The branch main has been updated by cperciva:
URL:
https://cgit.FreeBSD.org/src/commit/?id=02ab915ae014a07da8243120d231919eb5633c95
commit 02ab915ae014a07da8243120d231919eb5633c95
Author: Colin Percival <cperc...@freebsd.org>
AuthorDate: 2022-08-12 23:51:34 +0000
Commit: Colin Percival <cperc...@freebsd.org>
CommitDate: 2022-08-13 22:28:09 +0000
lapic_init: Reduce LOOPS
While I'm here, instrument lapic_init with TSLOG so it shows up (or
typically not, after this change) on flamecharts.
Reviewed by: kib
Sponsored by: https://www.patreon.com/cperciva
Differential Revision: https://reviews.freebsd.org/D36186
---
sys/x86/x86/local_apic.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/sys/x86/x86/local_apic.c b/sys/x86/x86/local_apic.c
index ec4f821f99ed..42a5a9fd4c8c 100644
--- a/sys/x86/x86/local_apic.c
+++ b/sys/x86/x86/local_apic.c
@@ -434,6 +434,8 @@ lapic_init(vm_paddr_t addr)
int i;
bool arat;
+ TSENTER();
+
/*
* Enable x2APIC mode if possible. Map the local APIC
* registers page.
@@ -531,7 +533,7 @@ lapic_init(vm_paddr_t addr)
}
#ifdef SMP
-#define LOOPS 100000
+#define LOOPS 1000
/*
* Calibrate the busy loop waiting for IPI ack in xAPIC mode.
* lapic_ipi_wait_mult contains the number of iterations which
@@ -563,6 +565,8 @@ lapic_init(vm_paddr_t addr)
}
#undef LOOPS
#endif /* SMP */
+
+ TSEXIT();
}
/*
