RE: PING: [PATCH v4 0/5] virtio-crypto: Improve performance

Wed, 04 May 2022 20:14:57 -0700 


> -----Original Message-----
> From: zhenwei pi [mailto:[email protected]]
> Sent: Thursday, May 5, 2022 10:35 AM
> To: Gonglei (Arei) <[email protected]>; [email protected];
> [email protected]
> Cc: [email protected]; [email protected];
> [email protected]; [email protected];
> [email protected]; [email protected]
> Subject: PING: [PATCH v4 0/5] virtio-crypto: Improve performance
> 
> Hi, Lei
> 
> Jason replied in another patch:
> Still hundreds of lines of changes, I'd leave this change to other 
> maintainers to
> decide.
> 
> Quite frankly, the virtio crypto driver changed only a few in the past, and 
> the
> performance of control queue is not good enough. I am in doubt about that this
> driver is not used widely. So I'd like to rework a lot, it would be best to 
> complete
> this work in 5.18 window.
> 
> This gets different point with Jason. I would appreciate it if you could give 
> me
> any hint.
> 

This is already in my todo list.

Regards,
-Gonglei

> On 4/24/22 18:41, zhenwei pi wrote:
> > Hi, Lei
> > I'd like to move helper and callback functions(Eg, virtcrypto_clear_request
> >   and virtcrypto_ctrlq_callback) from xx_core.c to xx_common.c, then
> > the xx_core.c supports:
> >    - probe/remove/irq affinity seting for a virtio device
> >    - basic virtio related operations
> >
> > xx_common.c supports:
> >    - common helpers/functions for algos
> >
> > Do you have any suggestion about this?
> >
> > v3 -> v4:
> >   - Don't create new file virtio_common.c, the new functions are added
> >     into virtio_crypto_core.c
> >   - Split the first patch into two parts:
> >       1, change code style,
> >       2, use private buffer instead of shared buffer
> >   - Remove relevant change.
> >   - Other minor changes.
> >
> > v2 -> v3:
> >   - Jason suggested that spliting the first patch into two part:
> >       1, using private buffer
> >       2, remove the busy polling
> >     Rework as Jason's suggestion, this makes the smaller change in
> >     each one and clear.
> >
> > v1 -> v2:
> >   - Use kfree instead of kfree_sensitive for insensitive buffer.
> >   - Several coding style fix.
> >   - Use memory from current node, instead of memory close to device
> >   - Add more message in commit, also explain why removing per-device
> >     request buffer.
> >   - Add necessary comment in code to explain why using kzalloc to
> >     allocate struct virtio_crypto_ctrl_request.
> >
> > v1:
> > The main point of this series is to improve the performance for virtio
> > crypto:
> > - Use wait mechanism instead of busy polling for ctrl queue, this
> >    reduces CPU and lock racing, it's possiable to create/destroy session
> >    parallelly, QPS increases from ~40K/s to ~200K/s.
> > - Enable retry on crypto engine to improve performance for data queue,
> >    this allows the larger depth instead of 1.
> > - Fix dst data length in akcipher service.
> > - Other style fix.
> >
> > lei he (2):
> >    virtio-crypto: adjust dst_len at ops callback
> >    virtio-crypto: enable retry for virtio-crypto-dev
> >
> > zhenwei pi (3):
> >    virtio-crypto: change code style
> >    virtio-crypto: use private buffer for control request
> >    virtio-crypto: wait ctrl queue instead of busy polling
> >
> >   .../virtio/virtio_crypto_akcipher_algs.c      |  83 ++++++-----
> >   drivers/crypto/virtio/virtio_crypto_common.h  |  21 ++-
> >   drivers/crypto/virtio/virtio_crypto_core.c    |  55 ++++++-
> >   .../virtio/virtio_crypto_skcipher_algs.c      | 140 ++++++++----------
> >   4 files changed, 180 insertions(+), 119 deletions(-)
> >
> 
> --
> zhenwei pi
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