Hi everyone,
It's me again. It looks like I spoke to soon with a pointing finger at XFS
in my last post. It's probably not uptime or activity that bring down my
performance, but lm_sensors.
I am using an ASUS CUV4X-E motherboard, that supposedly has a variant of
the w83781d sensor (according to the lm_sensors website it's probably an
ASUS AS99127F or some such variant which is misdetected as the w83781d).
Unfortunately ASUS refuses to release the datasheet to the lm_sensors
developers, so they've had to hack away the conversion factors for this
sensor. It's not working too well on my machine and upon loading the
module the thing goes on alarm because it (falsely) detects that the CPU
is running at 75C (it's actually running at 45C as the BIOS reports which
I presume is accurate).
Among the many things I disabled before I did a clean boot to give my
results detailed in (II), were the autoloading of the lm_sensor modules. I
tried and loading them and right after that I got the following as the
result of an 'hdparm -tT /dev/sda':
---[ result ]---
/dev/sda:
Timing buffer-cache reads: 128 MB in 3.40 seconds = 37.65 MB/sec
Timing buffered disk reads: 64 MB in 3.36 seconds = 19.05 MB/sec
Hmm.. suspicious results: probably not enough free memory for a proper test.
/dev/sda:
Timing buffer-cache reads: 128 MB in 3.40 seconds = 37.65 MB/sec
Timing buffered disk reads: 64 MB in 3.31 seconds = 19.34 MB/sec
Hmm.. suspicious results: probably not enough free memory for a proper test.
---[ end of results ]---
Gotcha!
I still promised slabinfo and meminfo results (although I don't think
they're relevant), so here they are. I don't understand these two
pseudo-files, so if someone sees an actual discrepancy maybe he/she can
point it out. I hope everyone else will pardon the bandwidth used up in my
posting these:
---[ /proc/slabinfo ]---
slabinfo - version: 1.1
kmem_cache 69 78 100 2 2 1
ip_conntrack 1 22 352 1 2 1
tcp_tw_bucket 0 0 96 0 0 1
tcp_bind_bucket 13 113 32 1 1 1
tcp_open_request 0 59 64 0 1 1
inet_peer_cache 0 0 64 0 0 1
ip_fib_hash 9 113 32 1 1 1
ip_dst_cache 17 24 160 1 1 1
arp_cache 2 30 128 1 1 1
xfs_chashlist 151 202 16 1 1 1
xfs_ili 23 28 136 1 1 1
xfs_ifork 0 0 56 0 0 1
xfs_efi_item 0 15 260 0 1 1
xfs_efd_item 0 15 260 0 1 1
xfs_buf_item 3 26 148 1 1 1
xfs_dabuf 0 202 16 0 1 1
xfs_da_state 0 0 340 0 0 1
xfs_trans 0 24 320 0 2 1
xfs_inode 698 704 468 88 88 1
xfs_btree_cur 0 28 140 0 1 1
xfs_bmap_free_item 0 202 16 0 1 1
page_buf_t 21 120 192 4 6 1
page_buf_reg_t 4 40 96 1 1 1
avl_object_t 4 113 32 1 1 1
avl_entry_t 5 113 32 1 1 1
blkdev_requests 3072 4120 96 77 103 1
dnotify cache 0 0 20 0 0 1
file lock cache 17 42 92 1 1 1
fasync cache 0 0 16 0 0 1
uid_cache 6 113 32 1 1 1
skbuff_head_cache 59 72 160 3 3 1
sock 45 54 832 5 6 2
inode_cache 5943 5944 480 743 743 1
bdev_cache 34 59 64 1 1 1
sigqueue 0 29 132 0 1 1
dentry_cache 6150 6180 128 205 206 1
filp 558 560 96 14 14 1
names_cache 0 3 4096 0 3 1
buffer_head 72858 72920 96 1822 1823 1
mm_struct 66 90 128 3 3 1
vm_area_struct 1859 1947 64 32 33 1
fs_cache 65 118 64 2 2 1
files_cache 65 72 416 8 8 1
signal_act 69 72 1312 24 24 1
size-131072(DMA) 0 0 131072 0 0 32
size-131072 17 18 131072 17 18 32
size-65536(DMA) 0 0 65536 0 0 16
size-65536 9 9 65536 9 9 16
size-32768(DMA) 0 0 32768 0 0 8
size-32768 0 1 32768 0 1 8
size-16384(DMA) 2 2 16384 2 2 4
size-16384 2 3 16384 2 3 4
size-8192(DMA) 0 0 8192 0 0 2
size-8192 2 2 8192 2 2 2
size-4096(DMA) 0 0 4096 0 0 1
size-4096 106 107 4096 106 107 1
size-2048(DMA) 0 0 2048 0 0 1
size-2048 39 42 2048 20 21 1
size-1024(DMA) 0 0 1024 0 0 1
size-1024 35 40 1024 9 10 1
size-512(DMA) 0 0 512 0 0 1
size-512 149 152 512 19 19 1
size-256(DMA) 0 0 256 0 0 1
size-256 31 45 256 3 3 1
size-128(DMA) 0 0 128 0 0 1
size-128 1634 1650 128 55 55 1
size-64(DMA) 0 0 64 0 0 1
size-64 212 708 64 4 12 1
size-32(DMA) 0 0 32 0 0 1
size-32 951 1017 32 9 9 1
---[ end of /proc/slabinfo ]---
---[ /proc/meminfo ]---
total: used: free: shared: buffers: cached:
Mem: 525074432 145969152 379105280 0 77955072 19320832
Swap: 1019891712 0 1019891712
MemTotal: 512768 kB
MemFree: 370220 kB
MemShared: 0 kB
Buffers: 76128 kB
Cached: 18868 kB
Active: 6244 kB
Inact_dirty: 88752 kB
Inact_clean: 0 kB
Inact_target: 0 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 512768 kB
LowFree: 370220 kB
SwapTotal: 995988 kB
SwapFree: 995988 kB
---[ end of /proc/meminfo ]---
--> Jijo
--
Linux, MS-DOS, and Windows NT ...
... also known as the Good, the Bad, and the Ugly
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