mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-02 09:46:44 +07:00
5995477ab7
Put all i/o statistics in struct proc_io_accounting and use inline functions to
initialize and increment statistics, removing a lot of single variable
assignments.
This also reduces the kernel size as following (with CONFIG_TASK_XACCT=y and
CONFIG_TASK_IO_ACCOUNTING=y).
text data bss dec hex filename
11651 0 0 11651 2d83 kernel/exit.o.before
11619 0 0 11619 2d63 kernel/exit.o.after
10886 132 136 11154 2b92 kernel/fork.o.before
10758 132 136 11026 2b12 kernel/fork.o.after
3082029 807968 4818600 8708597 84e1f5 vmlinux.o.before
3081869 807968 4818600 8708437 84e155 vmlinux.o.after
Signed-off-by: Andrea Righi <righi.andrea@gmail.com>
Acked-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
/*
|
|
* proc_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
|
|
* sched.h.
|
|
*
|
|
* Blame akpm@osdl.org for all this.
|
|
*/
|
|
|
|
#ifdef CONFIG_TASK_XACCT
|
|
struct task_chr_io_accounting {
|
|
/* bytes read */
|
|
u64 rchar;
|
|
/* bytes written */
|
|
u64 wchar;
|
|
/* # of read syscalls */
|
|
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.
|
|
*/
|
|
u64 read_bytes;
|
|
|
|
/*
|
|
* The number of bytes which this task has caused, or shall cause to be
|
|
* written to disk.
|
|
*/
|
|
u64 write_bytes;
|
|
|
|
/*
|
|
* A task can cause "negative" IO too. If this task truncates some
|
|
* dirty pagecache, some IO which another task has been accounted for
|
|
* (in its write_bytes) will not be happening. We _could_ just
|
|
* subtract that from the truncating task's write_bytes, but there is
|
|
* 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;
|
|
};
|