199 lines
6.3 KiB
C
199 lines
6.3 KiB
C
/* 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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/* 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 4
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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 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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};
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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_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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