Hello, Is there any mechanism within QEMU for an emulated device to handle string IO instructions (e.g., insw) directly?
I have noticed that PIO transfers seem rather slow (~240 kb/s) when running QEMU on my computer, despite using a raw block device (SSD), aio=io_uring, and file.cache.direct=on. The attached patch improves the rate by about 50% for me, and I would appreciate feedback on whether this holds for others as well. Kind regards, Lev Kujawski Lev Kujawski (1): hw/ide/core: Accumulate PIO output within io_buffer prior to pwritev hw/ide/core.c | 62 ++++++++++++++++++++++++--------------- include/hw/ide/internal.h | 1 + 2 files changed, 39 insertions(+), 24 deletions(-) -- 2.34.1
