== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 00:00:52 (1763355652)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.16723 s, 17.0 MB/s
llite.lustre-ffff91452f64a800.read_ahead_stats=clear
llite.lustre-ffff91452f64a800.read_ahead_stats=
snapshot_time             1763355668.008657082 secs.nsecs
start_time                1763355660.753991364 secs.nsecs
elapsed_time              7.254665718 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          4 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=226200: Mon Nov 17 00:06:55 2025
  read: IOPS=14, BW=14.9MiB/s (15.6MB/s)(5120MiB/344750msec)
    clat (msec): min=34, max=202, avg=67.13, stdev=27.42
     lat (msec): min=34, max=202, avg=67.14, stdev=27.42
    clat percentiles (msec):
     |  1.00th=[   39],  5.00th=[   45], 10.00th=[   47], 20.00th=[   49],
     | 30.00th=[   51], 40.00th=[   53], 50.00th=[   55], 60.00th=[   58],
     | 70.00th=[   63], 80.00th=[  101], 90.00th=[  110], 95.00th=[  118],
     | 99.00th=[  161], 99.50th=[  174], 99.90th=[  182], 99.95th=[  184],
     | 99.99th=[  203]
   bw (  KiB/s): min= 4096, max=22528, per=100.00%, avg=15253.54, stdev=5213.43, samples=687
   iops        : min=    4, max=   22, avg=14.88, stdev= 5.09, samples=687
  lat (msec)   : 50=27.91%, 100=52.15%, 250=19.94%
  cpu          : usr=0.68%, sys=85.31%, ctx=13937, majf=5123, minf=1305866
  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=14.9MiB/s (15.6MB/s), 14.9MiB/s-14.9MiB/s (15.6MB/s-15.6MB/s), io=5120MiB (5369MB), run=344750-344750msec