Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754900AbaAHAPd (ORCPT ); Tue, 7 Jan 2014 19:15:33 -0500 Received: from smtp.citrix.com ([66.165.176.89]:11468 "EHLO SMTP.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754847AbaAHAPY (ORCPT ); Tue, 7 Jan 2014 19:15:24 -0500 X-IronPort-AV: E=Sophos;i="4.95,621,1384300800"; d="scan'208";a="90700272" From: Zoltan Kiss To: , , , , , CC: Zoltan Kiss Subject: [PATCH net-next v3 7/9] xen-netback: Add stat counters for frag_list skbs Date: Wed, 8 Jan 2014 00:10:16 +0000 Message-ID: <1389139818-24458-8-git-send-email-zoltan.kiss@citrix.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1389139818-24458-1-git-send-email-zoltan.kiss@citrix.com> References: <1389139818-24458-1-git-send-email-zoltan.kiss@citrix.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.80.2.133] X-DLP: MIA1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org These counters help determine how often the guest sends a packet with more than MAX_SKB_FRAGS frags. Signed-off-by: Zoltan Kiss --- drivers/net/xen-netback/common.h | 1 + drivers/net/xen-netback/interface.c | 7 +++++++ drivers/net/xen-netback/netback.c | 1 + 3 files changed, 9 insertions(+) diff --git a/drivers/net/xen-netback/common.h b/drivers/net/xen-netback/common.h index e3c28ff..c037efb 100644 --- a/drivers/net/xen-netback/common.h +++ b/drivers/net/xen-netback/common.h @@ -158,6 +158,7 @@ struct xenvif { unsigned long tx_zerocopy_sent; unsigned long tx_zerocopy_success; unsigned long tx_zerocopy_fail; + unsigned long tx_frag_overflow; /* Miscellaneous private stuff. */ struct net_device *dev; diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-netback/interface.c index ac27af3..b7daf8d 100644 --- a/drivers/net/xen-netback/interface.c +++ b/drivers/net/xen-netback/interface.c @@ -254,6 +254,13 @@ static const struct xenvif_stat { "tx_zerocopy_fail", offsetof(struct xenvif, tx_zerocopy_fail) }, + /* Number of packets exceeding MAX_SKB_FRAG slots. You should use + * a guest with the same MAX_SKB_FRAG + */ + { + "tx_frag_overflow", + offsetof(struct xenvif, tx_frag_overflow) + }, }; static int xenvif_get_sset_count(struct net_device *dev, int string_set) diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c index 9841429..4305965 100644 --- a/drivers/net/xen-netback/netback.c +++ b/drivers/net/xen-netback/netback.c @@ -1656,6 +1656,7 @@ static int xenvif_tx_submit(struct xenvif *vif, int budget) skb_shinfo(skb)->tx_flags |= SKBTX_DEV_ZEROCOPY; skb_shinfo(nskb)->tx_flags |= SKBTX_DEV_ZEROCOPY; vif->tx_zerocopy_sent += 2; + vif->tx_frag_overflow++; nskb = skb; skb = skb_copy_expand(skb, 0, 0, GFP_ATOMIC | __GFP_NOWARN); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/