diff options
| author | Peter Chen <peter.chen@freescale.com> | 2014-11-04 20:46:15 +0800 |
|---|---|---|
| committer | Peter Chen <peter.chen@freescale.com> | 2014-11-11 13:16:36 +0800 |
| commit | b2289a78958859cff37508e4db0314463f33c2e0 (patch) | |
| tree | 9419b2dafdeb65675eea66bb3ea77d84eb3957de /drivers | |
| parent | 0de55c617de1170fb4098b7aacd6038ebc3134f1 (diff) | |
MLK-9785-1 usb: host: ehci-hcd: enable park mode
Enable park mode will improve the performance a lot at USB ethernet use
case, but a little at USB mass storage use case, and it is not harm from
the tests. Below the performance comparison at imx6sl:
USB Ethernet (Mbps)
Default Enable Park
TX 192 262
RX 262 290
USB Mass Storage (MB/s)
Read 21.8 22.9
Write 19.5 22.8
This patch is used for freescale internal.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/host/ehci-hcd.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index 66e80292f2df..733db92db98a 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -94,7 +94,7 @@ module_param (log2_irq_thresh, int, S_IRUGO); MODULE_PARM_DESC (log2_irq_thresh, "log2 IRQ latency, 1-64 microframes"); /* initial park setting: slower than hw default */ -static unsigned park = 0; +static unsigned park = 3; module_param (park, uint, S_IRUGO); MODULE_PARM_DESC (park, "park setting; 1-3 back-to-back async packets"); |