diff options
| -rw-r--r-- | mincore.c | 30 | ||||
| -rw-r--r-- | pcu-mincore.1.txt | 9 |
2 files changed, 31 insertions, 8 deletions
@@ -1,8 +1,10 @@ #include "compat-util.h" +static int summary; static int usage(const char * argv0) { - fprintf(stderr, "Usage: %s [-o OFFSET] [-l LENGTH] FILE...\n", argv0); + fprintf(stderr, + "Usage: %s [-o OFFSET] [-l LENGTH] [-s] FILE...\n", argv0); return 1; } @@ -57,10 +59,19 @@ static void mincore_stats(const char *path, off_t offset, off_t len) goto err_munmap; } - for (i = 0; i < vec_len; ++i) - printf(fmt, path, - (unsigned long)((page_size() * i) + map_offset), - vec[i] & 1); + if (summary) { + size_t n = 0; + + for (i = 0; i < vec_len; ++i) + if (vec[i] & 1) + ++n; + printf("%s: %F\n", path, (double)n / (double)vec_len); + } else { + for (i = 0; i < vec_len; ++i) + printf(fmt, path, + (unsigned long)((page_size() * i) + map_offset), + vec[i] & 1); + } err_munmap: munmap(map, map_len); err_free: @@ -76,12 +87,13 @@ int main(int argc, char * const argv[]) int argi = 1; int opt; - while ((opt = getopt(argc, argv, "o:l:h")) != -1) { + while ((opt = getopt(argc, argv, "o:l:hs")) != -1) { char *err; - argi += 2; + ++argi; switch(opt) { case 'o': + ++argi; offset = cstr_to_off_t(optarg, &err, 10); if (*err || offset < 0) { fprintf(stderr, "offset must be >= 0\n"); @@ -89,12 +101,16 @@ int main(int argc, char * const argv[]) } break; case 'l': + ++argi; len = cstr_to_off_t(optarg, &err, 10); if (*err || len < 0) { fprintf(stderr, "length must be >= 0\n"); return 1; } break; + case 's': + summary = 1; + break; default: return usage(argv[0]); } diff --git a/pcu-mincore.1.txt b/pcu-mincore.1.txt index a3a8300..e0d9075 100644 --- a/pcu-mincore.1.txt +++ b/pcu-mincore.1.txt @@ -6,7 +6,7 @@ pcu-mincore - shows cache status for given files # SYNOPSIS -pcu-mincore [-o OFFSET] [-l LENGTH] FILE... +pcu-mincore [-o OFFSET] [-l LENGTH] [-s] FILE... # DESCRIPTION A command-line interface to the mincore(2) syscall to inspect @@ -24,7 +24,14 @@ resident memory. This length is rounded up next page offset. The default is to scan the entire file. +-s +: Display the summary output as a floating point number between + 0.0 and 1.0 representing the percentage of the file in core. + # OUTPUT +The following output is displayed unless "-s" summary format +is chosen. + One line for every page scanned in the following format: \<filename\>: \<offset\> \<incore\> |