diff options
| author | Leandro Lupori | 2022-10-25 22:24:24 +0200 |
|---|---|---|
| committer | Daniel Henrique Barboza | 2022-10-28 18:15:23 +0200 |
| commit | eeaaefe9fa8b95a7ed39ee86257f3bf1af751804 (patch) | |
| tree | 68aae0fe616f09eb7060a4573a6069307bd34957 /docs | |
| parent | target/ppc: Add new PMC HFLAGS (diff) | |
| download | qemu-eeaaefe9fa8b95a7ed39ee86257f3bf1af751804.tar.gz qemu-eeaaefe9fa8b95a7ed39ee86257f3bf1af751804.tar.xz qemu-eeaaefe9fa8b95a7ed39ee86257f3bf1af751804.zip | |
target/ppc: Increment PMC5 with inline insns
Profiling QEMU during Fedora 35 for PPC64 boot revealed that
6.39% of total time was being spent in helper_insns_inc(), on a
POWER9 machine. To avoid calling this helper every time PMCs had
to be incremented, an inline implementation of PMC5 increment and
check for overflow was developed. This led to a reduction of
about 12% in Fedora's boot time.
Signed-off-by: Leandro Lupori <leandro.lupori@eldorado.org.br>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20221025202424.195984-4-leandro.lupori@eldorado.org.br>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Diffstat (limited to 'docs')
0 files changed, 0 insertions, 0 deletions