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| author | Devin Heitmueller <dheitmueller@kernellabs.com> | 2010-01-22 01:53:17 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-05-18 00:50:13 -0300 |
| commit | 33c02facb5a3123212587295cc1c241ee7e03adb (patch) | |
| tree | 4a8beb803b8210624f76be000170fe684fd70244 | |
| parent | f0dbf82bf1ff97c24af228328fb21c93fcfcb983 (diff) | |
| download | op-kernel-dev-33c02facb5a3123212587295cc1c241ee7e03adb.zip op-kernel-dev-33c02facb5a3123212587295cc1c241ee7e03adb.tar.gz | |
V4L/DVB: em28xx: adjust number of packets per URB
Increase the packets per URB count from 40 to 64. I suspect that whoever was
looking at the usbsnoop captures saw "0x40" packets and mistook it for "40".
As a result of this change, I can see a 25% reduction in the number of
interrupts generated via powertop.
This work was sponsored by EyeMagnet Limited.
Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| -rw-r--r-- | drivers/media/video/em28xx/em28xx.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/media/video/em28xx/em28xx.h b/drivers/media/video/em28xx/em28xx.h index ba6fe5d..526c065 100644 --- a/drivers/media/video/em28xx/em28xx.h +++ b/drivers/media/video/em28xx/em28xx.h @@ -140,10 +140,10 @@ #define EM28XX_NUM_BUFS 5 /* number of packets for each buffer - windows requests only 40 packets .. so we better do the same + windows requests only 64 packets .. so we better do the same this is what I found out for all alternate numbers there! */ -#define EM28XX_NUM_PACKETS 40 +#define EM28XX_NUM_PACKETS 64 #define EM28XX_INTERLACED_DEFAULT 1 |
