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| author |   Mathias Nyman <mathias.nyman@linux.intel.com> | 2024-12-27 14:01:38 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-12-27 13:06:10 +0100 |
| commit | 03e3d9c2bd85cda941b3cf78e895c1498ac05c5f (patch) | |
| tree | 7fbe9939218d0efc8069dae506461505db5b30ef | |
| parent | usb: gadget: f_tcm: Refactor goto check_condition (diff) | |
| download | wireguard-linux-03e3d9c2bd85cda941b3cf78e895c1498ac05c5f.tar.xz wireguard-linux-03e3d9c2bd85cda941b3cf78e895c1498ac05c5f.zip | |
xhci: dbc: Improve performance by removing delay in transfer event polling.
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@chromium.org>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20241227120142.1035206-2-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/host/xhci-dbgcap.c | 2 |
1 files changed, 1 insertions, 1 deletions
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"); |