From: Sunil Goutham <sunil.kovvuri@gmail.com>
To: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Sunil.Goutham@caviumnetworks.com,
Sunil Goutham <sgoutham@cavium.com>
Subject: [PATCH 3/6] net: thunderx: Increase transmit queue length
Date: Tue, 1 Dec 2015 14:43:40 +0530 [thread overview]
Message-ID: <1448961223-41888-4-git-send-email-sunil.kovvuri@gmail.com> (raw)
In-Reply-To: <y>
From: Sunil Goutham <sgoutham@cavium.com>
Under high transmit rates and with TSO enabled observing fluctuations
in TX performance. Seen especially with iperf3 application.
Since TSO is taken care at driver level, with 64KB of TSO packets
and when window size is also high the rate at which CPU fills in
transmit descriptors is much higher than what HW is able to process.
Each 64KB TSO packet occupies gets segmented to ~43 1500 byte MTU packets
and occupies ~130 descriptors. Hence increasing transmit queue size.
Signed-off-by: Sunil Goutham <sgoutham@cavium.com>
---
drivers/net/ethernet/cavium/thunder/nicvf_queues.h | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_queues.h b/drivers/net/ethernet/cavium/thunder/nicvf_queues.h
index fb4957d..b1e93a9 100644
--- a/drivers/net/ethernet/cavium/thunder/nicvf_queues.h
+++ b/drivers/net/ethernet/cavium/thunder/nicvf_queues.h
@@ -62,7 +62,7 @@
#define SND_QUEUE_CNT 8
#define CMP_QUEUE_CNT 8 /* Max of RCV and SND qcount */
-#define SND_QSIZE SND_QUEUE_SIZE2
+#define SND_QSIZE SND_QUEUE_SIZE3
#define SND_QUEUE_LEN (1ULL << (SND_QSIZE + 10))
#define MAX_SND_QUEUE_LEN (1ULL << (SND_QUEUE_SIZE6 + 10))
#define SND_QUEUE_THRESH 2ULL
@@ -73,7 +73,7 @@
/* Keep CQ and SQ sizes same, if timestamping
* is enabled this equation will change.
*/
-#define CMP_QSIZE CMP_QUEUE_SIZE2
+#define CMP_QSIZE CMP_QUEUE_SIZE3
#define CMP_QUEUE_LEN (1ULL << (CMP_QSIZE + 10))
#define CMP_QUEUE_CQE_THRESH 0
#define CMP_QUEUE_TIMER_THRESH 220 /* 10usec */
--
1.7.1
next prev reply other threads:[~2015-12-01 9:12 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <y@samsung.com>
2012-05-22 5:57 ` [PATCH v3 2/2] regulator: Add support for MAX77686 yadi.brar01
2012-05-23 1:40 ` jonghwa3.lee
2012-05-23 4:16 ` Yadwinder Singh Brar
2012-05-23 4:40 ` jonghwa3.lee
2012-05-23 5:23 ` Yadwinder Singh Brar
2012-05-23 5:33 ` jonghwa3.lee
2012-05-23 10:18 ` Mark Brown
2012-05-23 13:02 ` Yadwinder Singh Brar
2012-05-23 6:08 ` Yadwinder Singh Brar
2012-05-23 1:50 ` jonghwa3.lee
2012-05-23 4:17 ` Yadwinder Singh Brar
2014-07-23 1:40 ` [PATCH] extcon: Add missing REGMAP_I2C/REGMAP_IRQ dependency on extcon driver Chanwoo Choi
2014-07-23 8:20 ` Krzysztof Kozlowski
2014-07-25 8:39 ` Charles Keepax
2014-08-12 2:01 ` [PATCHv2 0/5] rtc: s3c: Refactoring s3c-rtc driver and support Exynos3250 RTC y
2014-08-12 2:01 ` [PATCHv2 1/5] rtc: s3c: Define s3c_rtc structure to remove global variables y
2014-08-22 20:42 ` Andrew Morton
2014-08-25 0:57 ` Chanwoo Choi
2014-08-26 21:31 ` Andrew Morton
2014-08-28 4:49 ` Chanwoo Choi
2014-08-12 2:01 ` [PATCHv2 2/5] rtc: s3c: Remove warning message when checking coding style with checkpatch script y
2014-08-12 2:01 ` [PATCHv2 3/5] rtc: s3c: Add s3c_rtc_data structure to use variant data instead of s3c_cpu_type y
2014-08-12 2:01 ` [PATCHv2 4/5] rtc: s3c: Add support for RTC of Exynos3250 SoC y
2014-08-12 2:01 ` [PATCHv2 5/5] ARM: dts: Fix wrong compatible string of Exynos3250 RTC dt node y
2015-12-01 9:13 ` Sunil Goutham [this message]
2015-12-01 14:40 ` [PATCH 3/6] net: thunderx: Increase transmit queue length Pavel Fedin
2015-12-01 15:33 ` Eric Dumazet
2015-12-01 16:30 ` Sunil Kovvuri
2015-12-01 19:30 ` David Miller
2015-12-02 5:48 ` Sunil Kovvuri
2015-12-02 13:25 ` Eric Dumazet
2015-12-02 16:50 ` Sunil Kovvuri
2015-12-02 16:59 ` Eric Dumazet
2015-12-02 17:31 ` David Miller
2015-12-02 9:05 ` Pavel Fedin
2015-12-02 10:31 ` Pavel Fedin
2015-12-02 12:29 ` Pavel Fedin
2015-12-02 12:57 ` Sunil Kovvuri
2015-12-02 13:22 ` Pavel Fedin
2015-12-02 8:09 ` Pavel Fedin
2015-12-01 9:13 ` [PATCH 5/6] net: thunderx: Switchon carrier only upon interface link up Sunil Goutham
2015-12-01 15:32 ` Pavel Fedin
2015-12-01 16:39 ` Sunil Kovvuri
2015-12-07 5:00 ` [PATCH 0/2] net: thunderx: Miscellaneous cleanups Sunil Goutham
2015-12-07 10:33 ` Pavel Fedin
2015-12-07 18:40 ` David Miller
2015-12-09 11:38 ` [PATCH 1/2] net: thunderx: HW TSO support for pass-2 hardware Sunil Goutham
2015-12-09 12:05 ` Pavel Fedin
2015-12-09 12:24 ` Sunil Kovvuri
2015-12-09 20:26 ` David Miller
2015-12-09 11:38 ` [PATCH 2/2] net: thunderx: Enable CQE count threshold interrupt Sunil Goutham
2015-12-09 12:07 ` Pavel Fedin
2015-12-09 12:26 ` Sunil Kovvuri
2015-12-10 7:55 ` [PATCH v2 0/2] net: thunderx: Support for pass-2 hw features Sunil Goutham
2015-12-10 8:52 ` Pavel Fedin
2015-12-12 4:38 ` David Miller
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