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參數(shù)資料
| 型號(hào)： | LSI7202CP |
| 英文描述： | LSI7202CP CompactPCI Dual Channel 2 Gbit/s Fibre Channel host adapter user＇s guide v1.0 2/02 |
| 中文描述： | LSI7202CP CompactPCI的雙通道的2 Gb / s光纖通道主機(jī)適配器，用戶手冊(cè)1.0 2月2日 |
| 文件頁數(shù)： | 29/58頁 |
| 文件大小： | 680K |
| 代理商： | LSI7202CP |
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BIOS Features
3-11
Copyright 2001, 2002 by LSI Logic Corporation. All rights reserved.
WWN 2100002037105212 Port ID 1
Target 3
Unit 0
WWN 2100002037103da8 Port ID 26
Disk
SEAGATE ST39173FC
6258
Target 4
Unit 0
WWN 210000203710324a Port ID 73
Disk
SEAGATE ST39173FC
6258
3.1.5.5 Interrupt Coalescing
Interrupt coalescing allows the firmware on the Fusion-MPT device to
group I/Os together to minimize the overhead to the host system. This
feature can result in significant performance benefits when I/Os are
rapidly coming into the adapter, as is the case while performing small
sequential reads from a disk.
LSI Logic has performed significant testing under multiple I/O conditions,
and has determined that the interrupt coalescence values that are
beneficial over a wide range of I/O conditions are a depth of 4, with a
timeout of 160 microseconds. This means that the host is interrupted
only once for four I/Os processed by the chip, unless 160 microseconds
has passed since the host was last interrupted.
Although LSI Logic has determined that these settings are optimal for a
wide variety of situations, your own I/O load may benefit from a deeper
queue or a longer timeout. LSI Logic provides a mechanism to modify
these values and write them to the nonvolatile EEPROM on the adapter.
Select the port or adapter shown (use the port name your system assigns):
ok select
/pci@8,700000/IntraServer,fc@1
ok show-interrupt-coalescing
Interrupt coalescing timeout is a0 (160 decimal) microseconds
Interrupt coalescing depth is 4 (4 decimal)
ok set-interrupt-coalescing
<- command with no arguments prints help
usage is <timeout><depth> set-interrupt-coalescing
ok 100 8 set-interrupt-coalescing
Interrupt coalescing timeout selected is 100 (256 decimal) microseconds
Interrupt coalescing depth selected is 8 (8 decimal)
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