== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:11:03 (1738955463)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.53495 s, 41.4 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff8800aa487800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.52769
Iter 1/10: OSS cache speed: 1.44004
Iter 1/10: ladvise speed: 1.49777
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.80557
Iter 2/10: OSS cache speed: 1.67525
Iter 2/10: ladvise speed: 1.97246
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.23072
Iter 3/10: OSS cache speed: 2.1294
Iter 3/10: ladvise speed: 1.66281
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.14364
Iter 4/10: OSS cache speed: 1.84576
Iter 4/10: ladvise speed: 1.4522
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.00471
Iter 5/10: OSS cache speed: 2.67163
Iter 5/10: ladvise speed: 2.85893
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.77161
Iter 6/10: OSS cache speed: 1.46918
Iter 6/10: ladvise speed: 1.38483
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.52003
Iter 7/10: OSS cache speed: 1.40237
Iter 7/10: ladvise speed: 1.7614
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.42697
Iter 8/10: OSS cache speed: 1.43369
Iter 8/10: ladvise speed: 1.44766
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.37255
Iter 9/10: OSS cache speed: 1.44288
Iter 9/10: ladvise speed: 1.37991
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.3843
Iter 10/10: OSS cache speed: 1.74789
Iter 10/10: ladvise speed: 1.41012
Average uncached read: 1.81
Average speedup with OSS cached read:  1.72 = +-4%
Average speedup with ladvise willread:  1.68 = +-7%
Speedup with OSS cached read less than 20%,  got -4%. Skipping ladvise willread check.
fail_loc=0