youling 257 wrote: > 2021-12-31 15:02 GMT+08:00, Thinh Nguyen <Thinh.Nguyen@xxxxxxxxxxxx>: >> youling 257 wrote: >>> 2021-12-31 11:46 GMT+08:00, Thinh Nguyen <Thinh.Nguyen@xxxxxxxxxxxx>: >>>> Hi, >>>> >>>> youling 257 wrote: >>>>> test this patch, cat /sys/bus/usb/devices/4-1/speed, 10000 >>>>> [ 74.694284] usb 4-1: new SuperSpeed Plus Gen 2x1 USB device number >>>>> 2 using xhci_hcd >>>>> [ 74.750329] usb-storage 4-1:1.0: USB Mass Storage device detected >>>>> >>>>> but speed, pcie to usb3.2 gen2x2, WRITE: bw=642MiB/s (673MB/s), >>>>> 642MiB/s-642MiB/s (673MB/s-673MB/s), io=1000MiB (1049MB), >>>>> run=1557-1557msec >>>>> READ: bw=467MiB/s (490MB/s), 467MiB/s-467MiB/s (490MB/s-490MB/s), >>>>> io=1000MiB (1049MB), run=2140-2140msec >>>>> >>>>> the mainboard usb3.2 gen2x1, WRITE: bw=838MiB/s (878MB/s), >>>>> 838MiB/s-838MiB/s (878MB/s-878MB/s), io=1000MiB (1049MB), >>>>> run=1194-1194msec >>>>> READ: bw=753MiB/s (790MB/s), 753MiB/s-753MiB/s (790MB/s-790MB/s), >>>>> io=1000MiB (1049MB), run=1328-1328msec >>>>> >>>> >>>> Let's avoid top-post. >>>> >>>> Some comments: >>>> 1) Just because the host is capable of gen2x2, it doesn't mean it will >>>> run at gen2x2 speed. Your device can only operate up to gen2x1 speed, so >>>> that's the limit. The test speed for gen2x1 above is not unreasonable. >> >>> my device can only operate up to gen2x1 10gbps speed on window, only >>> 5gbps on linux kernel 5.16rc7. >> >> With the change I provided, you were able to run test at gen2x1, albeit >> slower than expect. (i.e. write speed at 673MB/s for ASmedia host must >> be SSP). The issue with device unable to operate at SSP is at least >> answered. >> >> If you're looking to find out why the performance is slow, confirm these >> items first: >> >> 1) Are you using the same application to test on Linux to compare with >> Windows? (Looks like you're using CrystalDiskMark for your Windows test) >> >> 2) If you're using the same application, are you using the same test >> parameters and version? >> >> 3) Is your device operating in BOT or UASP in Linux? UAS Protocol is > my kernel config #CONFIG_USB_UAS is not set. Ok. >> generally faster. Newer device generally uses UASP, and I assume yours >> is a newer device (check your enclosure). Make sure there's no quirk >> preventing the device operating in UASP. > CONFIG_USB_UAS=y > [ 524.630081] usb 4-1: new SuperSpeed Plus Gen 2x1 USB device number > 5 using xhci_hcd > [ 524.747496] scsi host9: uas > [ 524.757580] scsi 9:0:0:0: Direct-Access Realtek USB 3.2 Device > 1.00 PQ: 0 ANSI: 6 > Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 20000M/x2 > |__ Port 1: Dev 2, If 0, Class=Mass Storage, Driver=uas, 10000M > > windows fat32 speed, https://urldefense.com/v3/__https://imgur.com/a/eq9qhKj__;!!A4F2R9G_pg!OkYlXXf1Zw-EMemp22NTRgqOnOxlP-Xp95WYBJvguF9b4iyS4SX_y4Z5pAe_IaB7ZNtb$ > linux ext4 speed, https://urldefense.com/v3/__https://imgur.com/a/tUAskgV__;!!A4F2R9G_pg!OkYlXXf1Zw-EMemp22NTRgqOnOxlP-Xp95WYBJvguF9b4iyS4SX_y4Z5pAe_IcQVJqNn$ > I can't view the "windows" image, but it seems like it's running in high performance in Linux as UASP device now right? (I see ~1GB/s) BR, Thinh
