Messages in this thread | | | From | Johannes Thumshirn <> | Subject | Re: [PATCH 0/6] v4 block refcount conversion patches | Date | Fri, 20 Oct 2017 10:43:03 +0200 |
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Elena Reshetova <elena.reshetova@intel.com> writes: > Elena Reshetova (6): > block: convert bio.__bi_cnt from atomic_t to refcount_t > block: convert blk_queue_tag.refcnt from atomic_t to refcount_t > block: convert blkcg_gq.refcnt from atomic_t to refcount_t > block: convert io_context.active_ref from atomic_t to refcount_t > block: convert bsg_device.ref_count from atomic_t to refcount_t > drivers, block: convert xen_blkif.refcnt from atomic_t to refcount_t
Hi Elena,
While the bsg ref_count is cheap, do you have any numbers how the other conversions compare in performance (throughput and latency) vs atomics?
It should be quite easy to measure against a null_blk device.
Thanks a lot, Johannes
-- Johannes Thumshirn Storage jthumshirn@suse.de +49 911 74053 689 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: Felix Imendörffer, Jane Smithard, Graham Norton HRB 21284 (AG Nürnberg) Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
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