== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:41:41 (1722238901)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.637172 s, 165 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=4
fail_loc=0x237
Asynchronous ladvise shouldn't wait
fail_loc=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 3.63555
Iter 1/10: OSS cache speed: 3.83256
Iter 1/10: ladvise speed: 2.77165
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 3.64231
Iter 2/10: OSS cache speed: 3.39439
Iter 2/10: ladvise speed: 3.60791
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 4.17339
Iter 3/10: OSS cache speed: 3.96372
Iter 3/10: ladvise speed: 3.54922
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 3.76924
Iter 4/10: OSS cache speed: 4.30164
Iter 4/10: ladvise speed: 4.29586
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 4.30424
Iter 5/10: OSS cache speed: 4.54836
Iter 5/10: ladvise speed: 4.6182
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 4.9652
Iter 6/10: OSS cache speed: 5.45112
Iter 6/10: ladvise speed: 5.56017
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 5.16263
Iter 7/10: OSS cache speed: 5.56388
Iter 7/10: ladvise speed: 5.6916
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 4.61936
Iter 8/10: OSS cache speed: 4.98664
Iter 8/10: ladvise speed: 4.84067
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 4.83311
Iter 9/10: OSS cache speed: 4.87639
Iter 9/10: ladvise speed: 4.73579
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 4.94225
Iter 10/10: OSS cache speed: 4.82297
Iter 10/10: ladvise speed: 4.87631
Average uncached read: 4.40
Average speedup with OSS cached read:  4.57 = +3.86%
Average speedup with ladvise willread:  4.45 = +1.13%
Speedup with OSS cached read less than 20%,  got 4.57%. Skipping ladvise willread check.