Messages in this thread Patch in this message | | | From | Huang Rui <> | Subject | [RFC PATCH 3/4] x86, mwaitt: add document to describe mwaitx | Date | Tue, 19 May 2015 16:01:11 +0800 |
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This patch adds a description in the kernel parameters documentation for "idle=mwaitx".
Signed-off-by: Huang Rui <ray.huang@amd.com> --- Documentation/kernel-parameters.txt | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 61ab162..af88c5c 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1363,7 +1363,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted. Claim all unknown PCI IDE storage controllers. idle= [X86] - Format: idle=poll, idle=halt, idle=nomwait + Format: idle=poll, idle=halt, idle=nomwait, + idle=mwaitx[,<timer value>] Poll forces a polling idle loop that can slightly improve the performance of waking up a idle CPU, but will use a lot of power and make the system run hot. @@ -1371,6 +1372,13 @@ bytes respectively. Such letter suffixes can also be entirely omitted. idle=halt: Halt is forced to be used for CPU idle. In such case C2/C3 won't be used again. idle=nomwait: Disable mwait for CPU C-states + idle=mwaitx[,<timer value>]: Enable mwaitx and + configure max waiting timeout value (usec) for CPU + idle. If <timer value> is not specified, the + maximum timeout value (ebx=0xffffffff * TSC cycle) + will be used. If <timer value> is specified as + zero, the timer is disabled. Waiting exits via + other reasons, such as an IPI. ignore_loglevel [KNL] Ignore loglevel setting - this will print /all/ -- 2.1.0
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