Some mem_stat types don't use all 8 columns. And there are cases only
samples in certain kinds of mem_stat types are available only. For that
case hide columns which has no samples.
The new output for the previous data would be:
$ perf mem report -F overhead,op,comm --stdio
...
# ------ Mem Op -------
# Overhead Load Store Other Command
# ........ ..................... ...............
#
44.85% 21.1% 30.7% 48.3% swapper
26.82% 98.8% 0.3% 0.9% netsli-prober
7.19% 51.7% 13.7% 34.6% perf
5.81% 89.7% 2.2% 8.1% qemu-system-ppc
4.77% 100.0% 0.0% 0.0% notifications_c
1.77% 95.9% 1.2% 3.0% MemoryReleaser
0.77% 71.6% 4.1% 24.3% DefaultEventMan
0.19% 66.7% 22.2% 11.1% gnome-shell
...
On Intel machines, the event is only for loads or stores so it'll have
only one column:
# Mem Op
# Overhead Load Command
# ........ ....... ...............
#
20.55% 100.0% swapper
17.13% 100.0% chrome
9.02% 100.0% data-loop.0
6.26% 100.0% pipewire-pulse
5.63% 100.0% threaded-ml
5.47% 100.0% GraphRunner
5.37% 100.0% AudioIP~allback
5.30% 100.0% Chrome_ChildIOT
3.17% 100.0% Isolated Web Co
...
Committer testing:
# grep "model name" -m1 /proc/cpuinfo
model name : AMD Ryzen 9 9950X3D 16-Core Processo
# perf mem report -F overhead,op,comm --stdio
# Total Lost Samples: 0
#
# Samples: 2K of event 'cycles:P'
# Total weight : 2637
# Sort order : local_weight,mem,sym,dso,symbol_daddr,dso_daddr,snoop,tlb,locked,blocked,local_ins_lat,local_p_stage_cyc
#
# ------ Mem Op -------
# Overhead Load Store Other Command
# ........ ..................... ...............
#
61.02% 14.4% 25.5% 60.1% swapper
5.61% 26.4% 13.5% 60.1% Isolated Web Co
5.50% 21.4% 29.7% 49.0% perf
4.74% 27.2% 15.2% 57.6% gnome-shell
4.63% 33.6% 11.5% 54.9% mdns_service
4.29% 28.3% 12.4% 59.3% ptyxis
2.16% 24.6% 19.3% 56.1% DOM Worker
0.99% 23.1% 34.6% 42.3% firefox
0.72% 26.3% 15.8% 57.9% IPC I/O Parent
0.61% 12.5% 12.5% 75.0% kworker/u130:20
0.61% 37.5% 18.8% 43.8% podman
0.57% 33.3% 6.7% 60.0% Timer
0.53% 14.3% 7.1% 78.6% KMS thread
0.49% 30.8% 7.7% 61.5% kworker/u130:3-
0.46% 41.7% 33.3% 25.0% IPDL Background
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Link: https://lore.kernel.org/r/20250430205548.789750-9-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
for (int i = 0; i < MEM_STAT_LEN; i++) {
u64 val = he->mem_stat[mem_stat_idx].entries[i];
+ if (hists->mem_stat_total[mem_stat_idx].entries[i] == 0)
+ continue;
+
ret += hpp__call_print_fn(hpp, print_fn, fmtstr, 100.0 * val / total);
}
int ret = 0;
int len;
enum mem_stat_type mst = hpp__mem_stat_type(fmt);
+ int mem_stat_idx = -1;
+
+ for (int i = 0; i < hists->nr_mem_stats; i++) {
+ if (hists->mem_stat_types[i] == mst) {
+ mem_stat_idx = i;
+ break;
+ }
+ }
+ assert(mem_stat_idx != -1);
- (void)hists;
if (line == 0) {
int left, right;
- len = fmt->len;
+ len = 0;
+ /* update fmt->len for acutally used columns only */
+ for (int i = 0; i < MEM_STAT_LEN; i++) {
+ if (hists->mem_stat_total[mem_stat_idx].entries[i])
+ len += MEM_STAT_PRINT_LEN;
+ }
+ fmt->len = len;
+
+ /* print header directly if single column only */
+ if (len == MEM_STAT_PRINT_LEN)
+ return scnprintf(hpp->buf, hpp->size, "%*s", len, fmt->name);
+
left = (len - strlen(fmt->name)) / 2 - 1;
right = len - left - strlen(fmt->name) - 2;
left, graph_dotted_line, fmt->name, right, graph_dotted_line);
}
+
len = hpp->size;
for (int i = 0; i < MEM_STAT_LEN; i++) {
int printed;
+ if (hists->mem_stat_total[mem_stat_idx].entries[i] == 0)
+ continue;
+
printed = scnprintf(buf, len, "%*s", MEM_STAT_PRINT_LEN,
mem_stat_name(mst, i));
ret += printed;
if (hists->mem_stat_types == NULL)
return -ENOMEM;
+ hists->mem_stat_total = calloc(nr_mem_stats,
+ sizeof(*hists->mem_stat_total));
+ if (hists->mem_stat_total == NULL)
+ return -ENOMEM;
+
memcpy(hists->mem_stat_types, mst, nr_mem_stats * sizeof(*mst));
hists->nr_mem_stats = nr_mem_stats;
}
assert(0 <= idx && idx < MEM_STAT_LEN);
he->mem_stat[i].entries[idx] += period;
+ hists->mem_stat_total[i].entries[idx] += period;
}
return 0;
}
hists__delete_all_entries(hists);
zfree(&hists->mem_stat_types);
+ zfree(&hists->mem_stat_total);
list_for_each_entry_safe(node, tmp, &hists->hpp_formats, list) {
perf_hpp_list__for_each_format_safe(&node->hpp, fmt, pos) {
int nr_hpp_node;
int nr_mem_stats;
enum mem_stat_type *mem_stat_types;
+ struct he_mem_stat *mem_stat_total;
};
#define hists__has(__h, __f) (__h)->hpp_list->__f
projects / thirdparty / linux.git / commitdiff
