From: Pancho.Jones@proton.me   
      
   On 22/02/2024 10:00, Pancho wrote:   
   > On 22/02/2024 00:17, Andy Burns wrote:   
   >> Pancho wrote:   
   >>   
   >>> I posted some stats back in December ( hdparm -Ttv), on the opi5 the   
   >>> nvme was only giving 186 MB/s seq read, not that much more than a   
   >>> USB3 SSD at 137 MB/s.   
   >>>   
   >>> I think, like the oPi5, the rPi5 also has the handicap that it only   
   >>> allocates PCIe 3.0 x 1 to nvme.   
   >>>   
   >>> So yes, nvme is faster in benchmarks, but nowhere near the 3000MB/s   
   >>> you might see on a PC.   
   >>   
   >> I think Jeff Geerling saw 900MB/s ?   
   >   
   > Remember, I'm testing nvme on an Orange Pi 5 not a Raspberry Pi 5, but,   
   > I feel quite inadequate. However, it is what I get.   
   >   
   > Here are the results from druck's script:   
   >   
   >    READ: bw=200MiB/s (209MB/s), 200MiB/s-200MiB/s (209MB/s-209MB/s),   
   > io=6000MiB (6291MB), run=30060-30060msec   
   >    WRITE: bw=199MiB/s (209MB/s), 199MiB/s-199MiB/s (209MB/s-209MB/s),   
   > io=6000MiB (6291MB), run=30085-30085msec   
   >     READ: bw=36.0MiB/s (37.8MB/s), 36.0MiB/s-36.0MiB/s   
   > (37.8MB/s-37.8MB/s), io=1081MiB (1133MB), run=30001-30001msec   
   >     READ: bw=48.1MiB/s (50.4MB/s), 48.1MiB/s-48.1MiB/s   
   > (50.4MB/s-50.4MB/s), io=1443MiB (1513MB), run=30001-30001msec   
   >   
   >   
   > Maybe my result is so bad because I'm only using a KingSpec nvme drive?   
   > It's supposed to do 3500MB/s, but I've never tested it in anything that   
   > could handle that.   
   >   
   > I'm not going to use a top range drive on a Pi. The Orange Pi isn't   
   > doing anything else, isn't busy.   
      
   I was curious, so I did a bit of digging, it appears my nvme drive is   
   running as PCIe gen 1. The oPi5 should be gen 3, The nvme drive should   
   be gen 3.   
      
   $ lspci | grep -i nvme   
      
   0004:41:00.0 Non-Volatile memory controller: MAXIO Technology (Hangzhou)   
   Ltd. NVMe SSD Controller MAP1202 (rev 01)   
      
   $ sudo lspci -vv -s  0004:41:00.0 | grep LnkSta   
      
   LnkSta: Speed 2.5GT/s (downgraded), Width x1 (downgraded)   
   LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete   
   EqualizationPhase1-   
      
   Which, from my poor understanding, implies a theoretical top speed of   
   250MB/s for 1 lane. Which is consistent with my real world tests.   
      
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