mirror of
https://github.com/projectacrn/acrn-hypervisor.git
synced 2025-05-28 10:04:14 +00:00
a35a650f5f
Benefits of outputing trace data as raw data:
- Smaller trace data size
- More convenient to add new trace entry. There is no need to change acrntrace
when we add new trace entry to HV. All we need do is to update the analysis
scripts to deal with this situation.
Trace data size(with 1 UOS):
~57M -- with patch
~137M -- without patch
Signed-off-by: Kaige Fu <kaige.fu@intel.com>
Reviewed-by: Yan, Like <like.yan@intel.com>
Reviewed-by: Geoffroy Van Cutsem <geoffroy.vancutsem@intel.com>
82 lines
1.5 KiB
C
82 lines
1.5 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <asm/errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdbool.h>
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#include "sbuf.h"
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static inline bool sbuf_is_empty(shared_buf_t *sbuf)
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{
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return (sbuf->head == sbuf->tail);
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}
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static inline uint32_t sbuf_next_ptr(uint32_t pos,
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uint32_t span, uint32_t scope)
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{
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pos += span;
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pos = (pos >= scope) ? (pos - scope) : pos;
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return pos;
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}
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int sbuf_get(shared_buf_t *sbuf, uint8_t *data)
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{
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const void *from;
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if ((sbuf == NULL) || (data == NULL))
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return -EINVAL;
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if (sbuf_is_empty(sbuf)) {
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/* no data available */
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return 0;
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}
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from = (void *)sbuf + SBUF_HEAD_SIZE + sbuf->head;
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memcpy(data, from, sbuf->ele_size);
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sbuf->head = sbuf_next_ptr(sbuf->head, sbuf->ele_size, sbuf->size);
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return sbuf->ele_size;
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}
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int sbuf_write(int fd, shared_buf_t *sbuf)
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{
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const void *start;
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int written;
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if (sbuf == NULL)
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return -EINVAL;
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if (sbuf_is_empty(sbuf)) {
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return 0;
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}
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start = (void *)sbuf + SBUF_HEAD_SIZE + sbuf->head;
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written = write(fd, start, sbuf->ele_size);
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if ( written != sbuf->ele_size) {
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printf("Failed to write. Expect written size %d, returned %d\n",
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sbuf->ele_size, written);
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return -1;
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}
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sbuf->head = sbuf_next_ptr(sbuf->head, sbuf->ele_size, sbuf->size);
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return sbuf->ele_size;
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}
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int sbuf_clear_buffered(shared_buf_t *sbuf)
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{
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if (sbuf == NULL)
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return -EINVAL;
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sbuf->head = sbuf->tail;
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return 0;
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}
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