diff options
| author | Jan Matyas <50193733+JanMatCodasip@users.noreply.github.com> | 2020-01-10 21:29:10 +0100 |
|---|---|---|
| committer | Tim Newsome <tim@sifive.com> | 2020-01-10 12:29:10 -0800 |
| commit | fcea4f79ba3c119b993e54205af6722dbbdf24d8 (patch) | |
| tree | 7a697dcff40f9b181448eccf7ee00884edbb9a72 | |
| parent | 8b8db033ee118c3a35462b8e8b287652d5ec69d3 (diff) | |
| download | riscv-openocd-fcea4f79ba3c119b993e54205af6722dbbdf24d8.zip riscv-openocd-fcea4f79ba3c119b993e54205af6722dbbdf24d8.tar.gz riscv-openocd-fcea4f79ba3c119b993e54205af6722dbbdf24d8.tar.bz2 | |
Don't issue extra FENCE+FENCE.i for the current hart. (#439)
The original OpenOCD code issued FENCE & FENCE.i twice for the current
hart (which is harmless, but takes time).
Avoiding this extra FENCE is a slight performance improvement. Per my rough
measurements, this improves performance of certain debugger actions
(single-stepping) by approx. 20% in single-hart systems.
| -rw-r--r-- | src/target/riscv/riscv-013.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/target/riscv/riscv-013.c b/src/target/riscv/riscv-013.c index 548c6d5..bc7035f 100644 --- a/src/target/riscv/riscv-013.c +++ b/src/target/riscv/riscv-013.c @@ -2010,6 +2010,10 @@ static int execute_fence(struct target *target) if (!riscv_hart_enabled(target, i)) continue; + if (i == old_hartid) + /* Fence already executed for this hart */ + continue; + riscv_set_current_hartid(target, i); struct riscv_program program; |