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Re: [Qemu-devel] [PATCH v3 0/7] RTC: New logic to emulate RTC
From: |
Zhang, Yang Z |
Subject: |
Re: [Qemu-devel] [PATCH v3 0/7] RTC: New logic to emulate RTC |
Date: |
Wed, 14 Mar 2012 00:00:26 +0000 |
Is there any comments with the version 3?
best regards
yang
> -----Original Message-----
> From: Zhang, Yang Z
> Sent: Friday, March 02, 2012 2:59 PM
> To: address@hidden
> Cc: Jan Kiszka; address@hidden; address@hidden; address@hidden;
> Paolo Bonzini; Marcelo Tosatti
> Subject: [PATCH v3 0/7] RTC: New logic to emulate RTC
>
> Changes in v3:
> Rebase to latest head.
> Remove the logic to update time format when DM bit changed.
> Allow to migrate from old version.
> Solve the async when reading UF and UIP
>
> Changes in v2:
> Add UIP check logic.
> Add logic that next second tick will occur in exactly 500ms later after reset
> divider
>
> Current RTC emulation uses periodic timer(2 timers per second) to update RTC
> clock. And it will stop CPU staying at deep C-state for long period. Our
> experience
> shows the Pkg C6 residency reduced 6% when running 64 idle guest.
> The following patch stop the two periodic timer and only updating RTC clock
> when guest try to read it.
> ---
> Yang Zhang (7):
> RTC: Remove the logic to update time format when DM bit changed
> RTC: Update the RTC clock only when reading it
> RTC: Add UIP(update in progress) check logic
> RTC: Set internal millisecond register to 500ms when reset divider
> RTC: Add RTC update-ended interrupt support
> RTC: Add alarm support
> RTC: Allow to migrate from old version
>
> hw/mc146818rtc.c | 427
> ++++++++++++++++++++++++++++++++++-------------------
> 1 files changed, 274 insertions(+), 153 deletions(-)
>
> best regards
> yang
- [Qemu-devel] [PATCH v3 0/7] RTC: New logic to emulate RTC, Zhang, Yang Z, 2012/03/02
- Re: [Qemu-devel] [PATCH v3 0/7] RTC: New logic to emulate RTC,
Zhang, Yang Z <=
- Re: [Qemu-devel] [PATCH v3 0/7] RTC: New logic to emulate RTC, Paolo Bonzini, 2012/03/14
- Re: [Qemu-devel] [PATCH v3 0/7] RTC: New logic to emulate RTC, Zhang, Yang Z, 2012/03/14
- Re: [Qemu-devel] [PATCH v3 0/7] RTC: New logic to emulate RTC, Paolo Bonzini, 2012/03/14
- Re: [Qemu-devel] [PATCH v3 0/7] RTC: New logic to emulate RTC, Zhang, Yang Z, 2012/03/14
- Re: [Qemu-devel] [PATCH v3 0/7] RTC: New logic to emulate RTC, Paolo Bonzini, 2012/03/15