| /* 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 <linux/types.h> |
| |
| /* 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 8 |
| #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 <linux/taskstats.h>. |
| * 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 <linux/acct.h> |
| * Defined values are AFORK, ASU, ACOMPAT, ACORE, and AXSIG. |
| */ |
| __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 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; /* SYstem CPU time [usec] */ |
| __u64 ac_minflt; /* Minor Page Fault Count */ |
| __u64 ac_majflt; /* Major Page Fault Count */ |
| /* Basic Accounting Fields end */ |
| |
| /* Extended accounting fields start */ |
| /* Accumulated RSS usage in duration of a task, in MBytes-usecs. |
| * The current rss usage is added to this counter every time |
| * a tick is charged to a task's system time. So, at the end we |
| * will have memory usage multiplied by system time. Thus an |
| * average usage per system time unit can be calculated. |
| */ |
| __u64 coremem; /* accumulated RSS usage in MB-usec */ |
| /* Accumulated virtual memory usage in duration of a task. |
| * Same as acct_rss_mem1 above except that we keep track of VM usage. |
| */ |
| __u64 virtmem; /* accumulated VM usage in MB-usec */ |
| |
| /* High watermark of RSS and virtual memory usage in duration of |
| * a task, in KBytes. |
| */ |
| __u64 hiwater_rss; /* High-watermark of RSS usage, in KB */ |
| __u64 hiwater_vm; /* High-water VM usage, in KB */ |
| |
| /* The following four fields are I/O statistics of a task. */ |
| __u64 read_char; /* bytes read */ |
| __u64 write_char; /* bytes written */ |
| __u64 read_syscalls; /* read syscalls */ |
| __u64 write_syscalls; /* write syscalls */ |
| /* Extended accounting fields end */ |
| |
| #define TASKSTATS_HAS_IO_ACCOUNTING |
| /* Per-task storage I/O accounting starts */ |
| __u64 read_bytes; /* bytes of read I/O */ |
| __u64 write_bytes; /* bytes of write I/O */ |
| __u64 cancelled_write_bytes; /* bytes of cancelled write I/O */ |
| |
| __u64 nvcsw; /* voluntary_ctxt_switches */ |
| __u64 nivcsw; /* nonvoluntary_ctxt_switches */ |
| |
| /* time accounting for SMT machines */ |
| __u64 ac_utimescaled; /* utime scaled on frequency etc */ |
| __u64 ac_stimescaled; /* stime scaled on frequency etc */ |
| __u64 cpu_scaled_run_real_total; /* scaled cpu_run_real_total */ |
| |
| /* Delay waiting for memory reclaim */ |
| __u64 freepages_count; |
| __u64 freepages_delay_total; |
| }; |
| |
| |
| /* |
| * Commands sent from userspace |
| * Not versioned. New commands should only be inserted at the enum's end |
| * prior to __TASKSTATS_CMD_MAX |
| */ |
| |
| enum { |
| TASKSTATS_CMD_UNSPEC = 0, /* Reserved */ |
| TASKSTATS_CMD_GET, /* user->kernel request/get-response */ |
| TASKSTATS_CMD_NEW, /* kernel->user event */ |
| __TASKSTATS_CMD_MAX, |
| }; |
| |
| #define TASKSTATS_CMD_MAX (__TASKSTATS_CMD_MAX - 1) |
| |
| enum { |
| TASKSTATS_TYPE_UNSPEC = 0, /* Reserved */ |
| TASKSTATS_TYPE_PID, /* Process id */ |
| TASKSTATS_TYPE_TGID, /* Thread group id */ |
| TASKSTATS_TYPE_STATS, /* taskstats structure */ |
| TASKSTATS_TYPE_AGGR_PID, /* contains pid + stats */ |
| TASKSTATS_TYPE_AGGR_TGID, /* contains tgid + stats */ |
| TASKSTATS_TYPE_NULL, /* contains nothing */ |
| __TASKSTATS_TYPE_MAX, |
| }; |
| |
| #define TASKSTATS_TYPE_MAX (__TASKSTATS_TYPE_MAX - 1) |
| |
| enum { |
| TASKSTATS_CMD_ATTR_UNSPEC = 0, |
| TASKSTATS_CMD_ATTR_PID, |
| TASKSTATS_CMD_ATTR_TGID, |
| TASKSTATS_CMD_ATTR_REGISTER_CPUMASK, |
| TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK, |
| __TASKSTATS_CMD_ATTR_MAX, |
| }; |
| |
| #define TASKSTATS_CMD_ATTR_MAX (__TASKSTATS_CMD_ATTR_MAX - 1) |
| |
| /* NETLINK_GENERIC related info */ |
| |
| #define TASKSTATS_GENL_NAME "TASKSTATS" |
| #define TASKSTATS_GENL_VERSION 0x1 |
| |
| #endif /* _LINUX_TASKSTATS_H */ |
