== sanity test 255a: check 'lfs ladvise -a willread' ===== 23:43:27 (1789357407)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.41447 s, 16.3 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-ffff9f3a86886000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.08046
Iter 1/10: OSS cache speed: 1.29688
Iter 1/10: ladvise speed: 1.1261
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.611787
Iter 2/10: OSS cache speed: 0.787743
Iter 2/10: ladvise speed: 0.797095
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.720113
Iter 3/10: OSS cache speed: 1.04437
Iter 3/10: ladvise speed: 0.907133
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.913825
Iter 4/10: OSS cache speed: 1.21077
Iter 4/10: ladvise speed: 1.60903
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.32663
Iter 5/10: OSS cache speed: 1.76058
Iter 5/10: ladvise speed: 1.83592
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.17934
Iter 6/10: OSS cache speed: 1.87595
Iter 6/10: ladvise speed: 1.50135
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.63584
Iter 7/10: OSS cache speed: 2.19073
Iter 7/10: ladvise speed: 2.36201
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.22109
Iter 8/10: OSS cache speed: 2.65379
Iter 8/10: ladvise speed: 2.57248
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.13872
Iter 9/10: OSS cache speed: 2.31884
Iter 9/10: ladvise speed: 2.33314
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.08221
Iter 10/10: OSS cache speed: 2.42237
Iter 10/10: ladvise speed: 2.37823
Average uncached read: 1.39
Average speedup with OSS cached read:  1.75 = +25%
Average speedup with ladvise willread:  1.74 = +25%
fail_loc=0