Date: Wed, 10 Oct 2012 23:28:58 +0000 (UTC) From: Jim Harris <jimharris@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r241433 - head/sys/dev/nvme Message-ID: <201210102328.q9ANSwn0020974@svn.freebsd.org>
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Author: jimharris Date: Wed Oct 10 23:28:58 2012 New Revision: 241433 URL: http://svn.freebsd.org/changeset/base/241433 Log: Put the nvme_qpair mutex on its own cacheline. Sponsored by: Intel Modified: head/sys/dev/nvme/nvme_private.h Modified: head/sys/dev/nvme/nvme_private.h ============================================================================== --- head/sys/dev/nvme/nvme_private.h Wed Oct 10 22:02:11 2012 (r241432) +++ head/sys/dev/nvme/nvme_private.h Wed Oct 10 23:28:58 2012 (r241433) @@ -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 {
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