0 *l4( (  fB- y _I|+ /* SPDX-License-Identifier: LGPL-2.1 WITH Linux-syscall-note */ /* taskstats.h - exporting per-task statistics * * Copyright (C) Shailabh Nagar, IBM Corp. 2006 * (C) Balbir Singh, IBM Corp. 2006 * (C) Jay Lan, SGI, 2006 * * This program is free software; you can redistribute it and/or modify it * under the terms of version 2.1 of the GNU Lesser General Public License * as published by the Free Software Foundation. * * This program is distributed in the hope that it would be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. */ #ifndef _LINUX_TASKSTATS_H #define _LINUX_TASKSTATS_H #include /* Format for per-task data returned to userland when * - a task exits * - listener requests stats for a task * * The struct is versioned. Newer versions should only add fields to * the bottom of the struct to maintain backward compatibility. * * * To add new fields * a) bump up TASKSTATS_VERSION * b) add comment indicating new version number at end of struct * c) add new fields after version comment; maintain 64-bit alignment */ #define TASKSTATS_VERSION 14 #define TS_COMM_LEN 32 /* should be >= TASK_COMM_LEN * in linux/sched.h */ struct taskstats { /* The version number of this struct. This field is always set to * TAKSTATS_VERSION, which is defined in . * Each time the struct is changed, the value should be incremented. */ __u16 version; __u32 ac_exitcode; /* Exit status */ /* The accounting flags of a task as defined in * Defined values are AFORK, ASU, ACOMPAT, ACORE, AXSIG, and AGROUP. * (AGROUP since version 12). */ __u8 ac_flag; /* Record flags */ __u8 ac_nice; /* task_nice */ /* Delay accounting fields start * * All values, until comment "Delay accounting fields end" are * available only if delay accounting is enabled, even though the last * few fields are not delays * * xxx_count is the number of delay values recorded * xxx_delay_total is the corresponding cumulative delay in nanoseconds * * xxx_delay_total wraps around to zero on overflow * xxx_count incremented regardless of overflow */ /* Delay waiting for cpu, while runnable * count, delay_total NOT updated atomically */ __u64 cpu_count __attribute__((aligned(8))); __u64 cpu_delay_total; /* Following four fields atomically updated using task->delays->lock */ /* Delay waiting for synchronous block I/O to complete * does not account for delays in I/O submission */ __u64 blkio_count; __u64 blkio_delay_total; /* Delay waiting for page fault I/O (swap in only) */ __u64 swapin_count; __u64 swapin_delay_total; /* cpu "wall-clock" running time * On some architectures, value will adjust for cpu time stolen * from the kernel in involuntary waits due to virtualization. * Value is cumulative, in nanoseconds, without a corresponding count * and wraps around to zero silently on overflow */ __u64 cpu_run_real_total; /* cpu "virtual" running time * Uses time intervals seen by the kernel i.e. no adjustment * for kernel's involuntary waits due to virtualization. * Value is cumulative, in nanoseconds, without a corresponding count * and wraps around to zero silently on overflow */ __u64 cpu_run_virtual_total; /* Delay accounting fields end */ /* version 1 ends here */ /* Basic Accounting Fields start */ char ac_comm[TS_COMM_LEN]; /* Command name */ __u8 ac_sched __attribute__((aligned(8))); /* Scheduling discipline */ __u8 ac_pad[3]; __u32 ac_uid __attribute__((aligned(8))); /* User ID */ __u32 ac_gid; /* Group ID */ __u32 ac_pid; /* Process ID */ __u32 ac_ppid; /* Parent process ID */ /* __u32 range means times from 1970 to 2106 */ __u32 ac_btime; /* Begin time [sec since 1970] */ __u64 ac_etime __attribute__((aligned(8))); /* Elapsed time [usec] */ __u64 ac_utime; /* User CPU time [usec] */ __u64 ac_stime; /