== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:06:28 (1775873188)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 16.2457 s, 6.5 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-ffff89a6e01d3800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.32624
Iter 1/10: OSS cache speed: 0.362405
Iter 1/10: ladvise speed: 0.350987
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.302163
Iter 2/10: OSS cache speed: 0.348486
Iter 2/10: ladvise speed: 0.387903
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.385583
Iter 3/10: OSS cache speed: 0.398501
Iter 3/10: ladvise speed: 0.490392
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.448231
Iter 4/10: OSS cache speed: 0.541549
Iter 4/10: ladvise speed: 0.57381
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.505509
Iter 5/10: OSS cache speed: 0.553851
Iter 5/10: ladvise speed: 0.580117
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.552809
Iter 6/10: OSS cache speed: 0.601097
Iter 6/10: ladvise speed: 0.580202
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.486636
Iter 7/10: OSS cache speed: 0.525988
Iter 7/10: ladvise speed: 0.529201
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.478457
Iter 8/10: OSS cache speed: 0.574625
Iter 8/10: ladvise speed: 0.597233
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.538256
Iter 9/10: OSS cache speed: 0.601125
Iter 9/10: ladvise speed: 0.663835
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.573798
Iter 10/10: OSS cache speed: 0.628792
Iter 10/10: ladvise speed: 0.690863
Average uncached read: .45
Average speedup with OSS cached read:  .51 = +13%
Average speedup with ladvise willread:  .54 = +20%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0