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[90.87.156.131]) by smtp.gmail.com with ESMTPSA id f21-20020a7bcd15000000b003942a244f30sm2544884wmj.9.2022.05.17.07.33.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 May 2022 07:33:34 -0700 (PDT) X-Outflank-Mailman: Message body and most headers restored to incoming version X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 5534f158-d5ee-11ec-bd2c-47488cf2e6aa DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=l4FmmyqLRGvXYMIUa3VVLSfEZOS+ge14yndz9u2uerk=; b=IS5MuXI3qTk9KdMKhqyLjBHPVSrMbj2lq9dkP7aZ7vmpTjwpb4NUhLpNSF8eRl93Z3 4VsNwupqYxWgD1qgDty7nfcR8H3aa9YObZHBMUxD7cqth+cuHw6pKvt+xBM/MAza3NCD B06IQKBD2wLhxAf/tH9ZSPYOYBGYW0xaHk6Fe5Syt40hRzsxIDqYQ616sqKvMSWhDUGV tSrKmDbAkBNLgSxR/gHY/Ay1AltSJMXB+uASi5oaR6YCYPsUuL6qIs+BBDgZoUd1h6Qr kjjRKc7Mi+reUNFQvBhyIrJVCjVe0jIDP6CvwEz6IeIaHximoQo+FouFMdZ5latBaZnw uzJg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=l4FmmyqLRGvXYMIUa3VVLSfEZOS+ge14yndz9u2uerk=; b=t2YpfVOhjpJ83qbzhlsu1FmRfFv7INA57MVEX+Dn/Ug0iDzoKUC9Sm6aLHNpaFR1vh 4OnwZlBFSVff13D/M3OWIm4EgevnhVRqO9mtelvkffh/XQYh/nTsQ3+8w2LK4lBazE27 sl35Oh9ERHFZXKIkxduNEP+AkcmSVWfLJDFHiuwdrtbc17LZelE6tldq5hZV5wFMc0ot +rmUSCURzss1hnwxXZDCWhMFHsq/Vy9rN31dTRvqLJZ38y6ymL109cFbc88SmEfDz9oZ kT0X46t7PzxmkJpokBxywUCI8XV+HIVEcmuyBojrDMJNt/BI66GfHgx+BzmpcdKv1eRp vaFQ== X-Gm-Message-State: AOAM531vblwQx7TDPThcagZXNUArxFBQbr/ZsVII0uT1kQu2gExMqj4k mfmjkBeW5bixlCucvqf8BmstcRTonSf+rA== X-Google-Smtp-Source: ABdhPJw/qHReIodTGVvX1U8v9An9YMCdZfTdwsfD+29R58e1Kpell1NJ2y3X1Szyh4jZjUdVVzEZzQ== X-Received: by 2002:adf:f152:0:b0:20d:740:beba with SMTP id y18-20020adff152000000b0020d0740bebamr10075439wro.512.1652798014404; Tue, 17 May 2022 07:33:34 -0700 (PDT) From: Matias Ezequiel Vara Larsen X-Google-Original-From: Matias Ezequiel Vara Larsen To: xen-devel@lists.xenproject.org Cc: Matias Ezequiel Vara Larsen , Andrew Cooper , George Dunlap , Jan Beulich , Julien Grall , Stefano Stabellini , Wei Liu , Dario Faggioli Subject: [RFC PATCH 1/2] xen/memory : Add stats_table resource type Date: Tue, 17 May 2022 16:33:14 +0200 Message-Id: X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1652798041703100002 Content-Type: text/plain; charset="utf-8" Allow to map vcpu stats using acquire_resource(). Signed-off-by: Matias Ezequiel Vara Larsen --- xen/common/domain.c | 42 +++++++++++++++++++++++++++++++++++++ xen/common/memory.c | 29 +++++++++++++++++++++++++ xen/common/sched/core.c | 5 +++++ xen/include/public/memory.h | 1 + xen/include/xen/sched.h | 5 +++++ 5 files changed, 82 insertions(+) diff --git a/xen/common/domain.c b/xen/common/domain.c index 17cc32fde3..ddd9f88874 100644 --- a/xen/common/domain.c +++ b/xen/common/domain.c @@ -132,6 +132,42 @@ static void vcpu_info_reset(struct vcpu *v) v->vcpu_info_mfn =3D INVALID_MFN; } =20 +static void stats_free_buffer(struct vcpu * v) +{ + struct page_info *pg =3D v->stats.pg; + + if ( !pg ) + return; + + v->stats.va =3D NULL; + + if ( v->stats.va ) + unmap_domain_page_global(v->stats.va); + + v->stats.va =3D NULL; + + free_domheap_page(pg); +} + +static int stats_alloc_buffer(struct vcpu *v) +{ + struct domain *d =3D v->domain; + struct page_info *pg; + + pg =3D alloc_domheap_page(d, MEMF_no_refcount); + + if ( !pg ) + return -ENOMEM; + + v->stats.va =3D __map_domain_page_global(pg); + if ( !v->stats.va ) + return -ENOMEM; + + v->stats.pg =3D pg; + clear_page(v->stats.va); + return 0; +} + static void vmtrace_free_buffer(struct vcpu *v) { const struct domain *d =3D v->domain; @@ -203,6 +239,9 @@ static int vmtrace_alloc_buffer(struct vcpu *v) */ static int vcpu_teardown(struct vcpu *v) { + + stats_free_buffer(v); + vmtrace_free_buffer(v); =20 return 0; @@ -269,6 +308,9 @@ struct vcpu *vcpu_create(struct domain *d, unsigned int= vcpu_id) if ( vmtrace_alloc_buffer(v) !