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[194.187.74.233]) by smtp.gmail.com with ESMTPSA id s16sm5404420lji.61.2019.04.09.02.30.56 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 09 Apr 2019 02:30:56 -0700 (PDT) From: =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= To: openwrt-devel@lists.openwrt.org Date: Tue, 9 Apr 2019 11:30:46 +0200 Message-Id: <20190409093046.13401-1-zajec5@gmail.com> X-Mailer: git-send-email 2.21.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190409_023100_712987_B46203DB X-CRM114-Status: GOOD ( 10.20 ) X-Spam-Score: 0.1 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (0.1 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2a00:1450:4864:20:0:0:0:12d listed in] [list.dnswl.org] 0.2 FREEMAIL_ENVFROM_END_DIGIT Envelope-from freemail username ends in digit (zajec5[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (zajec5[at]gmail.com) -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature Subject: [OpenWrt-Devel] [PATCH RFC] kernel: drop -fno-reorder-blocks X-BeenThere: openwrt-devel@lists.openwrt.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= Sender: "openwrt-devel" Errors-To: openwrt-devel-bounces+incoming=patchwork.ozlabs.org@lists.openwrt.org From: Rafał Miłecki Dropping this option significantly improves NAT performance on BCM5301X (bcm53xx) for LAN to WAN traffic with GRO disabled (+14%). It slightly affects kernel size - it gets bigger by 1,5% - 3% depending on a target. Unfortunately this change may decrease NAT performance for some other platforms (targets). It seems to e.g. affect mt7621 with GRO enabled. https://www.gnu.org/software/gcc/news/reorder.html Following testing results come from OpenWrt with kernel 4.14.109 using OpenWrt's default fq_codel. ********** 1) bcm53xx: BCM47094 SoC (echo 2 > rps_cpus) zImage size: 1840424 → 1871328 (+1,68%) a) gro off LAN to WAN: 824 Mb/s → 940 Mb/s (+14,08%) WAN to LAN: 935 Mb/s → 940 Mb/s (+0,53%) b) gro on LAN to WAN: 512 Mb/s → 534 Mb/s (+4,30%) WAN to LAN: 539 Mb/s → 549 Mb/s (+1,85%) ********** 2) brcm47xx: BCM4706 SoC vmlinux.lzma: 1536486 → 1588082 (+3,36%) a) gro off LAN to WAN: 152 Mb/s → 157 Mb/s (+3,29%) WAN to LAN: 191 Mb/s → 182 Mb/s (-4,71%) b) gro on LAN to WAN: 223 Mb/s → 226 Mb/s (+1,35%) WAN to LAN: 214 Mb/s → 214 Mb/s (+0,00%) ********** 3) ramips/mt7621: Ubiquiti ER-X (echo 8 > rps_cpus) vmlinux size: 6084176 → 6248016 (+2,69%) a) gro off LAN to WAN: 415 Mb/s → 418 Mb/s (+0,07%) WAN to LAN: 509 Mb/s → 543 Mb/s (+6,68%) b) gro on LAN to WAN: 640 Mb/s → 537 Mb/s (-16,09%) WAN to LAN: 748 Mb/s → 683 Mb/s (-8,69%) c) gro on [another run] LAN to WAN: 648 Mb/s → 530 Mb/s (-18,20%) WAN to LAN: 782 Mb/s → 691 Mb/s (-11,64%) ********** 4) ar71xx: Netgear WNR2200 (AR7241) vmlinux size: 5106084 → 5244996 (+2,72%) a) gro off LAN to WAN: 94.1 Mb/s → 94.2 Mb/s (~ +0%) WAN to LAN: 94.2 Mb/s → 94.2 Mb/s (~ +0%) b) gro on LAN to WAN: 94.2 Mb/s → 94.2 Mb/s (~ +0%) WAN to LAN: 94.1 Mb/s → 94.2 Mb/s (~ +0%) ********** Signed-off-by: Rafał Miłecki --- target/linux/generic/pending-4.14/201-extra_optimization.patch | 2 +- target/linux/generic/pending-4.19/201-extra_optimization.patch | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/target/linux/generic/pending-4.14/201-extra_optimization.patch b/target/linux/generic/pending-4.14/201-extra_optimization.patch index c7790657fd..3f7613d3dd 100644 --- a/target/linux/generic/pending-4.14/201-extra_optimization.patch +++ b/target/linux/generic/pending-4.14/201-extra_optimization.patch @@ -26,7 +26,7 @@ Signed-off-by: Felix Fietkau +KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,) $(EXTRA_OPTIMIZATION) else -KBUILD_CFLAGS += -O2 -+KBUILD_CFLAGS += -O2 -fno-reorder-blocks -fno-tree-ch $(EXTRA_OPTIMIZATION) ++KBUILD_CFLAGS += -O2 -fno-tree-ch $(EXTRA_OPTIMIZATION) endif endif diff --git a/target/linux/generic/pending-4.19/201-extra_optimization.patch b/target/linux/generic/pending-4.19/201-extra_optimization.patch index d86e29fc75..f002c49676 100644 --- a/target/linux/generic/pending-4.19/201-extra_optimization.patch +++ b/target/linux/generic/pending-4.19/201-extra_optimization.patch @@ -26,7 +26,7 @@ Signed-off-by: Felix Fietkau +KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,) $(EXTRA_OPTIMIZATION) else -KBUILD_CFLAGS += -O2 -+KBUILD_CFLAGS += -O2 -fno-reorder-blocks -fno-tree-ch $(EXTRA_OPTIMIZATION) ++KBUILD_CFLAGS += -O2 -fno-tree-ch $(EXTRA_OPTIMIZATION) endif endif