== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:17:50 (1708827470)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.4273 s, 43.2 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
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 3.12601
Iter 1/10: OSS cache speed: 3.62336
Iter 1/10: ladvise speed: 2.8264
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 3.08566
Iter 2/10: OSS cache speed: 2.87458
Iter 2/10: ladvise speed: 0.577739
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.69922
Iter 3/10: OSS cache speed: 3.36562
Iter 3/10: ladvise speed: 3.24193
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 3.16798
Iter 4/10: OSS cache speed: 3.36434
Iter 4/10: ladvise speed: 2.15651
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.87344
Iter 5/10: OSS cache speed: 3.34592
Iter 5/10: ladvise speed: 3.19519
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 3.03163
Iter 6/10: OSS cache speed: 3.18153
Iter 6/10: ladvise speed: 3.30504
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.91108
Iter 7/10: OSS cache speed: 3.35073
Iter 7/10: ladvise speed: 3.18235
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.89683
Iter 8/10: OSS cache speed: 3.25766
Iter 8/10: ladvise speed: 3.19297
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.80827
Iter 9/10: OSS cache speed: 3.10395
Iter 9/10: ladvise speed: 3.07791
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 3.36264
Iter 10/10: OSS cache speed: 3.63612
Iter 10/10: ladvise speed: 3.55709
Average uncached read: 2.99
Average speedup with OSS cached read: 3.31 = +10.70%
Average speedup with ladvise willread: 2.83 = +-5.35%
Speedup with OSS cached read less than 20%, got 10.70%. Skipping ladvise willread check.
fail_loc=0