* fadvise doesn't work well.
@ 2013-01-09 8:05 Simon Jeons
2013-01-09 8:09 ` Fengguang Wu
0 siblings, 1 reply; 5+ messages in thread
From: Simon Jeons @ 2013-01-09 8:05 UTC (permalink / raw)
To: linux-mm
Cc: Andrew Morton, hughd, riel, Johannes Weiner, mtk.manpages,
Fengguang Wu
[-- Attachment #1: Type: text/plain, Size: 16 bytes --]
In attanchment.
[-- Attachment #2: 11 --]
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root@kernel:~/Documents/mm/tools/linux-ftools# dd if=../../../images/ubuntu-11.04-desktop-i386.iso of=/tmpfs
1403484+0 records in
1403484+0 records out
718583808 bytes (719 MB) copied, 19.5054 s, 36.8 MB/s
root@kernel:~/Documents/mm/tools/linux-ftools# ./linux-fincore -s ../../../images/ubuntu-11.04-desktop-i386.iso
filename size total_pages min_cached page cached_pages cached_size cached_perc
-------- ---- ----------- --------------- ------------ ----------- -----------
../../../images/ubuntu-11.04-desktop-i386.iso 718583808 175436 0 175436 718585856 100.00
---
total cached size: 718585856
root@kernel:~/Documents/mm/tools/linux-ftools# ./linux-fadvise ../../../images/ubuntu-11.04-desktop-i386.iso DONTNEED 0,718585856
Going to fadvise ../../../images/ubuntu-11.04-desktop-i386.iso as mode DONTNEED
offset: 0
length: 718583808
Invalid mode DONTNEED
root@kernel:~/Documents/mm/tools/linux-ftools# ./linux-fincore -s ../../../images/ubuntu-11.04-desktop-i386.iso
filename size total_pages min_cached page cached_pages cached_size cached_perc
-------- ---- ----------- --------------- ------------ ----------- -----------
../../../images/ubuntu-11.04-desktop-i386.iso 718583808 175436 0 175436 718585856 100.00
---
total cached size: 718585856
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: fadvise doesn't work well.
2013-01-09 8:05 fadvise doesn't work well Simon Jeons
@ 2013-01-09 8:09 ` Fengguang Wu
2013-01-09 8:18 ` Simon Jeons
0 siblings, 1 reply; 5+ messages in thread
From: Fengguang Wu @ 2013-01-09 8:09 UTC (permalink / raw)
To: Simon Jeons
Cc: linux-mm, Andrew Morton, hughd, riel, Johannes Weiner,
mtk.manpages
Hi Simon,
Try run "sync" before doing fadvise, because fadvise won't drop
dirty/writeback/mapped pages.
Thanks,
Fengguang
On Wed, Jan 09, 2013 at 02:05:21AM -0600, Simon Jeons wrote:
> In attanchment.
> root@kernel:~/Documents/mm/tools/linux-ftools# dd if=../../../images/ubuntu-11.04-desktop-i386.iso of=/tmpfs
> 1403484+0 records in
> 1403484+0 records out
> 718583808 bytes (719 MB) copied, 19.5054 s, 36.8 MB/s
> root@kernel:~/Documents/mm/tools/linux-ftools# ./linux-fincore -s ../../../images/ubuntu-11.04-desktop-i386.iso
> filename size total_pages min_cached page cached_pages cached_size cached_perc
> -------- ---- ----------- --------------- ------------ ----------- -----------
> ../../../images/ubuntu-11.04-desktop-i386.iso 718583808 175436 0 175436 718585856 100.00
> ---
> total cached size: 718585856
> root@kernel:~/Documents/mm/tools/linux-ftools# ./linux-fadvise ../../../images/ubuntu-11.04-desktop-i386.iso DONTNEED 0,718585856
> Going to fadvise ../../../images/ubuntu-11.04-desktop-i386.iso as mode DONTNEED
> offset: 0
> length: 718583808
> Invalid mode DONTNEED
> root@kernel:~/Documents/mm/tools/linux-ftools# ./linux-fincore -s ../../../images/ubuntu-11.04-desktop-i386.iso
> filename size total_pages min_cached page cached_pages cached_size cached_perc
> -------- ---- ----------- --------------- ------------ ----------- -----------
> ../../../images/ubuntu-11.04-desktop-i386.iso 718583808 175436 0 175436 718585856 100.00
> ---
> total cached size: 718585856
>
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: fadvise doesn't work well.
