Merge "libtimeinstate: initialize current freq before starting tracking" am: 835546fa3d (9e8e6451) · Commits · e / os / android_frameworks_native-old

libs/cputimeinstate/cputimeinstate.cpp

+14 −1

Original line number	Diff line number	Diff line
		@@ -161,6 +161,17 @@ static bool attachTracepointProgram(const std::string &eventType, const std::str
		return bpf_attach_tracepoint(prog_fd, eventType.c_str(), eventName.c_str()) >= 0;
		}

		static std::optional<uint32_t> getPolicyFreqIdx(uint32_t policy) {
		auto path = StringPrintf("/sys/devices/system/cpu/cpufreq/policy%u/scaling_cur_freq",
		gPolicyCpus[policy][0]);
		auto freqVec = readNumbersFromFile(path);
		if (!freqVec.has_value() \|\| freqVec->size() != 1) return {};
		for (uint32_t idx = 0; idx < gPolicyFreqs[policy].size(); ++idx) {
		if ((*freqVec)[0] == gPolicyFreqs[policy][idx]) return idx + 1;
		}
		return {};
		}

		// Start tracking and aggregating data to be reported by getUidCpuFreqTimes and getUidsCpuFreqTimes.
		// Returns true on success, false otherwise.
		// Tracking is active only once a live process has successfully called this function; if the calling
		@@ -215,7 +226,9 @@ bool startTrackingUidTimes() {
		unique_fd policyFreqIdxFd(bpf_obj_get_wronly(BPF_FS_PATH "map_time_in_state_policy_freq_idx_map"));
		if (policyFreqIdxFd < 0) return false;
		for (uint32_t i = 0; i < gNPolicies; ++i) {
		if (writeToMapEntry(policyFreqIdxFd, &i, &zero, BPF_ANY)) return false;
		auto freqIdx = getPolicyFreqIdx(i);
		if (!freqIdx.has_value()) return false;
		if (writeToMapEntry(policyFreqIdxFd, &i, &(*freqIdx), BPF_ANY)) return false;
		}

		gTracking = attachTracepointProgram("sched", "sched_switch") &&