Re: [libvirt] [PATCHv2 3/6] virNodeGetCPUTime: Implement public API

virNodeGetCPUTime: Implement public API Signed-off-by: Minoru Usui <usui(a)mxm.nes.nec.co.jp&gt; --- src/libvirt.c | 70 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 70 insertions(+), 0 deletions(-) diff --git a/src/libvirt.c b/src/libvirt.c index 8be18d4..a65bfc6 100644 --- a/src/libvirt.c +++ b/src/libvirt.c @@ -4260,6 +4260,76 @@ error: } /** + * virNodeGetCpuTime: + * @stats: nr_stats-sized array of stat structures (returned) + * @nr_stats: number of cpu time statistics requested of the node. + * @flags: unused, always pass 0 + * + * This function provides cpu time statistics of the node. + * + * Up to 'nr_stats' elements of 'stats' will be populated with cpu time statistics + * of the node. Only statistics supported by the driver, and this version of + * libvirt will be returned. + * + * Cpu time Statistics: + * + * VIR_NODE_CPU_TIME_KERNEL: + * The cumulative CPU time which spends by kernel, + * when the node booting up.(nanoseconds) + * VIR_NODE_CPU_TIME_USER: + * The cumulative CPU time which spends by user processes, + * when the node booting up.(nanoseconds) + * VIR_NODE_CPU_TIME_IDLE: + * The cumulative idle CPU time, when the node booting up.(nanoseconds) + * VIR_NODE_CPU_TIME_IOWAIT: + * The cumulative I/O wait CPU time, when the node booting up.(nanoseconds) + * VIR_NODE_CPU_TIME_UTILIZATION: + * The CPU utilization. The usage value is in percent and 100% + * represents all CPUs on the server. + * + * Returns: The number of stats provided or -1 in case of failure. + */ +int virNodeGetCpuTime (virConnectPtr conn, virNodeCpuTimePtr stats, + unsigned int nr_stats, unsigned int flags) +{ + unsigned long nr_stats_ret = 0;

+ + VIR_DEBUG("conn=%p, stats=%p, nr_stats=%u", conn, stats, nr_stats); + + virResetLastError(); + + if (!VIR_IS_CONNECT (conn)) { + virLibConnError(VIR_ERR_INVALID_CONN, __FUNCTION__); + virDispatchError(NULL); + return 0; + } + + if (flags != 0) { + virLibConnError(VIR_ERR_INVALID_ARG, _("flags must be zero")); + goto error; + }

+ if (!stats || nr_stats == 0) + return 0; + + if (nr_stats > VIR_NODE_CPU_TIME_NR) + nr_stats = VIR_NODE_CPU_TIME_NR;

+ + if (conn->driver->nodeGetCpuTime) { + nr_stats_ret = conn->driver->nodeGetCpuTime (conn, stats, nr_stats, flags); + if (nr_stats_ret == -1) + goto error; + return nr_stats_ret; + } + + virLibConnError(VIR_ERR_NO_SUPPORT, __FUNCTION__); + +error: + virDispatchError(conn); + return -1; +} + +/**