summaryrefslogtreecommitdiff
path: root/tools/perf
diff options
context:
space:
mode:
authorIan Rogers <irogers@google.com>2023-10-25 01:23:13 +0300
committerNamhyung Kim <namhyung@kernel.org>2023-10-25 23:39:32 +0300
commitdec07fe5d4fd29aed2faf17f56140cd402175d72 (patch)
tree32014cc4e58db7adcadcab7da7f46e9413fe8ab9 /tools/perf
parent6ba29fbb0b3863fa50c809d098680a0f3e0bd625 (diff)
downloadlinux-dec07fe5d4fd29aed2faf17f56140cd402175d72.tar.xz
perf callchain: Minor layout changes to callchain_list
Avoid 6 byte hole for padding. Place more frequently used fields first in an attempt to use just 1 cacheline in the common case. Before: ``` struct callchain_list { u64 ip; /* 0 8 */ struct map_symbol ms; /* 8 24 */ struct { _Bool unfolded; /* 32 1 */ _Bool has_children; /* 33 1 */ }; /* 32 2 */ /* XXX 6 bytes hole, try to pack */ u64 branch_count; /* 40 8 */ u64 from_count; /* 48 8 */ u64 predicted_count; /* 56 8 */ /* --- cacheline 1 boundary (64 bytes) --- */ u64 abort_count; /* 64 8 */ u64 cycles_count; /* 72 8 */ u64 iter_count; /* 80 8 */ u64 iter_cycles; /* 88 8 */ struct branch_type_stat * brtype_stat; /* 96 8 */ const char * srcline; /* 104 8 */ struct list_head list; /* 112 16 */ /* size: 128, cachelines: 2, members: 13 */ /* sum members: 122, holes: 1, sum holes: 6 */ }; ``` After: ``` struct callchain_list { struct list_head list; /* 0 16 */ u64 ip; /* 16 8 */ struct map_symbol ms; /* 24 24 */ const char * srcline; /* 48 8 */ u64 branch_count; /* 56 8 */ /* --- cacheline 1 boundary (64 bytes) --- */ u64 from_count; /* 64 8 */ u64 cycles_count; /* 72 8 */ u64 iter_count; /* 80 8 */ u64 iter_cycles; /* 88 8 */ struct branch_type_stat * brtype_stat; /* 96 8 */ u64 predicted_count; /* 104 8 */ u64 abort_count; /* 112 8 */ struct { _Bool unfolded; /* 120 1 */ _Bool has_children; /* 121 1 */ }; /* 120 2 */ /* size: 128, cachelines: 2, members: 13 */ /* padding: 6 */ }; ``` Signed-off-by: Ian Rogers <irogers@google.com> Cc: K Prateek Nayak <kprateek.nayak@amd.com> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Cc: Sandipan Das <sandipan.das@amd.com> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: German Gomez <german.gomez@arm.com> Cc: James Clark <james.clark@arm.com> Cc: Nick Terrell <terrelln@fb.com> Cc: Sean Christopherson <seanjc@google.com> Cc: Changbin Du <changbin.du@huawei.com> Cc: liuwenyu <liuwenyu7@huawei.com> Cc: Yang Jihong <yangjihong1@huawei.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Miguel Ojeda <ojeda@kernel.org> Cc: Song Liu <song@kernel.org> Cc: Leo Yan <leo.yan@linaro.org> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com> Cc: Yanteng Si <siyanteng@loongson.cn> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Link: https://lore.kernel.org/r/20231024222353.3024098-11-irogers@google.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/util/callchain.h16
1 files changed, 8 insertions, 8 deletions
diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
index 86e8a9e81456..d5c66345ae31 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -116,22 +116,22 @@ extern struct callchain_param callchain_param;
extern struct callchain_param callchain_param_default;
struct callchain_list {
+ struct list_head list;
u64 ip;
struct map_symbol ms;
- struct /* for TUI */ {
- bool unfolded;
- bool has_children;
- };
+ const char *srcline;
u64 branch_count;
u64 from_count;
- u64 predicted_count;
- u64 abort_count;
u64 cycles_count;
u64 iter_count;
u64 iter_cycles;
struct branch_type_stat *brtype_stat;
- const char *srcline;
- struct list_head list;
+ u64 predicted_count;
+ u64 abort_count;
+ struct /* for TUI */ {
+ bool unfolded;
+ bool has_children;
+ };
};
/*