From: Bruce Richardson <bruce.richardson@intel.com>
To: Andrzej Ostruszka <aostruszka@marvell.com>
Cc: dev@dpdk.org, Aaron Conole <aconole@redhat.com>,
Michael Santana <msantana@redhat.com>,
Thomas Monjalon <thomas@monjalon.net>,
John McNamara <john.mcnamara@intel.com>,
Marko Kovacevic <marko.kovacevic@intel.com>,
David Hunt <david.hunt@intel.com>,
Vladimir Medvedkin <vladimir.medvedkin@intel.com>,
Robert Sanford <rsanford@akamai.com>,
Erik Gabriel Carrillo <erik.g.carrillo@intel.com>,
mattias.ronnblom@ericsson.com, stephen@networkplumber.org
Subject: Re: [dpdk-dev] [PATCH v4 01/10] build: add an option to enable LTO build
Date: Tue, 22 Oct 2019 13:45:43 +0100 [thread overview]
Message-ID: <20191022124543.GB955@bricha3-MOBL.ger.corp.intel.com> (raw)
In-Reply-To: <20191022115412.8837-2-aostruszka@marvell.com>
On Tue, Oct 22, 2019 at 01:54:03PM +0200, Andrzej Ostruszka wrote:
> This patch adds an option to enable link time optimization. In addition
> to LTO option itself (-flto) fat-lto-objects are being used. This is
> because during the build pmdinfogen scans the generated ELF objects to
> find this_pmd_name* symbol in symbol table. Without fat-lto-objects gcc
> produces ELF only with extra symbols for internal use during linking.
>
> Signed-off-by: Andrzej Ostruszka <aostruszka@marvell.com>
> ---
> .travis.yml | 7 ++++
> config/common_base | 5 +++
> config/meson.build | 13 +++++++
> doc/guides/prog_guide/lto.rst | 36 ++++++++++++++++++++
> doc/guides/rel_notes/release_19_11.rst | 8 +++++
> lib/librte_distributor/rte_distributor.c | 18 +++++-----
> lib/librte_distributor/rte_distributor_v20.c | 18 +++++-----
> lib/librte_lpm/rte_lpm.c | 28 +++++++--------
> lib/librte_lpm/rte_lpm6.c | 16 ++++-----
> lib/librte_timer/rte_timer.c | 20 +++++------
> mk/toolchain/gcc/rte.toolchain-compat.mk | 4 +++
> mk/toolchain/gcc/rte.vars.mk | 12 +++++++
> mk/toolchain/icc/rte.vars.mk | 8 +++++
> 13 files changed, 143 insertions(+), 50 deletions(-)
> create mode 100644 doc/guides/prog_guide/lto.rst
>
> diff --git a/.travis.yml b/.travis.yml
> index 781f9f666..70d221852 100644
> --- a/.travis.yml
> +++ b/.travis.yml
> @@ -31,6 +31,7 @@ env:
> - DEF_LIB="static" OPTS="-Denable_kmods=false"
> - DEF_LIB="shared" OPTS="-Denable_kmods=false"
> - DEF_LIB="shared" RUN_TESTS=1 BUILD_DOCS=1
> + - DEF_LIB="shared" OPTS="-Db_lto=true"
>
> matrix:
> include:
> @@ -100,6 +101,12 @@ matrix:
> apt:
> packages:
> - *extra_packages
> + - env: DEF_LIB="shared" OPTS="-Db_lto=true" EXTRA_PACKAGES=1
> + compiler: gcc
> + addons:
> + apt:
> + packages:
> + - *extra_packages
>
>
> script: ./.ci/${TRAVIS_OS_NAME}-build.sh
> diff --git a/config/common_base b/config/common_base
> index 8ef75c203..73a55fdec 100644
> --- a/config/common_base
> +++ b/config/common_base
> @@ -49,6 +49,11 @@ CONFIG_RTE_FORCE_INTRINSICS=n
> #
> CONFIG_RTE_ARCH_STRICT_ALIGN=n
>
> +#
> +# Enable link time optimization
> +#
> +CONFIG_RTE_ENABLE_LTO=n
> +
> #
> # Compile to share library
> #
> diff --git a/config/meson.build b/config/meson.build
> index 2bafea530..1a5093118 100644
> --- a/config/meson.build
> +++ b/config/meson.build
> @@ -196,3 +196,16 @@ add_project_arguments('-D_GNU_SOURCE', language: 'c')
> if is_freebsd
> add_project_arguments('-D__BSD_VISIBLE', language: 'c')
> endif
