kern: proc: Add enhanced processor arbitration

Unlike the previouses systems where there was a global arbiter and a
shared lock, rv7 derives a zero-based processor index by using the lower
8 bits of the pid MOD the core count. This significantly reduces
contention.

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/sys/os/os_process.c b/sys/os/os_process.c
index 6bfa220..c80dcc4 100644
--- a/sys/os/os_process.c
+++ b/sys/os/os_process.c
@@ -43,6 +43,7 @@ process_init(struct process *process, uintptr_t ip, int flags)
     }
 
     process->pid = next_pid;
+    process->affinity = -1;
     atomic_inc_64(&next_pid);
     mu_process_init(process, ip, flags);
     return 0;