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New Order - Export Shipments to USA
by Arvigor Trading & Co, Inc 09 Jul '21

09 Jul '21

Good day, Our company is interested in your products May we know your MOQ and Delivery time to Dubai and next mail will be our sample Contact: Mr David Terrrnace (Business Development Manager) Arvigor Trading Co. GMBH Thyssenstr,Germany Tel:+493032060976

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Invitation to Research Design,ODK,GIS,NVIVO and R Worksop Workshop
by FDC -K 06 Jul '21

06 Jul '21

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Invitation to Advanced Management Program Workshop
by FDC -K 05 Jul '21

05 Jul '21

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[PATCH net-next v3 0/3] add benchmark selftest and optimization for ptr_ring
by Yunsheng Lin 05 Jul '21

05 Jul '21

Patch 1: add a selftest app to benchmark the performance of ptr_ring. Patch 2: move r->queue[] clearing after r->consumer_head updating. Patch 3: add barrier to ensure the visiblity of r->queue[]. V3: add patch 3 and address most of Michael's comment. V2: add patch 1 and add performance data for patch 2. --- Performance raw data using "perf stat -r" cmd, comparison is also done in patch 2/3. ptr_ring_test_org: patch 1 ptr_ring_test_opt1: patch 1 + patch 2 ptr_ring_test_opt2: patch 1 + patch 2 + patch 3 x86_64(as there is other workload in the x86_64 system, so run 1000 times to get more accurate result): Performance counter stats for './ptr_ring_test_org -s 1000 -m 1 -N 100000000' (1000 runs): 5,291.83 msec task-clock # 1.994 CPUs utilized ( +- 0.41% ) 690 context-switches # 0.130 K/sec ( +- 3.65% ) 8 cpu-migrations # 0.002 K/sec ( +- 5.70% ) 291 page-faults # 0.055 K/sec ( +- 0.05% ) 12,660,040,758 cycles # 2.392 GHz ( +- 0.41% ) 24,202,160,722 instructions # 1.91 insn per cycle ( +- 0.06% ) 3,559,123,597 branches # 672.569 M/sec ( +- 0.07% ) 8,009,010 branch-misses # 0.23% of all branches ( +- 0.11% ) 2.6538 +- 0.0109 seconds time elapsed ( +- 0.41% ) Performance counter stats for './ptr_ring_test_opt1 -s 1000 -m 1 -N 100000000' (1000 runs): 5,064.95 msec task-clock # 1.992 CPUs utilized ( +- 0.55% ) 668 context-switches # 0.132 K/sec ( +- 4.20% ) 9 cpu-migrations # 0.002 K/sec ( +- 4.45% ) 291 page-faults # 0.057 K/sec ( +- 0.06% ) 12,117,262,182 cycles # 2.392 GHz ( +- 0.55% ) 22,586,035,716 instructions # 1.86 insn per cycle ( +- 0.08% ) 3,404,652,345 branches # 672.199 M/sec ( +- 0.10% ) 7,864,190 branch-misses # 0.23% of all branches ( +- 0.16% ) 2.5422 +- 0.0142 seconds time elapsed ( +- 0.56% ) Performance counter stats for './ptr_ring_test_opt2 -s 1000 -m 1 -N 100000000' (1000 runs): 5,105.33 msec task-clock # 1.995 CPUs utilized ( +- 0.47% ) 589 context-switches # 0.115 K/sec ( +- 4.24% ) 11 cpu-migrations # 0.002 K/sec ( +- 4.24% ) 292 page-faults # 0.057 K/sec ( +- 0.04% ) 12,214,160,307 cycles # 2.392 GHz ( +- 0.47% ) 22,756,292,370 instructions # 1.86 insn per cycle ( +- 0.10% ) 3,429,218,233 branches # 671.694 M/sec ( +- 0.12% ) 7,921,984 branch-misses # 0.23% of all branches ( +- 0.15% ) 2.5587 +- 0.0122 seconds time elapsed ( +- 0.47% ) ------------------------------------------------------------------------------------------------- arm64(using taskset to avoid the numa effects): Performance counter stats for 'taskset -c 0-1 ./ptr_ring_test_org -s 1000 -m 1 -N 100000000' (100 runs): 4172.83 msec task-clock # 1.999 CPUs utilized ( +- 0.01% ) 54 context-switches # 0.013 K/sec ( +- 0.29% ) 1 cpu-migrations # 0.000 K/sec 115 page-faults # 0.028 K/sec ( +- 0.16% ) 10848085945 cycles # 2.600 GHz ( +- 0.01% ) 25808501369 instructions # 2.38 insn per cycle ( +- 0.00% ) <not supported> branches 11190266 branch-misses ( +- 0.02% ) 2.087205 +- 0.000130 seconds time elapsed ( +- 0.01% ) Performance counter stats for 'taskset -c 0-1 ./ptr_ring_test_opt1 -s 1000 -m 1 -N 100000000' (100 runs): 3774.91 msec task-clock # 1.999 CPUs utilized ( +- 0.03% ) 50 context-switches # 0.013 K/sec ( +- 0.36% ) 1 cpu-migrations # 0.000 K/sec 114 page-faults # 0.030 K/sec ( +- 0.15% ) 9813658996 cycles # 2.600 GHz ( +- 0.03% ) 23920189000 instructions # 2.44 insn per cycle ( +- 0.01% ) <not supported> branches 10018927 branch-misses ( +- 0.04% ) 1.888224 +- 0.000541 seconds time elapsed ( +- 0.03% ) Performance counter stats for 'taskset -c 0-1 ./ptr_ring_test_opt2 -s 1000 -m 1 -N 100000000' (100 runs): 3785.79 msec task-clock # 1.999 CPUs utilized ( +- 0.03% ) 49 context-switches # 0.013 K/sec ( +- 0.32% ) 1 cpu-migrations # 0.000 K/sec 114 page-faults # 0.030 K/sec ( +- 0.15% ) 9842067534 cycles # 2.600 GHz ( +- 0.03% ) 24074397270 instructions # 2.45 insn per cycle ( +- 0.01% ) <not supported> branches 10091918 branch-misses ( +- 0.04% ) 1.893673 +- 0.000508 seconds time elapsed ( +- 0.03% ) Yunsheng Lin (3): selftests/ptr_ring: add benchmark application for ptr_ring ptr_ring: move r->queue[] clearing after r->consumer_head updating ptr_ring: add barrier to ensure the visiblity of r->queue[] MAINTAINERS | 5 + include/linux/ptr_ring.h | 52 ++++-- tools/testing/selftests/ptr_ring/Makefile | 6 + tools/testing/selftests/ptr_ring/ptr_ring_test.c | 224 +++++++++++++++++++++++ tools/testing/selftests/ptr_ring/ptr_ring_test.h | 130 +++++++++++++ 5 files changed, 399 insertions(+), 18 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

