[PATCH] INSTALL: minor typo fix
Signed-off-by: Alexander Kuleshov kuleshovm...@gmail.com --- INSTALL | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/INSTALL b/INSTALL index ffb071e..6f1c3d5 100644 --- a/INSTALL +++ b/INSTALL @@ -53,7 +53,7 @@ or As a caveat: a profile-optimized build takes a *lot* longer since the git tree must be built twice, and in order for the profiling -measurements to work properly, ccache must be disabled and the test +measurements to work properly, cache must be disabled and the test suite has to be run using only a single CPU. In addition, the profile feedback build stage currently generates a lot of additional compiler warnings. -- 2.3.0-rc1 -- To unsubscribe from this list: send the line unsubscribe git in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH] INSTALL: minor typo fix
On Wed, Jan 28, 2015 at 6:09 AM, Chris Packham judge.pack...@gmail.com wrote: Hi Alexander On Wed, Jan 28, 2015 at 5:15 AM, Alexander Kuleshov kuleshovm...@gmail.com wrote: Signed-off-by: Alexander Kuleshov kuleshovm...@gmail.com --- INSTALL | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/INSTALL b/INSTALL index ffb071e..6f1c3d5 100644 --- a/INSTALL +++ b/INSTALL @@ -53,7 +53,7 @@ or As a caveat: a profile-optimized build takes a *lot* longer since the git tree must be built twice, and in order for the profiling -measurements to work properly, ccache must be disabled and the test +measurements to work properly, cache must be disabled and the test suite has to be run using only a single CPU. In addition, the profile feedback build stage currently generates a lot of additional compiler warnings. -- That's not a typo ccache[1] is a compiler cache tool that can be used to speed up rebuilding object files. I don't know anything about the profile enabled builds but I imagine it has something to do with needing the 2nd build to produce difference object files from the s/difference/different/ first (with ccache enabled I imagine the 2nd build would result in identical output since on source files are changed between builds). -- [1] - https://ccache.samba.org/ The commit that added that note f2d713fc[1] has a bit more of an explanation of why profile enabled builds and ccache are incompatible. [1] - https://github.com/git/git/commit/f2d713fc3e8e0b7be89584f04b421808aa99c403 -- To unsubscribe from this list: send the line unsubscribe git in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH] INSTALL: minor typo fix
Hi Alexander On Wed, Jan 28, 2015 at 5:15 AM, Alexander Kuleshov kuleshovm...@gmail.com wrote: Signed-off-by: Alexander Kuleshov kuleshovm...@gmail.com --- INSTALL | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/INSTALL b/INSTALL index ffb071e..6f1c3d5 100644 --- a/INSTALL +++ b/INSTALL @@ -53,7 +53,7 @@ or As a caveat: a profile-optimized build takes a *lot* longer since the git tree must be built twice, and in order for the profiling -measurements to work properly, ccache must be disabled and the test +measurements to work properly, cache must be disabled and the test suite has to be run using only a single CPU. In addition, the profile feedback build stage currently generates a lot of additional compiler warnings. -- That's not a typo ccache[1] is a compiler cache tool that can be used to speed up rebuilding object files. I don't know anything about the profile enabled builds but I imagine it has something to do with needing the 2nd build to produce difference object files from the first (with ccache enabled I imagine the 2nd build would result in identical output since on source files are changed between builds). -- [1] - https://ccache.samba.org/ -- To unsubscribe from this list: send the line unsubscribe git in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH] INSTALL: minor typo fix
On Wed, Jan 28, 2015 at 06:09:52AM +1300, Chris Packham wrote: On Wed, Jan 28, 2015 at 5:15 AM, Alexander Kuleshov kuleshovm...@gmail.com wrote: Signed-off-by: Alexander Kuleshov kuleshovm...@gmail.com --- INSTALL | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/INSTALL b/INSTALL index ffb071e..6f1c3d5 100644 --- a/INSTALL +++ b/INSTALL @@ -53,7 +53,7 @@ or As a caveat: a profile-optimized build takes a *lot* longer since the git tree must be built twice, and in order for the profiling -measurements to work properly, ccache must be disabled and the test +measurements to work properly, cache must be disabled and the test suite has to be run using only a single CPU. In addition, the profile feedback build stage currently generates a lot of additional compiler warnings. -- That's not a typo ccache[1] is a compiler cache tool that can be used to speed up rebuilding object files. I don't know anything about the profile enabled builds but I imagine it has something to do with needing the 2nd build to produce difference object files from the first (with ccache enabled I imagine the 2nd build would result in identical output since on source files are changed between builds). Yes, ccache creates a cache key for each file based on the command line flags to the compiler, and the output of the pre-processor when run on the file. The profiling data generated by the first run is outside of what ccache knows about, so it can't include that information in its cache key (and consequently, we get false cache hits). So yeah. Not a typo. -Peff -- To unsubscribe from this list: send the line unsubscribe git in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
