diff options
| author | peter <peter@FreeBSD.org> | 2002-06-24 21:31:57 +0000 |
|---|---|---|
| committer | peter <peter@FreeBSD.org> | 2002-06-24 21:31:57 +0000 |
| commit | ca21d675fc5f1a22da00120b055eec5dd50de069 (patch) | |
| tree | ca29d2e370241ce59d05a613e29b68cdba51dbe9 /sys | |
| parent | ad5da019260f723e87dcd9cc6e9703147ec70d4b (diff) | |
| download | FreeBSD-src-ca21d675fc5f1a22da00120b055eec5dd50de069.zip FreeBSD-src-ca21d675fc5f1a22da00120b055eec5dd50de069.tar.gz | |
Compile in the cpu halt code even on SMP, instead just default the
sysctl (machdep.cpu_idle_hlt) to off in the SMP case. This allows you to
turn it on if you wish and do not particularly care about the small window
where a cpu will remain halted even when a job is placed on the run queue
(until the next clock tick).
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/amd64/amd64/machdep.c | 6 | ||||
| -rw-r--r-- | sys/i386/i386/machdep.c | 6 |
2 files changed, 8 insertions, 4 deletions
diff --git a/sys/amd64/amd64/machdep.c b/sys/amd64/amd64/machdep.c index 2ec8d1c..2f11ee2 100644 --- a/sys/amd64/amd64/machdep.c +++ b/sys/amd64/amd64/machdep.c @@ -780,7 +780,11 @@ cpu_halt(void) * the !SMP case, as there is no clean way to ensure that a CPU will be * woken when there is work available for it. */ +#ifdef SMP +static int cpu_idle_hlt = 0; +#else static int cpu_idle_hlt = 1; +#endif SYSCTL_INT(_machdep, OID_AUTO, cpu_idle_hlt, CTLFLAG_RW, &cpu_idle_hlt, 0, "Idle loop HLT enable"); @@ -793,7 +797,6 @@ SYSCTL_INT(_machdep, OID_AUTO, cpu_idle_hlt, CTLFLAG_RW, void cpu_idle(void) { -#ifndef SMP if (cpu_idle_hlt) { disable_intr(); if (procrunnable()) { @@ -807,7 +810,6 @@ cpu_idle(void) __asm __volatile("sti; hlt"); } } -#endif } /* diff --git a/sys/i386/i386/machdep.c b/sys/i386/i386/machdep.c index 2ec8d1c..2f11ee2 100644 --- a/sys/i386/i386/machdep.c +++ b/sys/i386/i386/machdep.c @@ -780,7 +780,11 @@ cpu_halt(void) * the !SMP case, as there is no clean way to ensure that a CPU will be * woken when there is work available for it. */ +#ifdef SMP +static int cpu_idle_hlt = 0; +#else static int cpu_idle_hlt = 1; +#endif SYSCTL_INT(_machdep, OID_AUTO, cpu_idle_hlt, CTLFLAG_RW, &cpu_idle_hlt, 0, "Idle loop HLT enable"); @@ -793,7 +797,6 @@ SYSCTL_INT(_machdep, OID_AUTO, cpu_idle_hlt, CTLFLAG_RW, void cpu_idle(void) { -#ifndef SMP if (cpu_idle_hlt) { disable_intr(); if (procrunnable()) { @@ -807,7 +810,6 @@ cpu_idle(void) __asm __volatile("sti; hlt"); } } -#endif } /* |
