140 lines
3.8 KiB
Diff
140 lines
3.8 KiB
Diff
From 0e3c6791fe9788e8f170818787bbdf609297da7d Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= <berrange@redhat.com>
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Date: Mon, 2 Dec 2024 12:19:27 +0000
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Subject: [PATCH 2/2] qga: implement a 'guest-get-load' command
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Konstantin Kostiuk <None>
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RH-MergeRequest: 434: RHEL-83000: qga: implement a 'guest-get-load' command
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RH-Jira: RHEL-83000
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RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
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RH-Acked-by: Daniel P. Berrangé <berrange@redhat.com>
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RH-Commit: [1/1] ad1d374a9e2200e0e36727e3484b96e9675bd0e4
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Provide a way to report the process load average, via a new
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'guest-get-load' command.
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This is only implemented for POSIX platforms providing 'getloadavg'.
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Example illustrated with qmp-shell:
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(QEMU) guest-get-load
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{
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"return": {
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"load15m": 1.546875,
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"load1m": 1.669921875,
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"load5m": 1.9306640625
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}
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}
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Windows has no native equivalent API, but it would be possible to
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simulate it as illustrated here (BSD-3-Clause):
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https://github.com/giampaolo/psutil/pull/1485
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This is left as an exercise for future contributors.
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Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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Reviewed-by: Konstantin Kostiuk <kkostiuk@redhat.com>
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Message-ID: <20241202121927.864335-1-berrange@redhat.com>
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Signed-off-by: Konstantin Kostiuk <kkostiuk@redhat.com>
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---
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meson.build | 1 +
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qga/commands-posix.c | 20 ++++++++++++++++++++
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qga/qapi-schema.json | 37 +++++++++++++++++++++++++++++++++++++
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3 files changed, 58 insertions(+)
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diff --git a/meson.build b/meson.build
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index b3529aa0e1..1dd97c6f49 100644
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--- a/meson.build
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+++ b/meson.build
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@@ -2497,6 +2497,7 @@ config_host_data.set('CONFIG_SETNS', cc.has_function('setns') and cc.has_functio
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config_host_data.set('CONFIG_SYNCFS', cc.has_function('syncfs'))
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config_host_data.set('CONFIG_SYNC_FILE_RANGE', cc.has_function('sync_file_range'))
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config_host_data.set('CONFIG_TIMERFD', cc.has_function('timerfd_create'))
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+config_host_data.set('CONFIG_GETLOADAVG', cc.has_function('getloadavg'))
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config_host_data.set('HAVE_COPY_FILE_RANGE', cc.has_function('copy_file_range'))
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config_host_data.set('HAVE_GETIFADDRS', cc.has_function('getifaddrs'))
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config_host_data.set('HAVE_GLIB_WITH_SLICE_ALLOCATOR', glib_has_gslice)
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diff --git a/qga/commands-posix.c b/qga/commands-posix.c
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index 49e40f9127..abfa53d6e9 100644
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--- a/qga/commands-posix.c
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+++ b/qga/commands-posix.c
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@@ -1371,3 +1371,23 @@ char *qga_get_host_name(Error **errp)
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return g_steal_pointer(&hostname);
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}
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+
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+#ifdef CONFIG_GETLOADAVG
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+GuestLoadAverage *qmp_guest_get_load(Error **errp)
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+{
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+ double loadavg[3];
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+ GuestLoadAverage *ret = NULL;
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+
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+ if (getloadavg(loadavg, G_N_ELEMENTS(loadavg)) < 0) {
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+ error_setg_errno(errp, errno,
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+ "cannot query load average");
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+ return NULL;
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+ }
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+
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+ ret = g_new0(GuestLoadAverage, 1);
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+ ret->load1m = loadavg[0];
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+ ret->load5m = loadavg[1];
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+ ret->load15m = loadavg[2];
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+ return ret;
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+}
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+#endif
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diff --git a/qga/qapi-schema.json b/qga/qapi-schema.json
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index 495706cf73..739f008ff2 100644
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--- a/qga/qapi-schema.json
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+++ b/qga/qapi-schema.json
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@@ -1852,6 +1852,43 @@
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'if': 'CONFIG_LINUX'
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}
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+
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+##
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+# @GuestLoadAverage:
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+#
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+# Statistics about process load information
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+#
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+# @load1m: 1-minute load avage
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+#
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+# @load5m: 5-minute load avage
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+#
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+# @load15m: 15-minute load avage
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+#
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+# Since: 10.0
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+##
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+{ 'struct': 'GuestLoadAverage',
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+ 'data': {
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+ 'load1m': 'number',
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+ 'load5m': 'number',
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+ 'load15m': 'number'
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+ },
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+ 'if': 'CONFIG_GETLOADAVG'
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+}
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+
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+##
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+# @guest-get-load:
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+#
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+# Retrieve CPU process load information
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+#
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+# Returns: load information
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+#
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+# Since: 10.0
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+##
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+{ 'command': 'guest-get-load',
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+ 'returns': 'GuestLoadAverage',
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+ 'if': 'CONFIG_GETLOADAVG'
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+}
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+
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##
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# @GuestNetworkRoute:
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#
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--
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2.48.1
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