2018年11月29日 星期四

測試P2P及GPU,QPI Early Snoop的設定影響

在Intel Haswell這一代,QPI下有個Early Snoop功能。這個early snoop功能在於HPC做cache分派時,能透過early snoop功能獲得job load balance效果。但用於GPU上,因為需要CPU及PCIe的頻寬,因此需要將此給關閉。
這是Intel對early snoop的解釋


進入測試重點:
首先,先測試Early Snoop開啟/Auto狀態下的數值。此次我是採用nVidia K40m來測試。附帶一提的是,nVidia不支援跨QPI/UPI(SKL平台)的P2P。並且P2P的任何結果僅供參考 (reference only).


Early Snoop開啟下,P2P獲得的值:單向為 5.13, 7.96 GB/s  雙向(Bidirection)為 6.66, 6.95 GB/s 

Early Snoop關閉下,P2P獲得的值:單向為 9.30, 9.31 GB/s  雙向(Bidirection)為 18.34, 17.98 GB/s 

因此,如果使用Haswell平台應用在GPU P2P的環境,例如AI, Deep Learning, Tensorflow等,可以把early snoop給關閉獲取最大傳輸頻寬。

2018年8月2日 星期四

啟動phpmyadmin發生 mbstring extension is missing. Please check your PHP configuration 錯誤

出現此錯誤是在於phpmyadmin需要mbstring的函數庫支援,而系統未安裝。
解決此問題可以透過
   #yum install php-mbstring 
解決

2018年7月5日 星期四

VMware ESXi 6.7 不再支援的磁碟陣列及HBA卡

最近拿BCM/Avago 8708EM2 卡測試,發現不少問題。有使用VMware 6.7的請注意這個 KB

ESXi 6.7 不再支援及的磁碟陣列/HBA控制器:

