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1/* SPDX-License-Identifier: LGPL-2.1 WITH Linux-syscall-note */2/* taskstats.h - exporting per-task statistics3 *4 * Copyright (C) Shailabh Nagar, IBM Corp. 20065 * (C) Balbir Singh, IBM Corp. 20066 * (C) Jay Lan, SGI, 20067 *8 * This program is free software; you can redistribute it and/or modify it9 * under the terms of version 2.1 of the GNU Lesser General Public License10 * as published by the Free Software Foundation.11 *12 * This program is distributed in the hope that it would be useful, but13 * WITHOUT ANY WARRANTY; without even the implied warranty of14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.15 */16 17#ifndef _LINUX_TASKSTATS_H18#define _LINUX_TASKSTATS_H19 20#include <linux/types.h>21 22/* Format for per-task data returned to userland when23 * - a task exits24 * - listener requests stats for a task25 *26 * The struct is versioned. Newer versions should only add fields to27 * the bottom of the struct to maintain backward compatibility.28 *29 *30 * To add new fields31 * a) bump up TASKSTATS_VERSION32 * b) add comment indicating new version number at end of struct33 * c) add new fields after version comment; maintain 64-bit alignment34 */35 36 37#define TASKSTATS_VERSION 1438#define TS_COMM_LEN 32 /* should be >= TASK_COMM_LEN39 * in linux/sched.h */40 41struct taskstats {42 43 /* The version number of this struct. This field is always set to44 * 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 start58 *59 * All values, until comment "Delay accounting fields end" are60 * available only if delay accounting is enabled, even though the last61 * few fields are not delays62 *63 * xxx_count is the number of delay values recorded64 * xxx_delay_total is the corresponding cumulative delay in nanoseconds65 *66 * xxx_delay_total wraps around to zero on overflow67 * xxx_count incremented regardless of overflow68 */69 70 /* Delay waiting for cpu, while runnable71 * count, delay_total NOT updated atomically72 */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 complete79 * does not account for delays in I/O submission80 */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 time89 * On some architectures, value will adjust for cpu time stolen90 * from the kernel in involuntary waits due to virtualization.91 * Value is cumulative, in nanoseconds, without a corresponding count92 * and wraps around to zero silently on overflow93 */94 __u64 cpu_run_real_total;95 96 /* cpu "virtual" running time97 * Uses time intervals seen by the kernel i.e. no adjustment98 * for kernel's involuntary waits due to virtualization.99 * Value is cumulative, in nanoseconds, without a corresponding count100 * and wraps around to zero silently on overflow101 */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 time129 * a tick is charged to a task's system time. So, at the end we130 * will have memory usage multiplied by system time. Thus an131 * 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 of140 * 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_ACCOUNTING153 /* 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 if184 * 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, using189 * MAJOR() and MINOR() macros to identify a device and mount point,190 * the inode to identify the executable file. This is /proc/self/exe191 * at the end, so matching the most recent exec(). Values are zero192 * 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 userspace210 * Not versioned. New commands should only be inserted at the enum's end211 * prior to __TASKSTATS_CMD_MAX212 */213 214enum {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 223enum {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 236enum {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 0x1251 252#endif /* _LINUX_TASKSTATS_H */253