== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:56:19 (1781232979)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.7621 s, 7.1 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-ffff928459f9d000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.266842
Iter 1/10: OSS cache speed: 0.294713
Iter 1/10: ladvise speed: 0.297146
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.316871
Iter 2/10: OSS cache speed: 0.290514
Iter 2/10: ladvise speed: 0.302452
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.26499
Iter 3/10: OSS cache speed: 0.275093
Iter 3/10: ladvise speed: 0.312009
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.255361
Iter 4/10: OSS cache speed: 0.325221
Iter 4/10: ladvise speed: 0.283353
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.287767
Iter 5/10: OSS cache speed: 0.314512
Iter 5/10: ladvise speed: 0.274331
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.278775
Iter 6/10: OSS cache speed: 0.281513
Iter 6/10: ladvise speed: 0.351359
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.277776
Iter 7/10: OSS cache speed: 0.315963
Iter 7/10: ladvise speed: 0.345427
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.260392
Iter 8/10: OSS cache speed: 0.343005
Iter 8/10: ladvise speed: 0.330124
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.304028
Iter 9/10: OSS cache speed: 0.311856
Iter 9/10: ladvise speed: 0.362796
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.338486
Iter 10/10: OSS cache speed: 0.317276
Iter 10/10: ladvise speed: 0.319947
Average uncached read: .28
Average speedup with OSS cached read:  .30 = +7%
Average speedup with ladvise willread:  .31 = +10%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0