== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:10:43 (1718399443)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.975162 s, 108 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: 1.84819
Iter 1/10: OSS cache speed: 1.88754
Iter 1/10: ladvise speed: 2.27861
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 3.59656
Iter 2/10: OSS cache speed: 5.15123
Iter 2/10: ladvise speed: 5.48147
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 5.56893
Iter 3/10: OSS cache speed: 5.50934
Iter 3/10: ladvise speed: 5.58959
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 4.92718
Iter 4/10: OSS cache speed: 5.473
Iter 4/10: ladvise speed: 5.31054
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 5.17296
Iter 5/10: OSS cache speed: 5.13778
Iter 5/10: ladvise speed: 5.29897
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 5.25185
Iter 6/10: OSS cache speed: 5.36996
Iter 6/10: ladvise speed: 5.107
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 4.98529
Iter 7/10: OSS cache speed: 4.83386
Iter 7/10: ladvise speed: 4.48299
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 4.70696
Iter 8/10: OSS cache speed: 4.30242
Iter 8/10: ladvise speed: 4.22314
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 4.25276
Iter 9/10: OSS cache speed: 4.92516
Iter 9/10: ladvise speed: 2.35832
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.5142
Iter 10/10: OSS cache speed: 3.32392
Iter 10/10: ladvise speed: 2.02704
Average uncached read: 4.28
Average speedup with OSS cached read:  4.59 = +7.24%
Average speedup with ladvise willread:  4.21 = +-1.63%
Speedup with OSS cached read less than 20%,  got 4.59%. Skipping ladvise willread check.