From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ferruh Yigit Subject: Re: [PATCH] kni: add chained mbufs support Date: Tue, 26 Apr 2016 09:05:12 +0100 Message-ID: <571F2138.2000001@intel.com> References: <1461600664-16481-1-git-send-email-ferruh.yigit@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Cc: "dev@dpdk.org" To: "Zhang, Helin" Return-path: Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by dpdk.org (Postfix) with ESMTP id A05E62A5D for ; Tue, 26 Apr 2016 10:05:14 +0200 (CEST) In-Reply-To: List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On 4/26/2016 7:49 AM, Zhang, Helin wrote: > Have you tested with it? Yes, has been tested. > I think we need to test it in a longer time, e.g. 1 hour I will make a longevity test before sending next patch. > My commetns inlined. >=20 > Thanks, > Helin >=20 >> -----Original Message----- >> From: Yigit, Ferruh >> Sent: Tuesday, April 26, 2016 12:11 AM >> To: dev@dpdk.org >> Cc: Zhang, Helin; Yigit, Ferruh >> Subject: [PATCH] kni: add chained mbufs support >> >> rx_q fifo may have chained mbufs, merge them into single skb before >> handing to the network stack. >> >> Signed-off-by: Ferruh Yigit >> --- >> .../linuxapp/eal/include/exec-env/rte_kni_common.h | 4 +- >> lib/librte_eal/linuxapp/kni/kni_net.c | 83 +++++++++++++= +++------ >> 2 files changed, 64 insertions(+), 23 deletions(-) >> >> diff --git a/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_comm= on.h >> b/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h >> index 7e5e598..2acdfd9 100644 >> --- a/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h >> +++ b/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h >> @@ -113,7 +113,9 @@ struct rte_kni_mbuf { >> void *buf_addr __attribute__((__aligned__(RTE_CACHE_LINE_SIZE))); >> char pad0[10]; >> uint16_t data_off; /**< Start address of data in segment buffer= . >> */ >> - char pad1[4]; >> + char pad1[2]; >> + uint8_t nb_segs; /**< Number of segments. */ >> + char pad4[1]; >> uint64_t ol_flags; /**< Offload features. */ >> char pad2[4]; >> uint32_t pkt_len; /**< Total pkt len: sum of all segment data_= len. >> */ >> diff --git a/lib/librte_eal/linuxapp/kni/kni_net.c >> b/lib/librte_eal/linuxapp/kni/kni_net.c >> index cfa8339..570de71 100644 >> --- a/lib/librte_eal/linuxapp/kni/kni_net.c >> +++ b/lib/librte_eal/linuxapp/kni/kni_net.c >> @@ -156,7 +156,8 @@ kni_net_rx_normal(struct kni_dev *kni) >> /* Transfer received packets to netif */ >> for (i =3D 0; i < num_rx; i++) { >> kva =3D (void *)va[i] - kni->mbuf_va + kni->mbuf_kva; >> - len =3D kva->data_len; >> + len =3D kva->pkt_len; >> + >> data_kva =3D kva->buf_addr + kva->data_off - kni->mbuf_va >> + kni->mbuf_kva; >> >> @@ -165,22 +166,41 @@ kni_net_rx_normal(struct kni_dev *kni) >> KNI_ERR("Out of mem, dropping pkts\n"); >> /* Update statistics */ >> kni->stats.rx_dropped++; >> + continue; >> } >> - else { >> - /* Align IP on 16B boundary */ >> - skb_reserve(skb, 2); >> + >> + /* Align IP on 16B boundary */ >> + skb_reserve(skb, 2); >> + >> + if (kva->nb_segs =3D=3D 0) { > I guess it should compare nb_segs with 1, but not 0. Am I wrong? >=20 Right, this needs to be 1, I will send a new patch. >> memcpy(skb_put(skb, len), data_kva, len); >> - skb->dev =3D dev; >> - skb->protocol =3D eth_type_trans(skb, dev); >> - skb->ip_summed =3D CHECKSUM_UNNECESSARY; >> + } else { >> + int nb_segs; >> + int kva_nb_segs =3D kva->nb_segs; >> >> - /* Call netif interface */ >> - netif_rx_ni(skb); >> + for (nb_segs =3D 0; nb_segs < kva_nb_segs; nb_segs++) > Kva_nb_segs might not needed at all, use kva->nb_segs directly? >=20 It is needed, kva keeps updated, so need to save number of segment for first mbuf. >> { >> + memcpy(skb_put(skb, kva->data_len), >> + data_kva, kva->data_len); >> >> - /* Update statistics */ >> - kni->stats.rx_bytes +=3D len; >> - kni->stats.rx_packets++; >> + if (!kva->next) >> + break; >> + >> + kva =3D kva->next - kni->mbuf_va + kni- >>> mbuf_kva; >> + data_kva =3D kva->buf_addr + kva->data_off >> + - kni->mbuf_va + kni->mbuf_kva; >> + } >> } >> + >> + skb->dev =3D dev; >> + skb->protocol =3D eth_type_trans(skb, dev); >> + skb->ip_summed =3D CHECKSUM_UNNECESSARY; >> + >> + /* Call netif interface */ >> + netif_rx_ni(skb); >> + >> + /* Update statistics */ >> + kni->stats.rx_bytes +=3D len; >> + kni->stats.rx_packets++; >> } >> >> /* Burst enqueue mbufs into free_q */ >> @@ -317,7 +337,7 @@ kni_net_rx_lo_fifo_skb(struct kni_dev *kni) >> /* Copy mbufs to sk buffer and then call tx interface */ >> for (i =3D 0; i < num; i++) { >> kva =3D (void *)va[i] - kni->mbuf_va + kni->mbuf_kva; >> - len =3D kva->data_len; >> + len =3D kva->pkt_len; >> data_kva =3D kva->buf_addr + kva->data_off - kni->mbuf_va + >> kni->mbuf_kva; >> >> @@ -338,20 +358,39 @@ kni_net_rx_lo_fifo_skb(struct kni_dev *kni) >> if (skb =3D=3D NULL) { >> KNI_ERR("Out of mem, dropping pkts\n"); >> kni->stats.rx_dropped++; >> + continue; >> } >> - else { >> - /* Align IP on 16B boundary */ >> - skb_reserve(skb, 2); >> + >> + /* Align IP on 16B boundary */ >> + skb_reserve(skb, 2); >> + >> + if (kva->nb_segs =3D=3D 0) { > The same commnets as above. >=20 >> memcpy(skb_put(skb, len), data_kva, len); >> - skb->dev =3D dev; >> - skb->ip_summed =3D CHECKSUM_UNNECESSARY; >> + } else { >> + int nb_segs; >> + int kva_nb_segs =3D kva->nb_segs; >> >> - kni->stats.rx_bytes +=3D len; >> - kni->stats.rx_packets++; >> + for (nb_segs =3D 0; nb_segs < kva_nb_segs; nb_segs++) > The same comments as above. >> { >> + memcpy(skb_put(skb, kva->data_len), >> + data_kva, kva->data_len); >> + >> + if (!kva->next) >> + break; >> >> - /* call tx interface */ >> - kni_net_tx(skb, dev); >> + kva =3D kva->next - kni->mbuf_va + kni- >>> mbuf_kva; >> + data_kva =3D kva->buf_addr + kva->data_off >> + - kni->mbuf_va + kni->mbuf_kva; >> + } >> } >> + >> + skb->dev =3D dev; >> + skb->ip_summed =3D CHECKSUM_UNNECESSARY; >> + >> + kni->stats.rx_bytes +=3D len; >> + kni->stats.rx_packets++; >> + >> + /* call tx interface */ >> + kni_net_tx(skb, dev); >> } >> >> /* enqueue all the mbufs from rx_q into free_q */ >> -- >> 2.5.5 >=20