Commit 0fdfc2a5 authored by Artem Bityutskiy's avatar Artem Bityutskiy Committed by Jun Tian
Browse files

intel_idle: update ICX C6 data

mainline inclusion
from mainline-v5.13-rc1
commit d484b8bf
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I5BECY


CVE: NA

Intel-SIG: commit d484b8bf intel_idle: update ICX C6 data.
Backport intel_idle driver

--------------------------------

Change IceLake Xeon C6 latency from 128 us to 170 us. The latency
was measured with the "wult" tool and corresponds to the 99.99th
percentile when measuring with the "nic" method. Note, the 128 us
figure correspond to the median latency, but in intel_idle we use
the "worst case" latency figure instead.

C6 target residency was increased from 384 us to 600 us, which may
result in less C6 residency in some workloads. This value was tested
and compared to values 384, and 1000. Value 600 is a reasonable
tradeoff between power and performance.

Signed-off-by: default avatarArtem Bityutskiy <artem.bityutskiy@linux.intel.com>
Acked-by: default avatarZhang Rui <rui.zhang@intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: default avataryingbao jia <yingbao.jia@intel.com>
Signed-off-by: default avatarJun Tian <jun.j.tian@intel.com>
parent 5f821431
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