From e2e3997c325da2f699969f09552b65d241f97d30 Mon Sep 17 00:00:00 2001 From: Reshma Pattan Date: Mon, 10 Oct 2016 22:33:13 +0100 Subject: [PATCH] mk: use -march option with recent Intel processors names The GCC 4.9 -march option supports the intel code names for processors, for example -march=silvermont, -march=broadwell. The RTE_MACHINE config flag can be used to pass code name to the compiler as -march flag. Release notes is updated. Linux and FreeBSD getting started guides are updated with recommended gcc version as 4.9 and above. Some of the gmake command examples in sample application guide and driver guides are updated with gcc version as 4.9. Signed-off-by: Reshma Pattan --- doc/guides/freebsd_gsg/build_dpdk.rst | 4 ++-- doc/guides/freebsd_gsg/build_sample_apps.rst | 6 +++--- doc/guides/linux_gsg/sys_reqs.rst | 6 +++--- doc/guides/nics/bnx2x.rst | 4 ++-- doc/guides/nics/qede.rst | 2 +- doc/guides/rel_notes/release_16_11.rst | 5 +++++ mk/target/generic/rte.vars.mk | 4 ++++ 7 files changed, 20 insertions(+), 11 deletions(-) diff --git a/doc/guides/freebsd_gsg/build_dpdk.rst b/doc/guides/freebsd_gsg/build_dpdk.rst index 27f21de7ad..24a9f879df 100644 --- a/doc/guides/freebsd_gsg/build_dpdk.rst +++ b/doc/guides/freebsd_gsg/build_dpdk.rst @@ -88,7 +88,7 @@ The ports required and their locations are as follows: For compiling and using the DPDK with gcc, the compiler must be installed from the ports collection: -* gcc: version 4.8 is recommended ``/usr/ports/lang/gcc48``. +* gcc: version 4.9 is recommended ``/usr/ports/lang/gcc49``. Ensure that ``CPU_OPTS`` is selected (default is OFF). When running the make config-recursive command, a dialog may be presented to the @@ -164,7 +164,7 @@ For example to compile for FreeBSD use: If the compiler binary to be used does not correspond to that given in the TOOLCHAIN part of the target, the compiler command may need to be explicitly specified. For example, if compiling for gcc, where the gcc binary is called - gcc4.8, the command would need to be ``gmake install T= CC=gcc4.8``. + gcc4.9, the command would need to be ``gmake install T= CC=gcc4.9``. Browsing the Installed DPDK Environment Target ---------------------------------------------- diff --git a/doc/guides/freebsd_gsg/build_sample_apps.rst b/doc/guides/freebsd_gsg/build_sample_apps.rst index 2662303d86..fffc4c01e5 100644 --- a/doc/guides/freebsd_gsg/build_sample_apps.rst +++ b/doc/guides/freebsd_gsg/build_sample_apps.rst @@ -54,7 +54,7 @@ the following variables must be exported: The following is an example of creating the ``helloworld`` application, which runs in the DPDK FreeBSD environment. While the example demonstrates compiling -using gcc version 4.8, compiling with clang will be similar, except that the ``CC=`` +using gcc version 4.9, compiling with clang will be similar, except that the ``CC=`` parameter can probably be omitted. The ``helloworld`` example may be found in the ``${RTE_SDK}/examples`` directory. @@ -72,7 +72,7 @@ in the build directory. setenv RTE_SDK $HOME/DPDK setenv RTE_TARGET x86_64-native-bsdapp-gcc - gmake CC=gcc48 + gmake CC=gcc49 CC main.o LD helloworld INSTALL-APP helloworld @@ -96,7 +96,7 @@ in the build directory. cd my_rte_app/ setenv RTE_TARGET x86_64-native-bsdapp-gcc - gmake CC=gcc48 + gmake CC=gcc49 CC main.o LD helloworld INSTALL-APP helloworld diff --git