performance problem of the vertex buffer

I have a vertex buffer of about 4000 vertices and also a index buffer of
8000 indices. The problem: when I render all these vertices I got a very
poor performance, 1 or 2 frame per sec. But the cpu usage is only 4%. I
don't know why.

The vertex buffer and index buffer were created with D3DPOOL_MANAGED. I
tried D3DPOOL_SYSTEMMEM, but no improvement.

thanks.

You should post some code, that would help ...

"newbie" < XXXX@XXXXX.COM > a rit dans le message de

You should post some code and your config.
That would help...

"newbie" < XXXX@XXXXX.COM > a rit dans le message de

The large vertex buffer was generated once and rendered 
multiple times. The following is the rendering code.

In face, I render the large vertex buffer I mentions to a 
texture. So the following code is before the BeginScene
()/EndScene() pair. If I delete the line of 
DrawIndexedPrimitives() in the following code, the frame 
rate will be normal, so I think the bottle-neck is 
between the followings lines.

m_pRefVB and m_pRefIB is the large vertex buffer and 
index buffer I mentioned.
m_renderprocess is variable, which encapsulates the 
routine of rendering to any surface.(I do not use 
ID3DXRenderToSurface, because I find it can use 
multisample type).

The vertex buffer has the D3DFVF_XYZRHW set, with which I 
want to bypass the vertex processing and pass my data 
directly to the pixel shader.

Thanks a lot!
/////////////////////////////////////////////////////////
D3DVERTEXBUFFER_DESC desc;
	m_pRefVB->GetDesc(&desc);
	UINT numVertex=desc.Size/sizeof(TMeshFVF);

	D3DINDEXBUFFER_DESC indexdesc;
	m_pRefIB->GetDesc(&indexdesc);
	UINT numIndices=indexdesc.Size/2;

	IDirect3DSurface9* pSurface;
	m_pShadowTexture->GetSurfaceLevel(0, &pSurface);
	D3DVIEWPORT9 vp;
	vp.Width=(DWORD)((m_rtWnd.right-
m_rtWnd.left)/2.0f);
	vp.Height=(DWORD)((m_rtWnd.bottom-
m_rtWnd.top)/2.0f);
	vp.MinZ=0.0f;
	vp.MaxZ=1.0f;
	vp.X=vp.Y=0;
	m_renderprocess.EnableMultiSample
(FALSE,D3DMULTISAMPLE_NONE,0);
	m_renderprocess.BeginRender(pSurface, vp);
	m_pD3DDev9->Clear(0, NULL, 
D3DCLEAR_TARGET|D3DCLEAR_ZBUFFER, D3DCOLOR_XRGB
(255,255,255), 1.0f, 0);

	m_pEffect->SetTechnique("ObjApproximate");
	m_pEffect->SetFloatArray("vLightPos", 
&m_sceneInfo.lightx, 3);
	m_pEffect->SetFloat("sLightRange", 
m_sceneInfo.lightrange);

	UINT numPass;
	m_pEffect->Begin(&numPass, 0);
	m_pEffect->Pass(4);
	m_pD3DDev9->SetFVF(SHADOWMAPFVF);
	m_pD3DDev9->SetStreamSource(0, m_pRefVB, 0, sizeof
(TMeshFVF));
	m_pD3DDev9->SetIndices(m_pRefIB);
	HRESULT hr=m_pD3DDev9->DrawIndexedPrimitive
(D3DPT_TRIANGLELIST, 0,  0, numVertex, 0, numIndices/3);
	m_pEffect->End();

	m_renderprocess.EndRender();
	pSurface->Release();

/////////////////////////////////////////////////////////

what does the nvidia sample BenMark do on this machine?