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Test5 performance comparison

DISCUSSION Rajagopal Ananthanarayanan 2 participants 2 messages Jul 28, 2000 Memory management

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Rajagopal Ananthanarayanan

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#0 lore raw

In short, test5 looks good, the best ever
in my experience. In detail:

All numbers on a 2P 64MB X86 box using
a dedicated scsi disk for the tests containing
an EXT2 filesystem.

------
Bonnie
------

              -------Sequential Output-------- ---Sequential Input-- --Random--
              -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---

Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU

TEST5     256  3618 99.2  11135 16.0  5981 10.8  3005 88.8 18268 17.8 185.4  2.9
TEST5     256  3652 100.0 11066 15.6  6014 10.6  2999 89.1 18276 17.4 185.5  2.8
TEST5     256  3647 99.8  11055 15.8  5924 10.3  3003 88.8 18270 18.5 183.5  3.1
TEST4     256  3630 99.5   9915 14.7  6013 11.3  2894 86.0 18502 19.1 181.4  3.1
TEST4     256  3110 85.5   9884 14.7  6098 11.1  1831 54.3 18554 17.6 183.8  3.0
TEST4     256  3301 89.7   9857 15.3  6034 10.2  2772 82.7 18570 17.6 180.8  2.5
TEST3     256  3628 99.5  10693 15.3  6084 10.7  3014 89.5 18533 17.7 182.6  3.2
TEST3     256  3648 100.2 10456 15.2  6044 11.1  3031 89.7 18511 18.6 183.6  2.5
TEST3     256  3650 99.9  10545 15.6  6046 10.8  3020 89.9 18518 19.8 181.6  2.6
TEST1     256  3434 94.8   6858 12.0  2949  6.1  3110 93.0 18713 21.3 174.9  3.3
TEST1     256  3421 95.0   6933 11.2  2628  6.0  3052 91.2 18569 22.0 176.0  2.5
TEST1     256  3474 96.5   6900 11.5  2824  6.1  3023 90.6 18103 24.4 173.5  2.9

-----------------------------------
lmdd (across blocksizes 1K to 1024K
------------------------------------

                Write           Read
               ---------        --------
TEST5           11.5  MB/s      ~19MB/s
TEST4           10    MB/s      [ Didn't run this ]
TEST3           10-11 MB/s      ~19MB/s
TEST1            6-7  MB/s      ~18.5MB/s

-------------------
DBENCH (48 clients)
-------------------
TEST5 - 11.5 - 12.4 MB/sec

TEST4 - 10.X - 11.X  MB/sec
TEST3 - 10.X - 11.X  MB/sec
TEST1 -  1.5 -  2.X  MB/sec
Signature · 8 lines
--------------------------------------------------------------------------
Rajagopal Ananthanarayanan ("ananth")
Member Technical Staff, SGI.
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#1 lore raw
Quoted 9 lines · Rajagopal Ananthanarayanan

In short, test5 looks good, the best ever
in my experience. In detail:

              -------Sequential Output-------- ---Sequential Input-- --Random--
              -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---

Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU

TEST5     256  3618 99.2  11135 16.0  5981 10.8  3005 88.8 18268 17.8 185.4  2.9
TEST4     256  3630 99.5   9915 14.7  6013 11.3  2894 86.0 18502 19.1 181.4  3.1

This difference is due to the fact that kswapd in -test5 is woken up on time (when all zones have zone->zone_wake_kswapd set), whereas the other kernels didn't contain that bugfix.

cheers,

Rik
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