== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:03:56 (1783137836)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.8582 s, 8.2 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-ffff8da7ccc87000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.351694
Iter 1/10: OSS cache speed: 0.336994
Iter 1/10: ladvise speed: 0.415682
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.395163
Iter 2/10: OSS cache speed: 0.427179
Iter 2/10: ladvise speed: 0.433505
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.432801
Iter 3/10: OSS cache speed: 0.419904
Iter 3/10: ladvise speed: 0.354912
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.418167
Iter 4/10: OSS cache speed: 0.426881
Iter 4/10: ladvise speed: 0.406952
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.387613
Iter 5/10: OSS cache speed: 0.448735
Iter 5/10: ladvise speed: 0.411118
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.379834
Iter 6/10: OSS cache speed: 0.385081
Iter 6/10: ladvise speed: 0.398067
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.43081
Iter 7/10: OSS cache speed: 0.401566
Iter 7/10: ladvise speed: 0.367578
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.413478
Iter 8/10: OSS cache speed: 0.427058
Iter 8/10: ladvise speed: 0.347923
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.347962
Iter 9/10: OSS cache speed: 0.408748
Iter 9/10: ladvise speed: 0.425388
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.350846
Iter 10/10: OSS cache speed: 0.402175
Iter 10/10: ladvise speed: 0.38376
Average uncached read: .39
Average speedup with OSS cached read:  .40 = +2%
Average speedup with ladvise willread:  .39 = +0%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0