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| author | Mathias Nyman <mathias.nyman@linux.intel.com> | 2025-10-27 12:29:17 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-11-02 22:14:41 +0900 |
| commit | dae8555062cf0c6fcd01ee3ba71c30da08f7e5b3 (patch) | |
| tree | ecba85bfa1a3d064c74acb0ffe8a9dc6e14047aa | |
| parent | 6f126ef0117c98a2e07a0c3e0b814de5e3fbf4e4 (diff) | |
| download | linux-dae8555062cf0c6fcd01ee3ba71c30da08f7e5b3.tar.gz linux-dae8555062cf0c6fcd01ee3ba71c30da08f7e5b3.tar.bz2 linux-dae8555062cf0c6fcd01ee3ba71c30da08f7e5b3.zip | |
xhci: dbc: Improve performance by removing delay in transfer event polling.
[ Upstream commit 03e3d9c2bd85cda941b3cf78e895c1498ac05c5f ]
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>
Stable-dep-of: f3d12ec847b9 ("xhci: dbc: fix bogus 1024 byte prefix if ttyDBC read races with stall event")
Signed-off-by: Sasha Levin <sashal@kernel.org>
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 51bf345610ce..00555ffa623b 100644 --- a/drivers/usb/host/xhci-dbgcap.c +++ b/drivers/usb/host/xhci-dbgcap.c @@ -987,7 +987,7 @@ 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"); |