On Tue, 14 Aug 2012, Russell King wrote: > > Actually, Henrik (added to CC) has been doing some latency improvements > > both for input core in general, and for HID devices as well lately. I > > still have his patchset in my to-review queue, as I have just came back > > from offline vacation, but the patch below definitely can't hurt and > > should significantly lower the time spent in handling the irq for hid > > device in common situation (i.e. noone listening for debugfs events). > > > > Could you please measure how much it helps on your system? > > Ok, it looks like it's changed the maximum USB interrupt execution > time from around 364us to 255us. > > If I also do a similar trick with the debug code in hid_input_report() > then I get down to 212us - iow, something like the patch below.
Are you testing with kernel that contains b94e3c94aae04 already? That should cover that case. -- Jiri Kosina SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
