[dpdk-dev] [PATCH v1 0/5] examples: add performance thread example

ibetts ian.betts at intel.com
Wed Sep 30 16:29:43 CEST 2015


From: Ian Betts <ian.betts at intel.com>

Performance thread example application
 
This example comprises layer 3 forwarding derivative intended to
facilitate characterization of performance with different 
threading models, specifically:- 

1. EAL threads running on different physical cores
2. EAL threads running on the same physical core
3. Lightweight threads running in an EAL thread

Purpose and justification

Since dpdk 2.0 it has been possible to assign multiple EAL threads to 
a physical core ( case 2 above ).
Currently no example application has focused on demonstrating the 
performance constraints of differing threading models.

Whilst purpose built applications that fully comprehend the DPDK 
single threaded programming model will always yield superior 
performance, the desire to preserve ROI in legacy code written for 
multithreaded operating environments  makes lightweight threads ( case 
3 above ) worthy of consideration.

As well as aiding with legacy code reuse, it is anticipated that 
lightweight threads will make it possible to scale a multithreaded 
application with fine granularity allowing an application  to more 
easily take advantage of headroom on EAL cores, or conversely occupy 
more cores, as dictated by system load.

To explore performance with lightweight threads a simple cooperative 
scheduler subsystem is being included in this example application.
If the expected benefits and use cases prove to be of value, it is 
anticipated that this lightweight thread subsystem would become a 
library in some future DPDK release.

A simple pthread shim in the form of a hello world example is also
included.


Ian Betts (5):
  doc: add performance-thread sample application guide
  examples: add cooperative scheduler subsytem for performance-thread
    app
  examples: add l3fwd-thread in performance-thread sample app
  examples: add pthread-shim in performance-thread sample app
  config: add build files for performance-thread-app

 config/common_linuxapp                             |    6 +
 config/defconfig_i686-native-linuxapp-gcc          |    6 +
 config/defconfig_i686-native-linuxapp-icc          |    6 +
 config/defconfig_x86_x32-native-linuxapp-gcc       |    6 +
 doc/guides/rel_notes/release_2_2.rst               |    6 +
 doc/guides/sample_app_ug/index.rst                 |    1 +
 doc/guides/sample_app_ug/performance_thread.rst    | 1221 +++++++
 examples/Makefile                                  |    1 +
 .../performance-thread/common/arch/x86/atomic.h    |   60 +
 examples/performance-thread/common/arch/x86/ctx.c  |   66 +
 examples/performance-thread/common/arch/x86/ctx.h  |   57 +
 examples/performance-thread/common/common.mk       |   40 +
 examples/performance-thread/common/lthread.c       |  528 +++
 examples/performance-thread/common/lthread.h       |   99 +
 examples/performance-thread/common/lthread_api.h   |  822 +++++
 examples/performance-thread/common/lthread_cond.c  |  228 ++
 examples/performance-thread/common/lthread_cond.h  |   77 +
 examples/performance-thread/common/lthread_diag.c  |  315 ++
 examples/performance-thread/common/lthread_diag.h  |  129 +
 .../performance-thread/common/lthread_diag_api.h   |  295 ++
 examples/performance-thread/common/lthread_int.h   |  212 ++
 examples/performance-thread/common/lthread_mutex.c |  244 ++
 examples/performance-thread/common/lthread_mutex.h |   52 +
 .../performance-thread/common/lthread_objcache.h   |  160 +
 examples/performance-thread/common/lthread_pool.h  |  338 ++
 examples/performance-thread/common/lthread_queue.h |  303 ++
 examples/performance-thread/common/lthread_sched.c |  644 ++++
 examples/performance-thread/common/lthread_sched.h |  152 +
 examples/performance-thread/common/lthread_timer.h |   47 +
 examples/performance-thread/common/lthread_tls.c   |  242 ++
 examples/performance-thread/common/lthread_tls.h   |   64 +
 examples/performance-thread/l3fwd-thread/Makefile  |   57 +
 examples/performance-thread/l3fwd-thread/main.c    | 3355 ++++++++++++++++++++
 examples/performance-thread/pthread_shim/Makefile  |   61 +
 examples/performance-thread/pthread_shim/main.c    |  287 ++
 .../performance-thread/pthread_shim/pthread_shim.c |  717 +++++
 .../performance-thread/pthread_shim/pthread_shim.h |  113 +
 37 files changed, 11017 insertions(+)
 create mode 100644 doc/guides/sample_app_ug/performance_thread.rst
 create mode 100644 examples/performance-thread/common/arch/x86/atomic.h
 create mode 100644 examples/performance-thread/common/arch/x86/ctx.c
 create mode 100644 examples/performance-thread/common/arch/x86/ctx.h
 create mode 100644 examples/performance-thread/common/common.mk
 create mode 100644 examples/performance-thread/common/lthread.c
 create mode 100644 examples/performance-thread/common/lthread.h
 create mode 100644 examples/performance-thread/common/lthread_api.h
 create mode 100644 examples/performance-thread/common/lthread_cond.c
 create mode 100644 examples/performance-thread/common/lthread_cond.h
 create mode 100644 examples/performance-thread/common/lthread_diag.c
 create mode 100644 examples/performance-thread/common/lthread_diag.h
 create mode 100644 examples/performance-thread/common/lthread_diag_api.h
 create mode 100644 examples/performance-thread/common/lthread_int.h
 create mode 100644 examples/performance-thread/common/lthread_mutex.c
 create mode 100644 examples/performance-thread/common/lthread_mutex.h
 create mode 100644 examples/performance-thread/common/lthread_objcache.h
 create mode 100644 examples/performance-thread/common/lthread_pool.h
 create mode 100644 examples/performance-thread/common/lthread_queue.h
 create mode 100644 examples/performance-thread/common/lthread_sched.c
 create mode 100644 examples/performance-thread/common/lthread_sched.h
 create mode 100644 examples/performance-thread/common/lthread_timer.h
 create mode 100644 examples/performance-thread/common/lthread_tls.c
 create mode 100644 examples/performance-thread/common/lthread_tls.h
 create mode 100644 examples/performance-thread/l3fwd-thread/Makefile
 create mode 100644 examples/performance-thread/l3fwd-thread/main.c
 create mode 100644 examples/performance-thread/pthread_shim/Makefile
 create mode 100644 examples/performance-thread/pthread_shim/main.c
 create mode 100644 examples/performance-thread/pthread_shim/pthread_shim.c
 create mode 100644 examples/performance-thread/pthread_shim/pthread_shim.h

-- 
1.9.3



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