mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-12 23:56:42 +07:00
03724b2e9c
When doing long term recording and waiting for some event to snapshot on, we often only care about the last minute or so. The --switch-output command line option supports rotating the perf.data file when the size exceeds a threshold. But the disk would still be filled with unnecessary old files. Add a new option to only keep a number of rotated files, so that the disk space usage can be limited. Signed-off-by: Andi Kleen <ak@linux.intel.com> Acked-by: Jiri Olsa <jolsa@kernel.org> LPU-Reference: 20190314225002.30108-3-andi@firstfloor.org Link: https://lkml.kernel.org/n/tip-y5u2lik0ragt4vlktz6qc9ks@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
81 lines
1.8 KiB
C
81 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __PERF_DATA_H
|
|
#define __PERF_DATA_H
|
|
|
|
#include <stdbool.h>
|
|
|
|
enum perf_data_mode {
|
|
PERF_DATA_MODE_WRITE,
|
|
PERF_DATA_MODE_READ,
|
|
};
|
|
|
|
struct perf_data_file {
|
|
char *path;
|
|
int fd;
|
|
unsigned long size;
|
|
};
|
|
|
|
struct perf_data {
|
|
const char *path;
|
|
struct perf_data_file file;
|
|
bool is_pipe;
|
|
bool is_dir;
|
|
bool force;
|
|
enum perf_data_mode mode;
|
|
|
|
struct {
|
|
u64 version;
|
|
struct perf_data_file *files;
|
|
int nr;
|
|
} dir;
|
|
};
|
|
|
|
static inline bool perf_data__is_read(struct perf_data *data)
|
|
{
|
|
return data->mode == PERF_DATA_MODE_READ;
|
|
}
|
|
|
|
static inline bool perf_data__is_write(struct perf_data *data)
|
|
{
|
|
return data->mode == PERF_DATA_MODE_WRITE;
|
|
}
|
|
|
|
static inline int perf_data__is_pipe(struct perf_data *data)
|
|
{
|
|
return data->is_pipe;
|
|
}
|
|
|
|
static inline bool perf_data__is_dir(struct perf_data *data)
|
|
{
|
|
return data->is_dir;
|
|
}
|
|
|
|
static inline int perf_data__fd(struct perf_data *data)
|
|
{
|
|
return data->file.fd;
|
|
}
|
|
|
|
int perf_data__open(struct perf_data *data);
|
|
void perf_data__close(struct perf_data *data);
|
|
ssize_t perf_data__write(struct perf_data *data,
|
|
void *buf, size_t size);
|
|
ssize_t perf_data_file__write(struct perf_data_file *file,
|
|
void *buf, size_t size);
|
|
/*
|
|
* If at_exit is set, only rename current perf.data to
|
|
* perf.data.<postfix>, continue write on original data.
|
|
* Set at_exit when flushing the last output.
|
|
*
|
|
* Return value is fd of new output.
|
|
*/
|
|
int perf_data__switch(struct perf_data *data,
|
|
const char *postfix,
|
|
size_t pos, bool at_exit, char **new_filepath);
|
|
|
|
int perf_data__create_dir(struct perf_data *data, int nr);
|
|
int perf_data__open_dir(struct perf_data *data);
|
|
void perf_data__close_dir(struct perf_data *data);
|
|
int perf_data__update_dir(struct perf_data *data);
|
|
unsigned long perf_data__size(struct perf_data *data);
|
|
#endif /* __PERF_DATA_H */
|