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task IO accounting: move all IO statistics in struct task_io_accounting 

Simplify the code of include/linux/task_io_accounting.h.

It is also more reasonable to have all the task i/o-related statistics in a
single struct (task_io_accounting).

Signed-off-by: Andrea Righi <righi.andrea@gmail.com>
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrea Righi 2008-07-28 00:48:12 +02:00 committed by Linus Torvalds
parent 837b41b5de
commit 940389b8af
5 changed files with 44 additions and 57 deletions
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10
fs/proc/base.c
View File

@ -2403,7 +2403,7 @@ static int proc_base_fill_cache(struct file *filp, void *dirent,
#ifdef CONFIG_TASK_IO_ACCOUNTING
static int do_io_accounting(struct task_struct *task, char *buffer, int whole)
{
struct proc_io_accounting acct = task->ioac;
struct task_io_accounting acct = task->ioac;
unsigned long flags;
if (whole && lock_task_sighand(task, &flags)) {
@ -2423,10 +2423,10 @@ static int do_io_accounting(struct task_struct *task, char *buffer, int whole)
"read_bytes: %llu\n"
"write_bytes: %llu\n"
"cancelled_write_bytes: %llu\n",
acct.chr.rchar, acct.chr.wchar,
acct.chr.syscr, acct.chr.syscw,
acct.blk.read_bytes, acct.blk.write_bytes,
acct.blk.cancelled_write_bytes);
acct.rchar, acct.wchar,
acct.syscr, acct.syscw,
acct.read_bytes, acct.write_bytes,
acct.cancelled_write_bytes);
}
static int proc_tid_io_accounting(struct task_struct *task, char *buffer)

12
include/linux/sched.h
View File

@ -505,7 +505,7 @@ struct signal_struct {
unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw;
unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt;
unsigned long inblock, oublock, cinblock, coublock;
struct proc_io_accounting ioac;
struct task_io_accounting ioac;
/*
* Cumulative ns of scheduled CPU time for dead threads in the
@ -1253,7 +1253,7 @@ struct task_struct {
unsigned long ptrace_message;
siginfo_t *last_siginfo; /* For ptrace use. */
struct proc_io_accounting ioac;
struct task_io_accounting ioac;
#if defined(CONFIG_TASK_XACCT)
u64 acct_rss_mem1; /* accumulated rss usage */
u64 acct_vm_mem1; /* accumulated virtual memory usage */
@ -2183,22 +2183,22 @@ extern long sched_group_rt_period(struct task_group *tg);
#ifdef CONFIG_TASK_XACCT
static inline void add_rchar(struct task_struct *tsk, ssize_t amt)
{
tsk->ioac.chr.rchar += amt;
tsk->ioac.rchar += amt;
}
static inline void add_wchar(struct task_struct *tsk, ssize_t amt)
{
tsk->ioac.chr.wchar += amt;
tsk->ioac.wchar += amt;
}
static inline void inc_syscr(struct task_struct *tsk)
{
tsk->ioac.chr.syscr++;
tsk->ioac.syscr++;
}
static inline void inc_syscw(struct task_struct *tsk)
{
tsk->ioac.chr.syscw++;
tsk->ioac.syscw++;
}
#else
static inline void add_rchar(struct task_struct *tsk, ssize_t amt)

17
include/linux/task_io_accounting.h
View File

@ -1,5 +1,5 @@
/*
* proc_io_accounting: a structure which is used for recording a single task's
* task_io_accounting: a structure which is used for recording a single task's
* IO statistics.
*
* Don't include this header file directly - it is designed to be dragged in via
@ -8,8 +8,8 @@
* Blame akpm@osdl.org for all this.
*/
struct task_io_accounting {
#ifdef CONFIG_TASK_XACCT
struct task_chr_io_accounting {
/* bytes read */
u64 rchar;
/* bytes written */
@ -18,14 +18,9 @@ struct task_chr_io_accounting {
u64 syscr;
/* # of write syscalls */
u64 syscw;
};
#else /* CONFIG_TASK_XACCT */
struct task_chr_io_accounting {
};
#endif /* CONFIG_TASK_XACCT */
#ifdef CONFIG_TASK_IO_ACCOUNTING
struct task_io_accounting {
/*
* The number of bytes which this task has caused to be read from
* storage.
@ -46,13 +41,5 @@ struct task_io_accounting {
* information loss in doing that.
*/
u64 cancelled_write_bytes;
};
#else /* CONFIG_TASK_IO_ACCOUNTING */
struct task_io_accounting {
};
#endif /* CONFIG_TASK_IO_ACCOUNTING */
struct proc_io_accounting {
struct task_chr_io_accounting chr;
struct task_io_accounting blk;
};

