search for: time_base

...odec->codec_type == AVMediaType.AVMEDIA_TYPE_VIDEO) { pInputVideoStream = _pInputFormatContext->streams[i]; } } _pOutputStream->avg_frame_rate = pInputVideoStream->avg_frame_rate; _pOutputStream->time_base = pInputVideoStream->time_base; _pOutputStream->sample_aspect_ratio = pInputVideoStream->sample_aspect_ratio; ffmpeg.avcodec_parameters_copy(_pOutputStream->codecpar, pInputVideoStream->codecpar); _pOutputStream->codecpar->codec_type = AVMedi...

Hi, Attached is my patch to add theora encoding to ffmpeg's libavcodec (by using libtheora). I am requesting help to fix the bug I mention below and am seeking general comments before I submit the patch properly. Files encoded using this encoder have a problem playing in VLC. The files will not play unless "Drop late frames" has been unticked in the advanced video settings.

...gt; pInputVideoStream = > > _pInputFormatContext->streams[i]; > > } > > } > > > > _pOutputStream->avg_frame_rate = > > pInputVideoStream->avg_frame_rate; > > _pOutputStream->time_base = pInputVideoStream->time_base; > > _pOutputStream->sample_aspect_ratio = > > pInputVideoStream->sample_aspect_ratio; > > ffmpeg.avcodec_parameters_copy(_pOutputStream->codecpar, > > pInputVideoStream->codecpar); > > _...

...onor the sync request, similarly to ZFS. So to summarize, this is the situation: 1) I run a fio benchmark requesting, small, random, async writes. Command is "fio --direct=1 --sync=0 --rw=randwrite --bs=4K --numjobs=1 --iodepth=1 --runtime=60 --group_reporting --name=sambatest --size=32k --time_based". I run this command on both the host, as on the Samba client, both on the same exact ZFS dataset 2) The ZFS dataset only writes async, converting sync to async writes at all times 3) That same dataset being shared through Samba, also only performs async writes (strict sync = no) 4) With t...

...PE_VIDEO) > { > pInputVideoStream = > _pInputFormatContext->streams[i]; > } > } > > _pOutputStream->avg_frame_rate = > pInputVideoStream->avg_frame_rate; > _pOutputStream->time_base = pInputVideoStream->time_base; > _pOutputStream->sample_aspect_ratio = > pInputVideoStream->sample_aspect_ratio; > ffmpeg.avcodec_parameters_copy(_pOutputStream->codecpar, > pInputVideoStream->codecpar); > _pOutputStream->codecpa...

...do a random sync write benchmark on the host on this dataset, it will use RAM to do the write, drastically speeding up random writes. The below benchmark command on the ZFS host: fio --direct=1 --sync=1 --rw=randwrite --bs=4k --numjobs=1 --iodepth=1 --runtime=60 --group_reporting --name=sambatest --time_based Has an average speed of 520MB/s (which is the maximum speed of my SATA SSD). Despite requesting a sync write, ZFS turns it in an async write, dramatically speeding it up. Clearly the results are great when I directly benchmark from the host into the sync=disabled ZFS dataset. But this doesn't...

...rw-r--r-- 1 libvirt-qemu kvm 5.0G Jul 24 06:26 disk2.img mount: size=21G on /mnt type tmpfs (rw,relatime,size=22020096k) TEST CONFIG =========== FIO (https://linux.die.net/man/1/fio) is being run with and without the patches. Read test config: [Sequential] direct=1 ioengine=libaio runtime=5m time_based filename=/dev/vda bs=4k numjobs=16 rw=read unlink=1 iodepth=256 Write test config: [Sequential] direct=1 ioengine=libaio runtime=5m time_based filename=/dev/vda bs=4k numjobs=16 rw=write unlink=1 iodepth=256 The virtio block device comes up as /dev/vda on the guest with /sys/block/vda/queue/n...

...rw-r--r-- 1 libvirt-qemu kvm 5.0G Jul 24 06:26 disk2.img mount: size=21G on /mnt type tmpfs (rw,relatime,size=22020096k) TEST CONFIG =========== FIO (https://linux.die.net/man/1/fio) is being run with and without the patches. Read test config: [Sequential] direct=1 ioengine=libaio runtime=5m time_based filename=/dev/vda bs=4k numjobs=16 rw=read unlink=1 iodepth=256 Write test config: [Sequential] direct=1 ioengine=libaio runtime=5m time_based filename=/dev/vda bs=4k numjobs=16 rw=write unlink=1 iodepth=256 The virtio block device comes up as /dev/vda on the guest with /sys/block/vda/queue/n...

...6:55 +0000, douxevip wrote: > So to summarize, this is the situation: > > 1) I run a fio benchmark requesting, small, random, async writes. Command is "fio --direct=1 --sync=0 --rw=randwrite --bs=4K --numjobs=1 --iodepth=1 --runtime=60 --group_reporting --name=sambatest --size=32k --time_based". I run this command on both the host, as on the Samba client, both on the same exact ZFS dataset > > 2) The ZFS dataset only writes async, converting sync to async writes at all times > > 3) That same dataset being shared through Samba, also only performs async writes (strict s...

...emu. I use ram disk as backend to compare performance. qemu-nvme: 29MB/s qemu-nvme+google-ext: 100MB/s virtio-blk: 174MB/s virtio-scsi: 118MB/s I'll show you qemu-vhost-nvme+google-ext number later. root at guest:~# cat test.job [global] bs=4k ioengine=libaio iodepth=64 direct=1 runtime=120 time_based rw=randread norandommap group_reporting gtod_reduce=1 numjobs=2 [job1] filename=/dev/nvme0n1 #filename=/dev/vdb #filename=/dev/sda rw=read Patches also available at: kernel: https://git.kernel.org/cgit/linux/kernel/git/mlin/linux.git/log/?h=nvme-google-ext qemu: http://www.minggr.net/cgit/cgit.c...

