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From: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
To: intel-wired-lan@lists.osuosl.org
Cc: bpf@vger.kernel.org, netdev@vger.kernel.org,
	magnus.karlsson@intel.com, bjorn.topel@intel.com,
	maciej.fijalkowski@intel.com, edwin.verplanke@intel.com,
	cristian.dumitrescu@intel.com
Subject: [PATCH net-next 2/4] i40e: remove unnecessary cleaned_count updates
Date: Thu, 14 Jan 2021 14:33:16 +0000	[thread overview]
Message-ID: <20210114143318.2171-3-cristian.dumitrescu@intel.com> (raw)
In-Reply-To: <20210114143318.2171-1-cristian.dumitrescu@intel.com>

For performance reasons, remove the redundant updates of the cleaned_count
variable, as its value can be computed based on the ring next-to-clean
variable, which is consistently udpated.

Signed-off-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e_xsk.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_xsk.c b/drivers/net/ethernet/intel/i40e/i40e_xsk.c
index dc11ecd1a55c..453ef30d9498 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_xsk.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_xsk.c
@@ -300,7 +300,6 @@ int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget)
 			bi = i40e_rx_bi(rx_ring, next_to_clean);
 			xsk_buff_free(*bi);
 			*bi = NULL;
-			cleaned_count++;
 			next_to_clean = (next_to_clean + 1) & count_mask;
 			continue;
 		}
@@ -325,7 +324,6 @@ int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget)
 			total_rx_bytes += size;
 			total_rx_packets++;
 
-			cleaned_count++;
 			next_to_clean = (next_to_clean + 1) & count_mask;
 			continue;
 		}
@@ -344,7 +342,6 @@ int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget)
 			break;
 		}
 
-		cleaned_count++;
 		next_to_clean = (next_to_clean + 1) & count_mask;
 
 		if (eth_skb_pad(skb))
@@ -358,6 +355,7 @@ int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget)
 	}
 
 	rx_ring->next_to_clean = next_to_clean;
+	cleaned_count = (next_to_clean - rx_ring->next_to_use - 1) & count_mask;
 
 	if (cleaned_count >= I40E_RX_BUFFER_WRITE)
 		failure = !i40e_alloc_rx_buffers_zc(rx_ring, cleaned_count);
-- 
2.25.1


WARNING: multiple messages have this Message-ID (diff)
From: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
To: intel-wired-lan@osuosl.org
Subject: [Intel-wired-lan] [PATCH net-next 2/4] i40e: remove unnecessary cleaned_count updates
Date: Thu, 14 Jan 2021 14:33:16 +0000	[thread overview]
Message-ID: <20210114143318.2171-3-cristian.dumitrescu@intel.com> (raw)
In-Reply-To: <20210114143318.2171-1-cristian.dumitrescu@intel.com>

For performance reasons, remove the redundant updates of the cleaned_count
variable, as its value can be computed based on the ring next-to-clean
variable, which is consistently udpated.

Signed-off-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e_xsk.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_xsk.c b/drivers/net/ethernet/intel/i40e/i40e_xsk.c
index dc11ecd1a55c..453ef30d9498 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_xsk.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_xsk.c
@@ -300,7 +300,6 @@ int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget)
 			bi = i40e_rx_bi(rx_ring, next_to_clean);
 			xsk_buff_free(*bi);
 			*bi = NULL;
-			cleaned_count++;
 			next_to_clean = (next_to_clean + 1) & count_mask;
 			continue;
 		}
@@ -325,7 +324,6 @@ int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget)
 			total_rx_bytes += size;
 			total_rx_packets++;
 
-			cleaned_count++;
 			next_to_clean = (next_to_clean + 1) & count_mask;
 			continue;
 		}
@@ -344,7 +342,6 @@ int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget)
 			break;
 		}
 
-		cleaned_count++;
 		next_to_clean = (next_to_clean + 1) & count_mask;
 
 		if (eth_skb_pad(skb))
@@ -358,6 +355,7 @@ int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget)
 	}
 
 	rx_ring->next_to_clean = next_to_clean;
+	cleaned_count = (next_to_clean - rx_ring->next_to_use - 1) & count_mask;
 
 	if (cleaned_count >= I40E_RX_BUFFER_WRITE)
 		failure = !i40e_alloc_rx_buffers_zc(rx_ring, cleaned_count);
-- 
2.25.1


  parent reply	other threads:[~2021-01-14 14:34 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-14 14:33 [PATCH net-next 0/4] i40e: small improvements on XDP path Cristian Dumitrescu
2021-01-14 14:33 ` [Intel-wired-lan] " Cristian Dumitrescu
2021-01-14 14:33 ` [PATCH net-next 1/4] i40e: remove unnecessary memory writes of the next to clean pointer Cristian Dumitrescu
2021-01-14 14:33   ` [Intel-wired-lan] " Cristian Dumitrescu
2021-01-14 14:33 ` Cristian Dumitrescu [this message]
2021-01-14 14:33   ` [Intel-wired-lan] [PATCH net-next 2/4] i40e: remove unnecessary cleaned_count updates Cristian Dumitrescu
2021-01-14 14:33 ` [PATCH net-next 3/4] i40e: remove the redundant buffer info updates Cristian Dumitrescu
2021-01-14 14:33   ` [Intel-wired-lan] " Cristian Dumitrescu
2021-01-14 14:33 ` [PATCH net-next 4/4] i40: consolidate handling of XDP program actions Cristian Dumitrescu
2021-01-14 14:33   ` [Intel-wired-lan] " Cristian Dumitrescu
2021-01-14 22:59 ` [PATCH net-next 0/4] i40e: small improvements on XDP path Saeed Mahameed
2021-01-14 22:59   ` [Intel-wired-lan] " Saeed Mahameed
2021-01-18  7:24 ` Magnus Karlsson
2021-01-18  7:31 ` Magnus Karlsson
2021-01-18  7:31   ` [Intel-wired-lan] " Magnus Karlsson
2021-01-18 18:32   ` Jakub Kicinski
2021-01-18 18:32     ` [Intel-wired-lan] " Jakub Kicinski
2021-05-07 22:11     ` Maciej Fijalkowski
2021-05-07 22:11       ` [Intel-wired-lan] " Maciej Fijalkowski
2021-05-07 22:53       ` Nguyen, Anthony L
2021-05-07 22:53         ` [Intel-wired-lan] " Nguyen, Anthony L

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