2013-01-09 8:09 ` Fengguang Wu
@ 2013-01-09 8:18 ` Simon Jeons
2013-01-09 8:23 ` Fengguang Wu
2013-01-09 8:26 ` Fengguang Wu
0 siblings, 2 replies; 5+ messages in thread
From: Simon Jeons @ 2013-01-09 8:18 UTC (permalink / raw)
To: Fengguang Wu
Cc: linux-mm, Andrew Morton, hughd, riel, Johannes Weiner,
mtk.manpages
[-- Attachment #1: Type: text/plain, Size: 2479 bytes --]
On Wed, 2013-01-09 at 16:09 +0800, Fengguang Wu wrote:
> Hi Simon,
>
> Try run "sync" before doing fadvise, because fadvise won't drop
> dirty/writeback/mapped pages.
>
Hi Fengguang,
Thanks for your quick response. But the result is the same in
attachment.
> Thanks,
> Fengguang
>
> On Wed, Jan 09, 2013 at 02:05:21AM -0600, Simon Jeons wrote:
> > In attanchment.
>
> > root@kernel:~/Documents/mm/tools/linux-ftools# dd if=../../../images/ubuntu-11.04-desktop-i386.iso of=/tmpfs
The pages of ../../../images/ubuntu-11.04-desktop-i386.iso is mapped or
unmapped?
> > 1403484+0 records in
> > 1403484+0 records out
> > 718583808 bytes (719 MB) copied, 19.5054 s, 36.8 MB/s
> > root@kernel:~/Documents/mm/tools/linux-ftools# ./linux-fincore -s ../../../images/ubuntu-11.04-desktop-i386.iso
> > filename size total_pages min_cached page cached_pages cached_size cached_perc
> > -------- ---- ----------- --------------- ------------ ----------- -----------
> > ../../../images/ubuntu-11.04-desktop-i386.iso 718583808 175436 0 175436 718585856 100.00
> > ---
> > total cached size: 718585856
> > root@kernel:~/Documents/mm/tools/linux-ftools# ./linux-fadvise ../../../images/ubuntu-11.04-desktop-i386.iso DONTNEED 0,718585856
> > Going to fadvise ../../../images/ubuntu-11.04-desktop-i386.iso as mode DONTNEED
> > offset: 0
> > length: 718583808
> > Invalid mode DONTNEED
> > root@kernel:~/Documents/mm/tools/linux-ftools# ./linux-fincore -s ../../../images/ubuntu-11.04-desktop-i386.iso
> > filename size total_pages min_cached page cached_pages cached_size cached_perc
> > -------- ---- ----------- --------------- ------------ ----------- -----------
> > ../../../images/ubuntu-11.04-desktop-i386.iso 718583808 175436 0 175436 718585856 100.00
> > ---
> > total cached size: 718585856
> >
>
[-- Attachment #2: 11 --]
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root@kernel:~/Documents/mm/tools/linux-ftools# dd if=../../../images/ubuntu-11.04-desktop-i386.iso of=/tmpfs
1403484+0 records in
1403484+0 records out
718583808 bytes (719 MB) copied, 35.5144 s, 20.2 MB/s
root@hacker:~/Documents/mm/tools/linux-ftools# ./linux-fincore -s ../../../images/ubuntu-11.04-desktop-i386.iso
filename size total_pages min_cached page cached_pages cached_size cached_perc
-------- ---- ----------- --------------- ------------ ----------- -----------
../../../images/ubuntu-11.04-desktop-i386.iso 718583808 175436 0 175436 718585856 100.00
---
total cached size: 718585856
root@kernel:~/Documents/mm/tools/linux-ftools# sync
root@kernel:~/Documents/mm/tools/linux-ftools# ./linux-fincore -s ../../../images/ubuntu-11.04-desktop-i386.iso
filename size total_pages min_cached page cached_pages cached_size cached_perc
-------- ---- ----------- --------------- ------------ ----------- -----------
../../../images/ubuntu-11.04-desktop-i386.iso 718583808 175436 0 175436 718585856 100.00
---
total cached size: 718585856
root@kernel:~/Documents/mm/tools/linux-ftools# ./linux-fadvise ../../../images/ubuntu-11.04-desktop-i386.iso DONTNEED 0,718585856
Going to fadvise ../../../images/ubuntu-11.04-desktop-i386.iso as mode DONTNEED
offset: 0
length: 718583808
Invalid mode DONTNEED
root@kernel:~/Documents/mm/tools/linux-ftools# ./linux-fincore -s ../../../images/ubuntu-11.04-desktop-i386.iso
filename size total_pages min_cached page cached_pages cached_size cached_perc
-------- ---- ----------- --------------- ------------ ----------- -----------
../../../images/ubuntu-11.04-desktop-i386.iso 718583808 175436 0 175436 718585856 100.00
---
total cached size: 718585856
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: fadvise doesn't work well.
