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Tsirkin" Cc: "virtualization@lists.linux-foundation.org" , Halil Pasic , =?UTF-8?q?Eugenio=20P=C3=A9rez?= , Stephen Rothwell , Linux Next Mailing List , kvm list , Cornelia Huck , Christian Borntraeger , "linux-kernel@vger.kernel.org" Subject: [PATCH 2/6] tools/virtio: Add --batch=random option Date: Sun, 29 Mar 2020 13:33:55 +0200 Message-Id: <20200329113359.30960-3-eperezma@redhat.com> In-Reply-To: <20200329113359.30960-1-eperezma@redhat.com> References: <20200329113359.30960-1-eperezma@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Content-Transfer-Encoding: quoted-printable Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org So we can test with non-deterministic batches in flight. Signed-off-by: Eugenio P=C3=A9rez --- tools/virtio/virtio_test.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/tools/virtio/virtio_test.c b/tools/virtio/virtio_test.c index c30de9088f3c..b0dd73db5cbf 100644 --- a/tools/virtio/virtio_test.c +++ b/tools/virtio/virtio_test.c @@ -19,6 +19,8 @@ #include #include "../../drivers/vhost/test.h" =20 +#define RANDOM_BATCH -1 + /* Unused */ void *__kmalloc_fake, *__kfree_ignore_start, *__kfree_ignore_end; =20 @@ -161,6 +163,7 @@ static void run_test(struct vdev_info *dev, struct vq= _info *vq, int r, test =3D 1; unsigned len; long long spurious =3D 0; + const bool random_batch =3D batch =3D=3D RANDOM_BATCH; r =3D ioctl(dev->control, VHOST_TEST_RUN, &test); assert(r >=3D 0); for (;;) { @@ -168,6 +171,10 @@ static void run_test(struct vdev_info *dev, struct v= q_info *vq, completed_before =3D completed; started_before =3D started; do { + const bool reset =3D reset_n && completed > next_reset; + if (random_batch) + batch =3D (random() % vq->vring.num) + 1; + while (started < bufs && (started - completed) < batch) { sg_init_one(&sl, dev->buf, dev->buf_size); @@ -275,7 +282,7 @@ static void help(void) " [--no-event-idx]" " [--no-virtio-1]" " [--delayed-interrupt]" - " [--batch=3DN]" + " [--batch=3Drandom/N]" "\n"); } =20 @@ -312,9 +319,13 @@ int main(int argc, char **argv) delayed =3D true; break; case 'b': - batch =3D strtol(optarg, NULL, 10); - assert(batch > 0); - assert(batch < (long)INT_MAX + 1); + if (0 =3D=3D strcmp(optarg, "random")) { + batch =3D RANDOM_BATCH; + } else { + batch =3D strtol(optarg, NULL, 10); + assert(batch > 0); + assert(batch < (long)INT_MAX + 1); + } break; default: assert(0); --=20 2.18.1