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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Mirsad Goran Todorovac Subject: [RFC PATCH v1 1/1] net: r8169: fix the pci setup so the Realtek RTL8111/8168/8411 ethernet speeds up Date: Tue, 25 Apr 2023 13:44:56 +0200 Message-Id: <20230425114455.22706-1-mirsad.todorovac@alu.unizg.hr> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,SPF_HELO_NONE, SPF_PASS,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1764148954612032904?= X-GMAIL-MSGID: =?utf-8?q?1764148954612032904?= It was noticed that Ookla Speedtest had shown only 250 Mbps download and 310 Mbps upload where Windows 10 on the same box showed 440/310 Mbps, which is the link capacity. This article: https://www.phoronix.com/news/Intel-i219-LM-Linux-60p-Fix inspired to check our speeds. (Previously I used to think it was a network congestion, or reduction on our ISP, but now each time Windows 10 downlink speed is 440 compared to 250 Mbps in Linuxes Linux is performing at 60% of the speed.) The latest 6.3 kernel shows 95% speed up with this patch as compared to the same commit without it: :::::::::::::: speedtest/6.3.0-00436-g173ea743bf7a-dirty-1 :::::::::::::: [marvin@pc-mtodorov ~]$ speedtest -s 41437 Speedtest by Ookla Server: A1 Hrvatska d.o.o. - Zagreb (id: 41437) ISP: Croatian Academic and Research Network Idle Latency: 1.53 ms (jitter: 0.15ms, low: 1.30ms, high: 1.71ms) Download: 225.13 Mbps (data used: 199.3 MB) 1.65 ms (jitter: 20.15ms, low: 0.81ms, high: 418.27ms) Upload: 350.00 Mbps (data used: 157.9 MB) 3.35 ms (jitter: 19.46ms, low: 1.61ms, high: 474.55ms) Packet Loss: 0.0% Result URL: https://www.speedtest.net/result/c/a0084fd8-c275-4019-899a-a1590e49a34b [marvin@pc-mtodorov ~]$ speedtest -s 41437 Speedtest by Ookla Server: A1 Hrvatska d.o.o. - Zagreb (id: 41437) ISP: Croatian Academic and Research Network Idle Latency: 1.54 ms (jitter: 0.28ms, low: 1.17ms, high: 1.64ms) Download: 222.88 Mbps (data used: 207.9 MB) 10.23 ms (jitter: 31.76ms, low: 0.75ms, high: 353.79ms) Upload: 349.91 Mbps (data used: 157.7 MB) 3.27 ms (jitter: 13.05ms, low: 1.67ms, high: 236.76ms) Packet Loss: 0.0% Result URL: https://www.speedtest.net/result/c/f4c663ba-830d-44c6-8033-ce3b3b818c42 [marvin@pc-mtodorov ~]$ :::::::::::::: speedtest/6.3.0-r8169-00437-g323fe5352af6-dirty-2 :::::::::::::: [marvin@pc-mtodorov ~]$ speedtest -s 41437 Speedtest by Ookla Server: A1 Hrvatska d.o.o. - Zagreb (id: 41437) ISP: Croatian Academic and Research Network Idle Latency: 0.84 ms (jitter: 0.05ms, low: 0.82ms, high: 0.93ms) Download: 432.37 Mbps (data used: 360.5 MB) 142.43 ms (jitter: 76.45ms, low: 1.02ms, high: 1105.19ms) Upload: 346.29 Mbps (data used: 164.6 MB) 7.72 ms (jitter: 29.80ms, low: 0.92ms, high: 283.48ms) Packet Loss: 12.8% Result URL: https://www.speedtest.net/result/c/e473359e-c37e-4f29-aa9f-4b008210cf7c [marvin@pc-mtodorov ~]$ speedtest -s 41437 Speedtest by Ookla Server: A1 Hrvatska d.o.o. - Zagreb (id: 41437) ISP: Croatian Academic and Research Network Idle Latency: 0.82 ms (jitter: 0.16ms, low: 0.75ms, high: 1.05ms) Download: 440.97 Mbps (data used: 427.5 MB) 72.50 ms (jitter: 52.89ms, low: 0.91ms, high: 865.08ms) Upload: 342.75 Mbps (data used: 166.6 MB) 3.26 ms (jitter: 22.93ms, low: 1.07ms, high: 239.41ms) Packet Loss: 13.4% Result URL: https://www.speedtest.net/result/c/f393e149-38d4-4a34-acc4-5cf81ff13708 440 Mbps is the speed achieved in Windows 10, and Linux 6.3 with the patch, while 225 Mbps without this patch is running at 51% of the nominal speed with the same hardware and Linux kernel commit. Cc: David S. Miller Cc: Eric Dumazet Cc: Jakub Kicinski Cc: Paolo Abeni Cc: nic_swsd@realtek.com Cc: netdev@vger.kernel.org Link: https://bugzilla.redhat.com/show_bug.cgi?id=1671958#c60 Suggested-by: Heiner Kallweit Signed-off-by: Mirsad Goran Todorovac --- drivers/net/ethernet/realtek/r8169_main.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c index 45147a1016be..b8a04301d130 100644 --- a/drivers/net/ethernet/realtek/r8169_main.c +++ b/drivers/net/ethernet/realtek/r8169_main.c @@ -3239,6 +3239,7 @@ static void rtl_hw_start_8168h_1(struct rtl8169_private *tp) r8168_mac_ocp_write(tp, 0xc094, 0x0000); r8168_mac_ocp_write(tp, 0xc09e, 0x0000); + pci_disable_link_state(tp->pci_dev, PCIE_LINK_STATE_CLKPM); rtl_hw_aspm_clkreq_enable(tp, true); }