1. 12 Jan, 2006 5 commits
  2. 09 Jan, 2006 2 commits
  3. 06 Jan, 2006 3 commits
  4. 07 Dec, 2005 3 commits
    • Venkatesh Pallipadi's avatar
      [CPUFREQ] CPU frequency display in /proc/cpuinfo · 95235ca2
      Venkatesh Pallipadi authored
      What is the value shown in "cpu MHz" of /proc/cpuinfo when CPUs are capable of
      changing frequency?
      Today the answer is: It depends.
      On i386:
      SMP kernel - It is always the boot frequency
      UP kernel - Scales with the frequency change and shows that was last set.
      On x86_64:
      There is one single variable cpu_khz that gets written by all the CPUs. So,
      the frequency set by last CPU will be seen on /proc/cpuinfo of all the
      CPUs in the system. What you see also depends on whether you have constant_tsc
      capable CPU or not.
      On ia64:
      It is always boot time frequency of a particular CPU that gets displayed.
      The patch below changes this to:
      Show the last known frequency of the particular CPU, when cpufreq is present. If
      cpu doesnot support changing of frequency through cpufreq, then boot frequency
      will be shown. The patch affects i386, x86_64 and ia64 architectures.
      Signed-off-by: Venkatesh Pallipadi<venkatesh.pallipadi@intel.com>
      Signed-off-by: default avatarDave Jones <davej@redhat.com>
    • Mattia Dongili's avatar
      [CPUFREQ] Move PMBASE reading away and do it only once at initialization time · 9a7d82a8
      Mattia Dongili authored
      This patch moves away PMBASE reading and only performs it at
      cpufreq_register_driver time by exiting with -ENODEV if unable to read
      the value.
      Signed-off-by: default avatarMattia Dongili <malattia@linux.it>
      Acked-by: default avatarDominik Brodowski <linux@dominikbrodowski.net>
      Signed-off-by: default avatarDave Jones <davej@redhat.com>
    • Mattia Dongili's avatar
      [CPUFREQ] Measure transition latency at driver initialization · 1a10760c
      Mattia Dongili authored
      The attached patch introduces runtime latency measurement for ICH[234]
      based chipsets instead of using CPUFREQ_ETERNAL. It includes
      some sanity checks in case the measured value is out of range and
      assigns a safe value of 500uSec that should still be enough on
      problematics chipsets (current testing report values ~200uSec). The
      measurement is currently done in speedstep_get_freqs in order to avoid
      further unnecessary transitions and in the hope it'll come handy for SMI
      Signed-off-by: default avatarMattia Dongili <malattia@linux.it>
      Acked-by: default avatarDominik Brodowski <linux@dominikbrodowski.net>
      Signed-off-by: default avatarDave Jones <davej@redhat.com>
       speedstep-ich.c |    4 ++--
       speedstep-lib.c |   32 +++++++++++++++++++++++++++++++-
       speedstep-lib.h |    1 +
       speedstep-smi.c |    1 +
       4 files changed, 35 insertions(+), 3 deletions(-)
  5. 06 Dec, 2005 1 commit
  6. 01 Dec, 2005 1 commit
  7. 30 Nov, 2005 1 commit
  8. 29 Nov, 2005 1 commit
  9. 21 Nov, 2005 1 commit
  10. 15 Nov, 2005 4 commits
  11. 14 Nov, 2005 1 commit
  12. 07 Nov, 2005 2 commits
  13. 31 Oct, 2005 9 commits
  14. 22 Oct, 2005 1 commit
  15. 21 Oct, 2005 1 commit
    • Dave Jones's avatar
      [PATCH] cpufreq: fix pending powernow timer stuck condition · 0213df74
      Dave Jones authored
      AMD recently discovered that on some hardware, there is a race condition
      possible when a C-state change request goes onto the bus at the same
      time as a P-state change request.
      Both requests happen, but the southbridge hardware only acknowledges the
      C-state change.  The PowerNow! driver is then stuck in a loop, waiting
      for the P-state change acknowledgement.  The driver eventually times
      out, but can no longer perform P-state changes.
      It turns out the solution is to resend the P-state change, which the
      southbridge will acknowledge normally.
      Thanks to Johannes Winkelmann for reporting this and testing the fix.
      Signed-off-by: default avatarMark Langsdorf <mark.langsdorf@amd.com>
      Signed-off-by: default avatarDave Jones <davej@redhat.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
  16. 20 Oct, 2005 1 commit
  17. 10 Oct, 2005 1 commit
  18. 29 Sep, 2005 1 commit
  19. 27 Sep, 2005 1 commit