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| author | Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com> | 2021-10-01 21:38:40 +0300 |
|---|---|---|
| committer | Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com> | 2021-10-01 21:40:21 +0300 |
| commit | 9c881021a269af242594e2dfc79f1c4701404887 (patch) | |
| tree | c8ec14f412d7ea35009b2dee08770082ddbb5c6e /include/linux/energy_model.h | |
| parent | e9479d98b87227b8b7502c4c1e778887b23799f1 (diff) | |
| parent | cf06e1ab1c3ed354da5873e646f2164fea147c88 (diff) | |
| download | linux-dev-5.10-intel.tar.xz | |
Merge branch 'dev-5.10' into dev-5.10-inteldev-5.10-intel
Pull 5.10.67 stable from OpenBMC upstream.
Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
Diffstat (limited to 'include/linux/energy_model.h')
| -rw-r--r-- | include/linux/energy_model.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/energy_model.h b/include/linux/energy_model.h index b67a51c574b9..5f04a2b35e80 100644 --- a/include/linux/energy_model.h +++ b/include/linux/energy_model.h @@ -51,6 +51,22 @@ struct em_perf_domain { #ifdef CONFIG_ENERGY_MODEL #define EM_MAX_POWER 0xFFFF +/* + * Increase resolution of energy estimation calculations for 64-bit + * architectures. The extra resolution improves decision made by EAS for the + * task placement when two Performance Domains might provide similar energy + * estimation values (w/o better resolution the values could be equal). + * + * We increase resolution only if we have enough bits to allow this increased + * resolution (i.e. 64-bit). The costs for increasing resolution when 32-bit + * are pretty high and the returns do not justify the increased costs. + */ +#ifdef CONFIG_64BIT +#define em_scale_power(p) ((p) * 1000) +#else +#define em_scale_power(p) (p) +#endif + struct em_data_callback { /** * active_power() - Provide power at the next performance state of |