== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:48:25 (1783144105)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.0529 s, 14.9 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
llite.lustre-ffff948a13867800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.635423
Iter 1/10: OSS cache speed: 0.696497
Iter 1/10: ladvise speed: 0.652941
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.62549
Iter 2/10: OSS cache speed: 0.881354
Iter 2/10: ladvise speed: 0.997118
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.640208
Iter 3/10: OSS cache speed: 0.752665
Iter 3/10: ladvise speed: 1.05009
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.12418
Iter 4/10: OSS cache speed: 1.32327
Iter 4/10: ladvise speed: 1.24637
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.888292
Iter 5/10: OSS cache speed: 1.3716
Iter 5/10: ladvise speed: 1.12016
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.917049
Iter 6/10: OSS cache speed: 1.30567
Iter 6/10: ladvise speed: 1.71911
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.18186
Iter 7/10: OSS cache speed: 1.63011
Iter 7/10: ladvise speed: 1.66412
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.20661
Iter 8/10: OSS cache speed: 1.62936
Iter 8/10: ladvise speed: 1.91453
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.40131
Iter 9/10: OSS cache speed: 1.74471
Iter 9/10: ladvise speed: 1.79083
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.74798
Iter 10/10: OSS cache speed: 1.78628
Iter 10/10: ladvise speed: 2.20911
Average uncached read: 1.03
Average speedup with OSS cached read:  1.31 = +27%
Average speedup with ladvise willread:  1.43 = +38%
fail_loc=0