Acer AT350 F1 User Manual - Page 98

Direct I/O VT-d by reporting the I/O, between the PCI Express L0 and L1 Links.

Get Acer AT350 F1 PDF manuals and user guides View all Acer AT350 F1 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 98 highlights

86 4 System BIOS Parameter DCA Prefetch Delay Intel VT-d Active State PowerManagement IOH PCI-E Max Payload Size Description A DCA Prefetch is used with TOE components to prefetch data in order to shorten execution cycles and maximize data processing effi ciency. A TOE device is a specialized, dedicated processor that is installed on an add-on card or a network card to handle some or all packet processing of this add-on card. Prefetching too frequently can saturate the cache directory and delay necessary cache accesses. This feature reduces or increases the frequency the system prefetches data. Select Enabled to enable Intel Virtualization Technology support for Direct I/O VT-d by reporting the I/O device assignments to the VMM (Virtual Working Memory) through the DMAR ACPI Tables. This feature offers fullyprotected I/O resource sharing across Intel platforms, providing greater reliability, security and availability in networking and data-sharing. Select Enabled to use the power management for signal transactions between the PCI Express L0 and L1 Links. Select Enabled to configure PCI-Exp. L0 and L1 Link power states. Some add-on cards perform faster with the coalesce feature, which limits the payload size to 128B; while others, with a payload size of 256B which inhibits the coalesce feature. Please refer to your add-on card user guide for the desired setting. Options 8, 6, 32, 40, 48, 56 64, 72, 80 88, 96,104 112, 120 Enabled Disabled Enabled Disabled 256B 128B

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
4 System BIOS
86
DCA Prefetch
Delay
A DCA Prefetch is used with TOE
components to prefetch data in order to
shorten execution cycles and maximize
data processing effi ciency. A TOE device
is a specialized, dedicated processor that
is installed on an add-on card or a
network card to handle some or all
packet processing of this add-on card.
Prefetching too frequently can saturate
the cache directory and delay necessary
cache accesses. This feature reduces or
increases the frequency the system
prefetches data.
8, 6,
32
,
40, 48, 56
64, 72, 80
88, 96,104
112, 120
Intel VT-d
Select Enabled to enable Intel
Virtualization Technology support for
Direct I/O VT-d by reporting the I/O
device assignments to the VMM (Virtual
Working Memory) through the DMAR
ACPI Tables. This feature offers fully-
protected I/O resource sharing across
Intel platforms, providing greater
reliability, security and availability in
networking and data-sharing.
Enabled
Disabled
Active State
Power-
Management
Select Enabled to use the power
management for signal transactions
between the PCI Express L0 and L1 Links.
Select Enabled to configure PCI-Exp. L0
and L1 Link power states.
Enabled
Disabled
IOH PCI-E Max
Payload Size
Some add-on cards perform faster with
the coalesce feature, which limits the
payload size to 128B; while others, with
a payload size of 256B which inhibits the
coalesce feature. Please refer to your
add-on card user guide for the desired
setting.
256B
128B
Parameter
Description
Options