##// END OF EJS Templates
perf: benchmark command for revlog indexes...
perf: benchmark command for revlog indexes We didn't have explicit microbenchmark coverage for loading revlog indexes. That seems like a useful thing to have, so let's add it. We currently measure the low-level nodemap APIs. There is room to hook in at the actual revlog layer. This could be done as a follow-up. The hackiest thing about this patch is specifying revlog paths. Other commands have arguments that allow resolution of changelog, manifest, and filelog. I needed to hook in at a lower level of the revlog API than what the existing helper functions to resolve revlogs allowed. I was too lazy to write some new APIs. This could be done as a follow-up easily enough. Example output for `hg perfrevlogindex 00changelog.i` on my Firefox repo (404418 revisions): ! revlog constructor ! wall 0.003106 comb 0.000000 user 0.000000 sys 0.000000 (best of 912) ! read ! wall 0.003077 comb 0.000000 user 0.000000 sys 0.000000 (best of 924) ! create index object ! wall 0.000000 comb 0.000000 user 0.000000 sys 0.000000 (best of 1803994) ! retrieve index entry for rev 0 ! wall 0.000193 comb 0.000000 user 0.000000 sys 0.000000 (best of 14037) ! look up missing node ! wall 0.003313 comb 0.000000 user 0.000000 sys 0.000000 (best of 865) ! look up node at rev 0 ! wall 0.003295 comb 0.010000 user 0.010000 sys 0.000000 (best of 858) ! look up node at 1/4 len ! wall 0.002598 comb 0.010000 user 0.010000 sys 0.000000 (best of 1103) ! look up node at 1/2 len ! wall 0.001909 comb 0.000000 user 0.000000 sys 0.000000 (best of 1507) ! look up node at 3/4 len ! wall 0.001213 comb 0.000000 user 0.000000 sys 0.000000 (best of 2275) ! look up node at tip ! wall 0.000453 comb 0.000000 user 0.000000 sys 0.000000 (best of 5697) ! look up all nodes (forward) ! wall 0.094615 comb 0.100000 user 0.100000 sys 0.000000 (best of 100) ! look up all nodes (reverse) ! wall 0.045889 comb 0.050000 user 0.050000 sys 0.000000 (best of 100) ! retrieve all index entries (forward) ! wall 0.078398 comb 0.080000 user 0.060000 sys 0.020000 (best of 100) ! retrieve all index entries (reverse) ! wall 0.079376 comb 0.080000 user 0.070000 sys 0.010000 (best of 100)

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osutilbuild.py
102 lines | 2.4 KiB | text/x-python | PythonLexer
from __future__ import absolute_import
import cffi
ffi = cffi.FFI()
ffi.set_source("mercurial.cffi._osutil", """
#include <sys/attr.h>
#include <sys/vnode.h>
#include <unistd.h>
#include <fcntl.h>
#include <time.h>
typedef struct val_attrs {
uint32_t length;
attribute_set_t returned;
attrreference_t name_info;
fsobj_type_t obj_type;
struct timespec mtime;
uint32_t accessmask;
off_t datalength;
} __attribute__((aligned(4), packed)) val_attrs_t;
""", include_dirs=['mercurial'])
ffi.cdef('''
typedef uint32_t attrgroup_t;
typedef struct attrlist {
uint16_t bitmapcount; /* number of attr. bit sets in list */
uint16_t reserved; /* (to maintain 4-byte alignment) */
attrgroup_t commonattr; /* common attribute group */
attrgroup_t volattr; /* volume attribute group */
attrgroup_t dirattr; /* directory attribute group */
attrgroup_t fileattr; /* file attribute group */
attrgroup_t forkattr; /* fork attribute group */
...;
};
typedef struct attribute_set {
...;
} attribute_set_t;
typedef struct attrreference {
int attr_dataoffset;
int attr_length;
...;
} attrreference_t;
typedef int ... off_t;
typedef struct val_attrs {
uint32_t length;
attribute_set_t returned;
attrreference_t name_info;
uint32_t obj_type;
struct timespec mtime;
uint32_t accessmask;
off_t datalength;
...;
} val_attrs_t;
/* the exact layout of the above struct will be figured out during build time */
typedef int ... time_t;
typedef struct timespec {
time_t tv_sec;
...;
};
int getattrlist(const char* path, struct attrlist * attrList, void * attrBuf,
size_t attrBufSize, unsigned int options);
int getattrlistbulk(int dirfd, struct attrlist * attrList, void * attrBuf,
size_t attrBufSize, uint64_t options);
#define ATTR_BIT_MAP_COUNT ...
#define ATTR_CMN_NAME ...
#define ATTR_CMN_OBJTYPE ...
#define ATTR_CMN_MODTIME ...
#define ATTR_CMN_ACCESSMASK ...
#define ATTR_CMN_ERROR ...
#define ATTR_CMN_RETURNED_ATTRS ...
#define ATTR_FILE_DATALENGTH ...
#define VREG ...
#define VDIR ...
#define VLNK ...
#define VBLK ...
#define VCHR ...
#define VFIFO ...
#define VSOCK ...
#define S_IFMT ...
int open(const char *path, int oflag, int perm);
int close(int);
#define O_RDONLY ...
''')
if __name__ == '__main__':
ffi.compile()