Warner Losh 83581511d9 nvme: Use adaptive spinning when polling for completion or state change ... We only use nvme_completion_poll in the initialization path. The commands they queue and wait for finish quickly as they involve no I/O to the drive's media. These command take about 20-200 microsecnds each. Set the wait time to 1us and then increase it by 1.5 each successive iteration (max 1ms). This reduces initialization time by 80ms in cpervica's tests. Use this same technique waiting for RDY state transitions. This saves another 20ms. In total we're down from ~330ms to ~2ms. Tested by: cperciva Sponsored by: Netflix Reviewed by: mav Differential Review: https://reviews.freebsd.org/D32259		2021-10-01 19:17:55 -06:00
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nvme.c	nvme: use config_intrhook_drain to avoid removable card races	2021-03-11 09:45:10 -07:00
nvme.h	nvme: Fix alignment on nvme structures	2021-07-02 16:05:19 -06:00
nvme_ahci.c	nvme(4): Add MSI and single MSI-X support.	2021-08-31 13:45:46 -04:00
nvme_ctrlr.c	nvme: Use adaptive spinning when polling for completion or state change	2021-10-01 19:17:55 -06:00
nvme_ctrlr_cmd.c	Add Host Memory Buffer support to nvme(4).	2020-01-07 21:17:11 +00:00
nvme_ns.c	nvme(4): Report NPWA before NPWG as stripesize.	2021-07-05 23:13:15 -04:00
nvme_ns_cmd.c	Add a brief comment explaining why we can return ETIMEDOUT from the call to the	2019-09-02 17:10:46 +00:00
nvme_pci.c	nvme(4): Add MSI and single MSI-X support.	2021-08-31 13:45:46 -04:00
nvme_private.h	nvme: Use adaptive spinning when polling for completion or state change	2021-10-01 19:17:55 -06:00
nvme_qpair.c	nvme: Sanity check completion id	2021-09-28 21:21:50 -06:00
nvme_sim.c	nvme/nda: Fail all nvme I/Os after controller fails	2021-09-17 16:09:21 -06:00
nvme_sysctl.c	nvme: count number of ignored interrupts	2021-09-28 21:18:00 -06:00
nvme_test.c	nvme: clean up empty lines in .c and .h files	2020-09-01 22:03:10 +00:00
nvme_util.c	nvme: clean up empty lines in .c and .h files	2020-09-01 22:03:10 +00:00