== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:27:18 (1787192838)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.9095 s, 8.1 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-ffff9d3148939800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.417092
Iter 1/10: OSS cache speed: 0.421455
Iter 1/10: ladvise speed: 0.40688
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.477865
Iter 2/10: OSS cache speed: 0.36068
Iter 2/10: ladvise speed: 0.434771
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.435801
Iter 3/10: OSS cache speed: 0.493713
Iter 3/10: ladvise speed: 0.509342
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.353945
Iter 4/10: OSS cache speed: 0.501486
Iter 4/10: ladvise speed: 0.448969
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.556877
Iter 5/10: OSS cache speed: 0.454693
Iter 5/10: ladvise speed: 0.536335
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.579008
Iter 6/10: OSS cache speed: 0.507845
Iter 6/10: ladvise speed: 0.5926
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.59051
Iter 7/10: OSS cache speed: 0.564321
Iter 7/10: ladvise speed: 0.592975
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.514385
Iter 8/10: OSS cache speed: 0.521831
Iter 8/10: ladvise speed: 0.545147
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.470087
Iter 9/10: OSS cache speed: 0.615564
Iter 9/10: ladvise speed: 0.536883
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.553337
Iter 10/10: OSS cache speed: 0.452825
Iter 10/10: ladvise speed: 0.473836
Average uncached read: .49
Average speedup with OSS cached read:  .48 = +-2%
Average speedup with ladvise willread:  .50 = +2%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0