...emu. I use ram disk as backend to compare performance. qemu-nvme: 29MB/s qemu-nvme+google-ext: 100MB/s virtio-blk: 174MB/s virtio-scsi: 118MB/s I'll show you qemu-vhost-nvme+google-ext number later. root at guest:~# cat test.job [global] bs=4k ioengine=libaio iodepth=64 direct=1 runtime=120 time_based rw=randread norandommap group_reporting gtod_reduce=1 numjobs=2 [job1] filename=/dev/nvme0n1 #filename=/dev/vdb #filename=/dev/sda rw=read Patches also available at: kernel: https://git.kernel.org/cgit/linux/kernel/git/mlin/linux.git/log/?h=nvme-google-ext qemu: http://www.minggr.net/cgit/cgit.c...

...p wrote: > > > So to summarize, this is the situation: > > > > 1. I run a fio benchmark requesting, small, random, async writes. Command is "fio --direct=1 --sync=0 --rw=randwrite --bs=4K --numjobs=1 --iodepth=1 --runtime=60 --group_reporting --name=sambatest --size=32k --time_based". I run this command on both the host, as on the Samba client, both on the same exact ZFS dataset > > > > 2. The ZFS dataset only writes async, converting sync to async writes at all times > > > > 3. That same dataset being shared through Samba, also only performs as...

...mu issue or kernel issue. > > > > > > It sounds odd; can you provide more details on: > > > a) The benchmark you're using. > > I'm using fio, the config is: > > [global] > > ioengine=libaio > > iodepth=128 > > runtime=120 > > time_based > > direct=1 > > > > [randread] > > stonewall > > bs=4k > > filename=/dev/vdb > > rw=randread > > > > > b) the host and the guest config (number of cpus etc) > > The qemu cmd is : /usr/libexec/qemu-kvm --device virtio-balloon -m 16G...

...m sync write benchmark on the host on this dataset, it will use RAM to do the write, drastically speeding up random writes. > The below benchmark command on the ZFS host: > fio --direct=1 --sync=1 --rw=randwrite --bs=4k --numjobs=1 --iodepth=1 --runtime=60 --group_reporting --name=sambatest --time_based > Has an average speed of 520MB/s (which is the maximum speed of my SATA SSD). Despite requesting a sync write, ZFS turns it in an async write, dramatically speeding it up. Clearly the results are great when I directly benchmark from the host into the sync=disabled ZFS dataset. But this doesn...

...vme0n1,format=raw,if=none,id=D22 \ -device nvme,drive=D22,serial=1234 Here is the test results: local NVMe: 860MB/s qemu-nvme: 108MB/s qemu-nvme+google-ext: 140MB/s qemu-nvme-google-ext+eventfd: 190MB/s root at wheezy:~# cat test.job [global] bs=4k ioengine=libaio iodepth=64 direct=1 runtime=60 time_based norandommap group_reporting gtod_reduce=1 numjobs=8 [job1] filename=/dev/nvme0n1 rw=read

On 07/20/2018 06:46 PM, Michael S. Tsirkin wrote: > On Fri, Jul 20, 2018 at 09:29:37AM +0530, Anshuman Khandual wrote: >> This patch series is the follow up on the discussions we had before about >> the RFC titled [RFC,V2] virtio: Add platform specific DMA API translation >> for virito devices (https://patchwork.kernel.org/patch/10417371/). There >> were suggestions

On 07/20/2018 06:46 PM, Michael S. Tsirkin wrote: > On Fri, Jul 20, 2018 at 09:29:37AM +0530, Anshuman Khandual wrote: >> This patch series is the follow up on the discussions we had before about >> the RFC titled [RFC,V2] virtio: Add platform specific DMA API translation >> for virito devices (https://patchwork.kernel.org/patch/10417371/). There >> were suggestions

...hz Xeon E5-1650), running QEMU: $ bin/opt/native/x86_64-softmmu/qemu-system-x86_64 \ -enable-kvm -m 2048 -smp 4 \ -drive if=virtio,file=debian.raw,cache=none \ -drive file=nvme.raw,if=none,id=nvme-dev \ -device nvme,drive=nvme-dev,serial=nvme-serial Using "fio": vm # fio -time_based --name=benchmark --ioengine=libaio --iodepth=32 \ --numjobs=1 --runtime=30 --blocksize=4k --filename=/dev/nvme0n1 \ --nrfiles=1 --invalidate=1 --verify=0 --direct=1 --rw=randread I get about 20k IOPs with the original code and about 85k IOPs with the vendor extension changes applied (and...

On 20/11/2015 09:11, Ming Lin wrote: > On Thu, 2015-11-19 at 11:37 +0100, Paolo Bonzini wrote: >> >> On 18/11/2015 06:47, Ming Lin wrote: >>> @@ -726,7 +798,11 @@ static void nvme_process_db(NvmeCtrl *n, hwaddr addr, int val) >>> } >>> >>> start_sqs = nvme_cq_full(cq) ? 1 : 0; >>> - cq->head = new_head;

On 20/11/2015 09:11, Ming Lin wrote: > On Thu, 2015-11-19 at 11:37 +0100, Paolo Bonzini wrote: >> >> On 18/11/2015 06:47, Ming Lin wrote: >>> @@ -726,7 +798,11 @@ static void nvme_process_db(NvmeCtrl *n, hwaddr addr, int val) >>> } >>> >>> start_sqs = nvme_cq_full(cq) ? 1 : 0; >>> - cq->head = new_head;