- Linuxarm - mailweb.openeuler.org

[PATCH net-next v2 0/2] add benchmark selftest and optimization for ptr_ring
by Yunsheng Lin 28 Jun '21

28 Jun '21

Patch 1: add a selftest app to benchmark the performance of ptr_ring. Patch 2: make __ptr_ring_empty() checking more reliable and use the just added selftest to benchmark the performance impact. V2: add patch 1 and add performance data for patch 2. Yunsheng Lin (2): selftests/ptr_ring: add benchmark application for ptr_ring ptr_ring: make __ptr_ring_empty() checking more reliable MAINTAINERS | 5 + include/linux/ptr_ring.h | 25 ++- tools/testing/selftests/ptr_ring/Makefile | 6 + tools/testing/selftests/ptr_ring/ptr_ring_test.c | 249 +++++++++++++++++++++++ tools/testing/selftests/ptr_ring/ptr_ring_test.h | 150 ++++++++++++++ 5 files changed, 426 insertions(+), 9 deletions(-) create mode 100644 tools/testing/selftests/ptr_ring/Makefile create mode 100644 tools/testing/selftests/ptr_ring/ptr_ring_test.c create mode 100644 tools/testing/selftests/ptr_ring/ptr_ring_test.h -- 2.7.4

3 19

[PATCH net] net: hns3: Fixes+Refactors the broken set channel error fallback logic
by Salil Mehta 25 Jun '21

25 Jun '21

The fallback logic of the set channels when set_channel() fails to configure TX Sched/RSS H/W configuration or for the code which brings down/restores client before/therafter is not handled properly. Fix and refactor the code for handling the errors properly and to improve the readibility. Fixes: 3a5a5f06d4d2 ("net: hns3: revert to old channel when setting new channel num fail") Signed-off-by: Salil Mehta <salil.mehta(a)huawei.com> Signed-off-by: Peng Li <lipeng321(a)huawei.com> --- .../net/ethernet/hisilicon/hns3/hns3_enet.c | 77 +++++++++++-------- 1 file changed, 47 insertions(+), 30 deletions(-) diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c index bf4302a5cf95..fbb0f4c9b98e 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c @@ -4692,24 +4692,60 @@ static int hns3_reset_notify(struct hnae3_handle *handle, static int hns3_change_channels(struct hnae3_handle *handle, u32 new_tqp_num, bool rxfh_configured) { - int ret; + const struct hnae3_ae_ops *ops = handle->ae_algo->ops; + u32 org_tqp_num = handle->kinfo.num_tqps; + struct device *dev = &handle->pdev->dev; + u32 req_tqp_num = new_tqp_num; + bool revert_old_config = false; + int ret, retval = 0; + + /* bring down the client */ + ret = hns3_reset_notify(handle, HNAE3_DOWN_CLIENT); + if (ret) { + dev_err(dev, "client down fail, this should'nt have happened!\n"); + return ret; + } - ret = handle->ae_algo->ops->set_channels(handle, new_tqp_num, - rxfh_configured); + ret = hns3_reset_notify(handle, HNAE3_UNINIT_CLIENT); if (ret) { - dev_err(&handle->pdev->dev, - "Change tqp num(%u) fail.\n", new_tqp_num); + dev_err(dev, "client uninit fail, this should'nt have happened!\n"); return ret; } +revert_old_tpqs_config: + /* update the TX Sched and RSS config in the H/W */ + ret = ops->set_channels(handle, req_tqp_num, rxfh_configured); + if (ret) { + dev_err(dev, "TX Sched/RSS H/W cfg fail(=%d) for %s TPQs\n", + ret, revert_old_config ? "old" : "new"); + goto err_set_channel; + } + + /* restore the client */ ret = hns3_reset_notify(handle, HNAE3_INIT_CLIENT); - if (ret) - return ret; + if (ret) { + dev_err(dev, "failed to initialize the client again\n"); + goto err_set_channel; + } ret = hns3_reset_notify(handle, HNAE3_UP_CLIENT); - if (ret) - hns3_reset_notify(handle, HNAE3_UNINIT_CLIENT); + if (ret) { + dev_err(dev, "Client up fail, this should'nt have happened!\n"); + return ret; + } + + return retval; +err_set_channel: + if (!revert_old_config) { + dev_warn(dev, "Revert TX Sched/RSS H/W config with old TPQs\n"); + req_tqp_num = org_tqp_num; + revert_old_config = true; + retval = ret; + goto revert_old_tpqs_config; + } + dev_err(dev, "Bad, we could'nt revert to old TPQ H/W config\n"); + dev_warn(dev, "Device maybe insane. Reload driver/Reset required!\n"); return ret; } @@ -4720,7 +4756,6 @@ int hns3_set_channels(struct net_device *netdev, struct hnae3_knic_private_info *kinfo = &h->kinfo; bool rxfh_configured = netif_is_rxfh_configured(netdev); u32 new_tqp_num = ch->combined_count; - u16 org_tqp_num; int ret; if (hns3_nic_resetting(netdev)) @@ -4750,28 +4785,10 @@ int hns3_set_channels(struct net_device *netdev, "set channels: tqp_num=%u, rxfh=%d\n", new_tqp_num, rxfh_configured); - ret = hns3_reset_notify(h, HNAE3_DOWN_CLIENT); - if (ret) - return ret; - - ret = hns3_reset_notify(h, HNAE3_UNINIT_CLIENT); - if (ret) - return ret; - - org_tqp_num = h->kinfo.num_tqps; ret = hns3_change_channels(h, new_tqp_num, rxfh_configured); if (ret) { - int ret1; - - netdev_warn(netdev, - "Change channels fail, revert to old value\n"); - ret1 = hns3_change_channels(h, org_tqp_num, rxfh_configured); - if (ret1) { - netdev_err(netdev, - "revert to old channel fail\n"); - return ret1; - } - + netdev_err(netdev, "fail(=%d) to set number of channels to %u\n", ret, + new_tqp_num); return ret; } -- 2.17.1

