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Added/Updated tests\bugs\gh_7092_test.py: changed ratio and limits - see notes.

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pavel-zotov 2024-08-22 16:09:49 +03:00
parent c7f75bf41d
commit f5fc896942
1 changed files with 22 additions and 15 deletions
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37
tests/bugs/gh_7092_test.py
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@ -13,15 +13,20 @@ DESCRIPTION:
We do these measures <N_MEASURES> times for each SP, and each result is added to the list
which, in turn, is the source for median evaluation.
Finally, we get ratio between minimal and maximal medians (see 'median_ratio')
On Windows 8.1 usually this ratio is about 7 (before fix it was more than 100).
This ratio is about:
* Windows: 0.6 ... 0.7
* Linux: 0.5 ... 0.6
Before fix it was more than 10.
Test is considered as passed if median_ratio less than threshold <MAX_RATIO>.
NOTES:
Number of iterations for loops differ: we have to perform 'sp_empty_loop' at least 1E6 times
in order to get valuable difference between CPU user time counters and use it as denomitator.
Procedure 'sp_ctime_loop' must be called for 10x times LESS than 'sp_empty_loop'.
Confirmed problem on:
4.0.1.2699 (01-jan-2022): median ratio was 109 ... 110 (3.40 vs 0.03)
5.0.0.362 (01-jan-2022): median ratio was 111 ... 113 (3.51 vs 0.03)
5.0.0.362, 4.0.1.2699 (bith snapshots have date 01-jan-2022)
Checked on 6.0.0.195, 5.0.0.1305, 4.0.5.3049.
Scope of median ratio values: 4.33 ... 7.00
"""
import psutil
@ -43,12 +48,13 @@ def median(lst):
N_MEASURES = 15
# How many iterations must be done:
N_COUNT_PER_MEASURE = 100000
N_COUNT_TIME_LOOP = 100000
N_COUNT_EMPTY_LOOP = 1000000
# Maximal value for ratio between maximal and minimal medians
#
MAX_RATIO = 15
##############
MAX_RATIO = 1.5
###############
init_script = \
f'''
@ -60,12 +66,12 @@ f'''
begin
while (n < a_limit) do
begin
n = n + 1;
d = current_time;
n = n + 1;
end
end
^
create procedure sp_dummy_loop(a_limit int)
create procedure sp_empty_loop(a_limit int)
as
declare n int = 1;
begin
@ -79,7 +85,7 @@ f'''
^
'''
db = db_factory(init = init_script)
db = db_factory(init = init_script, charset = 'win1251')
act = python_act('db')
expected_stdout = """
@ -96,24 +102,25 @@ def test_1(act: Action, capsys):
sp_time = {}
for i in range(0, N_MEASURES):
for sp_name in ('sp_ctime_loop', 'sp_dummy_loop'):
for sp_name in ('sp_ctime_loop', 'sp_empty_loop'):
n_count = N_COUNT_TIME_LOOP if sp_name == 'sp_ctime_loop' else N_COUNT_EMPTY_LOOP
fb_info_init = psutil.Process(fb_pid).cpu_times()
cur.callproc( sp_name, (N_COUNT_PER_MEASURE,) )
cur.callproc( sp_name, (n_count,) )
fb_info_curr = psutil.Process(fb_pid).cpu_times()
sp_time[ sp_name, i ] = max(fb_info_curr.user - fb_info_init.user, 0.000001)
sp_ctime_median = median([v for k,v in sp_time.items() if k[0] == 'sp_ctime_loop'])
sp_dummy_median = median([v for k,v in sp_time.items() if k[0] == 'sp_dummy_loop'])
sp_dummy_median = median([v for k,v in sp_time.items() if k[0] == 'sp_empty_loop'])
#----------------------------------
median_ratio = sp_ctime_median / sp_dummy_median
print( 'Medians ratio: ' + ('acceptable' if median_ratio <= MAX_RATIO else '/* perf_issue_tag */ POOR: %s, more than threshold: %s' % ( '{:9g}'.format(median_ratio), '{:9g}'.format(MAX_RATIO) ) ) )
if median_ratio > MAX_RATIO:
print('CPU times for each of {N_MEASURES} measures:')
print(f'CPU times for each of {N_MEASURES} measures:')
for k,v in sp_time.items():
print(k,':::',v)
print(f'Median cpu time for {N_MEASURES} measures using loops for {N_COUNT_PER_MEASURE} iterations in each SP call:')
print(f'Median cpu time for {N_MEASURES} measures:')
print('sp_ctime_median:',sp_ctime_median)
print('sp_dummy_median:',sp_dummy_median)
print('median_ratio:',median_ratio)