diff options
Diffstat (limited to 'share/man/man4/man4.i386/apm.4')
| -rw-r--r-- | share/man/man4/man4.i386/apm.4 | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/share/man/man4/man4.i386/apm.4 b/share/man/man4/man4.i386/apm.4 index ddce25e..b301a2f 100644 --- a/share/man/man4/man4.i386/apm.4 +++ b/share/man/man4/man4.i386/apm.4 @@ -48,7 +48,7 @@ exports an application interface as a character device. Applications can control APM, or retrieve APM status information via this interface. .Nm exports the following interfaces. These symbols are defined in -.Dq Pa /usr/include/machine/apm_bios.h. +.Dq Pa /usr/include/machine/apm_bios.h . .Bl -tag -width 4n -offset indent .It Sy APMIO_SUSPEND Suspend system. @@ -66,17 +66,17 @@ Get per battery information. Some APM implementations execute the HLT .Pq Halt CPU until an interrupt occurs instruction in the -.Dq Pa Idle CPU +.Dq Em Idle CPU call, while others do not. Thus enabling this may result in redundant HLT executions because -.Dq Pa Idle CPU +.Dq Em Idle CPU is called from the kernel context switch routine that inherently executes HLT. This may reduce peak system performance. .Pp Also the system hangs up if HLT instruction is disabled in the kernel context switch routine, and if the APM implementation of the machine does not execute HLT in -.Dq Pa Idle CPU. +.Dq Em Idle CPU . On some implementations that do not support CPU clock slowdown, APM might not execute HLT. .Nm @@ -87,7 +87,7 @@ operation on such machines. The current version of .Nm does not call -.Dq Pa Idle CPU +.Dq Em Idle CPU from the kernel context switch routine if clock slowdown is not supported, and it executes HLT instruction by default. Therefore, there is no need to use these two operations in most cases. |
