1 /* SPDX-License-Identifier: LGPL-2.1 WITH Linux-syscall-note */ 2 /* taskstats.h - exporting per-task statistics 3 * 4 * Copyright (C) Shailabh Nagar, IBM Corp. 2006 5 * (C) Balbir Singh, IBM Corp. 2006 6 * (C) Jay Lan, SGI, 2006 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of version 2.1 of the GNU Lesser General Public License 10 * as published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope that it would be useful, but 13 * WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 15 */ 16 17 #ifndef _LINUX_TASKSTATS_H 18 #define _LINUX_TASKSTATS_H 19 20 #include <linux/types.h> 21 22 /* Format for per-task data returned to userland when 23 * - a task exits 24 * - listener requests stats for a task 25 * 26 * The struct is versioned. Newer versions should only add fields to 27 * the bottom of the struct to maintain backward compatibility. 28 * 29 * 30 * To add new fields 31 * a) bump up TASKSTATS_VERSION 32 * b) add comment indicating new version number at end of struct 33 * c) add new fields after version comment; maintain 64-bit alignment 34 */ 35 36 37 #define TASKSTATS_VERSION 14 38 #define TS_COMM_LEN 32 /* should be >= TASK_COMM_LEN 39 * in linux/sched.h */ 40 41 struct taskstats { 42 43 /* The version number of this struct. This field is always set to 44 * TAKSTATS_VERSION, which is defined in <linux/taskstats.h>. 45 * Each time the struct is changed, the value should be incremented. 46 */ 47 __u16 version; 48 __u32 ac_exitcode; /* Exit status */ 49 50 /* The accounting flags of a task as defined in <linux/acct.h> 51 * Defined values are AFORK, ASU, ACOMPAT, ACORE, AXSIG, and AGROUP. 52 * (AGROUP since version 12). 53 */ 54 __u8 ac_flag; /* Record flags */ 55 __u8 ac_nice; /* task_nice */ 56 57 /* Delay accounting fields start 58 * 59 * All values, until comment "Delay accounting fields end" are 60 * available only if delay accounting is enabled, even though the last 61 * few fields are not delays 62 * 63 * xxx_count is the number of delay values recorded 64 * xxx_delay_total is the corresponding cumulative delay in nanoseconds 65 * 66 * xxx_delay_total wraps around to zero on overflow 67 * xxx_count incremented regardless of overflow 68 */ 69 70 /* Delay waiting for cpu, while runnable 71 * count, delay_total NOT updated atomically 72 */ 73 __u64 cpu_count __attribute__((aligned(8))); 74 __u64 cpu_delay_total; 75 76 /* Following four fields atomically updated using task->delays->lock */ 77 78 /* Delay waiting for synchronous block I/O to complete 79 * does not account for delays in I/O submission 80 */ 81 __u64 blkio_count; 82 __u64 blkio_delay_total; 83 84 /* Delay waiting for page fault I/O (swap in only) */ 85 __u64 swapin_count; 86 __u64 swapin_delay_total; 87 88 /* cpu "wall-clock" running time 89 * On some architectures, value will adjust for cpu time stolen 90 * from the kernel in involuntary waits due to virtualization. 91 * Value is cumulative, in nanoseconds, without a corresponding count 92 * and wraps around to zero silently on overflow 93 */ 94 __u64 cpu_run_real_total; 95 96 /* cpu "virtual" running time 97 * Uses time intervals seen by the kernel i.e. no adjustment 98 * for kernel's involuntary waits due to virtualization. 99 * Value is cumulative, in nanoseconds, without a corresponding count 100 * and wraps around to zero silently on overflow 101 */ 102 __u64 cpu_run_virtual_total; 103 /* Delay accounting fields end */ 104 /* version 1 ends here */ 105 106 /* Basic Accounting Fields start */ 107 char ac_comm[TS_COMM_LEN]; /* Command name */ 108 __u8 ac_sched __attribute__((aligned(8))); 109 /* Scheduling discipline */ 110 __u8 ac_pad[3]; 111 __u32 ac_uid __attribute__((aligned(8))); 112 /* User ID */ 113 __u32 ac_gid; /* Group ID */ 114 __u32 ac_pid; /* Process ID */ 115 __u32 ac_ppid; /* Parent process ID */ 116 /* __u32 range means times from 1970 to 2106 */ 117 __u32 ac_btime; /* Begin time [sec since 1970] */ 118 __u64 ac_etime __attribute__((aligned(8))); 119 /* Elapsed time [usec] */ 120 __u64 ac_utime; /* User CPU time [usec] */ 121 __u64 ac_stime; /* SYstem CPU time [usec] */ 122 __u64 ac_minflt; /* Minor Page Fault Count */ 123 __u64 ac_majflt; /* Major Page Fault Count */ 124 /* Basic Accounting Fields end */ 125 126 /* Extended accounting fields start */ 127 /* Accumulated RSS usage in duration of a task, in MBytes-usecs. 