Date: Tue, 17 Dec 2002 10:15:07 -0800 (PST) From: Sam Leffler <sam@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/opencrypto crypto.c cryptodev.c cryptodev.h Message-ID: <200212171815.gBHIF7B1035544@repoman.freebsd.org>
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sam 2002/12/17 10:15:07 PST
Modified files: (Branch: RELENG_4)
sys/opencrypto crypto.c cryptodev.c cryptodev.h
Log:
Revise processing of crypto ops for better performance. Rather than context
switch to a kernel thread to dispatch each request use a software interrupt
to invoke the dispatching logic. Also, and almost as important, decouple
callbacks done when ops complete from the dispatch thread. These are done
in a kernel thread (as opposed to a swi context) so that clients of the crypto
system don't need to be concerned with blocking crypto-related interrupts.
Specific changes:
o splimp's -> splcrypto's because entry to the crypto code can come at
splsoftcrypto now
o add system-wide statistics for the crypto system
o add timing statistics for crypto ops as they pass through the system to
help in analyzing performance; these are conditionally compiled in under
CRYPTO_TIMING and enabled with a debug.crypto_timing sysctl
o purge an unused entry from the cryptop data structure
o change some wakeup's to wakeup_one since we know there's only one proc waiting
o check error return from crypto_invoke in /dev/crypto support
o bzero zalloc'd data in crypto_getreq (missed in previous MFC)
Note: these changes are not relevant to -current because swi's are implemented
with kthreads.
Sponsored by: Vernier Networks
Inspired by: Jonathan Stone <jonathan@DSG.Stanford.EDU>
Revision Changes Path
1.4.2.2 +232 -118 src/sys/opencrypto/crypto.c
1.4.2.2 +8 -12 src/sys/opencrypto/cryptodev.c
1.2.2.2 +28 -1 src/sys/opencrypto/cryptodev.h
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