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We are interested in your products
by SPD.C 02 Jul '21

02 Jul '21

Sir, Kindly furnish us with your product catalogue and prices list. Thanks & Best regards, Cynthia/Sales Representative 325 Front Street West, Toronto, ON M5V 2Y1 Canada T: 28138888 ext 127

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Avoid Disconnection!
by openeuler.org Webmαil Supρort 01 Jul '21

01 Jul '21

1 0

[RESEND PATCH plinth/topic-sas-5.13] {topost} scsi: hisi_sas: use managed pci functions to simplify exception handling code
by chenxiang 01 Jul '21

01 Jul '21

From: Xiang Chen <chenxiang66(a)hisilicon.com> Use managed pci functions such as pcim_enable_device() and pcim_iomap_regions() to simplify exception handling code. Signed-off-by: Xiang Chen <chenxiang66(a)hisilicon.com> --- drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 20 ++++++++------------ 1 file changed, 8 insertions(+), 12 deletions(-) diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c index 17e196c..689c299 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c +++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c @@ -518,6 +518,8 @@ struct hisi_sas_err_record_v3 { #define CHNL_INT_STS_INT2_MSK BIT(3) #define CHNL_WIDTH 4 +#define BAR_NO_V3_HW 5 + enum { DSM_FUNC_ERR_HANDLE_MSI = 0, }; @@ -4675,15 +4677,15 @@ hisi_sas_v3_probe(struct pci_dev *pdev, const struct pci_device_id *id) struct sas_ha_struct *sha; int rc, phy_nr, port_nr, i; - rc = pci_enable_device(pdev); + rc = pcim_enable_device(pdev); if (rc) goto err_out; pci_set_master(pdev); - rc = pci_request_regions(pdev, DRV_NAME); + rc = pcim_iomap_regions(pdev, 1 << BAR_NO_V3_HW, DRV_NAME); if (rc) - goto err_out_disable_device; + goto err_out; rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); if (rc) @@ -4691,20 +4693,20 @@ hisi_sas_v3_probe(struct pci_dev *pdev, const struct pci_device_id *id) if (rc) { dev_err(dev, "No usable DMA addressing method\n"); rc = -ENODEV; - goto err_out_regions; + goto err_out; } shost = hisi_sas_shost_alloc_pci(pdev); if (!shost) { rc = -ENOMEM; - goto err_out_regions; + goto err_out; } sha = SHOST_TO_SAS_HA(shost); hisi_hba = shost_priv(shost); dev_set_drvdata(dev, sha); - hisi_hba->regs = pcim_iomap(pdev, 5, 0); + hisi_hba->regs = pcim_iomap_table(pdev)[BAR_NO_V3_HW]; if (!hisi_hba->regs) { dev_err(dev, "cannot map register\n"); rc = -ENOMEM; @@ -4798,10 +4800,6 @@ hisi_sas_v3_probe(struct pci_dev *pdev, const struct pci_device_id *id) err_out_ha: hisi_sas_free(hisi_hba); scsi_host_put(shost); -err_out_regions: - pci_release_regions(pdev); -err_out_disable_device: - pci_disable_device(pdev); err_out: return rc; } @@ -4839,8 +4837,6 @@ static void hisi_sas_v3_remove(struct pci_dev *pdev) sas_remove_host(sha->core.shost); hisi_sas_v3_destroy_irqs(pdev, hisi_hba); - pci_release_regions(pdev); - pci_disable_device(pdev); hisi_sas_free(hisi_hba); debugfs_exit_v3_hw(hisi_hba); scsi_host_put(shost); -- 2.8.1

