== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:17:29 (1708827449)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.62919 s, 39.9 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: 3.10185
Iter 1/10: OSS cache speed: 3.37982
Iter 1/10: ladvise speed: 0.827794
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.276341
Iter 2/10: OSS cache speed: 2.63643
Iter 2/10: ladvise speed: 2.41897
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.21139
Iter 3/10: OSS cache speed: 2.5223
Iter 3/10: ladvise speed: 3.40027
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 3.05414
Iter 4/10: OSS cache speed: 3.19563
Iter 4/10: ladvise speed: 3.14571
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.72371
Iter 5/10: OSS cache speed: 3.06266
Iter 5/10: ladvise speed: 3.05126
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.41316
Iter 6/10: OSS cache speed: 2.92446
Iter 6/10: ladvise speed: 3.28607
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.88819
Iter 7/10: OSS cache speed: 3.04326
Iter 7/10: ladvise speed: 3.13519
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 3.09375
Iter 8/10: OSS cache speed: 3.21427
Iter 8/10: ladvise speed: 3.21854
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.93063
Iter 9/10: OSS cache speed: 3.22673
Iter 9/10: ladvise speed: 3.18557
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.93963
Iter 10/10: OSS cache speed: 3.35865
Iter 10/10: ladvise speed: 3.23014
Average uncached read: 2.56
Average speedup with OSS cached read: 3.05 = +19.14%
Average speedup with ladvise willread: 2.88 = +12.50%
Speedup with OSS cached read less than 20%, got 19.14%. Skipping ladvise willread check.
fail_loc=0