search for: badari

...: ============== I see degraded IO performance when doing sequential IO write tests with vhost-blk compared to virtio-blk. # time dd of=/dev/vda if=/dev/zero bs=2M oflag=direct I get ~110MB/sec with virtio-blk, but I get only ~60MB/sec with vhost-blk. Wondering why ? Comments/flames ? Thanks, Badari vhost-blk is in-kernel accelerator for virtio-blk. At this time, this is a prototype based on virtio-net. Lots of error handling and clean up needs to be done. Read performance is pretty good over QEMU virtio-blk, but write performance is not anywhere close to QEMU virtio-blk. Why ? Signed-off-...

...: ============== I see degraded IO performance when doing sequential IO write tests with vhost-blk compared to virtio-blk. # time dd of=/dev/vda if=/dev/zero bs=2M oflag=direct I get ~110MB/sec with virtio-blk, but I get only ~60MB/sec with vhost-blk. Wondering why ? Comments/flames ? Thanks, Badari vhost-blk is in-kernel accelerator for virtio-blk. At this time, this is a prototype based on virtio-net. Lots of error handling and clean up needs to be done. Read performance is pretty good over QEMU virtio-blk, but write performance is not anywhere close to QEMU virtio-blk. Why ? Signed-off-...

...3 ++ > drivers/vhost/Makefile | 3 + > drivers/vhost/blk.c | 510 +++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 526 insertions(+) > create mode 100644 drivers/vhost/blk.c > Hi: Thanks for the patches. This is not the first attempt for having vhost-blk: - Badari's version: https://lwn.net/Articles/379864/ - Asias' version: https://lwn.net/Articles/519880/ It's better to describe the differences (kiocb vs bio? performance?). E.g if my memory is correct, Asias said it doesn't give much improvement compared with userspace qemu. And what...

...3 ++ > drivers/vhost/Makefile | 3 + > drivers/vhost/blk.c | 510 +++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 526 insertions(+) > create mode 100644 drivers/vhost/blk.c > Hi: Thanks for the patches. This is not the first attempt for having vhost-blk: - Badari's version: https://lwn.net/Articles/379864/ - Asias' version: https://lwn.net/Articles/519880/ It's better to describe the differences (kiocb vs bio? performance?). E.g if my memory is correct, Asias said it doesn't give much improvement compared with userspace qemu. And what...

...; # G: vhost-blk kiocb over file >>> # >>> # A B C D E F G >>> 16 1480k 1506k 101k 102k 1346k 1202k 566k >> Hi: >> >> Thanks for the patches. >> >> This is not the first attempt for having vhost-blk: >> >> - Badari's version: https://lwn.net/Articles/379864/ >> >> - Asias' version: https://lwn.net/Articles/519880/ >> >> It's better to describe the differences (kiocb vs bio? performance?). >> E.g if my memory is correct, Asias said it doesn't give much improvement...

...; # G: vhost-blk kiocb over file >>> # >>> # A B C D E F G >>> 16 1480k 1506k 101k 102k 1346k 1202k 566k >> Hi: >> >> Thanks for the patches. >> >> This is not the first attempt for having vhost-blk: >> >> - Badari's version: https://lwn.net/Articles/379864/ >> >> - Asias' version: https://lwn.net/Articles/519880/ >> >> It's better to describe the differences (kiocb vs bio? performance?). >> E.g if my memory is correct, Asias said it doesn't give much improvement...

...and write), before submitting them. This significantly improved IO performance. I am still collecting performance numbers, I will be posting in next few days. Comments ? Todo: - Address hch's comments on annontations - Implement per device read/write queues - Finish up error handling Thanks, Badari --- drivers/vhost/blk.c | 445 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 445 insertions(+) Index: net-next/drivers/vhost/blk.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ net-next/drivers/vh...

...and write), before submitting them. This significantly improved IO performance. I am still collecting performance numbers, I will be posting in next few days. Comments ? Todo: - Address hch's comments on annontations - Implement per device read/write queues - Finish up error handling Thanks, Badari --- drivers/vhost/blk.c | 445 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 445 insertions(+) Index: net-next/drivers/vhost/blk.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ net-next/drivers/vh...

...Patil <patila@marvell.com> Axel Castaneda Gonzalez <x0055901@ti.com> Axel Koellhofer <AxelKoellhofer@web.de> Axel Lin <axel.lin@gmail.com> Axel Lin <axel.lin@ingics.com> Azael Avalos <coproscefalo@gmail.com> Babu Moger <babu.moger@netapp.com> Badari Pulavarty <pbadari@us.ibm.com> Baker Zhang <baker.zhang@gmail.com> Bala Shanmugam <bkamatch@qca.qualcomm.com> Balaji T K <balajitk@ti.com> Balakumaran Kannan <Balakumaran.Kannan@ap.sony.com> Bao Haojun <hjbao@marvell.com> Baodong Chen <chenbdchenbd...

...Patil <patila@marvell.com> Axel Castaneda Gonzalez <x0055901@ti.com> Axel Koellhofer <AxelKoellhofer@web.de> Axel Lin <axel.lin@gmail.com> Axel Lin <axel.lin@ingics.com> Azael Avalos <coproscefalo@gmail.com> Babu Moger <babu.moger@netapp.com> Badari Pulavarty <pbadari@us.ibm.com> Baker Zhang <baker.zhang@gmail.com> Bala Shanmugam <bkamatch@qca.qualcomm.com> Balaji T K <balajitk@ti.com> Balakumaran Kannan <Balakumaran.Kannan@ap.sony.com> Bao Haojun <hjbao@marvell.com> Baodong Chen <chenbdchenbd...

...llhofer <AxelKoellhofer@web.de> Axel Lin <axel.lin@gmail.com> Axel Lin <axel.lin@ingics.com> Aximab <laurent.debian@gmail.com> Aydin Arik <aydin.arik@alliedtelesis.co.nz> Azael Avalos <coproscefalo@gmail.com> Babu Moger <babu.moger@netapp.com> Badari Pulavarty <pbadari@us.ibm.com> Baker Zhang <baker.zhang@gmail.com> Bala Shanmugam <bkamatch@qca.qualcomm.com> Balaji T K <balajitk@ti.com> Balakumaran Kannan <Balakumaran.Kannan@ap.sony.com> Balazs Peter Odor <balazs@obiserver.hu> Bao Haojun <hjbao...

...llhofer <AxelKoellhofer@web.de> Axel Lin <axel.lin@gmail.com> Axel Lin <axel.lin@ingics.com> Aximab <laurent.debian@gmail.com> Aydin Arik <aydin.arik@alliedtelesis.co.nz> Azael Avalos <coproscefalo@gmail.com> Babu Moger <babu.moger@netapp.com> Badari Pulavarty <pbadari@us.ibm.com> Baker Zhang <baker.zhang@gmail.com> Bala Shanmugam <bkamatch@qca.qualcomm.com> Balaji T K <balajitk@ti.com> Balakumaran Kannan <Balakumaran.Kannan@ap.sony.com> Balazs Peter Odor <balazs@obiserver.hu> Bao Haojun <hjbao...