Much like the alloc_report() function can be useful to report on
object allocation statistics while debugging the new pack_report()
function can be useful to report on the behavior of the mmap window
code used for packfile access.
Signed-off-by: Shawn O. Pearce <spearce@xxxxxxxxxxx>
---
cache.h | 1 +
sha1_file.c | 31 +++++++++++++++++++++++++++++++
2 files changed, 32 insertions(+), 0 deletions(-)
diff --git a/cache.h b/cache.h
index b7855ef..bd73aab 100644
--- a/cache.h
+++ b/cache.h
@@ -398,6 +398,7 @@ extern void install_packed_git(struct packed_git *pack);
extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
struct packed_git *packs);
+extern void pack_report();
extern unsigned char* use_pack(struct packed_git *, struct pack_window **, unsigned long, unsigned int *);
extern void unuse_pack(struct pack_window **);
extern struct packed_git *add_packed_git(char *, int, int);
diff --git a/sha1_file.c b/sha1_file.c
index a8a6c10..1a87f95 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -398,10 +398,34 @@ static char *find_sha1_file(const unsigned char *sha1, struct stat *st)
}
static unsigned int pack_used_ctr;
+static unsigned int pack_mmap_calls;
+static unsigned int peak_pack_open_windows;
+static unsigned int pack_open_windows;
+static size_t peak_pack_mapped;
static size_t pack_mapped;
static size_t page_size;
struct packed_git *packed_git;
+void pack_report()
+{
+ fprintf(stderr,
+ "pack_report: getpagesize() = %10lu\n"
+ "pack_report: core.packedGitWindowSize = %10lu\n"
+ "pack_report: core.packedGitLimit = %10lu\n",
+ page_size,
+ packed_git_window_size,
+ packed_git_limit);
+ fprintf(stderr,
+ "pack_report: pack_used_ctr = %10u\n"
+ "pack_report: pack_mmap_calls = %10u\n"
+ "pack_report: pack_open_windows = %10u / %10u\n"
+ "pack_report: pack_mapped = %10lu / %10lu\n",
+ pack_used_ctr,
+ pack_mmap_calls,
+ pack_open_windows, peak_pack_open_windows,
+ pack_mapped, peak_pack_mapped);
+}
+
static int check_packed_git_idx(const char *path, unsigned long *idx_size_,
void **idx_map_)
{
@@ -492,6 +516,7 @@ static int unuse_one_window(struct packed_git *current)
}
}
free(lru_w);
+ pack_open_windows--;
return 1;
}
return 0;
@@ -605,6 +630,12 @@ unsigned char* use_pack(struct packed_git *p,
die("packfile %s cannot be mapped: %s",
p->pack_name,
strerror(errno));
+ pack_mmap_calls++;
+ pack_open_windows++;
+ if (pack_mapped > peak_pack_mapped)
+ peak_pack_mapped = pack_mapped;
+ if (pack_open_windows > peak_pack_open_windows)
+ peak_pack_open_windows = pack_open_windows;
win->next = p->windows;
p->windows = win;
}
--
1.4.4.3.g87d8
-
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