Il 16/09/2014 09:16, Fam Zheng ha scritto:
> On Mon, 09/15 12:17, Paolo Bonzini wrote:
>> Il 15/09/2014 07:23, Fam Zheng ha scritto:
>>> SCSIRequest *sreq;
>>> size_t resp_size;
>>> enum SCSIXferMode mode;
>>> -QEMUIOVector resp_iov;
>>> union {
>>> VirtIOSCSICmdRes
On Mon, 09/15 12:17, Paolo Bonzini wrote:
> Il 15/09/2014 07:23, Fam Zheng ha scritto:
> > SCSIRequest *sreq;
> > size_t resp_size;
> > enum SCSIXferMode mode;
> > -QEMUIOVector resp_iov;
> > union {
> > VirtIOSCSICmdResp cmd;
> > VirtIOSCSICtrlTMFResp
Il 15/09/2014 07:23, Fam Zheng ha scritto:
> SCSIRequest *sreq;
> size_t resp_size;
> enum SCSIXferMode mode;
> -QEMUIOVector resp_iov;
> union {
> VirtIOSCSICmdResp cmd;
> VirtIOSCSICtrlTMFResp tmf;
> @@ -68,23 +75,27 @@ static inline SCSIDevice
> *vi
The VirtQueueElement is a very big structure (>48k!), since it will be
initialzed by virtqueue_pop, we can save the expensive zeroing here.
This saves a few microseconds per request in my test:
[fio-test] rw bs iodepthjobs bw iops
latency
