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| author | attilio <attilio@FreeBSD.org> | 2012-01-28 14:00:21 +0000 |
|---|---|---|
| committer | attilio <attilio@FreeBSD.org> | 2012-01-28 14:00:21 +0000 |
| commit | 1521eb447956638ea699e9468527cdcbd2b28659 (patch) | |
| tree | 51e3a468764edd7cbdf62d40b3ad43948e5ccd09 /sys/dev | |
| parent | a1d2d789bd56b6e4fbadcea3ce4cab8cd7fed168 (diff) | |
| download | FreeBSD-src-1521eb447956638ea699e9468527cdcbd2b28659.zip FreeBSD-src-1521eb447956638ea699e9468527cdcbd2b28659.tar.gz | |
Avoid to check the same cache line/variable from all the locking
primitives by breaking stop_scheduler into a per-thread variable.
Also, store the new td_stopsched very close to td_*locks members as
they will be accessed mostly in the same codepaths as td_stopsched and
this results in avoiding a further cache-line pollution, possibly.
STOP_SCHEDULER() was pondered to use a new 'thread' argument, in order to
take advantage of already cached curthread, but in the end there should
not really be a performance benefit, while introducing a KPI breakage.
In collabouration with: flo
Reviewed by: avg
MFC after: 3 months (or never)
X-MFC: r228424
Diffstat (limited to 'sys/dev')
| -rw-r--r-- | sys/dev/usb/usb_transfer.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sys/dev/usb/usb_transfer.c b/sys/dev/usb/usb_transfer.c index 4a5cfbd..e948299 100644 --- a/sys/dev/usb/usb_transfer.c +++ b/sys/dev/usb/usb_transfer.c @@ -42,6 +42,7 @@ #include <sys/callout.h> #include <sys/malloc.h> #include <sys/priv.h> +#include <sys/proc.h> #include <dev/usb/usb.h> #include <dev/usb/usbdi.h> |
