On 4/25/2017 11:25 AM, Gilad Ben-Yossef wrote:
> The tcrypt AEAD cycles speed tests disables irqs during the test, which is
> broken at the very least since commit
> '1425d2d17f7309c6 ("crypto: tcrypt - Fix AEAD speed tests")'
> adds a wait for completion as part of the test and probably since
> switching to the new AEAD API.
>
> While the result of taking a cycle count diff may not mean much on SMP
> systems if the task migrates, it's good enough for tcrypt being the quick
> & dirty dev tool it is. It's also what all the other (i.e. hash) cycle
> speed tests do.
>
> Signed-off-by: Gilad Ben-Yossef <gi...@benyossef.com>
> Reported-by: Ofir Drang <ofir.dr...@arm.com>
Reviewed-by: Horia Geantă <horia.gea...@nxp.com>
I've also noticed this in CAAM accelerator - spin_unlock_bh() called
from caam_jr_enqueue() complains due to disabled interrupts:
WARNING: CPU: 4 PID: 2585 at kernel/softirq.c:161
.__local_bh_enable_ip+0x70/0xcc
Thanks,
Horia
> ---
> crypto/tcrypt.c | 4 ----
> 1 file changed, 4 deletions(-)
>
> diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c
> index 9a11f3c..0dd6a43 100644
> --- a/crypto/tcrypt.c
> +++ b/crypto/tcrypt.c
> @@ -138,8 +138,6 @@ static int test_aead_cycles(struct aead_request *req, int
> enc, int blen)
> int ret = 0;
> int i;
>
> - local_irq_disable();
> -
> /* Warm-up run. */
> for (i = 0; i < 4; i++) {
> if (enc)
> @@ -169,8 +167,6 @@ static int test_aead_cycles(struct aead_request *req, int
> enc, int blen)
> }
>
> out:
> - local_irq_enable();
> -
> if (ret == 0)
> printk("1 operation in %lu cycles (%d bytes)\n",
> (cycles + 4) / 8, blen);
>
