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X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jose Abreu , Joao Pinto , Alexandre Torgue , linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, Maxime Coquelin , Giuseppe Cavallaro , "David S. Miller" , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org CPU Performance improvements for stmmac. Please check bellow for results before and after the series. Patch 1/7, allows RX Interrupt on Completion to be disabled and only use the RX HW Watchdog. Patch 2/7, setups the default RX coalesce settings instead of using the minimum value. Patch 3/7, enables the Transmit Buffer Unavailable interrupt on GMAC4+ cores so that we don't miss any packet that could have been coalesced. Patch 4/7 and 5/7, removes the uneeded computations for RX Flow Control activation/de-activation, on some cases. Patch 6/7, tunes-up the default coalesce settings. Patch 7/7, corrects the interpretation of TX Coalesce. NetPerf UDP Results: -------------------- Socket Message Elapsed Messages CPU Service Size Size Time Okay Errors Throughput Util Demand bytes bytes secs # # 10^6bits/sec % SS us/KB --- XGMAC@2.5G: Before 212992 1400 10.00 2100620 0 2351.7 36.69 5.112 212992 10.00 2100539 2351.6 26.18 3.648 --- XGMAC@2.5G: After 212992 1400 10.00 2116860 0 2370.4 27.61 3.816 212992 10.00 2111552 2364.5 17.41 2.407 --- GMAC5@1G: Before 212992 1400 10.00 786000 0 880.2 34.71 12.923 212992 10.00 786000 880.2 23.42 8.719 --- GMAC5@1G: After 212992 1400 10.00 847702 0 949.3 15.07 5.201 212992 10.00 847702 949.3 12.91 4.456 Perf TCP Results on RX Path: ---------------------------- --- XGMAC@2.5G: Before 22.51% swapper [stmmac] [k] dwxgmac2_dma_interrupt 10.82% swapper [stmmac] [k] dwxgmac2_host_mtl_irq_status 5.21% swapper [stmmac] [k] dwxgmac2_host_irq_status 4.67% swapper [stmmac] [k] dwxgmac3_safety_feat_irq_status 3.63% swapper [kernel.kallsyms] [k] stack_trace_consume_entry 2.74% iperf3 [kernel.kallsyms] [k] copy_user_enhanced_fast_string 2.52% swapper [kernel.kallsyms] [k] update_stack_state 1.94% ksoftirqd/0 [stmmac] [k] dwxgmac2_dma_interrupt 1.45% iperf3 [kernel.kallsyms] [k] queued_spin_lock_slowpath 1.26% swapper [kernel.kallsyms] [k] create_object --- XGMAC@2.5G: After 12.00% swapper [stmmac] [k] dwxgmac2_dma_interrupt 5.96% swapper [kernel.kallsyms] [k] stack_trace_consume_entry 5.65% swapper [stmmac] [k] dwxgmac2_host_mtl_irq_status 4.36% swapper [kernel.kallsyms] [k] update_stack_state 3.91% iperf3 [kernel.kallsyms] [k] copy_user_enhanced_fast_string 2.82% swapper [stmmac] [k] dwxgmac2_host_irq_status 2.62% swapper [stmmac] [k] dwxgmac3_safety_feat_irq_status 2.25% swapper [kernel.kallsyms] [k] create_object 2.03% swapper [stmmac] [k] stmmac_napi_poll_rx 1.97% swapper [kernel.kallsyms] [k] unwind_next_frame.part.4 --- GMAC5@1G: Before 31.29% swapper [stmmac] [k] dwmac4_dma_interrupt 14.57% swapper [stmmac] [k] dwmac4_irq_mtl_status 10.66% swapper [stmmac] [k] dwmac4_irq_status 1.97% swapper [kernel.kallsyms] [k] stack_trace_consume_entry 1.73% iperf3 [kernel.kallsyms] [k] copy_user_enhanced_fast_string 1.59% swapper [kernel.kallsyms] [k] update_stack_state 1.15% iperf3 [kernel.kallsyms] [k] do_syscall_64 1.01% ksoftirqd/0 [stmmac] [k] dwmac4_dma_interrupt 0.89% swapper [kernel.kallsyms] [k] __default_send_IPI_dest_field 0.75% swapper [stmmac] [k] stmmac_napi_poll_rx --- GMAC5@1G: After 9.27% swapper [stmmac] [k] dwmac4_dma_interrupt 6.35% swapper [kernel.kallsyms] [k] stack_trace_consume_entry 4.94% swapper [kernel.kallsyms] [k] update_stack_state 4.70% swapper [stmmac] [k] dwmac4_irq_mtl_status 3.58% swapper [stmmac] [k] dwmac4_irq_status 3.42% iperf3 [kernel.kallsyms] [k] copy_user_enhanced_fast_string 2.18% swapper [kernel.kallsyms] [k] unwind_next_frame.part.4 2.17% swapper [stmmac] [k] stmmac_napi_poll_rx 2.15% swapper [kernel.kallsyms] [k] create_object 1.26% swapper [kernel.kallsyms] [k] unwind_get_return_address --- Cc: Giuseppe Cavallaro Cc: Alexandre Torgue Cc: Jose Abreu Cc: "David S. Miller" Cc: Maxime Coquelin Cc: netdev@vger.kernel.org Cc: linux-stm32@st-md-mailman.stormreply.com Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org --- Jose Abreu (7): net: stmmac: Do not set RX IC bit if RX Coalesce is zero net: stmmac: Setup a default RX Coalesce value instead of the minimum net: stmmac: gmac4+: Enable the TBU Interrupt net: stmmac: gmac4+: Remove uneeded computation for RFA/RFD net: stmmac: xgmac: Remove uneeded computation for RFA/RFD net: stmmac: Tune-up default coalesce settings net: stmmac: TX Coalesce should be per-packet drivers/net/ethernet/stmicro/stmmac/common.h | 5 +++-- drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c | 14 ++------------ drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.h | 2 ++ drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c | 14 ++------------ drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 14 ++++++++------ 5 files changed, 17 insertions(+), 32 deletions(-) -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel