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libmemtrack: Use kgsl memory flag to determine usermapped buffers

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Instead of using useraddr from kgsl memory allocations to be
matched against proc/<pid>/smaps file to be used to determine
usermapping of a buffer, use the newly added flag which directly
indicates whether a given gpubuffer entry is usermapped or
not. The flag is the last character in the "flags" field.

CRs-fixed: 634962
Change-Id: I1f82f7a2ff207eb780f1938a3b1347451b1e3d77
This commit is contained in:
Harsh Vardhan Dwivedi
2014-05-05 22:30:02 -06:00
parent 9c0fe91455
commit 0a0cd2a588
1 changed files with 12 additions and 48 deletions
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60
libmemtrack/kgsl.c
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@@ -47,7 +47,6 @@ int kgsl_memtrack_get_memory(pid_t pid, enum memtrack_type type,
size_t allocated_records = min(*num_records, ARRAY_SIZE(record_templates));
int i;
FILE *fp;
FILE *smaps_fp = NULL;
char line[1024];
char tmp[128];
size_t accounted_size = 0;
@@ -70,19 +69,14 @@ int kgsl_memtrack_get_memory(pid_t pid, enum memtrack_type type,
return -errno;
}
if (type == MEMTRACK_TYPE_GL) {
snprintf(tmp, sizeof(tmp), "/proc/%d/smaps", pid);
smaps_fp = fopen(tmp, "r");
if (smaps_fp == NULL) {
fclose(fp);
return -errno;
}
}
/* Go through each line of <pid>/mem file and for every entry of type "gpumem"
* check if the gpubuffer entry is usermapped or not. If the entry is usermapped
* count the entry as accounted else count the entry as unaccounted.
*/
while (1) {
unsigned long uaddr;
unsigned long size;
char line_type[7];
char flags[7];
int ret;
if (fgets(line, sizeof(line), fp) == NULL) {
@@ -91,49 +85,21 @@ int kgsl_memtrack_get_memory(pid_t pid, enum memtrack_type type,
/* Format:
* gpuaddr useraddr size id flags type usage sglen
* 545ba000 545ba000 4096 1 ----p gpumem arraybuffer 1
* 545ba000 545ba000 4096 1 ----pY gpumem arraybuffer 1
*/
ret = sscanf(line, "%*x %lx %lu %*d %*s %6s %*s %*d\n",
&uaddr, &size, line_type);
ret = sscanf(line, "%*x %*lx %lu %*d %6s %6s %*s %*d\n",
&size, flags, line_type);
if (ret != 3) {
continue;
}
if (type == MEMTRACK_TYPE_GL && strcmp(line_type, "gpumem") == 0) {
bool accounted = false;
/*
* We need to cross reference the user address against smaps,
* luckily both are sorted.
*/
while (smaps_addr <= uaddr) {
unsigned long start;
unsigned long end;
unsigned long smaps_size;
if (fgets(line, sizeof(line), smaps_fp) == NULL) {
break;
}
if (sscanf(line, "%8lx-%8lx", &start, &end) == 2) {
smaps_addr = start;
continue;
}
if (smaps_addr != uaddr) {
continue;
}
if (sscanf(line, "Rss: %lu kB", &smaps_size) == 1) {
if (smaps_size) {
accounted = true;
accounted_size += size;
break;
}
}
}
if (!accounted) {
if (flags[6] == 'Y')
accounted_size += size;
else
unaccounted_size += size;
}
} else if (type == MEMTRACK_TYPE_GRAPHICS && strcmp(line_type, "ion") == 0) {
unaccounted_size += size;
}
@@ -146,8 +112,6 @@ int kgsl_memtrack_get_memory(pid_t pid, enum memtrack_type type,
records[1].size_in_bytes = unaccounted_size;
}
if (smaps_fp)
fclose(smaps_fp);
fclose(fp);
return 0;