=3D 0 ) goto fail_wq; =20 + if ( stats_alloc_buffer(v) !=3D 0 ) + goto fail_wq; + if ( arch_vcpu_create(v) !=3D 0 ) goto fail_sched; =20 diff --git a/xen/common/memory.c b/xen/common/memory.c index 297b98a562..39de6d9d05 100644 --- a/xen/common/memory.c +++ b/xen/common/memory.c @@ -1099,6 +1099,10 @@ static unsigned int resource_max_frames(const struct= domain *d, case XENMEM_resource_vmtrace_buf: return d->vmtrace_size >> PAGE_SHIFT; =20 + // WIP: to figure out the correct size of the resource + case XENMEM_resource_stats_table: + return 1; + default: return -EOPNOTSUPP; } @@ -1162,6 +1166,28 @@ static int acquire_vmtrace_buf( return nr_frames; } =20 +static int acquire_stats_table(struct domain *d, + unsigned int id, + unsigned int frame, + unsigned int nr_frames, + xen_pfn_t mfn_list[]) +{ + const struct vcpu *v =3D domain_vcpu(d, id); + mfn_t mfn; + + if ( !v ) + return -ENOENT; + + if ( !v->stats.pg ) + return -EINVAL; + + mfn =3D page_to_mfn(v->stats.pg); + mfn_list[0] =3D mfn_x(mfn); + + printk("acquire_perf_table: id: %d, nr_frames: %d, %p, domainid: %d\n"= , id, nr_frames, v->stats.pg, d->domain_id); + return 1; +} + /* * Returns -errno on error, or positive in the range [1, nr_frames] on * success. Returning less than nr_frames contitutes a request for a @@ -1182,6 +1208,9 @@ static int _acquire_resource( case XENMEM_resource_vmtrace_buf: return acquire_vmtrace_buf(d, id, frame, nr_frames, mfn_list); =20 + case XENMEM_resource_stats_table: + return acquire_stats_table(d, id, frame, nr_frames, mfn_list); + default: return -EOPNOTSUPP; } diff --git a/xen/common/sched/core.c b/xen/common/sched/core.c index 8f4b1ca10d..2a8b534977 100644 --- a/xen/common/sched/core.c +++ b/xen/common/sched/core.c @@ -264,6 +264,7 @@ static inline void vcpu_runstate_change( { s_time_t delta; struct sched_unit *unit =3D v->sched_unit; + uint64_t * runstate; =20 ASSERT(spin_is_locked(get_sched_res(v->processor)->schedule_lock)); if ( v->runstate.state =3D=3D new_state ) @@ -287,6 +288,10 @@ static inline void vcpu_runstate_change( } =20 v->runstate.state =3D new_state; + + // WIP: use a different interface + runstate =3D (uint64_t*)v->stats.va; + memcpy(runstate, &v->runstate.time[0], sizeof(v->runstate.time[0])); } =20 void sched_guest_idle(void (*idle) (void), unsigned int cpu) diff --git a/xen/include/public/memory.h b/xen/include/public/memory.h index 50e73eef98..752fd0be0f 100644 --- a/xen/include/public/memory.h +++ b/xen/include/public/memory.h @@ -626,6 +626,7 @@ struct xen_mem_acquire_resource { #define XENMEM_resource_ioreq_server 0 #define XENMEM_resource_grant_table 1 #define XENMEM_resource_vmtrace_buf 2 +#define XENMEM_resource_stats_table 3 =20 /* * IN - a type-specific resource identifier, which must be zero diff --git a/xen/include/xen/sched.h b/xen/include/xen/sched.h index 5485d08afb..bc99adea7e 100644 --- a/xen/include/xen/sched.h +++ b/xen/include/xen/sched.h @@ -284,6 +284,11 @@ struct vcpu struct page_info *pg; /* One contiguous allocation of d->vmtrace_s= ize */ } vmtrace; =20 + struct { + struct page_info *pg; + void * va; + } stats; + struct arch_vcpu arch; =20 #ifdef CONFIG_IOREQ_SERVER --=20 2.25.1