1 /* 2 * Copyright (C) 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <inttypes.h> 18 #include <sys/types.h> 19 20 #define BPF_FS_PATH "/sys/fs/bpf/" 21 22 // Number of frequencies tracked in the array with total time. If some CPUs have 23 // more than 64 freqs 24 // // available, the overflow is stored in the last entry. 25 #define MAX_FREQS_FOR_TOTAL 64 26 // Number of frequencies for which a UID's times can be tracked in a single map entry. If some CPUs 27 // have more than 32 freqs available, a single UID is tracked using 2 or more entries. 28 #define FREQS_PER_ENTRY 32 29 // Number of distinct CPU counts for which a UID's concurrent time stats can be tracked in a single 30 // map entry. On systems with more than 8 CPUs, a single UID is tracked using 2 or more entries. 31 #define CPUS_PER_ENTRY 8 32 33 typedef struct { 34 uint32_t uid; 35 uint32_t bucket; 36 } time_key_t; 37 38 typedef struct { 39 uint64_t ar[FREQS_PER_ENTRY]; 40 } tis_val_t; 41 42 typedef struct { 43 uint64_t active[CPUS_PER_ENTRY]; 44 uint64_t policy[CPUS_PER_ENTRY]; 45 } concurrent_val_t; 46 47 typedef struct { 48 uint32_t policy; 49 uint32_t freq; 50 } freq_idx_key_t; 51 52 // Maximum number of processes whose thread CPU time-in-state can be tracked simultaneously. 53 #define MAX_TRACKED_PIDS 8 54 55 // Indicates that the pid_tracked_map item is unused and further items in the array are also 56 // unused 57 #define TRACKED_PID_STATE_UNUSED 0 58 // Indicates that the pid_tracked_map item contains a PID that is currently tracked 59 #define TRACKED_PID_STATE_ACTIVE 1 60 // Indicates that the pid_tracked_map item is vacant, but further items in the array may 61 // contain tracked PIDs 62 #define TRACKED_PID_STATE_EXITED 2 63 64 typedef struct { 65 pid_t pid; 66 // TRACKED_PID_STATE_UNUSED, TRACKED_PID_STATE_ACTIVE or TRACKED_PID_STATE_EXITED 67 uint8_t state; 68 } tracked_pid_t; 69 70 typedef struct { 71 pid_t tgid; 72 uint16_t aggregation_key; 73 uint16_t bucket; 74 } aggregated_task_tis_key_t; 75