| Message ID | 20170804053511.2389-1-paolo.valente@linaro.org |
|---|---|
| Headers | show |
| Series | block, bfq: improve and refactor throughput-boosting logic | expand |
> Il giorno 04 ago 2017, alle ore 07:35, Paolo Valente <paolo.valente@linaro.org> ha scritto: > > Hi, > these two patches improve throughput-boosting logic in two > aspects. The first patch refactors the parts of the device-idling > logic, related to throughput boosting, that are still scattered across > the source file bfq-iosched.c. The patch concetrates all the logic in > one function. The second patch fixes/improves device idling for > flash-based devices that have no internal queueing of I/O requests. > > The contribution in the first patch has been triggered by that in the > second patch: finding the change made by the second patch has been > more difficult than it had to be, because the logic that decides > whether to idle the device is scattered across three functions. > > The second patch provides a significant throghput boost, for random > I/O with flash-based non-queueing devices. For example, on a HiKey > board, throughput increases by up to 125%, growing, e.g., from 6.9MB/s > to 15.6MB/s with two or three random readers in parallel. > Hi Jens, any idea about the fate of these two patches? Thanks, Paolo > Thanks, > Paolo > > Paolo Valente (2): > block,bfq: refactor device-idling logic > block, bfq: boost throughput with flash-based non-queueing devices > > block/bfq-iosched.c | 144 ++++++++++++++++++++++++++++------------------------ > block/bfq-iosched.h | 12 ++--- > 2 files changed, 85 insertions(+), 71 deletions(-) > > -- > 2.10.0
On 08/10/2017 01:55 PM, Paolo Valente wrote: > >> Il giorno 04 ago 2017, alle ore 07:35, Paolo Valente <paolo.valente@linaro.org> ha scritto: >> >> Hi, >> these two patches improve throughput-boosting logic in two >> aspects. The first patch refactors the parts of the device-idling >> logic, related to throughput boosting, that are still scattered across >> the source file bfq-iosched.c. The patch concetrates all the logic in >> one function. The second patch fixes/improves device idling for >> flash-based devices that have no internal queueing of I/O requests. >> >> The contribution in the first patch has been triggered by that in the >> second patch: finding the change made by the second patch has been >> more difficult than it had to be, because the logic that decides >> whether to idle the device is scattered across three functions. >> >> The second patch provides a significant throghput boost, for random >> I/O with flash-based non-queueing devices. For example, on a HiKey >> board, throughput increases by up to 125%, growing, e.g., from 6.9MB/s >> to 15.6MB/s with two or three random readers in parallel. >> > > Hi Jens, > any idea about the fate of these two patches? Queued up for 4.14. -- Jens Axboe