linux-kernel - [PATCH 0/2] cpufreq: ondemand: Eliminate the deadband effect

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 30 Jun 2014 19:59:32 +0300
From:	Stratos Karafotis <stratosk@...aphore.gr>
To:	rjw@...ysocki.net, viresh.kumar@...aro.org
Cc:	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 0/2] cpufreq: ondemand: Eliminate the deadband effect

Hi all,

This patchset changes slightly the calculation of target frequency to
eliminate the deadband effect (explained in patch 2 changelog) that it
seems to slow down the CPU in low and medium loads.

Patch 1 introduces a new relation (RELATION_C) for the next frequency
selection, which chooses the closest frequency to target.

Patch 2 is the actual change to ondemand governor.

You may find graphs with the 'deadband' effect and benchmark results:
https://docs.google.com/spreadsheets/d/16kDBh5lyc6YvBnoS1hUa1t2O38z0xrWvaEj5XtJ8auw/edit#gid=2072493052

Thanks


Stratos Karafotis (2):
  cpufreq: Introduce new relation for freq selection
  cpufreq: ondemand: Eliminate the deadband effect in low loads

 drivers/cpufreq/cpufreq_ondemand.c | 11 +++++++----
 drivers/cpufreq/freq_table.c       | 12 +++++++++++-
 include/linux/cpufreq.h            |  1 +
 3 files changed, 19 insertions(+), 5 deletions(-)

-- 
1.9.3

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/