[PATCH] per-task-delay-accounting: /proc export of aggregated block I/O delays

Export I/O delays seen by a task through /proc/<tgid>/stats for use in top
etc.

Note that delays for I/O done for swapping in pages (swapin I/O) is clubbed
together with all other I/O here (this is not the case in the netlink
interface where the swapin I/O is kept distinct)

[[email protected]: printk warning fix]
Signed-off-by: Shailabh Nagar <[email protected]>
Signed-off-by: Balbir Singh <[email protected]>
Cc: Jes Sorensen <[email protected]>
Cc: Peter Chubb <[email protected]>
Cc: Erich Focht <[email protected]>
Cc: Levent Serinol <[email protected]>
Cc: Jay Lan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Shailabh Nagar 2006-07-14 00:24:43 -07:00 • committed by Linus Torvalds
commit 2589045466
3 changed files with 26 additions and 2 deletions

View file

@ -74,6 +74,7 @@
#include <linux/times.h>
#include <linux/cpuset.h>
#include <linux/rcupdate.h>
#include <linux/delayacct.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
@ -411,7 +412,7 @@ static int do_task_stat(struct task_struct *task, char * buffer, int whole)
res = sprintf(buffer,"%d (%s) %c %d %d %d %d %d %lu %lu \
%lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \
%lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %lu\n",
%lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %lu %llu\n",
task->pid,
tcomm,
state,
@ -455,7 +456,8 @@ static int do_task_stat(struct task_struct *task, char * buffer, int whole)
task->exit_signal,
task_cpu(task),
task->rt_priority,
task->policy);
task->policy,
(unsigned long long)delayacct_blkio_ticks(task));
if(mm)
mmput(mm);
return res;