3 6

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1 0

[PATCH net-next v3 0/3] Some optimization for lockless qdisc
by Yunsheng Lin 24 Jun '21

24 Jun '21

Patch 1: remove unnecessary seqcount operation. Patch 2: implement TCQ_F_CAN_BYPASS. Patch 3: remove qdisc->empty. Performance data for pktgen in queue_xmit mode + dummy netdev with pfifo_fast: threads unpatched patched delta 1 2.60Mpps 3.21Mpps +23% 2 3.84Mpps 5.56Mpps +44% 4 5.52Mpps 5.58Mpps +1% 8 2.77Mpps 2.76Mpps -0.3% 16 2.24Mpps 2.23Mpps -0.4% Performance for IP forward testing: 1.05Mpps increases to 1.16Mpps, about 10% improvement. V3: Add 'Acked-by' from Jakub and 'Tested-by' from Vladimir, and resend based on latest net-next. V2: Adjust the comment and commit log according to discussion in V1. V1: Drop RFC tag, add nolock_qdisc_is_empty() and do the qdisc empty checking without the protection of qdisc->seqlock to aviod doing unnecessary spin_trylock() for contention case. RFC v4: Use STATE_MISSED and STATE_DRAINING to indicate non-empty qdisc, and add patch 1 and 3. Yunsheng Lin (3): net: sched: avoid unnecessary seqcount operation for lockless qdisc net: sched: implement TCQ_F_CAN_BYPASS for lockless qdisc net: sched: remove qdisc->empty for lockless qdisc include/net/sch_generic.h | 31 ++++++++++++++++++------------- net/core/dev.c | 27 +++++++++++++++++++++++++-- net/sched/sch_generic.c | 23 ++++++++++++++++------- 3 files changed, 59 insertions(+), 22 deletions(-) -- 2.7.4

2 4

[PATCH V2 net-next 0/3] net: hns3: add support for TX push
by Yufeng Mo 22 Jun '21

