Hi Arnaldo,
On 1/21/2021 9:02 PM, Arnaldo Carvalho de Melo wrote:
So if we just want to append the default list, we only need to set
detailed_run=1, then ideally perf-stat will print the default list.
But for now, there are no task-clock, context-switches, cpu-migrations,
page-faults, instructions, branches and branch-misses displayed.
root@kbl-ppc:~# ./perf stat -e cycles -d -a -- sleep 1
Performance counter stats for 'system wide':
124,178,207 cycles
(80.02%)
6,444,490 L1-dcache-loads
(80.01%)
1,043,169 L1-dcache-load-misses # 16.19% of all L1-dcache
accesses (80.02%)
564,474 LLC-loads
(80.02%)
49,262 LLC-load-misses # 8.73% of all LL-cache
accesses (79.92%)
1.001614947 seconds time elapsed
Do we still need the '+' prefix to add the specified event on top of default
list? It looks current syntax should already support that feature, but just
need to fix some issues.
I think we can do away with that '+' when showing the added events and
its counts.
- Arnaldo
Can you help to look at my v3 (I will post it soon)? It only has one line change but it can achieve
the goal. Another advantage is it can append the metrics to the default event list easily.
For example,
root@kbl-ppc:~# ./perf stat -M Page_Walks_Utilization -d -a -- sleep 1
Performance counter stats for 'system wide':
1,417,358 itlb_misses.walk_pending # 0.177 M/sec
# 0.05
Page_Walks_Utilization (30.44%)
1,145,481 dtlb_store_misses.walk_pending # 0.143 M/sec
(30.85%)
126,098,937 cycles # 0.016 GHz
(31.25%)
9,069,839 dtlb_load_misses.walk_pending # 1.132 M/sec
(31.64%)
0 ept.walk_pending # 0.000 K/sec
(31.61%)
8,009.41 msec cpu-clock # 7.994 CPUs utilized
300 context-switches # 0.037 K/sec
8 cpu-migrations # 0.001 K/sec
3 page-faults # 0.000 K/sec
124,456,362 cycles # 0.016 GHz
(31.20%)
23,924,628 instructions # 0.19 insn per cycle
(38.79%)
4,532,511 branches # 0.566 M/sec
(38.39%)
650,797 branch-misses # 14.36% of all branches
(38.00%)
6,332,823 L1-dcache-loads # 0.791 M/sec
(37.95%)
1,056,199 L1-dcache-load-misses # 16.68% of all L1-dcache
accesses (37.95%)
572,791 LLC-loads # 0.072 M/sec
(30.36%)
52,025 LLC-load-misses # 9.08% of all LL-cache
accesses (30.36%)
1.001966758 seconds time elapsed
It appends the metric 'Page_Walks_Utilization' to the default event list.
Anyway, if you think it's not a good solution, I'd like to change it. :)
Thanks
Jin Yao
