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...ES10 for a farm of web servers. The code on SLES10 differs a bit from the upstream variant but the performance results should be still valid. You will find the report here: http://www.vm.ibm.com/perf/reports/zvm/html/530cmm.html (the VMRM-CMM the web page speaks about is the balloon approach, CMMA is the guest page hinting). Both approaches to the memory overcommit problem show comparable benefits for this workload, with an advantage for guest page hinting for large number of guests. For other workloads your mileage may vary. The main benefit for guest page hinting vs. the ballooner is tha...

...ES10 for a farm of web servers. The code on SLES10 differs a bit from the upstream variant but the performance results should be still valid. You will find the report here: http://www.vm.ibm.com/perf/reports/zvm/html/530cmm.html (the VMRM-CMM the web page speaks about is the balloon approach, CMMA is the guest page hinting). Both approaches to the memory overcommit problem show comparable benefits for this workload, with an advantage for guest page hinting for large number of guests. For other workloads your mileage may vary. The main benefit for guest page hinting vs. the ballooner is tha...

...qemu_mutex_lock_iothread(); > + > + filter_out_guest_free_pages(migration_bitmap_rcu->free_pages_bmap); A general comment: Using the ballooner to get information about pages that can be filtered out is too limited (there may be other ways to do this; we might be able to use cmma on s390, for example), and I don't like hardcoding to a specific method. What about the reverse approach: Code may register a handler that populates the free_pages_bitmap which is called during this stage? <I like the idea of filtering in general, but I haven't looked at the code yet&g...

Get the free pages information through virtio and filter out the free pages in the ram bulk stage. This can significantly reduce the total live migration time as well as network traffic. Signed-off-by: Liang Li <liang.z.li at intel.com> --- migration/ram.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++------ 1 file changed, 46 insertions(+), 6 deletions(-) diff --git

Greetings, after Carsten pitched CMM2 on the kvm mini summit here is a repost of version 5 of the guest page hinting patches. The code is still the same but has been adapted to the latest git level. -- blue skies, Martin. "Reality continues to ruin my life." - Calvin.

Greetings, after Carsten pitched CMM2 on the kvm mini summit here is a repost of version 5 of the guest page hinting patches. The code is still the same but has been adapted to the latest git level. -- blue skies, Martin. "Reality continues to ruin my life." - Calvin.

After way to many months here is the fifth version of the guest page hinting patches. Compared to version four a few improvements have been added: - Avoid page_host_discards() calls outside of page-states.h - The discard list is now implemented via the page_free_discarded hook and architecture specific code. - PG_state_change page flag has been replaced with architecture specficic

After way to many months here is the fifth version of the guest page hinting patches. Compared to version four a few improvements have been added: - Avoid page_host_discards() calls outside of page-states.h - The discard list is now implemented via the page_free_discarded hook and architecture specific code. - PG_state_change page flag has been replaced with architecture specficic

The current QEMU live migration implementation mark the all the guest's RAM pages as dirtied in the ram bulk stage, all these pages will be processed and that takes quit a lot of CPU cycles. >From guest's point of view, it doesn't care about the content in free pages. We can make use of this fact and skip processing the free pages in the ram bulk stage, it can save a lot CPU cycles

The current QEMU live migration implementation mark the all the guest's RAM pages as dirtied in the ram bulk stage, all these pages will be processed and that takes quit a lot of CPU cycles. >From guest's point of view, it doesn't care about the content in free pages. We can make use of this fact and skip processing the free pages in the ram bulk stage, it can save a lot CPU cycles

...upgraded from a SPARCstation 5, to an Ultra 10, to the current Ultra 60 over the years). The CPUs are idle most of the time, so my only real concern is cutting down the memory usage. Thanks in advance, -Byran Return-Path: <list@fornax.net> Delivered-To: samba@lists.samba.org Received: from cmmaustralia.com (unknown [203.34.190.215]) by lists.samba.org (Postfix) with SMTP id B8F8644F9 for <samba@lists.samba.org>; Thu, 23 Aug 2001 18:30:13 -0700 (PDT) Received: (qmail 14566 invoked by uid 506); 24 Aug 2001 01:32:44 -0000 Received: from list@fornax.net by cmma.cmmaustralia.com with...