speed up notebook 4

Author: Collin Capano

tutorial/inference_4_bbh_example/IntroToPyCBCInference.ipynb

@@ -269,10 +269,10 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "if not os.path.exists('H-H1_GWOSC_16KHZ_R1-1126257415-4096.gwf'):\n",
-    "    !wget https://www.gw-openscience.org/catalog/GWTC-1-confident/data/GW150914/H-H1_GWOSC_16KHZ_R1-1126257415-4096.gwf\n",
-    "if not os.path.exists('L-L1_GWOSC_16KHZ_R1-1126257415-4096.gwf'):\n",
-    "    !wget https://www.gw-openscience.org/catalog/GWTC-1-confident/data/GW150914/L-L1_GWOSC_16KHZ_R1-1126257415-4096.gwf"
+    "if not os.path.exists('H-H1_GWOSC_4KHZ_R1-1126257415-4096.gwf'):\n",
+    "    !wget https://www.gw-openscience.org/catalog/GWTC-1-confident/data/GW150914/H-H1_GWOSC_4KHZ_R1-1126257415-4096.gwf\n",
+    "if not os.path.exists('L-L1_GWOSC_4KHZ_R1-1126257415-4096.gwf'):\n",
+    "    !wget https://www.gw-openscience.org/catalog/GWTC-1-confident/data/GW150914/L-L1_GWOSC_4KHZ_R1-1126257415-4096.gwf"
    ]
   },
   {

tutorial/inference_4_bbh_example/data.ini

@@ -15,8 +15,8 @@ psd-segment-stride = 4
 ; The frame files must be downloaded from GWOSC before running. Here, we
 ; assume that the files have been downloaded to the same directory. Adjust
 ; the file path as necessary if not.
-frame-files = H1:H-H1_GWOSC_16KHZ_R1-1126257415-4096.gwf L1:L-L1_GWOSC_16KHZ_R1-1126257415-4096.gwf
-channel-name = H1:GWOSC-16KHZ_R1_STRAIN L1:GWOSC-16KHZ_R1_STRAIN
+frame-files = H1:H-H1_GWOSC_4KHZ_R1-1126257415-4096.gwf L1:L-L1_GWOSC_4KHZ_R1-1126257415-4096.gwf
+channel-name = H1:GWOSC-4KHZ_R1_STRAIN L1:GWOSC-4KHZ_R1_STRAIN
 ; this will cause the data to be resampled to 2048 Hz:
 sample-rate = 2048
 ; We'll use a high-pass filter so as not to get numerical errors from the large

tutorial/inference_4_bbh_example/emcee_pt-gw150914_like.ini

@@ -1,9 +1,11 @@
 [sampler]
 name = emcee_pt
-nwalkers = 200
-ntemps = 20
+; for GW problems, its usually best to use 200 walkers and 20 temps;
+; here, we've reduced that just for a test
+nwalkers = 100
+ntemps = 2
 effective-nsamples = 1000
-checkpoint-interval = 2000
+checkpoint-interval = 1000
 max-samples-per-chain = 1000
 
 [sampler-burn_in]

tutorial/inference_4_bbh_example/run.sh

@@ -9,7 +9,7 @@ OUTPUT_PATH=bbh_results.hdf
 
 # the following sets the number of cores to use; adjust as needed to
 # your computer's capabilities
-NPROCS=8
+NPROCS=1
 
 # run sampler
 # Running with OMP_NUM_THREADS=1 stops lalsimulation