在 2023/10/23 15:58, HAGIO KAZUHITO(萩尾 一仁) 写道:
On 2023/10/11 10:40, Huang Shijie wrote:In the NUMA machine, it is useful to know the memory distribution of an inode page cache: How many pages in the node 0? How many pages in the node 1? Add "files -n" command to get the memory distribution information: 1.) Add new argument for dump_inode_page_cache_info() 2.) make page_to_nid() a global function. 3.) Add sumary_inode_page() to check each page's node information. 4.) Use print_inode_sumary_info() to print the memory distribution information of an inode. Signed-off-by: Huang Shijie <shijie@xxxxxxxxxxxxxxxxxxxxxx>Thanks for the patch. I tried it, but most of file inodes emit an error like this: crash> files 2249 | grep messages 81 ffff8915f73f7300 ffff8915d6bb03c0 ffff8915edb12788 REG /var/log/messages crash> files -n ffff8915edb12788 INODE NRPAGES ffff8915edb12788 200 files: do_xarray: callback operation failed: entry: 0 item: fffff3e1f84f8540 Am I missing anything?
Strange.. I will check the code again..
--- defs.h | 1 + filesys.c | 52 +++++++++++++++++++++++++++++++++++++++++++++++----- help.c | 10 ++++++++++ memory.c | 3 +-- 4 files changed, 59 insertions(+), 7 deletions(-) diff --git a/defs.h b/defs.h index 96a7a2a..dfcc33d 100644 --- a/defs.h +++ b/defs.h @@ -5748,6 +5748,7 @@ int dump_inode_page(ulong); ulong valid_section_nr(ulong); void display_memory_from_file_offset(ulonglong, long, void *); void swap_info_init(void); +int page_to_nid(ulong);/** filesys.c diff --git a/filesys.c b/filesys.c index 1d0ee7f..3c6a6bd 100644 --- a/filesys.c +++ b/filesys.c @@ -49,7 +49,7 @@ static int match_file_string(char *, char *, char *); static ulong get_root_vfsmount(char *); static void check_live_arch_mismatch(void); static long get_inode_nrpages(ulong); -static void dump_inode_page_cache_info(ulong); +static void dump_inode_page_cache_info(ulong, void *callback);#define DENTRY_CACHE (20)#define INODE_CACHE (20) @@ -2192,8 +2192,30 @@ get_inode_nrpages(ulong i_mapping) return nrpages; }+/* Used to collect the numa information for an inode */+static unsigned long *numa_node;nitpicking, but usually we use ulong for unsigned long.
no problem.
+ +static void +print_inode_sumary_info(void) +{ + int i; + + fprintf(fp, "The physical memory in the page cache:\n"); + for (i = 0; i < vt->numnodes; i++) + fprintf(fp, "\tNode[%d]: %16ld pages\n", i, numa_node[i]);I would prefer more crash-like output, e.g. crash> files -n ffff8915edb12788 INODE NRPAGES ffff8915edb12788 200 NODE PAGES 0 150 1 50 crash> o
OK. I will change to this format.
+} + +static int +sumary_inode_page(ulong page)Is "sumary" a typo of "summary"? or a common word?
it should be summary..
And a warning is observed: filesys.c: In function 'sumary_inode_page': filesys.c:2215:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ (Probably no return value causes the callback failure?)+{ + int node = page_to_nid(page); + + if (node >= 0) + numa_node[node]++; +} + static void -dump_inode_page_cache_info(ulong inode) +dump_inode_page_cache_info(ulong inode, void *callback) { char *inode_buf; ulong i_mapping, nrpages, root_rnode, xarray, count; @@ -2236,7 +2258,7 @@ dump_inode_page_cache_info(ulong inode) root_rnode = i_mapping + OFFSET(address_space_page_tree);lp.index = 0;- lp.value = (void *)&dump_inode_page; + lp.value = callback;if (root_rnode)count = do_radix_tree(root_rnode, RADIX_TREE_DUMP_CB, &lp); @@ -2276,7 +2298,7 @@ cmd_files(void) ref = NULL; refarg = NULL;- while ((c = getopt(argcnt, args, "d:R:p:c")) != EOF) {+ while ((c = getopt(argcnt, args, "d:n:R:p:c")) != EOF) { switch(c) { case 'R': @@ -2295,11 +2317,31 @@ cmd_files(void) display_dentry_info(value); return;+ case 'n':+ if (VALID_MEMBER(address_space_page_tree) && + VALID_MEMBER(inode_i_mapping)) { + value = htol(optarg, FAULT_ON_ERROR, NULL); + + /* Allocate the array for this inode */ + numa_node = malloc(sizeof(unsigned long) * vt->numnodes); + BZERO(numa_node, sizeof(unsigned long) * vt->numnodes); + + dump_inode_page_cache_info(value, (void *)&sumary_inode_page); + + /* Print out the NUMA node information for this inode */ + print_inode_sumary_info(); + + free(numa_node); + numa_node = NULL; + } else + option_not_supported('n'); + return; + case 'p': if (VALID_MEMBER(address_space_page_tree) && VALID_MEMBER(inode_i_mapping)) { value = htol(optarg, FAULT_ON_ERROR, NULL); - dump_inode_page_cache_info(value); + dump_inode_page_cache_info(value, (void *)&dump_inode_page); } else option_not_supported('p'); return; diff --git a/help.c b/help.c index cc7ab20..9b70940 100644 --- a/help.c +++ b/help.c @@ -7863,6 +7863,8 @@ char *help_files[] = { " specific, and only shows the data requested.\n", " -d dentry given a hexadecimal dentry address, display its inode,", " super block, file type, and full pathname.", +" -n inode given a hexadecimal inode address, check all the pages", +" in the page cache, and give a NUMA node distribution.",I would prefer "display" instead of "give" in crash help.
okay.. Thanks Huang Shijie -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://listman.redhat.com/mailman/listinfo/crash-utility Contribution Guidelines: https://github.com/crash-utility/crash/wiki