a/doc/guides/linux_gsg/sys_reqs.rst b/doc/guides/linux_gsg/sys_reqs.rst index b32154482f..3d74342159 100644 --- a/doc/guides/linux_gsg/sys_reqs.rst +++ b/doc/guides/linux_gsg/sys_reqs.rst @@ -61,8 +61,8 @@ Compilation of the DPDK * coreutils: ``cmp``, ``sed``, ``grep``, ``arch``, etc. -* gcc: versions 4.5.x or later is recommended for ``i686/x86_64``. Versions 4.8.x or later is recommended - for ``ppc_64`` and ``x86_x32`` ABI. On some distributions, some specific compiler flags and linker flags are enabled by +* gcc: versions 4.9 or later is recommended for all platforms. + On some distributions, some specific compiler flags and linker flags are enabled by default and affect performance (``-fstack-protector``, for example). Please refer to the documentation of your distribution and to ``gcc -dumpspecs``. @@ -82,7 +82,7 @@ Compilation of the DPDK .. note:: x86_x32 ABI is currently supported with distribution packages only on Ubuntu - higher than 13.10 or recent Debian distribution. The only supported compiler is gcc 4.8+. + higher than 13.10 or recent Debian distribution. The only supported compiler is gcc 4.9+. .. note:: diff --git a/doc/guides/nics/bnx2x.rst b/doc/guides/nics/bnx2x.rst index 6453168e3a..6d1768a5f1 100644 --- a/doc/guides/nics/bnx2x.rst +++ b/doc/guides/nics/bnx2x.rst @@ -162,7 +162,7 @@ To compile BNX2X PMD for FreeBSD x86_64 gcc target, run the following "gmake" command:: cd - gmake config T=x86_64-native-bsdapp-gcc install -Wl,-rpath=/usr/local/lib/gcc48 CC=gcc48 + gmake config T=x86_64-native-bsdapp-gcc install -Wl,-rpath=/usr/local/lib/gcc49 CC=gcc49 To compile BNX2X PMD for FreeBSD x86_64 gcc target, run the following "gmake" command: @@ -170,7 +170,7 @@ command: .. code-block:: console cd - gmake config T=x86_64-native-bsdapp-gcc install -Wl,-rpath=/usr/local/lib/gcc48 CC=gcc48 + gmake config T=x86_64-native-bsdapp-gcc install -Wl,-rpath=/usr/local/lib/gcc49 CC=gcc49 Linux ----- diff --git a/doc/guides/nics/qede.rst b/doc/guides/nics/qede.rst index 53d749c9b1..3af755e551 100644 --- a/doc/guides/nics/qede.rst +++ b/doc/guides/nics/qede.rst @@ -150,7 +150,7 @@ command:: cd gmake config T=x86_64-native-bsdapp-gcc install -Wl,-rpath=\ - /usr/local/lib/gcc48 CC=gcc48 + /usr/local/lib/gcc49 CC=gcc49 Sample Application Notes diff --git a/doc/guides/rel_notes/release_16_11.rst b/doc/guides/rel_notes/release_16_11.rst index 25c447dfd7..25b1ba9f82 100644 --- a/doc/guides/rel_notes/release_16_11.rst +++ b/doc/guides/rel_notes/release_16_11.rst @@ -98,6 +98,11 @@ New Features * AES CBC IV generation with cipher forward function * AES GCM/CTR mode +* **Added support for new gcc -march option.** + + The GCC 4.9 ``-march`` option supports the Intel processor code names. + The config option ``RTE_MACHINE`` can be used to pass code names to the compiler as ``-march`` flag. + Resolved Issues --------------- diff --git a/mk/target/generic/rte.vars.mk b/mk/target/generic/rte.vars.mk index 75a616abab..b31e426653 100644 --- a/mk/target/generic/rte.vars.mk +++ b/mk/target/generic/rte.vars.mk @@ -50,7 +50,11 @@ # - can define CPU_ASFLAGS variable (overriden by cmdline value) that # overrides the one defined in arch. # +ifneq ($(wildcard $(RTE_SDK)/mk/machine/$(RTE_MACHINE)/rte.vars.mk),) include $(RTE_SDK)/mk/machine/$(RTE_MACHINE)/rte.vars.mk +else +MACHINE_CFLAGS := -march=$(RTE_MACHINE) +endif # # arch: -- 2.20.1