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222 lines
7.1 KiB
222 lines
7.1 KiB
/* SPDX-License-Identifier: LGPL-2.1 WITH Linux-syscall-note */ |
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/* taskstats.h - exporting per-task statistics |
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* |
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* Copyright (C) Shailabh Nagar, IBM Corp. 2006 |
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* (C) Balbir Singh, IBM Corp. 2006 |
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* (C) Jay Lan, SGI, 2006 |
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* |
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* This program is free software; you can redistribute it and/or modify it |
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* under the terms of version 2.1 of the GNU Lesser General Public License |
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* as published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it would be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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*/ |
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#ifndef _LINUX_TASKSTATS_H |
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#define _LINUX_TASKSTATS_H |
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#include <linux/types.h> |
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/* Format for per-task data returned to userland when |
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* - a task exits |
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* - listener requests stats for a task |
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* |
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* The struct is versioned. Newer versions should only add fields to |
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* the bottom of the struct to maintain backward compatibility. |
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* |
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* |
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* To add new fields |
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* a) bump up TASKSTATS_VERSION |
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* b) add comment indicating new version number at end of struct |
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* c) add new fields after version comment; maintain 64-bit alignment |
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*/ |
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#define TASKSTATS_VERSION 10 |
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#define TS_COMM_LEN 32 /* should be >= TASK_COMM_LEN |
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* in linux/sched.h */ |
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struct taskstats { |
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/* The version number of this struct. This field is always set to |
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* TAKSTATS_VERSION, which is defined in <linux/taskstats.h>. |
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* Each time the struct is changed, the value should be incremented. |
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*/ |
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__u16 version; |
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__u32 ac_exitcode; /* Exit status */ |
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/* The accounting flags of a task as defined in <linux/acct.h> |
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* Defined values are AFORK, ASU, ACOMPAT, ACORE, and AXSIG. |
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*/ |
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__u8 ac_flag; /* Record flags */ |
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__u8 ac_nice; /* task_nice */ |
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/* Delay accounting fields start |
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* |
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* All values, until comment "Delay accounting fields end" are |
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* available only if delay accounting is enabled, even though the last |
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* few fields are not delays |
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* |
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* xxx_count is the number of delay values recorded |
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* xxx_delay_total is the corresponding cumulative delay in nanoseconds |
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* |
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* xxx_delay_total wraps around to zero on overflow |
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* xxx_count incremented regardless of overflow |
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*/ |
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/* Delay waiting for cpu, while runnable |
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* count, delay_total NOT updated atomically |
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*/ |
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__u64 cpu_count __attribute__((aligned(8))); |
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__u64 cpu_delay_total; |
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/* Following four fields atomically updated using task->delays->lock */ |
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/* Delay waiting for synchronous block I/O to complete |
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* does not account for delays in I/O submission |
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*/ |
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__u64 blkio_count; |
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__u64 blkio_delay_total; |
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/* Delay waiting for page fault I/O (swap in only) */ |
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__u64 swapin_count; |
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__u64 swapin_delay_total; |
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/* cpu "wall-clock" running time |
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* On some architectures, value will adjust for cpu time stolen |
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* from the kernel in involuntary waits due to virtualization. |
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* Value is cumulative, in nanoseconds, without a corresponding count |
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* and wraps around to zero silently on overflow |
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*/ |
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__u64 cpu_run_real_total; |
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/* cpu "virtual" running time |
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* Uses time intervals seen by the kernel i.e. no adjustment |
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* for kernel's involuntary waits due to virtualization. |
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* Value is cumulative, in nanoseconds, without a corresponding count |
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* and wraps around to zero silently on overflow |
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*/ |
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__u64 cpu_run_virtual_total; |
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/* Delay accounting fields end */ |
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/* version 1 ends here */ |
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/* Basic Accounting Fields start */ |
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char ac_comm[TS_COMM_LEN]; /* Command name */ |
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__u8 ac_sched __attribute__((aligned(8))); |
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/* Scheduling discipline */ |
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__u8 ac_pad[3]; |
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__u32 ac_uid __attribute__((aligned(8))); |
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/* User ID */ |
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__u32 ac_gid; /* Group ID */ |
