Date: Fri, 2 Apr 2004 15:36:49 -0800 (PST) From: Ruslan Ermilov <ru@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/pci if_ste.c if_stereg.h Message-ID: <200404022336.i32Nan3A042861@repoman.freebsd.org>
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ru 2004/04/02 15:36:49 PST
FreeBSD src repository
Modified files:
sys/pci if_ste.c if_stereg.h
Log:
Performance tuning.
Moved the RX ring resyncing code to ste_rxeoc(), and only run it
if we were asked to POLL_AND_CHECK_STATUS, under DEVICE_POLLING.
(This significantly reduces the CPU load.)
Improved the RX ring resyncing code by re-checking if the head
is still empty before doing resyncing. This mostly affects the
DEVICE_POLLING mode, where we run this code periodically. We
could start checking with an empty head (well, an empty ring
even), and after doing a few iterations, the chip might write
a few entries, including the head, and we would bogusly consider
this case as requiring resyncing. On a test box, this reduced
the number of resyncs done by a factor of 10.
In ste_txeof(sc), only reset the watchdog timer to zero when
the TX list is completely empty.
Converted ste_tx_prev_idx to a pointer -- faster.
Removed some bitrot.
Revision Changes Path
1.68 +44 -38 src/sys/pci/if_ste.c
1.14 +1 -3 src/sys/pci/if_stereg.h
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