48
include/linux/task_io_accounting_ops.h
View File

@ -9,7 +9,7 @@
#ifdef CONFIG_TASK_IO_ACCOUNTING
static inline void task_io_account_read(size_t bytes)
{
current->ioac.blk.read_bytes += bytes;
current->ioac.read_bytes += bytes;
}
/*
@ -18,12 +18,12 @@ static inline void task_io_account_read(size_t bytes)
*/
static inline unsigned long task_io_get_inblock(const struct task_struct *p)
{
return p->ioac.blk.read_bytes >> 9;
return p->ioac.read_bytes >> 9;
}
static inline void task_io_account_write(size_t bytes)
{
current->ioac.blk.write_bytes += bytes;
current->ioac.write_bytes += bytes;
}
/*
@ -32,25 +32,25 @@ static inline void task_io_account_write(size_t bytes)
*/
static inline unsigned long task_io_get_oublock(const struct task_struct *p)
{
return p->ioac.blk.write_bytes >> 9;
return p->ioac.write_bytes >> 9;
}
static inline void task_io_account_cancelled_write(size_t bytes)
{
current->ioac.blk.cancelled_write_bytes += bytes;
current->ioac.cancelled_write_bytes += bytes;
}
static inline void task_io_accounting_init(struct proc_io_accounting *ioac)
static inline void task_io_accounting_init(struct task_io_accounting *ioac)
{
memset(ioac, 0, sizeof(*ioac));
}
static inline void task_blk_io_accounting_add(struct proc_io_accounting *dst,
struct proc_io_accounting *src)
static inline void task_blk_io_accounting_add(struct task_io_accounting *dst,
struct task_io_accounting *src)
{
dst->blk.read_bytes += src->blk.read_bytes;
dst->blk.write_bytes += src->blk.write_bytes;
dst->blk.cancelled_write_bytes += src->blk.cancelled_write_bytes;
dst->read_bytes += src->read_bytes;
dst->write_bytes += src->write_bytes;
dst->cancelled_write_bytes += src->cancelled_write_bytes;
}
#else
@ -77,35 +77,35 @@ static inline void task_io_account_cancelled_write(size_t bytes)
{
}
static inline void task_io_accounting_init(struct proc_io_accounting *ioac)
static inline void task_io_accounting_init(struct task_io_accounting *ioac)
{
}
static inline void task_blk_io_accounting_add(struct proc_io_accounting *dst,
struct proc_io_accounting *src)
static inline void task_blk_io_accounting_add(struct task_io_accounting *dst,
struct task_io_accounting *src)
{
}
#endif /* CONFIG_TASK_IO_ACCOUNTING */
#ifdef CONFIG_TASK_XACCT
static inline void task_chr_io_accounting_add(struct proc_io_accounting *dst,
struct proc_io_accounting *src)
static inline void task_chr_io_accounting_add(struct task_io_accounting *dst,
struct task_io_accounting *src)
{
dst->chr.rchar += src->chr.rchar;
dst->chr.wchar += src->chr.wchar;
dst->chr.syscr += src->chr.syscr;
dst->chr.syscw += src->chr.syscw;
dst->rchar += src->rchar;
dst->wchar += src->wchar;
dst->syscr += src->syscr;
dst->syscw += src->syscw;
}
#else
static inline void task_chr_io_accounting_add(struct proc_io_accounting *dst,
struct proc_io_accounting *src)
static inline void task_chr_io_accounting_add(struct task_io_accounting *dst,
struct task_io_accounting *src)
{
}
#endif /* CONFIG_TASK_XACCT */
static inline void task_io_accounting_add(struct proc_io_accounting *dst,
struct proc_io_accounting *src)
static inline void task_io_accounting_add(struct task_io_accounting *dst,
struct task_io_accounting *src)
{
task_chr_io_accounting_add(dst, src);
task_blk_io_accounting_add(dst, src);

14
kernel/tsacct.c
View File

@ -94,14 +94,14 @@ void xacct_add_tsk(struct taskstats *stats, struct task_struct *p)
stats->hiwater_vm = mm->hiwater_vm * PAGE_SIZE / KB;
mmput(mm);
}
stats->read_char = p->ioac.chr.rchar;
stats->write_char = p->ioac.chr.wchar;
stats->read_syscalls = p->ioac.chr.syscr;
stats->write_syscalls = p->ioac.chr.syscw;
stats->read_char = p->ioac.rchar;
stats->write_char = p->ioac.wchar;
stats->read_syscalls = p->ioac.syscr;
stats->write_syscalls = p->ioac.syscw;
#ifdef CONFIG_TASK_IO_ACCOUNTING
stats->read_bytes = p->ioac.blk.read_bytes;
stats->write_bytes = p->ioac.blk.write_bytes;
stats->cancelled_write_bytes = p->ioac.blk.cancelled_write_bytes;
stats->read_bytes = p->ioac.read_bytes;
stats->write_bytes = p->ioac.write_bytes;
stats->cancelled_write_bytes = p->ioac.cancelled_write_bytes;
#else
stats->read_bytes = 0;
stats->write_bytes = 0;