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author | Jiajian Ye <yejiajian2018@email.szu.edu.cn> | 2022-04-28 23:15:57 -0700 |
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committer | akpm <akpm@linux-foundation.org> | 2022-04-28 23:15:57 -0700 |
commit | ebbeae36387ccf1326c896167872c3acf6c3c956 (patch) | |
tree | 2e0b3c34da595bf162d45e172a77e459984bd266 /tools | |
parent | 75382a2dca0e9e9e57e88b479cf537549461a934 (diff) | |
download | linux-ebbeae36387ccf1326c896167872c3acf6c3c956.tar.bz2 |
tools/vm/page_owner_sort.c: support sorting blocks by multiple keys
When viewing page owner information, we may want to sort blocks of
information by multiple keys, since one single key does not uniquely
identify a block. Therefore, following adjustments are made:
1. Add a new --sort option to support sorting blocks of information by
multiple keys.
./page_owner_sort <input> <output> --sort=<order>
./page_owner_sort <input> <output> --sort <order>
<order> is a single argument in the form of a comma-separated list,
which offers a way to specify sorting order.
Sorting syntax is [+|-]key[,[+|-]key[,...]]. The ascending or descending
order can be specified by adding the + (ascending, default) or - (descend
-ing) prefix to the key:
./page_owner_sort <input> <output> [option] --sort -key1,+key2,key3...
For example, to sort the blocks first by task command name in lexicographic
order and then by pid in ascending numerical order, use the following:
./page_owner_sort <input> <output> --sort=name,+pid
To sort the blocks first by pid in ascending order and then by timestamp
of the page when it is allocated in descending order, use the following:
./page_owner_sort <input> <output> --sort=pid,-alloc_ts
2. Add explanations of a newly added --sort option in the function usage()
and the document(Documentation/vm/page_owner.rst).
This work is coauthored by
Yixuan Cao
Shenghong Han
Yinan Zhang
Chongxi Zhao
Yuhong Feng
Yongqiang Liu
Link: https://lkml.kernel.org/r/20220401024856.767-3-yejiajian2018@email.szu.edu.cn
Signed-off-by: Jiajian Ye <yejiajian2018@email.szu.edu.cn>
Cc: Chongxi Zhao <zhaochongxi2019@email.szu.edu.cn>
Cc: Shenghong Han <hanshenghong2019@email.szu.edu.cn>
Cc: Yinan Zhang <zhangyinan2019@email.szu.edu.cn>
Cc: Yixuan Cao <caoyixuan2019@email.szu.edu.cn>
Cc: Yongqiang Liu <liuyongqiang13@huawei.com>
Cc: Yuhong Feng <yuhongf@szu.edu.cn>
Cc: Haowen Bai <baihaowen@meizu.com>
Cc: Sean Anderson <seanga2@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'tools')
-rw-r--r-- | tools/vm/page_owner_sort.c | 164 |
1 files changed, 142 insertions, 22 deletions
diff --git a/tools/vm/page_owner_sort.c b/tools/vm/page_owner_sort.c index 16fb034c6a4e..beca990707fb 100644 --- a/tools/vm/page_owner_sort.c +++ b/tools/vm/page_owner_sort.c @@ -53,15 +53,29 @@ enum CULL_BIT { CULL_COMM = 1<<4, CULL_STACKTRACE = 1<<5 }; +enum ARG_TYPE { + ARG_TXT, ARG_COMM, ARG_STACKTRACE, ARG_ALLOC_TS, ARG_FREE_TS, + ARG_CULL_TIME, ARG_PAGE_NUM, ARG_PID, ARG_TGID, ARG_UNKNOWN, ARG_FREE +}; +enum SORT_ORDER { + SORT_ASC = 1, + SORT_DESC = -1, +}; struct filter_condition { - pid_t *tgids; - int tgids_size; pid_t *pids; - int pids_size; + pid_t *tgids; char **comms; + int pids_size; + int tgids_size; int comms_size; }; +struct sort_condition { + int (**cmps)(const void *, const void *); + int *signs; + int