Index: sysutils/Makefile
===================================================================
--- sysutils/Makefile
+++ sysutils/Makefile
@@ -53,6 +53,7 @@
     SUBDIR += apcpwr
     SUBDIR += apcupsd
     SUBDIR += aptly
+    SUBDIR += arc_summary
     SUBDIR += arcconf
     SUBDIR += archey4
     SUBDIR += archivemount
Index: sysutils/arc_summary/Makefile
===================================================================
--- /dev/null
+++ sysutils/arc_summary/Makefile
@@ -0,0 +1,32 @@
+PORTNAME=	arc_summary
+PORTVERSION=	20220410
+CATEGORIES=	sysutils
+MASTER_SITES=	https://raw.githubusercontent.com/openzfs/zfs/${_REV}/cmd/
+DISTFILES=	${PORTNAME}
+DIST_SUBDIR=	${PORTNAME}_${_REV}
+
+MAINTAINER=	jrm@FreeBSD.org
+COMMENT=	Print ZFS ARC cache statistics and other information
+
+LICENSE=	BSD2CLAUSE
+
+RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}sysctl>0:devel/py-sysctl@${PY_FLAVOR}
+
+USES=		python shebangfix
+SHEBANG_FILES=	${PORTNAME}
+
+EXTRACT_CMD=	${CP}
+EXTRACT_BEFORE_ARGS=	# empty
+EXTRACT_AFTER_ARGS=	.
+NO_ARCH=	yes
+NO_BUILD=	yes
+
+NO_WRKSUBDIR=	yes
+PLIST_FILES=	bin/arc_summary
+
+_REV=		0a9aaa7f0cc16f1771f492cce665bc5c5eb8e735
+
+do-install:
+	${INSTALL_SCRIPT} ${WRKSRC}/${PORTNAME} ${STAGEDIR}${PREFIX}/bin/
+
+.include <bsd.port.mk>
Index: sysutils/arc_summary/distinfo
===================================================================
--- /dev/null
+++ sysutils/arc_summary/distinfo
@@ -0,0 +1,3 @@
+TIMESTAMP = 1654718738
+SHA256 (arc_summary_0a9aaa7f0cc16f1771f492cce665bc5c5eb8e735/arc_summary) = 6b46d2e3e3d935bf414bfbe49c82ddaa759ee5f1b75dd6dff676c17f10ffa9a2
+SIZE (arc_summary_0a9aaa7f0cc16f1771f492cce665bc5c5eb8e735/arc_summary) = 33957
Index: sysutils/arc_summary/pkg-descr
===================================================================
--- /dev/null
+++ sysutils/arc_summary/pkg-descr
@@ -0,0 +1,6 @@
+arc_summary provides basic information on the ZFS ARC, its efficiency,
+the L2ARC (if present), the Data Management Unit (DMU), Virtual Devices
+(VDEVs), and tunables. See the in-source documentation and code at
+https://github.com/openzfs/zfs/blob/master/module/zfs/arc.c for details.
+The original introduction to arc_summary can be found at
+http://cuddletech.com/?p=454