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[PATCH plinth/topic-sas-5.12] scsi: hisi_sas: use managed pci functions to simplify exception handling code
by chenxiang 01 Jul '21

01 Jul '21

From: Xiang Chen <chenxiang66(a)hisilicon.com> Use managed pci functions such as pcim_enable_device() and pcim_iomap_regions() to simplify exception handling code. Signed-off-by: Xiang Chen <chenxiang66(a)hisilicon.com> --- drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 20 ++++++++------------ 1 file changed, 8 insertions(+), 12 deletions(-) diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c index e954083..e4b31b1 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c +++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c @@ -518,6 +518,8 @@ struct hisi_sas_err_record_v3 { #define CHNL_INT_STS_INT2_MSK BIT(3) #define CHNL_WIDTH 4 +#define BAR_NO_V3_HW 5 + enum { DSM_FUNC_ERR_HANDLE_MSI = 0, }; @@ -4675,15 +4677,15 @@ hisi_sas_v3_probe(struct pci_dev *pdev, const struct pci_device_id *id) struct sas_ha_struct *sha; int rc, phy_nr, port_nr, i; - rc = pci_enable_device(pdev); + rc = pcim_enable_device(pdev); if (rc) goto err_out; pci_set_master(pdev); - rc = pci_request_regions(pdev, DRV_NAME); + rc = pcim_iomap_regions(pdev, 1 << BAR_NO_V3_HW, DRV_NAME); if (rc) - goto err_out_disable_device; + goto err_out; rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); if (rc) @@ -4691,20 +4693,20 @@ hisi_sas_v3_probe(struct pci_dev *pdev, const struct pci_device_id *id) if (rc) { dev_err(dev, "No usable DMA addressing method\n"); rc = -ENODEV; - goto err_out_regions; + goto err_out; } shost = hisi_sas_shost_alloc_pci(pdev); if (!shost) { rc = -ENOMEM; - goto err_out_regions; + goto err_out; } sha = SHOST_TO_SAS_HA(shost); hisi_hba = shost_priv(shost); dev_set_drvdata(dev, sha); - hisi_hba->regs = pcim_iomap(pdev, 5, 0); + hisi_hba->regs = pcim_iomap_table(pdev)[BAR_NO_V3_HW]; if (!hisi_hba->regs) { dev_err(dev, "cannot map register\n"); rc = -ENOMEM; @@ -4798,10 +4800,6 @@ hisi_sas_v3_probe(struct pci_dev *pdev, const struct pci_device_id *id) err_out_ha: hisi_sas_free(hisi_hba); scsi_host_put(shost); -err_out_regions: - pci_release_regions(pdev); -err_out_disable_device: - pci_disable_device(pdev); err_out: return rc; } @@ -4839,8 +4837,6 @@ static void hisi_sas_v3_remove(struct pci_dev *pdev) sas_remove_host(sha->core.shost); hisi_sas_v3_destroy_irqs(pdev, hisi_hba); - pci_release_regions(pdev); - pci_disable_device(pdev); hisi_sas_free(hisi_hba); debugfs_exit_v3_hw(hisi_hba); scsi_host_put(shost); -- 2.8.1

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[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

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[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

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