== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:41:34 (1787434894)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.4557 s, 7.8 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-ffff8ded85144000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.519305
Iter 1/10: OSS cache speed: 0.478774
Iter 1/10: ladvise speed: 0.474264
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.475195
Iter 2/10: OSS cache speed: 0.546288
Iter 2/10: ladvise speed: 0.458851
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.51072
Iter 3/10: OSS cache speed: 0.355361
Iter 3/10: ladvise speed: 0.429971
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.489686
Iter 4/10: OSS cache speed: 0.382939
Iter 4/10: ladvise speed: 0.378663
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.45883
Iter 5/10: OSS cache speed: 0.481361
Iter 5/10: ladvise speed: 0.390126
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.474831
Iter 6/10: OSS cache speed: 0.348307
Iter 6/10: ladvise speed: 0.389309
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.442321
Iter 7/10: OSS cache speed: 0.349302
Iter 7/10: ladvise speed: 0.446473
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.312752
Iter 8/10: OSS cache speed: 0.375328
Iter 8/10: ladvise speed: 0.493797
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.385151
Iter 9/10: OSS cache speed: 0.374689
Iter 9/10: ladvise speed: 0.35525
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.443671
Iter 10/10: OSS cache speed: 0.409881
Iter 10/10: ladvise speed: 0.358788
Average uncached read: .45
Average speedup with OSS cached read:  .41 = +-8%
Average speedup with ladvise willread:  .41 = +-8%
Speedup with OSS cached read less than 20%,  got -8%. Skipping ladvise willread check.
fail_loc=0