== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:07:39 (1788354459)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.91878 s, 17.7 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-ffff8a2e89bb2000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.6569
Iter 1/10: OSS cache speed: 1.84266
Iter 1/10: ladvise speed: 2.40358
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.25861
Iter 2/10: OSS cache speed: 1.79381
Iter 2/10: ladvise speed: 1.89161
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.23654
Iter 3/10: OSS cache speed: 2.19987
Iter 3/10: ladvise speed: 2.47504
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.01337
Iter 4/10: OSS cache speed: 2.1392
Iter 4/10: ladvise speed: 2.32496
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.07499
Iter 5/10: OSS cache speed: 2.13906
Iter 5/10: ladvise speed: 2.24997
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.31468
Iter 6/10: OSS cache speed: 2.43084
Iter 6/10: ladvise speed: 2.47719
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.33577
Iter 7/10: OSS cache speed: 1.99829
Iter 7/10: ladvise speed: 2.42626
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.33012
Iter 8/10: OSS cache speed: 2.52223
Iter 8/10: ladvise speed: 2.1087
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.27879
Iter 9/10: OSS cache speed: 2.19282
Iter 9/10: ladvise speed: 1.4727
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.25033
Iter 10/10: OSS cache speed: 1.48684
Iter 10/10: ladvise speed: 1.97873
Average uncached read: 1.97
Average speedup with OSS cached read:  2.07 = +5%
Average speedup with ladvise willread:  2.18 = +10%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0