== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:12:08 (1788804728)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.4451 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-ffff8f58c8bf6800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.340286
Iter 1/10: OSS cache speed: 0.392697
Iter 1/10: ladvise speed: 0.433647
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.405493
Iter 2/10: OSS cache speed: 0.428645
Iter 2/10: ladvise speed: 0.438575
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.38228
Iter 3/10: OSS cache speed: 0.434548
Iter 3/10: ladvise speed: 0.458643
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.413007
Iter 4/10: OSS cache speed: 0.492071
Iter 4/10: ladvise speed: 0.555772
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.485782
Iter 5/10: OSS cache speed: 0.599237
Iter 5/10: ladvise speed: 0.652527
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.548887
Iter 6/10: OSS cache speed: 0.639613
Iter 6/10: ladvise speed: 0.625607
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.574714
Iter 7/10: OSS cache speed: 0.696135
Iter 7/10: ladvise speed: 0.771757
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.650032
Iter 8/10: OSS cache speed: 0.756235
Iter 8/10: ladvise speed: 0.834539
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.841385
Iter 9/10: OSS cache speed: 0.962907
Iter 9/10: ladvise speed: 1.05354
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.01836
Iter 10/10: OSS cache speed: 1.29859
Iter 10/10: ladvise speed: 1.22308
Average uncached read: .56
Average speedup with OSS cached read:  .67 = +19%
Average speedup with ladvise willread:  .70 = +25%
Speedup with OSS cached read less than 20%,  got 19%. Skipping ladvise willread check.
fail_loc=0