Merge "Functions to log stats log from LMKD." (b17ce35c) · Commits · e / os / android_system_core

lmkd/Android.bp

+12 −0

Original line number	Diff line number	Diff line
		@@ -18,3 +18,15 @@ cc_binary {
		},
		},
		}

		cc_library_shared {
		name: "libstatslogc",
		srcs: ["statslog.c"],
		cflags: [
		"-Wall",
		"-Werror",
		],
		shared_libs: [
		"liblog",
		],
		}

lmkd/statslog.c

0 → 100644

+100 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright 2018 Google, Inc
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		#include <assert.h>
		#include <errno.h>
		#include <log/log_event_list.h>
		#include <log/log_id.h>

		/**
		* Logs the change in LMKD state which is used as start/stop boundaries for logging
		* LMK_KILL_OCCURRED event.
		* Code: LMK_STATE_CHANGED = 54
		*/
		int
		stats_write_lmk_state_changed(android_log_context ctx, int32_t code, int32_t state) {
		assert(ctx != NULL);
		int ret = -EINVAL;
		if (!ctx) {
		return ret;
		}

		if ((ret = android_log_write_int32(ctx, code)) < 0) {
		return ret;
		}

		if ((ret = android_log_write_int32(ctx, state)) < 0) {
		return ret;
		}
		return ret;
		}

		/**
		* Logs the event when LMKD kills a process to reduce memory pressure.
		* Code: LMK_KILL_OCCURRED = 51
		*/
		int
		stats_write_lmk_kill_occurred(android_log_context ctx, int32_t code, int32_t uid,
		char const* process_name, int32_t oom_score, int64_t pgfault,
		int64_t pgmajfault, int64_t rss_in_bytes, int64_t cache_in_bytes,
		int64_t swap_in_bytes) {
		assert(ctx != NULL);
		int ret = -EINVAL;
		if (!ctx) {
		return ret;
		}

		if ((ret = android_log_write_int32(ctx, code)) < 0) {
		return ret;
		}

		if ((ret = android_log_write_int32(ctx, uid)) < 0) {
		return ret;
		}

		if ((ret = android_log_write_string8(ctx, (process_name == NULL) ? "" : process_name)) < 0) {
		return ret;
		}

		if ((ret = android_log_write_int32(ctx, oom_score)) < 0) {
		return ret;
		}

		if ((ret = android_log_write_int64(ctx, pgfault)) < 0) {
		return ret;
		}

		if ((ret = android_log_write_int64(ctx, pgmajfault)) < 0) {
		return ret;
		}

		if ((ret = android_log_write_int64(ctx, rss_in_bytes)) < 0) {
		return ret;
		}

		if ((ret = android_log_write_int64(ctx, cache_in_bytes)) < 0) {
		return ret;
		}

		if ((ret = android_log_write_int64(ctx, swap_in_bytes)) < 0) {
		return ret;
		}

		if ((ret = android_log_write_list(ctx, LOG_ID_STATS)) < 0) {
		return ret;
		}
		return ret;
		}

lmkd/statslog.h

0 → 100644

+39 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright 2018 Google, Inc
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		#pragma once

		#include <sys/cdefs.h>
		__BEGIN_DECLS

		/**
		* Logs the change in LMKD state which is used as start/stop boundaries for logging
		* LMK_KILL_OCCURRED event.
		* Code: LMK_STATE_CHANGED = 54
		*/
		int
		stats_write_lmk_state_changed(android_log_context ctx, int32_t code, int32_t state);

		/**
		* Logs the event when LMKD kills a process to reduce memory pressure.
		* Code: LMK_KILL_OCCURRED = 51
		*/
		int
		stats_write_lmk_kill_occurred(android_log_context ctx, int32_t code, int32_t uid,
		char const* process_name, int32_t oom_score, int64_t pgfault,
		int64_t pgmajfault, int64_t rss_in_bytes, int64_t cache_in_bytes,
		int64_t swap_in_bytes);
		__END_DECLS