Thread (14 messages) 14 messages, 5 authors, 2012-02-14

How to measure performance inside Kernel?

From: peter.senna@gmail.com (Peter Senna Tschudin)
Date: 2012-02-13 23:13:06

Hi Mulyadi,
I read your code and I think kmalloc can be streamlined here. I
recommend that kmalloc() allocate total memory needed to handle whole
q->buf[] array. something like (CMIIW):

q->buf=kmalloc(sizeof(struct vb_buffer)*q->num_buffers,GFP_KERNEL)

then access q->buf[1], q->buf[2] etc.
struct vb2_queue {
	struct vb2_buffer		*bufs[VIDEO_MAX_FRAME];
	unsigned int			num_buffers;
};

bufs is an array of pointers to struct vb2_buffer. I was not able to
use your kmalloc code. I get incompatible types errors when trying it.
Any ideas?

-- 
Peter Senna Tschudin
peter.senna at gmail.com
gpg id: 48274C36
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help