== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:15:45 (1763334945)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.53359 s, 11.0 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-ffff9a6510fc0000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.449484
Iter 1/10: OSS cache speed: 0.38949
Iter 1/10: ladvise speed: 0.371233
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.362696
Iter 2/10: OSS cache speed: 0.407615
Iter 2/10: ladvise speed: 0.397894
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.356124
Iter 3/10: OSS cache speed: 0.404908
Iter 3/10: ladvise speed: 0.398062
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.386929
Iter 4/10: OSS cache speed: 0.442082
Iter 4/10: ladvise speed: 0.460276
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.505704
Iter 5/10: OSS cache speed: 0.423473
Iter 5/10: ladvise speed: 0.463222
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.503578
Iter 6/10: OSS cache speed: 0.516225
Iter 6/10: ladvise speed: 0.437561
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.450172
Iter 7/10: OSS cache speed: 0.429732
Iter 7/10: ladvise speed: 0.516281
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.461947
Iter 8/10: OSS cache speed: 0.529847
Iter 8/10: ladvise speed: 0.451776
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.526416
Iter 9/10: OSS cache speed: 0.495636
Iter 9/10: ladvise speed: 0.462536
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.444302
Iter 10/10: OSS cache speed: 0.466706
Iter 10/10: ladvise speed: 0.401846
Average uncached read: .44
Average speedup with OSS cached read:  .45 = +2%
Average speedup with ladvise willread:  .43 = +-2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0