> +
> +if get_option('b_lto')
> + if cc.has_argument('-ffat-lto-objects')
> + add_project_arguments('-ffat-lto-objects', language: 'c')
> + else
> + error('compiler does not support fat LTO objects - please turn LTO off')
> + endif
> + # workaround for gcc bug 81440
> + if cc.get_id() == 'gcc' and cc.version().version_compare('<8.0')
> + add_project_arguments('-Wno-lto-type-mismatch', language: 'c')
> + add_project_link_arguments('-Wno-lto-type-mismatch', language: 'c')
> + endif
> +endif
This LGTM
> diff --git a/doc/guides/prog_guide/lto.rst b/doc/guides/prog_guide/lto.rst
> new file mode 100644
> index 000000000..b6daabc86
> --- /dev/null
<snip>
> diff --git a/mk/toolchain/gcc/rte.toolchain-compat.mk b/mk/toolchain/gcc/rte.toolchain-compat.mk
> index ea40a11c0..ad4fad83c 100644
> --- a/mk/toolchain/gcc/rte.toolchain-compat.mk
> +++ b/mk/toolchain/gcc/rte.toolchain-compat.mk
> @@ -88,6 +88,10 @@ else
> MACHINE_CFLAGS := $(filter-out -march% -mtune% -msse%,$(MACHINE_CFLAGS))
> endif
>
> + ifeq ($(shell test $(GCC_VERSION) -lt 45 && echo 1), 1)
> + CONFIG_RTE_ENABLE_LTO=n
> + endif
> +
I don't think we support GCC versions that far back any more, but this is
fairly harmless, so probably ok to keep.
Acked-by: Bruce Richardson <bruce.richarson@intel.com>
next prev parent reply other threads:[~2019-10-22 12:45 UTC|newest]
Thread overview: 110+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-17 7:57 [dpdk-dev] [PATCH v2 00/10] Add an option to use LTO for DPDK build Andrzej Ostruszka
2019-09-17 7:57 ` [dpdk-dev] [PATCH v2 01/10] build: add an option to enable LTO build Andrzej Ostruszka
2019-09-18 10:36 ` Bruce Richardson
2019-09-18 13:32 ` Ray Kinsella
2019-09-19 12:35 ` Andrzej Ostruszka
2019-09-19 13:28 ` Ray Kinsella
2019-09-19 15:16 ` Bruce Richardson
2019-09-20 7:38 ` Ray Kinsella
2019-09-23 7:23 ` Thomas Monjalon
2019-09-23 9:36 ` Ray Kinsella
2019-09-23 10:16 ` Mattias Rönnblom
2019-09-23 12:03 ` Andrzej Ostruszka
2019-09-23 12:06 ` Bruce Richardson
2019-09-23 13:02 ` Andrzej Ostruszka
2019-09-23 16:13 ` Bruce Richardson
2019-09-24 6:46 ` Andrzej Ostruszka
2019-09-24 10:25 ` Bruce Richardson
2019-09-24 11:52 ` Andrzej Ostruszka
2019-09-24 12:11 ` Bruce Richardson
2019-09-24 12:59 ` Neil Horman
2019-09-24 16:01 ` Ray Kinsella
2019-09-26 15:32 ` Andrzej Ostruszka
2019-09-27 19:55 ` Bruce Richardson
2019-09-23 12:16 ` Ray Kinsella
2019-10-27 11:31 ` Thomas Monjalon
2019-10-28 8:36 ` Andrzej Ostruszka
2019-10-28 9:07 ` Thomas Monjalon
2019-10-28 12:12 ` Andrzej Ostruszka
2019-10-28 17:16 ` Thomas Monjalon
2019-09-17 7:57 ` [dpdk-dev] [PATCH v2 02/10] eventdev: fix possible use of uninitialized var Andrzej Ostruszka
2019-10-12 13:35 ` Jerin Jacob
2019-09-17 7:57 ` [dpdk-dev] [PATCH v2 03/10] app/eventdev: fix maybe-uninitialized warnings for LTO build Andrzej Ostruszka
2019-10-12 13:52 ` Jerin Jacob
2019-09-17 7:57 ` [dpdk-dev] [PATCH v2 04/10] event/octeontx2: " Andrzej Ostruszka
2019-09-17 7:57 ` [dpdk-dev] [PATCH v2 05/10] app/test: " Andrzej Ostruszka
2019-09-17 7:57 ` [dpdk-dev] [PATCH v2 06/10] net/dpaa2: fix possible use of uninitialized vars Andrzej Ostruszka
2019-09-17 7:57 ` [dpdk-dev] [PATCH v2 07/10] net/e1000: fix maybe-uninitialized warnings for LTO build Andrzej Ostruszka
