[dpdk-dev] [PATCH v3 0/3] add support for HTM lock elision for x86
Roman Dementiev
roman.dementiev at intel.com
Fri Jun 19 13:08:20 CEST 2015
This series of patches adds methods that use hardware memory transactions (HTM)
on fast-path for DPDK locks (a.k.a. lock elision). Here the methods are
implemented for x86 using Restricted Transactional Memory instructions (Intel(r)
Transactional Synchronization Extensions). The implementation fall-backs to
the normal DPDK lock if HTM is not available or memory transactions fail. This
is not a replacement for ALL lock usages since not all critical sections
protected by locks are friendly to HTM. For example, an attempt to perform
a HW I/O operation inside a hardware memory transaction always aborts
the transaction since the CPU is not able to roll-back should the transaction
fail. Therefore, hardware transactional locks are not advised to be used around
rte_eth_rx_burst() and rte_eth_tx_burst() calls.
Acked-by: Bruce Richardson <bruce.richardson at intel.com>
v3 changes
-resolved a conflict in app/test/Makefile
-don't use angle brackets for rte_common.h include
v2 changes
-added a documentation note about hardware limitations
Roman Dementiev (3):
spinlock: add support for HTM lock elision for x86
rwlock: add support for HTM lock elision for x86
test scaling of HTM lock elision protecting rte_hash
app/test/Makefile | 1 +
app/test/test_hash_scaling.c | 223 +++++++++++++++++++++
lib/librte_eal/common/Makefile | 4 +-
.../common/include/arch/ppc_64/rte_rwlock.h | 38 ++++
.../common/include/arch/ppc_64/rte_spinlock.h | 41 ++++
lib/librte_eal/common/include/arch/x86/rte_rtm.h | 73 +++++++
.../common/include/arch/x86/rte_rwlock.h | 82 ++++++++
.../common/include/arch/x86/rte_spinlock.h | 107 ++++++++++
lib/librte_eal/common/include/generic/rte_rwlock.h | 208 +++++++++++++++++++
.../common/include/generic/rte_spinlock.h | 99 +++++++++
lib/librte_eal/common/include/rte_rwlock.h | 158 ---------------
11 files changed, 874 insertions(+), 160 deletions(-)
create mode 100644 app/test/test_hash_scaling.c
create mode 100644 lib/librte_eal/common/include/arch/ppc_64/rte_rwlock.h
create mode 100644 lib/librte_eal/common/include/arch/x86/rte_rtm.h
create mode 100644 lib/librte_eal/common/include/arch/x86/rte_rwlock.h
create mode 100644 lib/librte_eal/common/include/generic/rte_rwlock.h
delete mode 100644 lib/librte_eal/common/include/rte_rwlock.h
--
1.9.5.msysgit.0
Intel GmbH
Dornacher Strasse 1
85622 Feldkirchen/Muenchen, Deutschland
Sitz der Gesellschaft: Feldkirchen bei Muenchen
Geschaeftsfuehrer: Christian Lamprechter, Hannes Schwaderer, Douglas Lusk
Registergericht: Muenchen HRB 47456
Ust.-IdNr./VAT Registration No.: DE129385895
Citibank Frankfurt a.M. (BLZ 502 109 00) 600119052
More information about the dev
mailing list