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| /freebsd-10.0-release/sys/vm/ | ||
| H A D | uma.h | diff 147996 Thu Jul 14 14:35:13 MDT 2005 rwatson Introduce a new sysctl, vm.zone_stats, which exports UMA(9) allocator statistics via a binary structure stream: - Add structure 'uma_stream_header', which defines a stream version, definition of MAXCPUs used in the stream, and the number of zone records in the stream. - Add structure 'uma_type_header', which defines the name, alignment, size, resource allocation limits, current pages allocated, preferred bucket size, and central zone + keg statistics. - Add structure 'uma_percpu_stat', which, for each per-CPU cache, includes the number of allocations and frees, as well as the number of free items in the cache. - When the sysctl is queried, return a stream header, followed by a series of type descriptions, each consisting of a type header followed by a series of MAXCPUs uma_percpu_stat structures holding per-CPU allocation information. Typical values of MAXCPU will be 1 (UP compiled kernel) and 16 (SMP compiled kernel). This query mechanism allows user space monitoring tools to extract memory allocation statistics in a machine-readable form, and to do so at a per-CPU granularity, allowing monitoring of allocation patterns across CPUs in order to better understand the distribution of work and memory flow over multiple CPUs. While here, also export the number of UMA zones as a sysctl vm.uma_count, in order to assist in sizing user swpace buffers to receive the stream. A follow-up commit of libmemstat(3), a library to monitor kernel memory allocation, will occur in the next few days. This change directly supports converting netstat(1)'s "-mb" mode to using UMA-sourced stats rather than separately maintained mbuf allocator statistics. MFC after: 1 week |
| H A D | uma_int.h | diff 147996 Thu Jul 14 14:35:13 MDT 2005 rwatson Introduce a new sysctl, vm.zone_stats, which exports UMA(9) allocator statistics via a binary structure stream: - Add structure 'uma_stream_header', which defines a stream version, definition of MAXCPUs used in the stream, and the number of zone records in the stream. - Add structure 'uma_type_header', which defines the name, alignment, size, resource allocation limits, current pages allocated, preferred bucket size, and central zone + keg statistics. - Add structure 'uma_percpu_stat', which, for each per-CPU cache, includes the number of allocations and frees, as well as the number of free items in the cache. - When the sysctl is queried, return a stream header, followed by a series of type descriptions, each consisting of a type header followed by a series of MAXCPUs uma_percpu_stat structures holding per-CPU allocation information. Typical values of MAXCPU will be 1 (UP compiled kernel) and 16 (SMP compiled kernel). This query mechanism allows user space monitoring tools to extract memory allocation statistics in a machine-readable form, and to do so at a per-CPU granularity, allowing monitoring of allocation patterns across CPUs in order to better understand the distribution of work and memory flow over multiple CPUs. While here, also export the number of UMA zones as a sysctl vm.uma_count, in order to assist in sizing user swpace buffers to receive the stream. A follow-up commit of libmemstat(3), a library to monitor kernel memory allocation, will occur in the next few days. This change directly supports converting netstat(1)'s "-mb" mode to using UMA-sourced stats rather than separately maintained mbuf allocator statistics. MFC after: 1 week |
| H A D | uma_core.c | diff 147996 Thu Jul 14 14:35:13 MDT 2005 rwatson Introduce a new sysctl, vm.zone_stats, which exports UMA(9) allocator statistics via a binary structure stream: - Add structure 'uma_stream_header', which defines a stream version, definition of MAXCPUs used in the stream, and the number of zone records in the stream. - Add structure 'uma_type_header', which defines the name, alignment, size, resource allocation limits, current pages allocated, preferred bucket size, and central zone + keg statistics. - Add structure 'uma_percpu_stat', which, for each per-CPU cache, includes the number of allocations and frees, as well as the number of free items in the cache. - When the sysctl is queried, return a stream header, followed by a series of type descriptions, each consisting of a type header followed by a series of MAXCPUs uma_percpu_stat structures holding per-CPU allocation information. Typical values of MAXCPU will be 1 (UP compiled kernel) and 16 (SMP compiled kernel). This query mechanism allows user space monitoring tools to extract memory allocation statistics in a machine-readable form, and to do so at a per-CPU granularity, allowing monitoring of allocation patterns across CPUs in order to better understand the distribution of work and memory flow over multiple CPUs. While here, also export the number of UMA zones as a sysctl vm.uma_count, in order to assist in sizing user swpace buffers to receive the stream. A follow-up commit of libmemstat(3), a library to monitor kernel memory allocation, will occur in the next few days. This change directly supports converting netstat(1)'s "-mb" mode to using UMA-sourced stats rather than separately maintained mbuf allocator statistics. MFC after: 1 week |
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