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DRAM Prefetch on I/O Request
NOTE: This option is available on G7 and Gen8 servers with AMD processors.
Depending on the type of I/O and expansion cards being used, the processor constantly prefetches
data from RAM to decrease latency within the I/O subsystems and expansion cards. This option
controls those processor prefetch features.
In most cases, this option should remain enabled. With certain workloads, however, disabling this
option may provide a performance benefit. Disable this option only after performing application
benchmarking to verify improved performance in a particular environment.
Options include:
• Enabled (default)
• Disabled
Advanced Options menu 135
- Abstract 1
- Contents 3
- 4 Contents 4
- Contents 5 5
- 6 Contents 6
- Contents 7 7
- 8 Contents 8
- 1 Introduction 9
- Using this guide 10
- G7, and Gen8 servers) 11
- System Options menu 12
- System Options menu 13 13
- Virtual Serial Port 14
- System Options menu 15 15
- Embedded NICs 16
- NIC Personality Options 17
- USB Options 19
- USB 2.0 Controller 21
- USB Boot Support 22
- USB Drive Key Enumeration 23
- Processor Options 25
- No-Execute Page Protection 27
- AMD V (AMD Virtualization) 29
- Intel Hyperthreading Options 30
- System Options menu 31 31
- Intel Turbo Boost Technology 33
- System Options menu 35 35
- AMD Core Performance Boost 36
- Intel VT-d 37
- AMD-Vi (IOMMU) 38
- System Options menu 39 39
- Embedded SATA Configuration 42
- Power Management Options menu 45
- HP Power Regulator 46
- Redundant Power Supply Mode 47
- Intel QPI Link Frequency 50
- Energy/Performance Bias 57
- Maximum Memory Bus Frequency 58
- Channel Interleaving 59
- Memory Interleaving 60
- Maximum PCI Express Speed 63
- Collaborative Power Control 65
- Power Capping Support 66
- DIMM Idle Power Saving Mode 68
- DIMM Voltage Preference 69
- Memory Power Savings Mode 70
- HyperTransport Frequency 71
- PCI IRQ Settings menu 73
- POST F1 Prompt 82
- Power Button 83
- Server Availability menu 85 85
- Power-On Delay 86
- Server Security menu 87
- TPM Clear 94
- BIOS Interface Mode 99
- Server Asset Text menu 100
- Administrator Info Text 101
- Service Contact Text 102
- Custom POST Message 103
- Advanced Options menu 104
- Option ROM Loading Sequence 105
- MPS Table Mode 106
- ROM Selection 107
- NMI Debug Button 108
- Virtual Install Disk 109
- PCI Bus Padding Options 110
- Memory Mapped I/O Options 111
- Address Mode 44-bit 112
- Power-On Logo 113
- F11 Boot Menu Prompt 114
- Consistent Device Naming 115
- Network Boot Retry Support 116
- Hide Option ROM Messages 117
- PCIe Slot6 Training Speed 118
- Advanced Options menu 119 119
- HP Option ROM Prompting 120
- Video Options 121
- Thermal Configuration 123
- Service Options 124
- Product ID 125
- HW Prefetcher 127
- Adjacent Sector Prefetch 128
- DCU Prefetcher 129
- DCU Streamer Prefetcher 130
- DCU IP Prefetcher 131
- Data Reuse 132
- Advanced Options menu 133 133
- DRAM Prefetch on CPU Request 134
- DRAM Prefetch on I/O Request 135
- CPU Core Hardware Prefetcher 136
- CPU Cache Stride Prefetcher 137
- Stack Engine Prediction 138
- Node Interleaving 139
- Data Direct I/O 141
- Memory Channel Mode 142
- Advanced Options menu 143 143
- Hemisphere Mode 144
- HPC Optimization Mode 145
- ACPI SLIT Preferences 146
- Advanced Options menu 147 147
- One Terabyte Memory Limit 148
- Drive Write Cache 149
- Asset Tag Protection 150
- Advanced Options menu 151 151
- Embedded SATA RAID 152
- System Default Options menu 153
- User Default Options 155
- Options include: 157
- • English (default) 157
- • Japanese 157
- RBSU main menu 158
- Embedded Serial Port A 159
- Embedded Serial Port B 160
- Optional LPT Mode Support 161
- NUMLOCK Power-On State 161
- Diskette Write Control 162
- Diskette Boot Control 162
- Advanced Memory Protection 163
- USB Control 164
- USB 2.0 EHCI Controller 164
- Power Regulator for ProLiant 165
- USB External Port Capability 166
- Ultra Low Power State 167
- PCI Devices menu 168
- Boot Controller Order menu 170
- Date and Time menu 170
- Server Availability menu 170
- ASR Status 171
- ASR Timeout 171
- Thermal Shutdown 171
- Wake-On LAN 171
- POST Speed Up 171
- Server Passwords menu 172
- Set Power-On Password 173
- Set Admin Password 173
- Trusted Platform Module 173
- TPM Functionality 174
- TPM Visibility 174
- TPM Expansion ROM Measuring 174
- Network Server Mode 175
- QuickLock 175
- BIOS Serial Console Port 176
- BIOS Serial Console Baud Rate 176
- EMS Console 178
- Set Service Contact Text 180
- Secondary IDE Channel Support 184
- BIOS Enhanced RAID 184
- Processor Hyper-Threading 185
- No-Execute Memory Protection 186
- Embedded VGA Control 187
- Utility Language menu 188
- BIOS Serial Console setup 189
- Terminal emulation options 189
- 7. Select Terminal Settings 191
- Keystroke emulation 193
- Escape sequences 194
- Inspect CLI Commands 195
- RBSU CLI Commands 196
- Command Buffering Support 198
- Additional CLI support 199
- Manual configuration flow 200
- Scripted configuration flow 200
- Using HPRCU 203
- HPRCU command-line syntax 203
- HPRCU command line arguments 203
- HPRCU return codes 203
- 6 ROM-based utilities 205
- Setup Utility 206
- Inspect Utility 206
- Diagnostics Utility 207
- CPU Test 208
- Auto-Configuration Process 209
- Boot options 211
- Operating System Installation 211
- 7 Support and other resources 212
- Typographic conventions 213
- HP Insight Online 214
- 8 Documentation feedback 215
- Acronyms and abbreviations 216
- 218 Index 218
- 220 Index 220
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