Re: port-amd64/57266: Poor disk performance on VirtualBox vioscsi0 and NetBSD 10.0_BETA

[Jaromír Doleček <jaromir.dolecek%gmail.com@localhost>]

The following reply was made to PR port-amd64/57266; it has been noted by GNATS.

From: =?UTF-8?B?SmFyb23DrXIgRG9sZcSNZWs=?= <jaromir.dolecek%gmail.com@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: port-amd64-maintainer%netbsd.org@localhost, gnats-admin%netbsd.org@localhost, 
	netbsd-bugs%netbsd.org@localhost
Subject: Re: port-amd64/57266: Poor disk performance on VirtualBox vioscsi0
 and NetBSD 10.0_BETA
Date: Sun, 12 Mar 2023 08:28:00 +0100

 Can you please post the full dmesg of the virtual machine?
 
 Can you also confirm what is the block size you used for the
 filesystem on the sd device?
 
 It's pretty odd that the incoming request from the SCSI subsystem
 passes a 128k I/O, that shouldn't really happen.
 The SCSI subsystem should enforce 64k minphys, but that might be done
 only for raw I/O, not block I/O as used for the actual filesystem
 operations with a buffer cache.
 
 Jaromir