tequilaOS/platform_frameworks_native
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Merge "libtimeinstate: initialize current freq before starting tracking" am: 835546fa3d

Browse source 
Change-Id: I7bdd76809552e29149cf50bdf3975a676422f036
This commit is contained in:
Automerger Merge Worker 2020-02-20 02:04:30 +00:00
commit 9e8e645152
1 changed files with 14 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

15
libs/cputimeinstate/cputimeinstate.cpp
View file

@ -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") &&