size; +}; static struct filter_condition fc; +static struct sort_condition sc; static regex_t order_pattern; static regex_t pid_pattern; static regex_t tgid_pattern; @@ -107,14 +121,14 @@ static int compare_num(const void *p1, const void *p2) { const struct block_list *l1 = p1, *l2 = p2; - return l2->num - l1->num; + return l1->num - l2->num; } static int compare_page_num(const void *p1, const void *p2) { const struct block_list *l1 = p1, *l2 = p2; - return l2->page_num - l1->page_num; + return l1->page_num - l2->page_num; } static int compare_pid(const void *p1, const void *p2) @@ -180,6 +194,16 @@ static int compare_cull_condition(const void *p1, const void *p2) return 0; } +static int compare_sort_condition(const void *p1, const void *p2) +{ + int cmp = 0; + + for (int i = 0; i < sc.size; ++i) + if (cmp == 0) + cmp = sc.signs[i] * sc.cmps[i](p1, p2); + return cmp; +} + static int search_pattern(regex_t *pattern, char *pattern_str, char *buf) { int err, val_len; @@ -345,6 +369,29 @@ static char *get_comm(char *buf) return comm_str; } +static int get_arg_type(const char *arg) +{ + if (!strcmp(arg, "pid") || !strcmp(arg, "p")) + return ARG_PID; + else if (!strcmp(arg, "tgid") || !strcmp(arg, "tg")) + return ARG_TGID; + else if (!strcmp(arg, "name") || !strcmp(arg, "n")) + return ARG_COMM; + else if (!strcmp(arg, "stacktrace") || !strcmp(arg, "st")) + return ARG_STACKTRACE; + else if (!strcmp(arg, "free") || !strcmp(arg, "f")) + return ARG_FREE; + else if (!strcmp(arg, "txt") || !strcmp(arg, "T")) + return ARG_TXT; + else if (!strcmp(arg, "free_ts") || !strcmp(arg, "ft")) + return ARG_FREE_TS; + else if (!strcmp(arg, "alloc_ts") || !strcmp(arg, "at")) + return ARG_ALLOC_TS; + else { + return ARG_UNKNOWN; + } +} + static bool match_num_list(int num, int *list, int list_size) { for (int i = 0; i < list_size; ++i) @@ -428,21 +475,86 @@ static bool parse_cull_args(const char *arg_str) int size = 0; char **args = explode(',', arg_str, &size); - for (int i = 0; i < size; ++i) - if (!strcmp(args[i], "pid") || !strcmp(args[i], "p")) + for (int i = 0; i < size; ++i) { + int arg_type = get_arg_type(args[i]); + + if (arg_type == ARG_PID) cull |= CULL_PID; - else if (!strcmp(args[i], "tgid") || !strcmp(args[i], "tg")) + else if (arg_type == ARG_TGID) cull |= CULL_TGID; - else if (!strcmp(args[i], "name") || !strcmp(args[i], "n")) + else if (arg_type == ARG_COMM) cull |= CULL_COMM; - else if (!strcmp(args[i], "stacktrace") || !strcmp(args[i], "st")) + else if (arg_type == ARG_STACKTRACE) cull |= CULL_STACKTRACE; - else if (!strcmp(args[i], "free") || !strcmp(args[i], "f")) + else if (arg_type == ARG_FREE) cull |= CULL_UNRELEASE; else { free_explode(args, size); return false; } + } + free_explode(args, size); + return true; +} + +static void set_single_cmp(int (*cmp)(const void *, const void *), int sign) +{ + if (sc.signs == NULL || sc.size < 1) + sc.signs = calloc(1, sizeof(int)); + sc.signs[0] = sign; + if (sc.cmps == NULL || sc.size < 1) + sc.cmps = calloc(1, sizeof(int *)); + sc.cmps[0] = cmp; + sc.size = 1; +} + +static bool parse_sort_args(const char *arg_str) +{ + int size = 0; + + if (sc.size != 0) { /* reset sort_condition */ + free(sc.signs); + free(sc.cmps); + size = 0; + } + + char **args = explode(',', arg_str, &size); + + sc.signs = calloc(size, sizeof(int)); + sc.cmps = calloc(size, sizeof(int *)); + for (int i = 0; i < size; ++i) { + int offset = 0; + + sc.signs[i] = SORT_ASC; + if (args[i][0] == '-' || args[i][0] == '+') { + if (args[i][0] == '-') + sc.signs[i] = SORT_DESC; + offset = 1; + } + + int arg_type = get_arg_type(args[i]+offset); + + if (arg_type == ARG_PID) + sc.cmps[i] = compare_pid; + else if (arg_type == ARG_TGID) + sc.cmps[i] = compare_tgid; + else if (arg_type == ARG_COMM) + sc.cmps[i] = compare_comm; + else if (arg_type == ARG_STACKTRACE) + sc.cmps[i] = compare_stacktrace; + else if (arg_type == ARG_ALLOC_TS) + sc.cmps[i] = compare_ts; + else if (arg_type == ARG_FREE_TS) + sc.cmps[i] = compare_free_ts; + else if (arg_type == ARG_TXT) + sc.cmps[i] = compare_txt; + else { + free_explode(args, size); + sc.size = 0; + return false; + } + } + sc.size = size; free_explode(args, size); return true; } @@ -485,13 +597,13 @@ static void usage(void) "--pid <pidlist>\tSelect by pid. This selects the information of blocks whose process ID numbers appear in <pidlist>.\n" "--tgid <tgidlist>\tSelect by tgid. This selects the information of blocks whose Thread Group ID numbers appear in <tgidlist>.\n" "--name <cmdlist>\n\t\tSelect by command name. This selects the information of blocks whose command name appears in <cmdlist>.\n" - "--cull <rules>\tCull by user-defined rules. <rules> is a single argument in the form of a comma-separated list with some common fields predefined\n" + "--cull <rules>\tCull by user-defined rules.<rules> is a single argument in the form of a comma-separated list with some common fields predefined\n" + "--sort <order>\tSpecify sort order as: [+|-]key[,[+|-]key[,...]]\n" ); } int main(int argc, char **argv) { - int (*cmp)(const void *, const void *) = compare_num; FILE *fin, *fout; char *buf; int ret, i, count; @@ -502,37 +614,38 @@ int main(int argc, char **argv) { "tgid", required_argument, NULL, 2 }, { "name", required_argument, NULL, 3 }, { "cull", required_argument, NULL, 4 }, + { "sort", required_argument, NULL, 5 }, { 0, 0, 0, 0}, }; while ((opt = getopt_long(argc, argv, "afmnprstP", longopts, NULL)) != -1) switch (opt) { case 'a': - cmp = compare_ts; + set_single_cmp(compare_ts, SORT_ASC); break; case 'f': filter = filter | FILTER_UNRELEASE; break; case 'm': - cmp = compare_page_num; + set_single_cmp(compare_page_num, SORT_DESC); break; case 'p': - cmp = compare_pid; + set_single_cmp(compare_pid, SORT_ASC); break; case 'r': - cmp = compare_free_ts; + set_single_cmp(compare_free_ts, SORT_ASC); break; case 's': - cmp = compare_stacktrace; + set_single_cmp(compare_stacktrace, SORT_ASC); break; case 't': - cmp = compare_num; + set_single_cmp(compare_num, SORT_DESC); break; case 'P': - cmp = compare_tgid; + set_single_cmp(compare_tgid, SORT_ASC); break; case 'n': - cmp = compare_comm; + set_single_cmp(compare_comm, SORT_ASC); break; case 1: filter = filter | FILTER_PID; @@ -563,6 +676,13 @@ int main(int argc, char **argv) exit(1); } break; + case 5: + if (!parse_sort_args(optarg)) { + fprintf(stderr, "wrong argument after --sort option:%s\n", + optarg); + exit(1); + } + break; default: usage(); exit(1); @@ -622,7 +742,7 @@ int main(int argc, char **argv) } } - qsort(list, count, sizeof(list[0]), cmp); + qsort(list, count, sizeof(list[0]), compare_sort_condition); for (i = 0; i < count; i++) { if (cull == 0) |