== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:00:53 (1781607653)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.10554 s, 14.8 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-ffff9ed1439ef000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.646458
Iter 1/10: OSS cache speed: 0.752449
Iter 1/10: ladvise speed: 0.824967
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.780806
Iter 2/10: OSS cache speed: 1.19042
Iter 2/10: ladvise speed: 0.997376
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.884824
Iter 3/10: OSS cache speed: 1.10885
Iter 3/10: ladvise speed: 1.08037
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.08016
Iter 4/10: OSS cache speed: 1.02241
Iter 4/10: ladvise speed: 0.859437
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.957076
Iter 5/10: OSS cache speed: 1.43474
Iter 5/10: ladvise speed: 1.88533
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.819549
Iter 6/10: OSS cache speed: 0.798685
Iter 6/10: ladvise speed: 0.532884
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.611244
Iter 7/10: OSS cache speed: 0.656209
Iter 7/10: ladvise speed: 0.705923
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.591515
Iter 8/10: OSS cache speed: 0.664091
Iter 8/10: ladvise speed: 0.709482
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.706388
Iter 9/10: OSS cache speed: 0.796855
Iter 9/10: ladvise speed: 0.848604
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.774929
Iter 10/10: OSS cache speed: 0.832174
Iter 10/10: ladvise speed: 0.827823
Average uncached read: .78
Average speedup with OSS cached read:  .92 = +17%
Average speedup with ladvise willread:  .92 = +17%
Speedup with OSS cached read less than 20%,  got 17%. Skipping ladvise willread check.
fail_loc=0