On 9/10/23 14:48, Richard W.M. Jones wrote:
RISCV_CPU(cs) uses a checked cast. When QOM cast debugging is enabled
this adds about 5% total overhead when emulating RV64 on x86-64 host.
Using a RISC-V guest with 16 vCPUs, 16 GB of guest RAM, virtio-blk
disk. The guest has a copy of the qemu source tree. The test
involves compiling the qemu source tree with 'make clean; time make -j16'.
Before making this change the compile step took 449 & 447 seconds over
two consecutive runs.
After making this change: 428 & 421 seconds.
The saving is over 5%.
Thanks: Paolo Bonzini
Thanks: Philippe Mathieu-Daudé
Signed-off-by: Richard W.M. Jones <rjo...@redhat.com>
---
target/riscv/cpu_helper.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
Reviewed-by: Philippe Mathieu-Daudé <phi...@linaro.org>
