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| author | Yabin Cui <yabinc@google.com> | 2022-02-17 09:57:42 -0800 |
|---|---|---|
| committer | Yabin Cui <yabinc@google.com> | 2022-02-17 10:26:53 -0800 |
| commit | 0d539c167b5caaa2730e4dc3c53034a652bcee51 (patch) | |
| tree | 4b8acbe4ec19e503854f337fdd43b0b9e223bea4 | |
| parent | 2719ff2971b7a8f45ad43b172b05bba030ee3d6b (diff) | |
| download | extras-0d539c167b5caaa2730e4dc3c53034a652bcee51.tar.gz | |
profcollectd: add wakelock when recording ETM data.
The kernel may panic when trying to hibernate or hotplug
CPUs while collecting ETM data. So get wakelock to keep
the CPUs on.
Bug: 219934028
Test: run profcollectd and
Test: dumpsys suspend_control_internal --wakelocks
Change-Id: Ie1fea2b6d82d3e27d8b9553aa3967876ff7316ca
| -rw-r--r-- | simpleperf/Android.bp | 5 | ||||
| -rw-r--r-- | simpleperf/profcollect.cpp | 8 |
2 files changed, 12 insertions, 1 deletions
diff --git a/simpleperf/Android.bp b/simpleperf/Android.bp index ba4ef198..a24eed9b 100644 --- a/simpleperf/Android.bp +++ b/simpleperf/Android.bp @@ -328,7 +328,10 @@ cc_library { srcs: ["profcollect.cpp"], host_supported: false, static_libs: ["libsimpleperf"], - shared_libs: ["libLLVM_android"], + shared_libs: [ + "libLLVM_android", + "libpower", + ], } rust_bindgen { diff --git a/simpleperf/profcollect.cpp b/simpleperf/profcollect.cpp index 39c04ab7..724111e8 100644 --- a/simpleperf/profcollect.cpp +++ b/simpleperf/profcollect.cpp @@ -14,6 +14,7 @@ * limitations under the License. */ +#include <wakelock/wakelock.h> #include <include/simpleperf_profcollect.hpp> #include "ETMRecorder.h" @@ -42,6 +43,13 @@ bool HasDeviceSupport() { } bool Record(const char* event_name, const char* output, float duration) { + // The kernel may panic when trying to hibernate or hotplug CPUs while collecting + // ETM data. So get wakelock to keep the CPUs on. + auto wakelock = android::wakelock::WakeLock::tryGet("profcollectd"); + if (!wakelock) { + LOG(ERROR) << "Failed to request wakelock."; + return false; + } auto recordCmd = CreateCommandInstance("record"); std::vector<std::string> args; args.push_back("-a"); |