From: Akio Takebe <takebe_akio@jp.fujitsu.com>
To: xen-devel <xen-devel@lists.xensource.com>
Cc: "Tian, Kevin" <kevin.tian@intel.com>, "Yu, Ke" <ke.yu@intel.com>
Subject: How to use deeper C state
Date: Wed, 21 Jan 2009 18:02:59 +0900 [thread overview]
Message-ID: <58C97BA70EB797takebe_akio@jp.fujitsu.com> (raw)
Hi,
When I tried cpuidle option,
max_cstate indicates C7 with debug-key in my machine.
But the result of "xenpm start" doesn't say
that xen enter C2 or more state.
Do I need anything else(boot option and so on)?
(XEN) ==cpu0==
(XEN) active state: C1
(XEN) max_cstate: C7
(XEN) states:
(XEN) *C1: type[C1] latency[000] usage[00409594] duration
[1893990621775]
(XEN) C0: usage[00409594] duration[22279357433]
(XEN) ==cpu1==
(XEN) active state: C1
(XEN) max_cstate: C7
(XEN) states:
(XEN) *C1: type[C1] latency[000] usage[00396768] duration
[1891756608514]
(XEN) C0: usage[00396768] duration[24513377367]
# xenpm start
Elapsed time (ms): 466915
CPU0:
residency percentage
C0 220 ms 0.05%
C1 466695 ms 99.95%
P0 60 ms 100.00%
P1 0 ms 0.00%
CPU1:
residency percentage
C0 606 ms 0.13%
C1 466309 ms 99.87%
P0 450 ms 100.00%
P1 0 ms 0.00%
Best Regards,
Akio Takebe
next reply other threads:[~2009-01-21 9:02 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-21 9:02 Akio Takebe [this message]
2009-01-21 9:10 ` How to use deeper C state Keir Fraser
2009-01-21 9:27 ` Wei, Gang
2009-01-21 9:24 ` Wei, Gang
2009-01-21 9:35 ` Akio Takebe
2009-01-21 10:08 ` Wei, Gang
2009-01-21 10:14 ` Akio Takebe
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