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Wed, 24 Aug 2022 06:28:06 -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 , Wei Liu , Anthony PERARD Subject: [RFC PATCH v1 2/2] tools/misc: Add xen-vcpus-stats tool Date: Wed, 24 Aug 2022 15:27:31 +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: 1661347712703100003 Content-Type: text/plain; charset="utf-8" Add a demostration tool that uses the stats_table resource to query vcpus' RUNSTATE_running counter for a DomU. Signed-off-by: Matias Ezequiel Vara Larsen --- Changes in v1: - change the name of the tool to xen-vcpus-stats - set command line parameters in the same order that are passed - remove header libs.h - build by default - remove errno, strerrno, "\n", and identation - use errx when errno is not needed - address better the number of pages requested and error msgs - use the shared_vcpustatspage_t structure - use the correct frame id when requesting the resource --- tools/misc/Makefile | 6 +++ tools/misc/xen-vcpus-stats.c | 76 ++++++++++++++++++++++++++++++++++++ 2 files changed, 82 insertions(+) create mode 100644 tools/misc/xen-vcpus-stats.c diff --git a/tools/misc/Makefile b/tools/misc/Makefile index 2b683819d4..837e4b50da 100644 --- a/tools/misc/Makefile +++ b/tools/misc/Makefile @@ -49,6 +49,7 @@ TARGETS_COPY +=3D xenpvnetboot =20 # Everything which needs to be built TARGETS_BUILD :=3D $(filter-out $(TARGETS_COPY),$(TARGETS_ALL)) +TARGETS_BUILD +=3D xen-vcpus-stats =20 # ... including build-only targets TARGETS_BUILD-$(CONFIG_X86) +=3D xen-vmtrace @@ -135,4 +136,9 @@ xencov: xencov.o xen-ucode: xen-ucode.o $(CC) $(LDFLAGS) -o $@ $< $(LDLIBS_libxenctrl) $(APPEND_LDFLAGS) =20 +xen-vcpus-stats.o: CFLAGS +=3D $(CFLAGS_libxenforeginmemory) + +xen-vcpus-stats: xen-vcpus-stats.o + $(CC) $(LDFLAGS) -o $@ $< $(LDLIBS_libxenctrl) $(LDLIBS_libxenforeignmemo= ry) $(APPEND_LDFLAGS) + -include $(DEPS_INCLUDE) diff --git a/tools/misc/xen-vcpus-stats.c b/tools/misc/xen-vcpus-stats.c new file mode 100644 index 0000000000..d56d1493e4 --- /dev/null +++ b/tools/misc/xen-vcpus-stats.c @@ -0,0 +1,76 @@ +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +static sig_atomic_t interrupted; +static void close_handler(int signum) +{ + interrupted =3D 1; +} + +int main(int argc, char **argv) +{ + xenforeignmemory_handle *fh; + xenforeignmemory_resource_handle *res; + size_t size; + int rc, domid, frec, vcpu; + shared_vcpustatspage_t * info; + struct sigaction act; + + if (argc !=3D 4 ) { + fprintf(stderr, "Usage: %s \n", argv[0]); + return 1; + } + + domid =3D atoi(argv[1]); + vcpu =3D atoi(argv[2]); + frec =3D atoi(argv[3]); + + act.sa_handler =3D close_handler; + act.sa_flags =3D 0; + sigemptyset(&act.sa_mask); + sigaction(SIGHUP, &act, NULL); + sigaction(SIGTERM, &act, NULL); + sigaction(SIGINT, &act, NULL); + sigaction(SIGALRM, &act, NULL); + + fh =3D xenforeignmemory_open(NULL, 0); + + if ( !fh ) + err(1, "xenforeignmemory_open"); + + rc =3D xenforeignmemory_resource_size( + fh, domid, XENMEM_resource_stats_table, + 0, &size); + + if ( rc ) + err(1, "Fail: Get size"); + + res =3D xenforeignmemory_map_resource( + fh, domid, XENMEM_resource_stats_table, + 0, XENMEM_resource_stats_frame_vcpustats, size >> XC_PAGE_SHIFT, + (void **)&info, PROT_READ, 0); + + if ( !res ) + err(1, "Fail: Map"); + + while ( !interrupted ) { + sleep(frec); + printf("running cpu_time: %ld\n", info->vcpu_info[vcpu].runstate_r= unning_time); + } + + rc =3D xenforeignmemory_unmap_resource(fh, res); + if ( rc ) + err(1, "Fail: Unmap"); + + return 0; +} --=20 2.25.1