[Btrfs-devel] Bonnie++ on linux/ppc btrfs 0.13

[Miguel Figueiredo Mascarenhas Sousa Filipe]

Hi there,

I thought I'd share some simple bonnie++ runs I did on a "low end" system.
I ran bonnie++ 1.03 on a ibook/ppc, with btrfs-unstable (rev e4cd88595ed7 ) and
 ext3, on ubuntu/ppc.

This i a ibook G3 800mhz ppc750 , with 640mb of ram, and a 30GB slow ide disk.
Kernel is: 2.6.20-16-powerpc

this is the output of a hdparm -i /dev/hda
/dev/hda:

 Model=TOSHIBA MK3018GAS, FwRev=Q3.03 B, SerialNo=X2MH7901T
 Config={ Fixed }
 RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=46
 BuffType=unknown, BuffSize=0kB, MaxMultSect=128, MultSect=off
 CurCHS=16383/16/63, CurSects=16514064, LBA=no
 IORDY=no, tPIO={min:120,w/IORDY:120}
 PIO modes:  pio0 pio3 pio4
 UDMA modes: udma0 udma1 *udma2 udma3 udma4 udma5
 AdvancedPM=yes: unknown setting WriteCache=enabled
 Drive conforms to: Unspecified:  ATA/ATAPI-1,2,3,4,5

 $ cat btrfs.bonnie
Version  1.03       ------Sequential Output------ --Sequential Input- --Random-
                    -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
newton        1256M  4174  81 15443  35  7111   8  4933  89 18301  11  75.1   1
                    ------Sequential Create------ --------Random Create--------
                    -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
                 16  5583  98 +++++ +++  4536  99  5596  99 +++++ +++  4070  98

$ cat ext3.bonnie
Version  1.03       ------Sequential Output------ --Sequential Input- --Random-
                    -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
newton        1256M  5337  95 17829  14  7100   8  3498  59 17087  12  63.8   0
                    ------Sequential Create------ --------Random Create--------
                    -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
                 16 16200  83 +++++ +++ 23956  83 14767  76 +++++ +++ 18247  65

I would like to point out that metadata operations, like create and delete seem
cpu bounded, and a bit low..
Also, btrfs is allready besting ext3 on seeks/sec and input performance :D.

I also had to apply this patch for the kernel module to link and
insmod on this kernel.

diff -r e4cd88595ed7 extent_io.c
--- a/extent_io.c       Thu Feb 21 14:54:12 2008 -0500
+++ b/extent_io.c       Sun Mar 02 00:25:39 2008 +0000
@@ -2078,7 +2078,7 @@ done:
        return 0;
 }

-#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,20)

 /* Taken directly from 2.6.23 for 2.6.18 back port */
 typedef int (*writepage_t)(struct page *page, struct writeback_control *wbc,

Kind regards


-- 
Miguel Sousa Filipe