特定のカードへのPCI Express接続の速度を決定する方法はありますか? 3枚のカードが接続されています。
2つのNvidia GTX 480(1つはx16および1つはx8)1つのNvidia GTX 460はx8で実行
Cの関数呼び出しまたはグラフィックカードのバス速度を決定できるlspci
のオプションによって、何らかの方法がありますか? CUDAプログラムにカードの1つだけを使用する場合、x16で実行されているカードを使用したいと思います。
ありがとう!
注意: lspci -vvv
ダンプ
2つのGTX 480用。バス速度に関する違いは見当たりません。
03:00.0 VGA compatible controller: nVidia Corporation Device 06c0 (rev a3)
Subsystem: eVga.com. Corp. Device 1480
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin A routed to IRQ 16
Region 0: Memory at d4000000 (32-bit, non-prefetchable) [size=32M]
Region 1: Memory at b0000000 (64-bit, prefetchable) [size=128M]
Region 3: Memory at bc000000 (64-bit, prefetchable) [size=64M]
Region 5: I/O ports at df00 [disabled] [size=128]
[virtual] Expansion ROM at b8000000 [disabled] [size=512K]
Capabilities: <access denied>
Kernel driver in use: nvidia
Kernel modules: nvidia, nvidiafb, nouveau
03:00.1 Audio device: nVidia Corporation Device 0be5 (rev a1)
Subsystem: eVga.com. Corp. Device 1480
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Interrupt: pin B routed to IRQ 5
Region 0: [virtual] Memory at d7ffc000 (32-bit, non-prefetchable) [disabled] [size=16K]
Capabilities: <access denied>
04:00.0 VGA compatible controller: nVidia Corporation Device 06c0 (rev a3)
Subsystem: eVga.com. Corp. Device 1480
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin A routed to IRQ 16
Region 0: Memory at dc000000 (32-bit, non-prefetchable) [size=32M]
Region 1: Memory at c0000000 (64-bit, prefetchable) [size=128M]
Region 3: Memory at cc000000 (64-bit, prefetchable) [size=64M]
Region 5: I/O ports at cf00 [size=128]
[virtual] Expansion ROM at c8000000 [disabled] [size=512K]
Capabilities: <access denied>
Kernel driver in use: nvidia
Kernel modules: nvidia, nvidiafb, nouveau
04:00.1 Audio device: nVidia Corporation Device 0be5 (rev a1)
Subsystem: eVga.com. Corp. Device 1480
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 64 bytes
Interrupt: pin B routed to IRQ 5
Region 0: Memory at dfffc000 (32-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
そして、私が見る唯一の違いは、特にメモリマッピングに関連しています:
myComputer:~> diff card1 card2
3c3
< Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
---
> Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
7,11c7,11
< Region 0: Memory at d4000000 (32-bit, non-prefetchable) [size=32M]
< Region 1: Memory at b0000000 (64-bit, prefetchable) [size=128M]
< Region 3: Memory at bc000000 (64-bit, prefetchable) [size=64M]
< Region 5: I/O ports at df00 [disabled] [size=128]
< [virtual] Expansion ROM at b8000000 [disabled] [size=512K]
---
> Region 0: Memory at dc000000 (32-bit, non-prefetchable) [size=32M]
> Region 1: Memory at c0000000 (64-bit, prefetchable) [size=128M]
> Region 3: Memory at cc000000 (64-bit, prefetchable) [size=64M]
> Region 5: I/O ports at cf00 [size=128]
> [virtual] Expansion ROM at c8000000 [disabled] [size=512K]
18c18
< Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
---
> Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
19a20
> Latency: 0, Cache Line Size: 64 bytes
21c22
< Region 0: [virtual] Memory at d7ffc000 (32-bit, non-prefetchable) [disabled] [size=16K]
---
> Region 0: Memory at dfffc000 (32-bit, non-prefetchable) [size=16K]
私はこれを試しました:cat /var/log/Xorg.0.log | grep "NVIDIA"
カードと、それらがどのPCI Expressスロットにあるか、そのスロットの幅が表示されます。例えば:
20.502] (II) NVIDIA(0): NVIDIA GPU GeForce 9500 GT (G96) at PCI:1:0:0 (GPU-0)
[ 20.502] (--) NVIDIA(0): Memory: 1048576 kBytes
[ 20.502] (--) NVIDIA(0): VideoBIOS: 62.94.1f.00.8a
[ 20.502] (II) NVIDIA(0): Detected PCI Express Link width: 16X
[ 20.502] (--) NVIDIA(0): Interlaced video modes are supported on this GPU
[ 20.502] (--) NVIDIA(0): Connected display device(s) on GeForce 9500 GT at PCI:1:0:0
[ 20.502] (--) NVIDIA(0): Samsung SyncMaster (CRT-1)
[ 20.502] (--) NVIDIA(0): Samsung SyncMaster (CRT-1): 400.0 MHz maximum pixel clock
これは非常に古い質問ですが、これを適切に行う方法は実行されています
Sudo lspci -vv
各pci-eデバイスについて、LnkStaがリストされます。これは、速度を_ GT/s、幅x1として示します。また、リンク容量であるLnkCapもリストします。
2.5 GT/s = PCI-e gen 1、5 GT/s = PCI-e gen 2、8 GT/s = PCI-e gen 3、幅はレーン数です。