Date: Fri, 15 Jan 2016 03:45:09 +0000 (UTC) From: Benjamin Kaduk <bjk@FreeBSD.org> To: doc-committers@freebsd.org, svn-doc-all@freebsd.org, svn-doc-head@freebsd.org Subject: svn commit: r48019 - head/en_US.ISO8859-1/htdocs/news/status Message-ID: <201601150345.u0F3j9CF065476@repo.freebsd.org>
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Author: bjk Date: Fri Jan 15 03:45:09 2016 New Revision: 48019 URL: https://svnweb.freebsd.org/changeset/doc/48019 Log: Add FreeBSD Integration Services entry from Dexuan Cui Modified: head/en_US.ISO8859-1/htdocs/news/status/report-2015-10-2015-12.xml Modified: head/en_US.ISO8859-1/htdocs/news/status/report-2015-10-2015-12.xml ============================================================================== --- head/en_US.ISO8859-1/htdocs/news/status/report-2015-10-2015-12.xml Fri Jan 15 01:59:38 2016 (r48018) +++ head/en_US.ISO8859-1/htdocs/news/status/report-2015-10-2015-12.xml Fri Jan 15 03:45:09 2016 (r48019) @@ -2206,4 +2206,134 @@ </task> </help> </project> + + <project cat='kern'> + <title>&os; Integration Services (BIS) </title> + + <contact> + <person> + <name> + <given>Dexuan</given> + <common>Cui</common> + </name> + <email>decui@microsoft.com</email> + </person> + + <person> + <name> + <given>Hongjiang</given> + <common>Zhang</common> + </name> + <email>honzhan@microsoft.com</email> + </person> + </contact> + + <links> + <url href="https://wiki.FreeBSD.org/HyperV">&os; Virtual Machines on Microsoft Hyper-V</url> + <url href="https://technet.microsoft.com/en-us/library/dn531030.aspx">Linux and &os; Virtual Machines on Hyper-V</url> + </links> + + <body> + <p>When &os; virtual machines (VMs) run on Hyper-V, in order + to get the best network and storage performance and make full use + of all the benefits that Hyper-V provides, it is recommended to + use Hyper-V synthetic devices. The collection of drivers that are + required to run Hyper-V synthetic devices in &os; are known as + &os; Integration Services (BIS). Some of the BIS drivers (like + network and storage drivers) have existed in &os; 9.x and 10.x for + years, but there are still some performance and stability issues + and bugs. Additionally, compared with Windows and Linux VMs, the + current BIS lacks some important features, such as the virtual + Receive Side Scaling (vRSS) support in the Hyper-V network driver + and the support for UEFI VM (boot from UEFI), among others.</p> + + <p>We are now working more on the issues and performance + tuning to make &os; VM run better on Hyper-V and the Hyper-V based + cloud platform Azure.</p> + + <p>Our work during 2015Q4 is documented below:</p> + + <ul> + <li>Optimizing the VMBus driver and Hyper-V network driver + for performance: + <ul> + <li>Sent out patches to enable <tt>INTR_MPSAFE</tt> for + the interrupt handling thread, speed up + relid-to-channel lookup in the thread by map table, + and optimize the VMBus ringbuffer writable + notification to the host.</li> + + <li>Developing a patch to enable the virtual Receive + Side Scaling (vRSS) for Hyper-V network device driver. + This will greatly improve the network performance for + SMP virtual machine (VM).</li> + + <li>Sent out a patch to enable the Hyper-V timer, which + will improve the accuracy of timekeeping when &os; VMs + run on Hyper-V.</li> + </ul> + </li> + + <li>Fixing bugs and cleaning up the code: + <ul> + <li>Fixed a bug in checksum offloading (PR 203630 + — [Hyper-V] [nat] [tcp] 10.2 NAT bug in TCP stack + or hyperv netsvc driver) in the Hyper-V network driver, + making &os; VM based NAT gateways work more reliably.</li> + + <li>Fixed a serialization issue in the initialization of + VMBus devices, fixing PR 205156 ([Hyper-V] NICs' (hn0, + hn1) MAC addresses can appear in an uncertain way across + reboot).</li> + + <li>Fixed a KVP (Key-Value Pair) issue (retrieving a + key's value can hang for an uncertain period of + time).</li> + + <li>Added ioctl support for SIOCGIFMEDIA for the Hyper-V + network driver, fixing PR 187006 ([Hyper-V] dynamic + address (DHCP) obtaining doesn't work on HYPER-V OS + 2012 R2).</li> + + <li>Sent out patches to add an interrupt counter for + Hyper-V VMBus interrupts (so the user can easily get + the statistical information about VMBus interrupts), + and fix the KVP daemon's poll timeout (so the daemon + will avoid unnecessary polling every 100 + milliseconds.</li> + + <li>Identified a TSC calibration issue: the i8254 PIT + timer emulation of Hyper-V is not fully reliable, so + the Hyper-V time counter should be used to calibrate + the TSC. A patch was drafted. With the patch, it looks + the warning kernel message (e.g., "calcru: runtime + went backwards from 46204978 usec to 23362331 usec for + pid 0 (kernel)") will go away, and the time-based + tracing of Dtrace will be more accurate.</li> + </ul> + </li> + + <li>We plan to add support for UEFI VMs (a.k.a., Hyper-V + Generation-2 VMs). Currently some issues and to-do items were + identified: e.g., we cannot use the i8254 PIT to calibrate the + TSC because the i8254 PIT does not exist in a UEFI VM, and we + need to add support for the Hyper-V synthetic + keyboard/mouse/framebuffer device.</li> + + <li>We are working on a disk detection issue: when a &os; VM + runs on a Windows Server 2016 Technical Preview host, the VM + will detect 16 disks whereas only 1 disk is configured for the + VM. Due to this issue, VMs running on these hosts can fail to + boot. A workaround patch was made and we are trying to make a + formal fix.</li> + + <li>We are tidying up some internal BIS test cases and plan + to publish them on github.</li> + </ul> + </body> + + <sponsor> + Microsoft + </sponsor> + </project> </report>
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