DPDK patches and discussions
 help / color / mirror / Atom feed
From: Roman Dementiev <roman.dementiev@intel.com>
To: dev@dpdk.org
Subject: [dpdk-dev] [PATCH v2 0/3] add support for HTM lock elision for x86
Date: Tue, 16 Jun 2015 10:16:43 -0700	[thread overview]
Message-ID: <1434475006-13732-1-git-send-email-roman.dementiev@intel.com> (raw)
In-Reply-To: <1433250693-23644-1-git-send-email-roman.dementiev@intel.com>

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.

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

  parent reply	other threads:[~2015-06-16 17:17 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-06-02 13:11 [dpdk-dev] " Roman Dementiev
2015-06-02 13:11 ` [dpdk-dev] [PATCH 1/3] spinlock: " Roman Dementiev
2015-06-02 13:11 ` [dpdk-dev] [PATCH 2/3] rwlock: " Roman Dementiev
2015-06-02 13:11 ` [dpdk-dev] [PATCH 3/3] test scaling of HTM lock elision protecting rte_hash Roman Dementiev
     [not found] ` <CADNuJVpeKa9-R7WHkoCzw82vpYd=3XmhOoz2JfGsFLzDW+F5UQ@mail.gmail.com>
2015-06-02 13:39   ` [dpdk-dev] add support for HTM lock elision for x86 Dementiev, Roman
2015-06-02 14:55   ` Roman Dementiev
2015-06-03 18:40 ` Stephen Hemminger
2015-06-05 15:12   ` Roman Dementiev
2015-06-16 17:16 ` Roman Dementiev [this message]
2015-06-16 17:16   ` [dpdk-dev] [PATCH v2 1/3] spinlock: " Roman Dementiev
2015-06-17 21:29     ` Thomas Monjalon
2015-06-18 10:00       ` Bruce Richardson
2015-06-19 13:35         ` Thomas Monjalon
2015-06-22 15:32           ` Adrien Mazarguil
2015-06-29  9:34           ` [dpdk-dev] [PATCH] eal: fix cpu_feature_table[] compilation with -pedantic Adrien Mazarguil
2015-06-29 12:10             ` David Marchand
2015-06-29 12:19               ` Thomas Monjalon
2015-06-16 17:16   ` [dpdk-dev] [PATCH v2 2/3] rwlock: add support for HTM lock elision for x86 Roman Dementiev
2015-06-16 17:16   ` [dpdk-dev] [PATCH v2 3/3] test scaling of HTM lock elision protecting rte_hash Roman Dementiev
2015-06-17 13:05   ` [dpdk-dev] [PATCH v2 0/3] add support for HTM lock elision for x86 Bruce Richardson
2015-06-17 13:14     ` Thomas Monjalon
2015-06-17 13:48       ` Bruce Richardson
2015-06-19 11:08   ` [dpdk-dev] [PATCH v3 " Roman Dementiev
2015-06-19 11:08     ` [dpdk-dev] [PATCH v3 1/3] spinlock: " Roman Dementiev
2015-06-19 11:08     ` [dpdk-dev] [PATCH v3 2/3] rwlock: " Roman Dementiev
2015-06-19 11:08     ` [dpdk-dev] [PATCH v3 3/3] test scaling of HTM lock elision protecting rte_hash Roman Dementiev
2015-06-19 14:38     ` [dpdk-dev] [PATCH v3 0/3] add support for HTM lock elision for x86 Thomas Monjalon

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1434475006-13732-1-git-send-email-roman.dementiev@intel.com \
    --to=roman.dementiev@intel.com \
    --cc=dev@dpdk.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).