== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:34:28 (1763084068)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.19918 s, 16.9 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-ffffa0eb84a29800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.947797
Iter 1/10: OSS cache speed: 0.874826
Iter 1/10: ladvise speed: 0.907713
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.962371
Iter 2/10: OSS cache speed: 1.37893
Iter 2/10: ladvise speed: 1.28336
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.088
Iter 3/10: OSS cache speed: 1.42452
Iter 3/10: ladvise speed: 1.42831
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.45686
Iter 4/10: OSS cache speed: 1.22859
Iter 4/10: ladvise speed: 1.48217
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.74365
Iter 5/10: OSS cache speed: 1.78687
Iter 5/10: ladvise speed: 1.82062
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.93595
Iter 6/10: OSS cache speed: 1.99931
Iter 6/10: ladvise speed: 2.03681
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.0163
Iter 7/10: OSS cache speed: 2.01027
Iter 7/10: ladvise speed: 2.05787
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.14591
Iter 8/10: OSS cache speed: 2.11446
Iter 8/10: ladvise speed: 2.12059
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.33077
Iter 9/10: OSS cache speed: 2.11093
Iter 9/10: ladvise speed: 2.06275
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.03711
Iter 10/10: OSS cache speed: 2.16047
Iter 10/10: ladvise speed: 2.22192
Average uncached read: 1.66
Average speedup with OSS cached read:  1.70 = +2%
Average speedup with ladvise willread:  1.74 = +4%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0