2019-09-17 7:57 ` [dpdk-dev] [PATCH v2 08/10] net/i40e: " Andrzej Ostruszka
2019-09-17 7:57 ` [dpdk-dev] [PATCH v2 09/10] net/ifc: " Andrzej Ostruszka
2019-09-17 7:57 ` [dpdk-dev] [PATCH v2 10/10] net/qede: " Andrzej Ostruszka
[not found] ` <20191021105707.25691-1-aostruszka@marvell.com>
[not found] ` <20191021105707.25691-2-aostruszka@marvell.com>
2019-10-21 12:59 ` [dpdk-dev] [PATCH v3 01/10] build: add an option to enable " Bruce Richardson
2019-10-22 8:53 ` Andrzej Ostruszka
2019-10-22 11:54 ` [dpdk-dev] [PATCH v4 00/10] Add an option to use LTO for DPDK build Andrzej Ostruszka
2019-10-22 11:54 ` [dpdk-dev] [PATCH v4 01/10] build: add an option to enable LTO build Andrzej Ostruszka
2019-10-22 12:45 ` Bruce Richardson [this message]
2019-10-27 11:47 ` Thomas Monjalon
2019-10-28 10:47 ` Andrzej Ostruszka
2019-10-28 11:03 ` Thomas Monjalon
2019-10-22 11:54 ` [dpdk-dev] [PATCH v4 02/10] eventdev: fix possible use of uninitialized var Andrzej Ostruszka
2019-10-22 11:54 ` [dpdk-dev] [PATCH v4 03/10] app/eventdev: clean LTO build warnings (maybe-uninitialized) Andrzej Ostruszka
2019-10-22 11:54 ` [dpdk-dev] [PATCH v4 04/10] event/octeontx2: " Andrzej Ostruszka
2019-10-22 11:54 ` [dpdk-dev] [PATCH v4 05/10] app/test: " Andrzej Ostruszka
2019-10-22 11:54 ` [dpdk-dev] [PATCH v4 06/10] net/dpaa2: fix possible use of uninitialized vars Andrzej Ostruszka
2019-10-22 11:54 ` [dpdk-dev] [PATCH v4 07/10] net/e1000: clean LTO build warnings (maybe-uninitialized) Andrzej Ostruszka
2019-10-22 11:54 ` [dpdk-dev] [PATCH v4 08/10] net/i40e: " Andrzej Ostruszka
2019-10-22 11:54 ` [dpdk-dev] [PATCH v4 09/10] net/ifc: " Andrzej Ostruszka
2019-10-22 11:54 ` [dpdk-dev] [PATCH v4 10/10] net/qede: " Andrzej Ostruszka
2019-10-22 12:48 ` [dpdk-dev] [PATCH v4 00/10] Add an option to use LTO for DPDK build Bruce Richardson
2019-10-22 13:03 ` Andrzej Ostruszka
2019-10-28 14:21 ` [dpdk-dev] [PATCH v5 00/11] " Andrzej Ostruszka
2019-10-28 14:21 ` [dpdk-dev] [PATCH v5 01/11] build: annotate versioned symbols with __vsym macro Andrzej Ostruszka
2019-10-29 10:49 ` Neil Horman
2019-10-28 14:21 ` [dpdk-dev] [PATCH v5 02/11] build: add an option to enable LTO build Andrzej Ostruszka
2019-10-28 14:21 ` [dpdk-dev] [PATCH v5 03/11] eventdev: fix possible use of uninitialized var Andrzej Ostruszka
2019-10-28 14:21 ` [dpdk-dev] [PATCH v5 04/11] app/eventdev: clean LTO build warnings (maybe-uninitialized) Andrzej Ostruszka
2019-10-28 14:21 ` [dpdk-dev] [PATCH v5 05/11] event/octeontx2: " Andrzej Ostruszka
2019-10-28 14:21 ` [dpdk-dev] [PATCH v5 06/11] app/test: " Andrzej Ostruszka
2019-10-28 14:21 ` [dpdk-dev] [PATCH v5 07/11] net/dpaa2: fix possible use of uninitialized vars Andrzej Ostruszka
2019-10-28 14:21 ` [dpdk-dev] [PATCH v5 08/11] net/e1000: clean LTO build warnings (maybe-uninitialized) Andrzej Ostruszka
2019-10-28 14:21 ` [dpdk-dev] [PATCH v5 09/11] net/i40e: " Andrzej Ostruszka
2019-10-28 14:21 ` [dpdk-dev] [PATCH v5 10/11] net/ifc: " Andrzej Ostruszka
2019-10-28 14:21 ` [dpdk-dev] [PATCH v5 11/11] net/qede: " Andrzej Ostruszka
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 00/12] Add an option to use LTO for DPDK build Andrzej Ostruszka
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 01/12] doc: fix description of versioning macros Andrzej Ostruszka