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__u32 ac_pid; /* Process ID */ |
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__u32 ac_ppid; /* Parent process ID */ |
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/* __u32 range means times from 1970 to 2106 */ |
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__u32 ac_btime; /* Begin time [sec since 1970] */ |
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__u64 ac_etime __attribute__((aligned(8))); |
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/* Elapsed time [usec] */ |
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__u64 ac_utime; /* User CPU time [usec] */ |
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__u64 ac_stime; /* SYstem CPU time [usec] */ |
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__u64 ac_minflt; /* Minor Page Fault Count */ |
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__u64 ac_majflt; /* Major Page Fault Count */ |
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/* Basic Accounting Fields end */ |
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/* Extended accounting fields start */ |
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/* Accumulated RSS usage in duration of a task, in MBytes-usecs. |
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* The current rss usage is added to this counter every time |
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* a tick is charged to a task's system time. So, at the end we |
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* will have memory usage multiplied by system time. Thus an |
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* average usage per system time unit can be calculated. |
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*/ |
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__u64 coremem; /* accumulated RSS usage in MB-usec */ |
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/* Accumulated virtual memory usage in duration of a task. |
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* Same as acct_rss_mem1 above except that we keep track of VM usage. |
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*/ |
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__u64 virtmem; /* accumulated VM usage in MB-usec */ |
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/* High watermark of RSS and virtual memory usage in duration of |
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* a task, in KBytes. |
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*/ |
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__u64 hiwater_rss; /* High-watermark of RSS usage, in KB */ |
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__u64 hiwater_vm; /* High-water VM usage, in KB */ |
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/* The following four fields are I/O statistics of a task. */ |
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__u64 read_char; /* bytes read */ |
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__u64 write_char; /* bytes written */ |
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__u64 read_syscalls; /* read syscalls */ |
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__u64 write_syscalls; /* write syscalls */ |
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/* Extended accounting fields end */ |
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#define TASKSTATS_HAS_IO_ACCOUNTING |
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/* Per-task storage I/O accounting starts */ |
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__u64 read_bytes; /* bytes of read I/O */ |
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__u64 write_bytes; /* bytes of write I/O */ |
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__u64 cancelled_write_bytes; /* bytes of cancelled write I/O */ |
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__u64 nvcsw; /* voluntary_ctxt_switches */ |
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__u64 nivcsw; /* nonvoluntary_ctxt_switches */ |
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/* time accounting for SMT machines */ |
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__u64 ac_utimescaled; /* utime scaled on frequency etc */ |
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__u64 ac_stimescaled; /* stime scaled on frequency etc */ |
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__u64 cpu_scaled_run_real_total; /* scaled cpu_run_real_total */ |
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/* Delay waiting for memory reclaim */ |
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__u64 freepages_count; |
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__u64 freepages_delay_total; |
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/* Delay waiting for thrashing page */ |
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__u64 thrashing_count; |
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__u64 thrashing_delay_total; |
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/* v10: 64-bit btime to avoid overflow */ |
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__u64 ac_btime64; /* 64-bit begin time */ |
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}; |
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/* |
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* Commands sent from userspace |
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* Not versioned. New commands should only be inserted at the enum's end |
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* prior to __TASKSTATS_CMD_MAX |
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*/ |
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enum { |
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TASKSTATS_CMD_UNSPEC = 0, /* Reserved */ |
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TASKSTATS_CMD_GET, /* user->kernel request/get-response */ |
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TASKSTATS_CMD_NEW, /* kernel->user event */ |
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__TASKSTATS_CMD_MAX, |
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}; |
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#define TASKSTATS_CMD_MAX (__TASKSTATS_CMD_MAX - 1) |
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enum { |
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TASKSTATS_TYPE_UNSPEC = 0, /* Reserved */ |
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TASKSTATS_TYPE_PID, /* Process id */ |
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TASKSTATS_TYPE_TGID, /* Thread group id */ |
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TASKSTATS_TYPE_STATS, /* taskstats structure */ |
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TASKSTATS_TYPE_AGGR_PID, /* contains pid + stats */ |
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TASKSTATS_TYPE_AGGR_TGID, /* contains tgid + stats */ |
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TASKSTATS_TYPE_NULL, /* contains nothing */ |
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__TASKSTATS_TYPE_MAX, |
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}; |
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#define TASKSTATS_TYPE_MAX (__TASKSTATS_TYPE_MAX - 1) |
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enum { |
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TASKSTATS_CMD_ATTR_UNSPEC = 0, |
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TASKSTATS_CMD_ATTR_PID, |
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TASKSTATS_CMD_ATTR_TGID, |
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TASKSTATS_CMD_ATTR_REGISTER_CPUMASK, |
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TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK, |
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__TASKSTATS_CMD_ATTR_MAX, |
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}; |
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#define TASKSTATS_CMD_ATTR_MAX (__TASKSTATS_CMD_ATTR_MAX - 1) |
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/* NETLINK_GENERIC related info */ |
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#define TASKSTATS_GENL_NAME "TASKSTATS" |
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#define TASKSTATS_GENL_VERSION 0x1 |
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#endif /* _LINUX_TASKSTATS_H */
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