| commit | c22edfebff29f63d793032e4fbd42a035bb73e27 | |
| author | Alex Bennée <alex.bennee@linaro.org> | |
| Thu, 23 Feb 2017 18:29:24 +0000 (23 18:29 +0000) | ||
| committer | Alex Bennée <alex.bennee@linaro.org> | |
| Fri, 24 Feb 2017 10:32:46 +0000 (24 10:32 +0000) | ||
| tree | 044ff53d9b0d2b90df07e228e619b9d8f2513ae7 | treesnapshot (tar.gz zip) |
| parent | 062ba099e01ff1474be98c0a4f3da351efab5d9d | commitdiff |
target-arm: don't generate WFE/YIELD calls for MTTCG
The WFE and YIELD instructions are really only hints and in TCG's case
they were useful to move the scheduling on from one vCPU to the next. In
the parallel context (MTTCG) this just causes an unnecessary cpu_exit
and contention of the BQL.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
The WFE and YIELD instructions are really only hints and in TCG's case
they were useful to move the scheduling on from one vCPU to the next. In
the parallel context (MTTCG) this just causes an unnecessary cpu_exit
and contention of the BQL.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
| target/arm/op_helper.c | diffblobblamehistory | |
| target/arm/translate-a64.c | diffblobblamehistory | |
| target/arm/translate.c | diffblobblamehistory |