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 02/12] build: annotate versioned symbols with __vsym macro Andrzej Ostruszka
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 03/12] build: add an option to enable LTO build Andrzej Ostruszka
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 04/12] eventdev: fix possible use of uninitialized var Andrzej Ostruszka
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 05/12] app/eventdev: clean LTO build warnings (maybe-uninitialized) Andrzej Ostruszka
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 06/12] event/octeontx2: " Andrzej Ostruszka
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 07/12] app/test: " Andrzej Ostruszka
2019-11-01 17:15 ` Wang, Yipeng1
2019-11-04 13:48 ` Andrzej Ostruszka
2019-11-07 17:48 ` Wang, Yipeng1
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 08/12] net/dpaa2: fix possible use of uninitialized vars Andrzej Ostruszka
2019-11-04 11:46 ` Hemant Agrawal
2019-11-04 14:33 ` Andrzej Ostruszka
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 09/12] net/e1000: clean LTO build warnings (maybe-uninitialized) Andrzej Ostruszka
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 10/12] net/i40e: " Andrzej Ostruszka
2019-11-01 2:05 ` Xing, Beilei
2019-11-04 14:06 ` Andrzej Ostruszka
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 11/12] net/ifc: " Andrzej Ostruszka
2019-10-29 14:12 ` [dpdk-dev] [PATCH v6 12/12] net/qede: " Andrzej Ostruszka
2019-10-30 9:09 ` [dpdk-dev] [PATCH v6 00/12] Add an option to use LTO for DPDK build Andrzej Ostruszka
2019-10-30 14:23 ` Aaron Conole
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 " Andrzej Ostruszka
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 01/12] doc: fix description of versioning macros Andrzej Ostruszka
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 02/12] build: annotate versioned symbols with __vsym macro Andrzej Ostruszka
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 03/12] build: add an option to enable LTO build Andrzej Ostruszka
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 04/12] eventdev: fix possible use of uninitialized var Andrzej Ostruszka
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 05/12] app/eventdev: clean LTO build warnings (maybe-uninitialized) Andrzej Ostruszka
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 06/12] event/octeontx2: " Andrzej Ostruszka
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 07/12] app/test: " Andrzej Ostruszka
2019-11-07 17:53 ` Wang, Yipeng1
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 08/12] net/dpaa2: fix possible use of uninitialized vars Andrzej Ostruszka
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 09/12] net/e1000: clean LTO build warnings (maybe-uninitialized) Andrzej Ostruszka
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 10/12] net/i40e: " Andrzej Ostruszka
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 11/12] net/ifc: " Andrzej Ostruszka
2019-11-07 15:03 ` [dpdk-dev] [PATCH v7 12/12] net/qede: " Andrzej Ostruszka
2019-11-08 14:24 ` [dpdk-dev] [PATCH v7 00/12] Add an option to use LTO for DPDK build Thomas Monjalon
2019-11-01 21:33 ` [dpdk-dev] [PATCH v2 00/10] " Stephen Hemminger
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