== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:10:27 (1761142227)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.65585 s, 13.7 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-ffff9de744cf4800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.11611
Iter 1/10: OSS cache speed: 2.33498
Iter 1/10: ladvise speed: 2.34764
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.15971
Iter 2/10: OSS cache speed: 2.22119
Iter 2/10: ladvise speed: 2.28575
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.15873
Iter 3/10: OSS cache speed: 2.38142
Iter 3/10: ladvise speed: 2.46533
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.28111
Iter 4/10: OSS cache speed: 2.37867
Iter 4/10: ladvise speed: 2.41275
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.26321
Iter 5/10: OSS cache speed: 2.35981
Iter 5/10: ladvise speed: 2.43325
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.99939
Iter 6/10: OSS cache speed: 2.29017
Iter 6/10: ladvise speed: 2.31407
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.98696
Iter 7/10: OSS cache speed: 2.07669
Iter 7/10: ladvise speed: 1.9433
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.7231
Iter 8/10: OSS cache speed: 1.69628
Iter 8/10: ladvise speed: 1.44332
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.29871
Iter 9/10: OSS cache speed: 1.58872
Iter 9/10: ladvise speed: 1.47586
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.28096
Iter 10/10: OSS cache speed: 1.43511
Iter 10/10: ladvise speed: 1.38182
Average uncached read: 1.92
Average speedup with OSS cached read:  2.07 = +7%
Average speedup with ladvise willread:  2.05 = +6%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0