== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:34:14 (1787607254)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.4313 s, 8.4 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-ffff8ad4842ce800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.429773
Iter 1/10: OSS cache speed: 0.370468
Iter 1/10: ladvise speed: 0.381199
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.394743
Iter 2/10: OSS cache speed: 0.452
Iter 2/10: ladvise speed: 0.413432
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.417003
Iter 3/10: OSS cache speed: 0.456403
Iter 3/10: ladvise speed: 0.370157
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.418758
Iter 4/10: OSS cache speed: 0.385266
Iter 4/10: ladvise speed: 0.432812
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.427318
Iter 5/10: OSS cache speed: 0.441437
Iter 5/10: ladvise speed: 0.422564
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.416789
Iter 6/10: OSS cache speed: 0.423632
Iter 6/10: ladvise speed: 0.420542
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.414688
Iter 7/10: OSS cache speed: 0.428059
Iter 7/10: ladvise speed: 0.429584
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.406692
Iter 8/10: OSS cache speed: 0.395667
Iter 8/10: ladvise speed: 0.460072
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.405755
Iter 9/10: OSS cache speed: 0.461812
Iter 9/10: ladvise speed: 0.360323
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.398208
Iter 10/10: OSS cache speed: 0.406822
Iter 10/10: ladvise speed: 0.444328
Average uncached read: .41
Average speedup with OSS cached read:  .42 = +2%
Average speedup with ladvise willread:  .41 = +0%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0