Queue event polling work with 0 delay in case there are pending transfers
queued up. This is part 2 of a 3 part series that roughly triples dbc
performace when using adb push and pull over dbc.
Max/min push rate after patches is 210/118 MB/s, pull rate 171/133 MB/s,
tested with large files (300MB-9GB) by Łukasz Bartosik
First performance improvement patch was commit 31128e7492dc
("xhci: dbc: add dbgtty request to end of list once it completes")
Cc: Łukasz Bartosik <ukaszb@xxxxxxxxxxxx>
Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
---
drivers/usb/host/xhci-dbgcap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/host/xhci-dbgcap.c b/drivers/usb/host/xhci-dbgcap.c
index 227e513867dd..fd7895b24367 100644
--- a/drivers/usb/host/xhci-dbgcap.c
+++ b/drivers/usb/host/xhci-dbgcap.c
@@ -957,7 +957,7 @@ static void xhci_dbc_handle_events(struct work_struct *work)
/* set fast poll rate if there are pending data transfers */
if (!list_empty(&dbc->eps[BULK_OUT].list_pending) ||
!list_empty(&dbc->eps[BULK_IN].list_pending))
- poll_interval = 1;
+ poll_interval = 0;
break;
default:
dev_info(dbc->dev, "stop handling dbc events\n");
--
2.25.1
