On 21. 08. 24, 8:40, Jiri Slaby wrote:
From https://bugzilla.suse.com/show_bug.cgi?id=1229450#c20:
Run on 64bit:
pahole -j32 -> 4.102 GB
pahole -j16 -> 3.895 GB
pahole -j1 -> 3.706 GB
On 32bit (the same vmlinux):
pahole -j32 -> 2.870 GB (crash)
pahole -j16 -> 2.810 GB
pahole -j1 -> 2.444 GB
Look there for full massif report.
From https://bugzilla.suse.com/show_bug.cgi?id=1229450#c21:
(In reply to Jiri Slaby from comment #20)
> | | | ->24.01% (954,816,480B) 0x489B4AB: UnknownInlinedFun
(dwarf_loader.c:959)
So given this struct class_member is the largest consumer, running
pahole on pahole. The below results in 4.102 GB -> 3.585 GB savings.
--- a/dwarves.h
+++ b/dwarves.h
@@ -487,14 +487,14 @@ int cu__for_all_tags(struct cu *cu,
*/
struct tag {
struct list_head node;
+ const char *attribute;
+ void *priv;
type_id_t type;
uint16_t tag;
+ uint16_t recursivity_level;
bool visited;
bool top_level;
bool has_btf_type_tag;
- uint16_t recursivity_level;
- const char *attribute;
- void *priv;
};
// To use with things like type->type_enum ==
perf_event_type+perf_user_event_type
@@ -1086,17 +1086,17 @@ static inline int function__inlined(const struct
function *func)
struct class_member {
struct tag tag;
const char *name;
+ uint64_t const_value;
uint32_t bit_offset;
uint32_t bit_size;
uint32_t byte_offset;
int hole;
size_t byte_size;
+ uint32_t alignment;
int8_t bitfield_offset;
uint8_t bitfield_size;
uint8_t bit_hole;
uint8_t bitfield_end:1;
- uint64_t const_value;
- uint32_t alignment;
uint8_t visited:1;
uint8_t is_static:1;
uint8_t has_bit_offset:1;
--
js
suse labs
