== sanity test 255a: check 'lfs ladvise -a willread' ===== 03:28:44 (1782631724)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.48466 s, 16.2 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-ffff91c4c5474000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.20585
Iter 1/10: OSS cache speed: 2.2935
Iter 1/10: ladvise speed: 2.19455
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.14829
Iter 2/10: OSS cache speed: 2.16788
Iter 2/10: ladvise speed: 2.07401
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.27534
Iter 3/10: OSS cache speed: 2.34056
Iter 3/10: ladvise speed: 2.19282
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.92244
Iter 4/10: OSS cache speed: 1.83331
Iter 4/10: ladvise speed: 2.08634
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.27662
Iter 5/10: OSS cache speed: 2.01914
Iter 5/10: ladvise speed: 2.0011
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.9821
Iter 6/10: OSS cache speed: 2.30608
Iter 6/10: ladvise speed: 2.05394
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.20911
Iter 7/10: OSS cache speed: 2.33393
Iter 7/10: ladvise speed: 2.27682
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.3012
Iter 8/10: OSS cache speed: 2.46582
Iter 8/10: ladvise speed: 2.44928
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.95369
Iter 9/10: OSS cache speed: 1.46494
Iter 9/10: ladvise speed: 1.28706
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.05936
Iter 10/10: OSS cache speed: 1.37862
Iter 10/10: ladvise speed: 1.93495
Average uncached read: 1.93
Average speedup with OSS cached read:  2.06 = +6%
Average speedup with ladvise willread:  2.05 = +6%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0