== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:05:51 (1786943151)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.8339 s, 9.7 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-ffff9d99cabdf800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.364425
Iter 1/10: OSS cache speed: 0.389138
Iter 1/10: ladvise speed: 0.463927
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.450884
Iter 2/10: OSS cache speed: 0.506107
Iter 2/10: ladvise speed: 0.522894
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.471552
Iter 3/10: OSS cache speed: 0.535525
Iter 3/10: ladvise speed: 0.546074
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.492823
Iter 4/10: OSS cache speed: 0.556537
Iter 4/10: ladvise speed: 0.602975
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.516847
Iter 5/10: OSS cache speed: 0.627437
Iter 5/10: ladvise speed: 0.730545
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.628453
Iter 6/10: OSS cache speed: 0.683216
Iter 6/10: ladvise speed: 0.745968
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.39844
Iter 7/10: OSS cache speed: 0.478048
Iter 7/10: ladvise speed: 0.539848
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.460964
Iter 8/10: OSS cache speed: 0.493436
Iter 8/10: ladvise speed: 0.601866
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.822144
Iter 9/10: OSS cache speed: 0.847873
Iter 9/10: ladvise speed: 0.892402
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.752038
Iter 10/10: OSS cache speed: 0.950665
Iter 10/10: ladvise speed: 1.09912
Average uncached read: .53
Average speedup with OSS cached read:  .60 = +13%
Average speedup with ladvise willread:  .67 = +26%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0