22 Jun '21

This series adds TX push support for the HNS3 ethernet driver. V1 -> V2: 1. fix compile issue on non-arm64 system in patch #2 Huazhong Tan (2): net: hns3: add support for TX push mode net: hns3: add ethtool priv-flag for TX push Xiongfeng Wang (1): arm64: barrier: add DGH macros to control memory accesses merging arch/arm64/include/asm/assembler.h | 7 ++ arch/arm64/include/asm/barrier.h | 1 + drivers/net/ethernet/hisilicon/hns3/hnae3.h | 2 + drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 86 +++++++++++++++++++++- drivers/net/ethernet/hisilicon/hns3/hns3_enet.h | 6 ++ drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c | 21 +++++- .../net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.c | 2 + .../ethernet/hisilicon/hns3/hns3pf/hclge_main.c | 11 ++- .../ethernet/hisilicon/hns3/hns3pf/hclge_main.h | 8 ++ .../ethernet/hisilicon/hns3/hns3vf/hclgevf_cmd.c | 2 + .../ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c | 11 ++- .../ethernet/hisilicon/hns3/hns3vf/hclgevf_main.h | 8 ++ 12 files changed, 156 insertions(+), 9 deletions(-) -- 2.8.1

1 3

[PATCH net v2] net: sched: add barrier to ensure correct ordering for lockless qdisc
by Yunsheng Lin 22 Jun '21

22 Jun '21

The spin_trylock() was assumed to contain the implicit barrier needed to ensure the correct ordering between STATE_MISSED setting/clearing and STATE_MISSED checking in commit a90c57f2cedd ("net: sched: fix packet stuck problem for lockless qdisc"). But it turns out that spin_trylock() only has load-acquire semantic, for strongly-ordered system(like x86), the compiler barrier implicitly contained in spin_trylock() seems enough to ensure the correct ordering. But for weakly-orderly system (like arm64), the store-release semantic is needed to ensure the correct ordering as clear_bit() and test_bit() is store operation, see queued_spin_lock(). So add the explicit barrier to ensure the correct ordering for the above case. Fixes: a90c57f2cedd ("net: sched: fix packet stuck problem for lockless qdisc") Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> --- V2: add the missing Fixes tag. The above ordering issue can easily cause out of order packet problem when testing lockless qdisc bypass patchset [1] with two iperf threads and one netdev queue in arm64 system. 1. https://lkml.org/lkml/2021/6/2/1417 --- include/net/sch_generic.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h index 1e62551..5771030 100644 --- a/include/net/sch_generic.h +++ b/include/net/sch_generic.h @@ -163,6 +163,12 @@ static inline bool qdisc_run_begin(struct Qdisc *qdisc) if (spin_trylock(&qdisc->seqlock)) goto nolock_empty; + /* Paired with smp_mb__after_atomic() to make sure + * STATE_MISSED checking is synchronized with clearing + * in pfifo_fast_dequeue(). + */ + smp_mb__before_atomic(); + /* If the MISSED flag is set, it means other thread has * set the MISSED flag before second spin_trylock(), so * we can return false here to avoid multi cpus doing @@ -180,6 +186,12 @@ static inline bool qdisc_run_begin(struct Qdisc *qdisc) */ set_bit(__QDISC_STATE_MISSED, &qdisc->state); + /* spin_trylock() only has load-acquire semantic, so use + * smp_mb__after_atomic() to ensure STATE_MISSED is set + * before doing the second spin_trylock(). + */ + smp_mb__after_atomic(); + /* Retry again in case other CPU may not see the new flag * after it releases the lock at the end of qdisc_run_end(). */ -- 2.7.4

3 4

[PATCH net-next 0/3] net: hns3: add support for TX push
by Yufeng Mo 21 Jun '21

21 Jun '21

This series adds TX push support for the HNS3 ethernet driver. Huazhong Tan (2): net: hns3: add support for TX push mode net: hns3: add ethtool priv-flag for TX push Xiongfeng Wang (1): arm64: barrier: Add DGH macros to control memory accesses merging arch/arm64/include/asm/assembler.h | 7 ++ arch/arm64/include/asm/barrier.h | 1 + drivers/net/ethernet/hisilicon/hns3/hnae3.h | 2 + drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 82 ++++++++++++++++++++-- drivers/net/ethernet/hisilicon/hns3/hns3_enet.h | 6 ++ drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c | 21 +++++- .../net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.c | 2 + .../ethernet/hisilicon/hns3/hns3pf/hclge_main.c | 11 ++- .../ethernet/hisilicon/hns3/hns3pf/hclge_main.h | 8 +++ .../ethernet/hisilicon/hns3/hns3vf/hclgevf_cmd.c | 2 + .../ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c | 11 ++- .../ethernet/hisilicon/hns3/hns3vf/hclgevf_main.h | 8 +++ 12 files changed, 152 insertions(+), 9 deletions(-) -- 2.8.1

