search for: 10mib

...i there I am analyzing disk performance. I'm testing raw (tap: aio) and lvm (phy :). The tests I'm doing on a SLES11SP3, cpu I7, 4GBRam, disco-SATAII 7200rpm. With phy: lvm achievement 70-80MiB / s (an acceptable value) With tap: aio: file.raw achievement 5-9MiB / s, which is very low ... 10MiB / s is what you should expect access to a tap: aio: file.raw? or I have something misconfigured? my cfg is: name = "satotestx" maxmem = 1024 memory = 1024 vcpus = 4 bootloader="/usr/bin/pygrub" boot = "dc" pae = 0 acpi = 1 apic = 1 hap = 1 viridian = 0 hpet = 0 rtc_t...

Hi all, As the resident Linux guru, I've just been tasked with costing a webmail setup for about 600 000 users. They each have 10MiB (small, I know) mailboxes. The current setup has about 40 million web page accesses per month. Has anyone here any experience with this kind of thing? If so, any pointers as to software and hardware used, and any other advice would be appreciated. TIA -- Cheers! (Relax...have a homebrew) Nei...

I got really strange situation with memory on host: xe host-list params=memory-free memory-free ( RO) : 10305536 (10Mb) xe host-compute-free-memory 3147059200 (3Gb) A huge difference! And xentop show different numbers too! I will keep this host online "as is" and I am ready to provide information for debbugging or perform needed actions. -- wBR,George.

Hi, I am using XenServer5.6 FP1 GA release with openvswitch as network backend. When I create VM through xapi, "apache.xmlrpc.XmlRpcException: I/O error" happens very frequently. At meanwhile my xencenter lost connection to hosts. Another thing is when I tried to kill VMs from xencenter, it complains "Internal error:Sys_error("Thread.create: Cannot allocate

...nning drives it *might* be a win but for SATA and especially PCIe / NVMe SSD it could be a CPU bottleneck? Though we should also bear in mind that compression can be pipelined with writes in i) and debug info loading could be lazy in ii) (e.g. for highly compressible data we've generally seen ~10MiB/s output bandwidth on single thread i7 @3.2GHz memory to memory for zlib9 with 32KiB window, that doesn't stack up well against modern IO) How is the compression implemented in lld? Is it chunked and therefore paralellizable (and able to be pipelined with IO) or more serial? I think the inten...

...A and especially PCIe / NVMe SSD it >> could be a CPU bottleneck? Though we should also bear in mind that >> compression can be pipelined with writes in i) and debug info loading could >> be lazy in ii) >> >> (e.g. for highly compressible data we've generally seen ~10MiB/s output >> bandwidth on single thread i7 @3.2GHz memory to memory for zlib9 with 32KiB >> window, that doesn't stack up well against modern IO) >> >> How is the compression implemented in lld? Is it chunked and therefore >> paralellizable (and able to be pipelined...

Hi, I zero-filled first 10MiB of my SSD(dd if=/dev/zero of=/dev/sda bs=10M count=1). As expected, this wiped my primary GPD header and first partition. Before the wipe, GPT was following: Disk /dev/sda: 250069680 sectors, 119.2 GiB Logical sector size: 512 bytes Disk identifier (GUID): 2EFD285D-F8E6-4262-B380-232E866AF15C Part...

...>>> could be a CPU bottleneck? Though we should also bear in mind that >>>> compression can be pipelined with writes in i) and debug info loading could >>>> be lazy in ii) >>>> >>>> (e.g. for highly compressible data we've generally seen ~10MiB/s output >>>> bandwidth on single thread i7 @3.2GHz memory to memory for zlib9 with 32KiB >>>> window, that doesn't stack up well against modern IO) >>>> >>>> How is the compression implemented in lld? Is it chunked and therefore >>>>...

Thanks for the reply. On 28 April 2014 20:01, Reid Kleckner <rnk at google.com> wrote: > The problem with tcmalloc seems like a real problem. I can't think of any > good workarounds. My best worst idea is to try to figure out if malloc is > coming from libc with dlsym and dlopen, and then use that to decide whether > we add these two numbers together. I'm not sure we

Hi Bob, On Tue, 6 Oct 2020 20:56:39 -0400, Robert Buck <robert.buck at som.com> wrote: > Hi Martin, you seem to do a lot of work on CTDB. Let me ask a question... Yes, I have done a lot of work on CTDB. A bit less lately... > Is there a way to segment CTDB/Samba to minimize chatter? Specifically, > what I have in mind... In recent years advances have been made in >

Also not an expert, but would it make sense for this to be configurable at a fine-grained level, perhaps with another option, or an extension to the compress-debug-sections switch interface? That way users who care about the finer details can configure it themselves. And we should pick sensible options for the default. James On 2 August 2018 at 11:08, Pavel Labath via llvm-dev < llvm-dev at

I''m looking to try BTRFS on a SSD, and I would like to know what SSD optimizations it applies. Is there a comprehensive list of what ssd mount option does? How are the blocks and metadata arranged? Are there options available comparable to ext2/ext3 to help reduce wear and improve performance? Specifically, on ext2 (journal means more writes, so I don''t use ext3 on SSDs,

Good day. We trying to test XCP cloud under some product-like load (4 hosts, each with 24Gb mem and 8 cores) But with just about 30-40 virtual machines I got an extreme load on dom0 on pool master host: LA is about 3.5-6, and most time are used by xapi and stunnel processes. It''s really bother me: what happens on higher load with few thousands of VMs with about 10-16 hosts in pool...

Hello all, In https://www.youtube.com/watch?v=qq0q1hfzidg, Adam Nemet (cc'ed) describes optimization remarks and some future plans for the project. I had a few follow-up questions: 1. As an example of future work to be done, the talk mentions expanding the set of optimization passes that emit remarks. However, the Clang User Manual mentions that "optimization remarks do not really make