rt/snapraid
1
0
Fork 0
mirror of https://github.com/amadvance/snapraid.git synced 2026-10-26 10:51:54 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

Gather access counters in Windows

Browse source
This commit is contained in:
Andrea Mazzoleni 2026-03-04 11:06:19 +01:00
parent a38e3c5f36
commit 4bc30e976a
2 changed files with 71 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

70
cmdline/mingw.c
View file

@ -2390,6 +2390,61 @@ static int devtree(devinfo_t* parent, tommy_list* list)
return 0;
}
/**
* Compute disk usage by aggregating access statistics.
*
* On many Windows versions, these raw disk performance counters are disabled by default to save overhead.
*
* If DeviceIoControl call with IOCTL_DISK_PERFORMANCE returns zeros or fails, the counters are likely disabled.
*
* Run the following command from an elevated command prompt:
*
* diskperf -y
*
* This change usually requires a reboot to take effect at the driver level.
*/
static int devstat(uint64_t device, const char* name, const char* wfile, uint64_t* count)
{
wchar_t conv_buf[CONV_MAX];
HANDLE h;
BOOL ret;
DISK_PERFORMANCE ds;
DWORD bytes;
char file[128];
snprintf(file, sizeof(file), "/dev/pd%" PRIu64, device);
/* open the volume */
h = CreateFileW(convert(conv_buf, wfile), 0, FILE_SHARE_READ | FILE_SHARE_WRITE, 0, OPEN_EXISTING, 0, 0);
if (h == INVALID_HANDLE_VALUE) {
DWORD error = GetLastError();
windows_errno(error);
log_tag("device:%s:%s:error:%lu\n", file, name, error);
return -1;
}
bytes = 0;
ret = DeviceIoControl(h, IOCTL_DISK_PERFORMANCE, NULL, 0, &ds, sizeof(ds), &bytes, NULL);
if (!ret) {
DWORD error = GetLastError();
CloseHandle(h);
windows_errno(error);
log_tag("device:%s:%s:error:%lu\n", file, name, error);
return -1;
}
if (!CloseHandle(h)) {
DWORD error = GetLastError();
windows_errno(error);
log_tag("device:%s:%s:error:%lu\n", file, name, error);
return -1;
}
*count = ds.ReadCount + ds.WriteCount;
return 0;
}
/**
* Read smartctl --scan from a stream.
* Return 0 on success.
@ -2444,6 +2499,11 @@ static int smartctl_scan(FILE* f, tommy_list* list)
pathprint(devinfo->file, sizeof(devinfo->file), "/dev/pd%" PRIu64, devinfo->device);
pathprint(devinfo->wfile, sizeof(devinfo->wfile), "\\\\.\\PhysicalDrive%" PRIu64, devinfo->device);
/* retrieve access stat for the low level device */
uint64_t access_stat;
if (devstat(device, devinfo->name, devinfo->wfile, &access_stat) == 0)
devinfo->access_stat = access_stat;
/* insert in the list */
tommy_list_insert_tail(list, &devinfo->node, devinfo);
}
@ -3166,6 +3226,7 @@ int devquery(tommy_list* high, tommy_list* low, int operation, int others)
/* for each device */
for (i = tommy_list_head(high); i != 0; i = i->next) {
devinfo_t* devinfo = i->data;
uint64_t access_stat;
if (devresolve(devinfo->mount, devinfo->file, sizeof(devinfo->file), devinfo->wfile, sizeof(devinfo->wfile)) != 0) {
/* LCOV_EXCL_START */
@ -3174,6 +3235,15 @@ int devquery(tommy_list* high, tommy_list* low, int operation, int others)
/* LCOV_EXCL_STOP */
}
/* retrieve access stat for the high level device */
if (devstat(devinfo->device, devinfo->name, devinfo->wfile, &access_stat) == 0) {
/* cumulate access stat in the first split */
if (devinfo->split)
devinfo->split->access_stat += access_stat;
else
devinfo->access_stat += access_stat;
}
/* expand the tree of devices */
if (devtree(devinfo, low) != 0) {
/* LCOV_EXCL_START */

4
cmdline/unix.c
View file

@ -1544,10 +1544,8 @@ static int devscan(tommy_list* list)
/* retrieve access stat for the low level device */
uint64_t access_stat;
if (devstat(device, &access_stat) == 0) {
/* cumulate access stat in the first split */
if (devstat(device, &access_stat) == 0)
devinfo->access_stat = access_stat;
}
/* insert in the list */
tommy_list_insert_tail(list, &devinfo->node, devinfo);