3 5

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20 Jun '21

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1 0

[PATCH net-next 0/9] net: hns3: refactor and new features for flow director
by Huazhong Tan 19 Jun '21

19 Jun '21

This patchset refactor some functions and add some new features for flow director. patch 1~3: refactor large functions patch 4, 7: add traffic class and user-def field support for ethtool patch 5: use asynchronously configuration patch 6: clean up for hns3_del_all_fd_entries() patch 8, 9: add support for queue bonding mode Jian Shen (9): net: hns3: refactor out hclge_add_fd_entry() net: hns3: refactor out hclge_fd_get_tuple() net: hns3: refactor for function hclge_fd_convert_tuple net: hns3: add support for traffic class tuple support for flow director by ethtool net: hns3: refactor flow director configuration net: hns3: refine for hns3_del_all_fd_entries() net: hns3: add support for user-def data of flow director net: hns3: add support for queue bonding mode of flow director net: hns3: add queue bonding mode support for VF drivers/net/ethernet/hisilicon/hns3/hclge_mbx.h | 8 + drivers/net/ethernet/hisilicon/hns3/hnae3.h | 9 +- drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c | 7 +- drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 91 +- drivers/net/ethernet/hisilicon/hns3/hns3_enet.h | 14 +- drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c | 13 +- .../net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.c | 2 + .../net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h | 21 + .../ethernet/hisilicon/hns3/hns3pf/hclge_main.c | 1570 ++++++++++++++------ .../ethernet/hisilicon/hns3/hns3pf/hclge_main.h | 63 + .../net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c | 33 + .../ethernet/hisilicon/hns3/hns3vf/hclgevf_cmd.c | 2 + .../ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c | 74 + .../ethernet/hisilicon/hns3/hns3vf/hclgevf_main.h | 7 + .../ethernet/hisilicon/hns3/hns3vf/hclgevf_mbx.c | 17 + 15 files changed, 1450 insertions(+), 481 deletions(-) -- 2.7.4

4 20

[PATCH net-next] net: fix mistake path for netdev_features_strings
by Jian Shen 18 Jun '21

18 Jun '21

Th_strings arrays netdev_features_strings, tunable_strings, and phy_tunable_strings has been moved to file net/ethtool/common.c. So fixes the comment. Signed-off-by: Jian Shen <shenjian15(a)huawei.com> --- include/linux/netdev_features.h | 2 +- include/uapi/linux/ethtool.h | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h index 3de38d6..2c6b9e4 100644 --- a/include/linux/netdev_features.h +++ b/include/linux/netdev_features.h @@ -93,7 +93,7 @@ enum { /* * Add your fresh new feature above and remember to update - * netdev_features_strings[] in net/core/ethtool.c and maybe + * netdev_features_strings[] in net/ethtool/common.c and maybe * some feature mask #defines below. Please also describe it * in Documentation/networking/netdev-features.rst. */ diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h index cfef6b0..67aa713 100644 --- a/include/uapi/linux/ethtool.h +++ b/include/uapi/linux/ethtool.h @@ -233,7 +233,7 @@ enum tunable_id { ETHTOOL_PFC_PREVENTION_TOUT, /* timeout in msecs */ /* * Add your fresh new tunable attribute above and remember to update - * tunable_strings[] in net/core/ethtool.c + * tunable_strings[] in net/ethtool/common.c */ __ETHTOOL_TUNABLE_COUNT, }; @@ -297,7 +297,7 @@ enum phy_tunable_id { ETHTOOL_PHY_EDPD, /* * Add your fresh new phy tunable attribute above and remember to update - * phy_tunable_strings[] in net/core/ethtool.c + * phy_tunable_strings[] in net/ethtool/common.c */ __ETHTOOL_PHY_TUNABLE_COUNT, }; -- 2.8.1

2 1