {
+	let wasm_code =
+		polkadot_performance_test::WASM_BINARY.ok_or(PerfCheckError::WasmBinaryMissing)?;
+
+	// Decompress the code before running checks.
+	let code = sp_maybe_compressed_blob::decompress(wasm_code, VALIDATION_CODE_BOMB_LIMIT)
+		.or(Err(PerfCheckError::CodeDecompressionFailed))?;
+
+	info!("Running the performance checks...");
+
+	perf_check("PVF-prepare", PVF_PREPARE_TIME_LIMIT, || measure_pvf_prepare(code.as_ref()))?;
+
+	perf_check("Erasure-coding", ERASURE_CODING_TIME_LIMIT, || {
+		measure_erasure_coding(ERASURE_CODING_N_VALIDATORS, code.as_ref())
+	})?;
+
+	Ok(())
+}
+
+fn green_threshold(duration: Duration) -> Duration {
+	duration * 4 / 5
+}
+
+fn perf_check(
+	test_name: &str,
+	time_limit: Duration,
+	test: impl Fn() -> Result<Duration, PerfCheckError>,
+) -> Result<(), PerfCheckError> {
+	let elapsed = test()?;
+
+	if elapsed < green_threshold(time_limit) {
+		info!("🟢 {} performance check passed, elapsed: {:?}", test_name, elapsed);
+		Ok(())
+	} else if elapsed <= time_limit {
+		info!(
+			"🟡 {} performance check passed, {:?} limit almost exceeded, elapsed: {:?}",
+			test_name, time_limit, elapsed
+		);
+		Ok(())
+	} else {
+		Err(PerfCheckError::TimeOut { elapsed, limit: time_limit })
+	}
+}