From e157fd63cb5dd059d64bcde538f2c0f3f7343c22 Mon Sep 17 00:00:00 2001
From: Kevin Backhouse <kevinbackhouse@github.com>
Date: Tue, 13 Jul 2021 13:13:45 +0100
Subject: [PATCH] Add -workers option to use all cores.

---
 .github/workflows/on_PR_linux_fuzz.yml | 2 +-
 README.md                              | 5 +++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/on_PR_linux_fuzz.yml b/.github/workflows/on_PR_linux_fuzz.yml
index 8f02eac3f2..9fb1e5b212 100644
--- a/.github/workflows/on_PR_linux_fuzz.yml
+++ b/.github/workflows/on_PR_linux_fuzz.yml
@@ -27,4 +27,4 @@ jobs:
       run: |
         cd build
         mkdir corpus
-        ./bin/fuzz-read-print-write corpus ../test/data/ -jobs=$(nproc) -max_total_time=60 -max_len=4096
+        ./bin/fuzz-read-print-write corpus ../test/data/ -jobs=$(nproc) -workers=$(nproc) -max_total_time=120 -max_len=4096
diff --git a/README.md b/README.md
index b7217b4d18..f0ae44a2df 100644
--- a/README.md
+++ b/README.md
@@ -1056,11 +1056,12 @@ $ cmake .. -DCMAKE_CXX_COMPILER=$(which clang++) -DEXIV2_BUILD_FUZZ_TESTS=ON -DE
 $ cmake --build .
 ```
 
-To execute the fuzzers:
+To execute a fuzzer:
 
 ```bash
 cd <exiv2dir>/build-fuzz
-bin/<fuzzer_name> # for example ./bin/read-metadata.cpp
+mkdir corpus
+./bin/fuzz-read-print-write corpus ../test/data/ -jobs=$(nproc) -workers=$(nproc) -max_len=4096
 ```
 
 [TOC](#TOC)