yystopf/openharmony_kernel_liteos_a
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

feat: add /proc/fs_cache to display cache info

Browse Source 
add /proc/fs_cache to display vnode, path cache, page cache.
also change some bad virable name

close: #I3WWBD

Signed-off-by: mucor <mucorwang@gmail.com>
This commit is contained in:
mucor
2021-06-21 16:11:06 +08:00
parent 7f484dfa09
commit 231cb6be27
9 changed files with 299 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
kernel/base/include/los_vm_filemap.h
View File

@@ -206,6 +206,9 @@ VOID OsMarkPageDirty(LosFilePage *fpage, LosVmMapRegion *region, int off, int le
typedef struct ProcessCB LosProcessCB;
VOID OsVmmFileRegionFree(struct file *filep, LosProcessCB *processCB);
#ifdef LOSCFG_DEBUG_VERSION
VOID ResetPageCacheHitInfo(int *try, int *hit);
#endif
#ifdef __cplusplus
#if __cplusplus
}

20
kernel/base/vm/los_vm_filemap.c
View File

@@ -47,6 +47,24 @@
#define UNUSED(x) (VOID)x
#endif
#ifdef LOSCFG_DEBUG_VERSION
static int g_totalPageCacheTry = 0;
static int g_totalPageCacheHit = 0;
#define TRACE_TRY_CACHE() do { g_totalPageCacheTry++; } while (0)
#define TRACE_HIT_CACHE() do { g_totalPageCacheHit++; } while (0)
VOID ResetPageCacheHitInfo(int *try, int *hit)
{
*try = g_totalPageCacheTry;
*hit = g_totalPageCacheHit;
g_totalPageCacheHit = 0;
g_totalPageCacheTry = 0;
}
#else
#define TRACE_TRY_CACHE()
#define TRACE_HIT_CACHE()
#endif
#ifdef LOSCFG_KERNEL_VM
STATIC VOID OsPageCacheAdd(LosFilePage *page, struct page_mapping *mapping, VM_OFFSET_T pgoff)
@@ -365,7 +383,9 @@ INT32 OsVmmFileFault(LosVmMapRegion *region, LosVmPgFault *vmf)
/* get or create a new cache node */
LOS_SpinLockSave(&mapping->list_lock, &intSave);
fpage = OsFindGetEntry(mapping, vmf->pgoff);
TRACE_TRY_CACHE();
if (fpage != NULL) {
TRACE_HIT_CACHE();
OsPageRefIncLocked(fpage);
} else {
fpage = OsPageCacheAlloc(mapping, vmf->pgoff);