This table lists the devices that are deprecated and no longer supported in ESXi 6.7:
PartnerDriverDevice IDsDevice Name 
Fujitsu Siemensmegaraid_sas1000:0060:1734:10f9Raid 5/6 based on LSI MegaRAID
IBMmegaraid_sas1000:0060:1014:0363IBM ServeRAID-MR10k SAS/SATA Controller
1000:0060:1014:0366LSI1078IR
1000:0060:1014:0395ServeRAID-AR10is SAS/SATA Controller
Intelmegaraid_sas1000:0060:8086:34e4Integrated Intel RAID Controller SROMBSASBN
1000:0060:8086:1013Intel RAID Controller SRCSASBB8I
1000:0060:8086:1006Intel RAID Controller SRCSASJV
1000:0060:8086:1021Intel RAID Controller SRCSASLS4I
1000:0060:8086:100aIntel RAID Controller SRCSASRB
1000:0060:8086:1010Intel RAID Controller SRCSATAWB
1000:0060:8086:34ccIntel RAID Controller SROMBSASFC
1000:0060:8086:34cdIntel RAID Controller SROMBSASFC
1000:0060:8086:3505Intel RAID Controller SROMBSASMP2
1000:0060:8086:3508Intel RAID Controller SROMBSASMR
LSImegaraid_sas1000:0060:1028:1f0aDELL PERC 6/E Adapter RAID Controller
1000:0060:1028:1f0bDELL PERC 6/i Adapter RAID Controller
1000:0060:1014:0364IBM ServeRAID-MR10i SAS/SATA Controller
1000:0060:1014:03a2IBM ServeRAID-MR10i SAS/SATA Controller
1000:0060:1014:03acIBM ServeRAID-MR10ie (CLOv) Controller
1000:0060:1014:0379IBM ServeRAID-MR10M SAS/SATA Controller
1000:0060:1014:0000IBM SystemX MegaRAID SAS 8708EM2
1000:0060:1014:0365IBM SystemX MegaRAID SAS 8884E
1000:0060:1000:1013LSI Logic MegaRAID SAS 8700EM2
1000:0060:1000:1012LSI Logic MegaRAID SAS 8704ELP
1000:0060:1000:1021LSI Logic MegaRAID SAS 8704EM2
1000:0060:1000:100fLSI Logic MegaRAID SAS 8708E
1000:0060:1000:100aLSI Logic MegaRAID SAS 8708ELP
1000:0060:1000:1022LSI Logic MegaRAID SAS 8708EM2-256
1000:0060:1000:1019LSI Logic MegaRAID SAS 8744ELP
1000:0060:1000:1017LSI Logic MegaRAID SAS 8744EM2
1000:0060:1000:1015LSI Logic MegaRAID SAS 8780EM2
1000:0060:1000:1014LSI Logic MegaRAID SAS 8800EM2
1000:0060:1000:101aLSI Logic MegaRAID SAS 8844ELP
1000:0060:1000:1018LSI Logic MegaRAID SAS 8844EM2
1000:0060:1000:100eLSI Logic MegaRAID SAS 8884E
1000:0060:1000:1006LSI Logic MegaRAID SAS 8888ELP
1000:0060:15d9:c080LSI Logic MegaRAID SAS PCI Express ROMB
1000:0060:1033:835aLSI Logic MegaRAID SAS PCI Express ROMB
1000:0060:1054:3019LSI Logic MegaRAID SAS PCI Express ROMB
1000:0060:1033:836aLSI Logic MegaRAID SAS PCI Express ROMB
1000:0060:0000:0000LSI Logic MegaRAID SAS1078R
1000:0060:1000:1011LSI Logic MegaRAID SATA 350-4ELP
1000:0060:1000:1010LSI Logic MegaRAID SATA 350-8ELP
1000:0060:1000:1016LSI MegaRAID SAS 8880EM2
1000:0060:18a1:0003LSI MegaRAID SAS PCI Express ROMB
1000:0060:19e5:2015LSI MegaRAID SAS PCI Express ROMB
1000:0060:19e5:2014LSI MegaRAID SAS PCI Express ROMB
1000:0060:19e5:2013LSI MegaRAID SAS PCI Express ROMB
1000:0060:19e5:2012LSI MegaRAID SAS PCI Express ROMB
1000:0060:19e5:2011LSI MegaRAID SAS PCI Express ROMB
1000:0060:19e5:2010LSI MegaRAID SAS PCI Express ROMB
1000:0060:19e5:2006LSI MegaRAID SAS PCI Express ROMB
1000:0060:19e5:2005LSI MegaRAID SAS PCI Express ROMB
1000:0060:1fca:2163LSI MegaRAID SAS PCI Express ROMB
1000:0060:19e5:2003LSI MegaRAID SAS PCI Express ROMB
1000:0060:19e5:2002LSI MegaRAID SAS PCI Express ROMB
1000:0060:19e5:2001LSI MegaRAID SAS PCI Express ROMB
1000:0060:19e5:2017LSI MegaRAID SAS PCI Express ROMB
1000:0060:17aa:6b7cLSI MegaRAID SAS PCI Express ROMB
1000:0060:1458:1000LSI MegaRAID SAS PCI Express ROMB
1000:0060:1170:0036LSI MegaRAID SAS PCI Express ROMB
1000:0060:1170:0034LSI MegaRAID SAS PCI Express ROMB
1000:0060:1170:002fLSI MegaRAID SAS PCI Express ROMB
1000:0060:1043:824dLSI MegaRAID SAS PCI Express ROMB
1000:0060:19e5:2019LSI MegaRAID SAS PCI Express ROMB
1000:0060:19e5:201aLSI MegaRAID SAS PCI Express ROMB
1000:0060:19e5:2018LSI MegaRAID SAS PCI Express ROMB
1000:0060:19e5:2016LSI MegaRAID SAS PCI Express ROMB
1000:0060:1b0a:0014LSI MegaRAID SAS PCI Express ROMB
1000:0060:19e5:2004LSI MegaRAID SAS PCI Express ROMB
1000:0060:0000:0000MegaRAID 1078 RAID Controller
1000:0060:1734:1102Raid 5/6 based on LSI MegaRAID
1000:0060:1734:114bRaid 5/6 based on LSI MegaRAID
NECmegaraid_sas1000:0060:0000:0000NE3008-201
Compaqcciss0e11:b178:0e11:4083Smart Array 5312
0e11:b178:0e11:4082Smart Array 532
DELLsata_nv10de:037f:0000:0000nVidia MCP55 SATA Dell
NVIDIAsata_nv10de:037e:0000:0000MCP55 SATA Controller
10de:037f:0000:0000MCP55 SATA Controller
Sun Microsystemssata_nv10de:037f:0000:0000Nvidia MCP55 SATA Controller
10de:037f:108e:534bNvidia MCP55 SATA Controller

2018年5月15日 星期二

X722 SoC 網路晶片在更新BIOS後會不見

Supermicro X11 主機板或系統在更新BIOS後 (2.0b後),會發現之前的X722本來是可以偵測的。透過Intel Diags或是LanConfig工具都無法抓取到網路裝置。在OS下亦無法卡到該裝置。

用戶可以透過以下方式修復,此問題亦刊登於 FAQ#27959 上。