2022-01-13 9:41 GMT+08:00, Thinh Nguyen <Thinh.Nguyen@xxxxxxxxxxxx>: > 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) right. > BR, > Thinh >
