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| author | jimharris <jimharris@FreeBSD.org> | 2012-10-10 23:28:58 +0000 |
|---|---|---|
| committer | jimharris <jimharris@FreeBSD.org> | 2012-10-10 23:28:58 +0000 |
| commit | 757271a2133e07d21f479484187385dad725323e (patch) | |
| tree | 051062c33d1a6cb48ff803314f0874ae1d530d6a | |
| parent | 37cc4ef7d0d99e89c7bf7e8385abf7b65d45e4dd (diff) | |
| download | FreeBSD-src-757271a2133e07d21f479484187385dad725323e.zip FreeBSD-src-757271a2133e07d21f479484187385dad725323e.tar.gz | |
Put the nvme_qpair mutex on its own cacheline.
Sponsored by: Intel
| -rw-r--r-- | sys/dev/nvme/nvme_private.h | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/sys/dev/nvme/nvme_private.h b/sys/dev/nvme/nvme_private.h index 667238b..ae7faf9 100644 --- a/sys/dev/nvme/nvme_private.h +++ b/sys/dev/nvme/nvme_private.h @@ -88,6 +88,10 @@ MALLOC_DECLARE(M_NVME); #define NVME_TIMEOUT_IN_SEC (30) +#ifndef CACHE_LINE_SIZE +#define CACHE_LINE_SIZE (64) +#endif + struct nvme_prp_list { uint64_t prp[NVME_MAX_PRP_LIST_ENTRIES]; SLIST_ENTRY(nvme_prp_list) slist; @@ -131,8 +135,6 @@ struct nvme_qpair { int64_t num_cmds; - struct mtx lock; - struct nvme_command *cmd; struct nvme_completion *cpl; @@ -152,7 +154,10 @@ struct nvme_qpair { struct nvme_tracker **act_tr; SLIST_HEAD(, nvme_prp_list) free_prp_list; -}; + + struct mtx lock __aligned(CACHE_LINE_SIZE); + +} __aligned(CACHE_LINE_SIZE); struct nvme_namespace { |
