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Sumit6307
b2b78d2f8a
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This adds a kernel-level performance profiler for the VFS. By enabling CONFIG_FS_PROFILER, the core VFS system calls (file_read, file_write, file_open, and file_close) are instrumented to track high-resolution execution times using clock_systime_timespec() seamlessly. The collected statistics are exposed dynamically via a new procfs node at /proc/fs/profile, allowing CI regression testing without needing external debugging tools. Signed-off-by: Sumit6307 <sumitkesar6307@gmail.com>
56 lines
2.0 KiB
C
56 lines
2.0 KiB
C
/****************************************************************************
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* fs/vfs/fs_profile.c
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/clock.h>
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#include <nuttx/atomic.h>
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#include "vfs.h"
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/****************************************************************************
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* Public Data
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****************************************************************************/
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struct fs_profile_s g_fs_profile;
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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void fs_profile_start(FAR clock_t *start)
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{
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*start = perf_gettime();
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}
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void fs_profile_stop(FAR clock_t *start, FAR atomic64_t *total,
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FAR atomic_t *count)
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{
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clock_t stop = perf_gettime();
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clock_t delta = stop - *start;
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atomic64_fetch_add(total, delta);
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atomic_fetch_add(count, 1);
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}
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