128 * The current rss usage is added to this counter every time 129 * a tick is charged to a task's system time. So, at the end we 130 * will have memory usage multiplied by system time. Thus an 131 * average usage per system time unit can be calculated. 132 */ 133 __u64 coremem; /* accumulated RSS usage in MB-usec */ 134 /* Accumulated virtual memory usage in duration of a task. 135 * Same as acct_rss_mem1 above except that we keep track of VM usage. 136 */ 137 __u64 virtmem; /* accumulated VM usage in MB-usec */ 138 139 /* High watermark of RSS and virtual memory usage in duration of 140 * a task, in KBytes. 141 */ 142 __u64 hiwater_rss; /* High-watermark of RSS usage, in KB */ 143 __u64 hiwater_vm; /* High-water VM usage, in KB */ 144 145 /* The following four fields are I/O statistics of a task. */ 146 __u64 read_char; /* bytes read */ 147 __u64 write_char; /* bytes written */ 148 __u64 read_syscalls; /* read syscalls */ 149 __u64 write_syscalls; /* write syscalls */ 150 /* Extended accounting fields end */ 151 152 #define TASKSTATS_HAS_IO_ACCOUNTING 153 /* Per-task storage I/O accounting starts */ 154 __u64 read_bytes; /* bytes of read I/O */ 155 __u64 write_bytes; /* bytes of write I/O */ 156 __u64 cancelled_write_bytes; /* bytes of cancelled write I/O */ 157 158 __u64 nvcsw; /* voluntary_ctxt_switches */ 159 __u64 nivcsw; /* nonvoluntary_ctxt_switches */ 160 161 /* time accounting for SMT machines */ 162 __u64 ac_utimescaled; /* utime scaled on frequency etc */ 163 __u64 ac_stimescaled; /* stime scaled on frequency etc */ 164 __u64 cpu_scaled_run_real_total; /* scaled cpu_run_real_total */ 165 166 /* Delay waiting for memory reclaim */ 167 __u64 freepages_count; 168 __u64 freepages_delay_total; 169 170 /* Delay waiting for thrashing page */ 171 __u64 thrashing_count; 172 __u64 thrashing_delay_total; 173 174 /* v10: 64-bit btime to avoid overflow */ 175 __u64 ac_btime64; /* 64-bit begin time */ 176 177 /* v11: Delay waiting for memory compact */ 178 __u64 compact_count; 179 __u64 compact_delay_total; 180 181 /* v12 begin */ 182 __u32 ac_tgid; /* thread group ID */ 183 /* Thread group walltime up to now. This is total process walltime if 184 * AGROUP flag is set. 185 */ 186 __u64 ac_tgetime __attribute__((aligned(8))); 187 /* Lightweight information to identify process binary files. 188 * This leaves userspace to match this to a file system path, using 189 * MAJOR() and MINOR() macros to identify a device and mount point, 190 * the inode to identify the executable file. This is /proc/self/exe 191 * at the end, so matching the most recent exec(). Values are zero 192 * for kernel threads. 193 */ 194 __u64 ac_exe_dev; /* program binary device ID */ 195 __u64 ac_exe_inode; /* program binary inode number */ 196 /* v12 end */ 197 198 /* v13: Delay waiting for write-protect copy */ 199 __u64 wpcopy_count; 200 __u64 wpcopy_delay_total; 201 202 /* v14: Delay waiting for IRQ/SOFTIRQ */ 203 __u64 irq_count; 204 __u64 irq_delay_total; 205 }; 206 207 208 /* 209 * Commands sent from userspace 210 * Not versioned. New commands should only be inserted at the enum's end 211 * prior to __TASKSTATS_CMD_MAX 212 */ 213 214 enum { 215 TASKSTATS_CMD_UNSPEC = 0, /* Reserved */ 216 TASKSTATS_CMD_GET, /* user->kernel request/get-response */ 217 TASKSTATS_CMD_NEW, /* kernel->user event */ 218 __TASKSTATS_CMD_MAX, 219 }; 220 221 #define TASKSTATS_CMD_MAX (__TASKSTATS_CMD_MAX - 1) 222 223 enum { 224 TASKSTATS_TYPE_UNSPEC = 0, /* Reserved */ 225 TASKSTATS_TYPE_PID, /* Process id */ 226 TASKSTATS_TYPE_TGID, /* Thread group id */ 227 TASKSTATS_TYPE_STATS, /* taskstats structure */ 228 TASKSTATS_TYPE_AGGR_PID, /* contains pid + stats */ 229 TASKSTATS_TYPE_AGGR_TGID, /* contains tgid + stats */ 230 TASKSTATS_TYPE_NULL, /* contains nothing */ 231 __TASKSTATS_TYPE_MAX, 232 }; 233 234 #define TASKSTATS_TYPE_MAX (__TASKSTATS_TYPE_MAX - 1) 235 236 enum { 237 TASKSTATS_CMD_ATTR_UNSPEC = 0, 238 TASKSTATS_CMD_ATTR_PID, 239 TASKSTATS_CMD_ATTR_TGID, 240 TASKSTATS_CMD_ATTR_REGISTER_CPUMASK, 241 TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK, 242 __TASKSTATS_CMD_ATTR_MAX, 243 }; 244 245 #define TASKSTATS_CMD_ATTR_MAX (__TASKSTATS_CMD_ATTR_MAX - 1) 246 247 /* NETLINK_GENERIC related info */ 248 249 #define TASKSTATS_GENL_NAME "TASKSTATS" 250 #define TASKSTATS_GENL_VERSION 0x1 251 252 #endif /* _LINUX_TASKSTATS_H */ 253