== sanity test 255a: check 'lfs ladvise -a willread' ===== 04:12:42 (1773735162)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 25.3868 s, 4.1 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-ffff91e790135800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.15614
Iter 1/10: OSS cache speed: 0.178257
Iter 1/10: ladvise speed: 0.199789
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.176411
Iter 2/10: OSS cache speed: 0.204656
Iter 2/10: ladvise speed: 0.182477
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.176068
Iter 3/10: OSS cache speed: 0.181516
Iter 3/10: ladvise speed: 0.201891
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.163154
Iter 4/10: OSS cache speed: 0.1948
Iter 4/10: ladvise speed: 0.197504
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.196853
Iter 5/10: OSS cache speed: 0.201821
Iter 5/10: ladvise speed: 0.203671
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.170254
Iter 6/10: OSS cache speed: 0.194288
Iter 6/10: ladvise speed: 0.198275
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.184186
Iter 7/10: OSS cache speed: 0.226394
Iter 7/10: ladvise speed: 0.211948
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.18354
Iter 8/10: OSS cache speed: 0.180486
Iter 8/10: ladvise speed: 0.185879
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.192441
Iter 9/10: OSS cache speed: 0.206413
Iter 9/10: ladvise speed: 0.200366
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.204255
Iter 10/10: OSS cache speed: 0.194746
Iter 10/10: ladvise speed: 0.218211
Average uncached read: .18
Average speedup with OSS cached read:  .19 = +5%
Average speedup with ladvise willread:  .20 = +11%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0