== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 22:13:12 (1767323592)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.97668 s, 13.1 MB/s
llite.lustre-ffff8925c528c000.read_ahead_stats=clear
llite.lustre-ffff8925c528c000.read_ahead_stats=
snapshot_time             1767323617.077520534 secs.nsecs
start_time                1767323604.082005787 secs.nsecs
elapsed_time              12.995514747 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          41 samples [pages]
failed_to_reach_end       1 samples [pages]
failed_to_fast_read       230 samples [pages]
mmap_range_read           225 samples [pages]
readahead_pages           225 samples [pages] 8 128 25370
/usr/bin/fio
thp                     : Memory Advise Huge Page
read_test: (g=0): rw=read, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=mmap, iodepth=1
fio-3.19
Starting 1 process

read_test: (groupid=0, jobs=1): err= 0: pid=229468: Thu Jan  1 22:21:25 2026
  read: IOPS=11, BW=11.1MiB/s (11.6MB/s)(5120MiB/462567msec)
    clat (msec): min=25, max=232, avg=89.99, stdev=26.82
     lat (msec): min=25, max=232, avg=89.99, stdev=26.82
    clat percentiles (msec):
     |  1.00th=[   54],  5.00th=[   59], 10.00th=[   63], 20.00th=[   69],
     | 30.00th=[   74], 40.00th=[   79], 50.00th=[   84], 60.00th=[   90],
     | 70.00th=[   97], 80.00th=[  108], 90.00th=[  129], 95.00th=[  148],
     | 99.00th=[  176], 99.50th=[  184], 99.90th=[  209], 99.95th=[  222],
     | 99.99th=[  234]
   bw (  KiB/s): min= 4063, max=18432, per=100.00%, avg=11389.34, stdev=2699.77, samples=917
   iops        : min=    3, max=   18, avg=10.61, stdev= 2.68, samples=917
  lat (msec)   : 50=0.37%, 100=73.22%, 250=26.41%
  cpu          : usr=0.57%, sys=50.36%, ctx=18920, majf=6599, minf=1304389
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=5120,0,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: bw=11.1MiB/s (11.6MB/s), 11.1MiB/s-11.1MiB/s (11.6MB/s-11.6MB/s), io=5120MiB (5369MB), run=462567-462567msec