2013-01-09 8:18 ` Simon Jeons
@ 2013-01-09 8:23 ` Fengguang Wu
2013-01-09 8:26 ` Fengguang Wu
1 sibling, 0 replies; 5+ messages in thread
From: Fengguang Wu @ 2013-01-09 8:23 UTC (permalink / raw)
To: Simon Jeons
Cc: linux-mm, Andrew Morton, hughd, riel, Johannes Weiner,
mtk.manpages
On Wed, Jan 09, 2013 at 02:18:28AM -0600, Simon Jeons wrote:
> On Wed, 2013-01-09 at 16:09 +0800, Fengguang Wu wrote:
> > Hi Simon,
> >
> > Try run "sync" before doing fadvise, because fadvise won't drop
> > dirty/writeback/mapped pages.
> >
>
> Hi Fengguang,
>
> Thanks for your quick response. But the result is the same in
> attachment.
>
> > Thanks,
> > Fengguang
> >
> > On Wed, Jan 09, 2013 at 02:05:21AM -0600, Simon Jeons wrote:
> > > In attanchment.
> >
> > > root@kernel:~/Documents/mm/tools/linux-ftools# dd if=../../../images/ubuntu-11.04-desktop-i386.iso of=/tmpfs
>
> The pages of ../../../images/ubuntu-11.04-desktop-i386.iso is mapped or
> unmapped?
You may check if anyone is using (hence possibly mapping) it with
lsof | grep ubuntu-11.04-desktop-i386.iso
Thanks,
Fengguang
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^ permalink raw reply [flat|nested] 5+ messages in thread* Re: fadvise doesn't work well.
2013-01-09 8:18 ` Simon Jeons
2013-01-09 8:23 ` Fengguang Wu
@ 2013-01-09 8:26 ` Fengguang Wu
1 sibling, 0 replies; 5+ messages in thread
From: Fengguang Wu @ 2013-01-09 8:26 UTC (permalink / raw)
To: Simon Jeons
Cc: linux-mm, Andrew Morton, hughd, riel, Johannes Weiner,
mtk.manpages
> root@kernel:~/Documents/mm/tools/linux-ftools# ./linux-fadvise ../../../images/ubuntu-11.04-desktop-i386.iso DONTNEED 0,718585856
> Going to fadvise ../../../images/ubuntu-11.04-desktop-i386.iso as mode DONTNEED
> offset: 0
> length: 718583808
> Invalid mode DONTNEED
~~~~~~~~~~~~~~~~~~~~~~~
Oops, that's invalid command. Use "dontneed" rather than "DONTNEED".
fadvise is case sensitive..
Thanks,
Fengguang
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^ permalink raw reply [flat|nested] 5+ messages in thread
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2013-01-09 8:05 fadvise doesn't work well Simon Jeons
2013-01-09 8:09 ` Fengguang Wu
2013-01-09 8:18 ` Simon Jeons
2013-01-09 8:23 ` Fengguang Wu
2013-01-09 8:26 ` Fengguang Wu
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