* [PATCH] genboardscfg: limit to 240 jobs
@ 2022-01-11 15:34 Andre Przywara
2022-01-11 15:48 ` Heinrich Schuchardt
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Andre Przywara @ 2022-01-11 15:34 UTC (permalink / raw)
To: Tom Rini, Simon Glass; +Cc: u-boot, Heinrich Schuchardt
When genboardscfg.py is run on machines with 255 or more cores, the
process will consume more than 1024 file descriptors, which is a common
standard ulimit for user processes. As a consequence it will fail with a
lenghty Python trace, with the almost hidden message:
OSError: [Errno 24] Too many open files
It's somewhat questionable whether that level of parallelity is actually
useful for genboardscfg, so we limit the *default* number of jobs to the
safe number of 240, to avoid the problem.
If a user persists, she can still force a higher number via the -j
parameter - hopefully having raised the ulimit accordingly beforehand.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
---
tools/genboardscfg.py | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/genboardscfg.py b/tools/genboardscfg.py
index 4ee7aa1f89..07bf681d1d 100755
--- a/tools/genboardscfg.py
+++ b/tools/genboardscfg.py
@@ -430,7 +430,7 @@ def main():
# Add options here
parser.add_option('-f', '--force', action="store_true", default=False,
help='regenerate the output even if it is new')
- parser.add_option('-j', '--jobs', type='int', default=cpu_count,
+ parser.add_option('-j', '--jobs', type='int', default=min(cpu_count, 240),
help='the number of jobs to run simultaneously')
parser.add_option('-o', '--output', default=OUTPUT_FILE,
help='output file [default=%s]' % OUTPUT_FILE)
--
2.25.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] genboardscfg: limit to 240 jobs
2022-01-11 15:34 [PATCH] genboardscfg: limit to 240 jobs Andre Przywara
@ 2022-01-11 15:48 ` Heinrich Schuchardt
2022-01-12 20:04 ` Simon Glass
2022-01-13 18:00 ` Simon Glass
2 siblings, 0 replies; 4+ messages in thread
From: Heinrich Schuchardt @ 2022-01-11 15:48 UTC (permalink / raw)
To: Andre Przywara; +Cc: u-boot, Tom Rini, Simon Glass
On 1/11/22 16:34, Andre Przywara wrote:
> When genboardscfg.py is run on machines with 255 or more cores, the
> process will consume more than 1024 file descriptors, which is a common
> standard ulimit for user processes. As a consequence it will fail with a
> lenghty Python trace, with the almost hidden message:
> OSError: [Errno 24] Too many open files
>
> It's somewhat questionable whether that level of parallelity is actually
> useful for genboardscfg, so we limit the *default* number of jobs to the
> safe number of 240, to avoid the problem.
> If a user persists, she can still force a higher number via the -j
Nits:
%s/persists/insists/
%s/she/they/ if you don't specifically mean a female user.
Otherwise
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
> parameter - hopefully having raised the ulimit accordingly beforehand.
>
> Signed-off-by: Andre Przywara <andre.przywara@arm.com>
> ---
> tools/genboardscfg.py | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/genboardscfg.py b/tools/genboardscfg.py
> index 4ee7aa1f89..07bf681d1d 100755
> --- a/tools/genboardscfg.py
> +++ b/tools/genboardscfg.py
> @@ -430,7 +430,7 @@ def main():
> # Add options here
> parser.add_option('-f', '--force', action="store_true", default=False,
> help='regenerate the output even if it is new')
> - parser.add_option('-j', '--jobs', type='int', default=cpu_count,
> + parser.add_option('-j', '--jobs', type='int', default=min(cpu_count, 240),
> help='the number of jobs to run simultaneously')
> parser.add_option('-o', '--output', default=OUTPUT_FILE,
> help='output file [default=%s]' % OUTPUT_FILE)
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] genboardscfg: limit to 240 jobs
2022-01-11 15:34 [PATCH] genboardscfg: limit to 240 jobs Andre Przywara
2022-01-11 15:48 ` Heinrich Schuchardt
@ 2022-01-12 20:04 ` Simon Glass
2022-01-13 18:00 ` Simon Glass
2 siblings, 0 replies; 4+ messages in thread
From: Simon Glass @ 2022-01-12 20:04 UTC (permalink / raw)
To: Andre Przywara; +Cc: Tom Rini, U-Boot Mailing List, Heinrich Schuchardt
On Tue, 11 Jan 2022 at 08:35, Andre Przywara <andre.przywara@arm.com> wrote:
>
> When genboardscfg.py is run on machines with 255 or more cores, the
> process will consume more than 1024 file descriptors, which is a common
> standard ulimit for user processes. As a consequence it will fail with a
> lenghty Python trace, with the almost hidden message:
> OSError: [Errno 24] Too many open files
>
> It's somewhat questionable whether that level of parallelity is actually
> useful for genboardscfg, so we limit the *default* number of jobs to the
> safe number of 240, to avoid the problem.
> If a user persists, she can still force a higher number via the -j
> parameter - hopefully having raised the ulimit accordingly beforehand.
>
> Signed-off-by: Andre Przywara <andre.przywara@arm.com>
> ---
> tools/genboardscfg.py | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Reviewed-by: Simon Glass <sjg@chromium.org>
Please send such machine. Thank you.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] genboardscfg: limit to 240 jobs
2022-01-11 15:34 [PATCH] genboardscfg: limit to 240 jobs Andre Przywara
2022-01-11 15:48 ` Heinrich Schuchardt
2022-01-12 20:04 ` Simon Glass
@ 2022-01-13 18:00 ` Simon Glass
2 siblings, 0 replies; 4+ messages in thread
From: Simon Glass @ 2022-01-13 18:00 UTC (permalink / raw)
To: Simon Glass
Cc: Tom Rini, U-Boot Mailing List, Heinrich Schuchardt, Andre Przywara
On Tue, 11 Jan 2022 at 08:35, Andre Przywara <andre.przywara@arm.com> wrote:
>
> When genboardscfg.py is run on machines with 255 or more cores, the
> process will consume more than 1024 file descriptors, which is a common
> standard ulimit for user processes. As a consequence it will fail with a
> lenghty Python trace, with the almost hidden message:
> OSError: [Errno 24] Too many open files
>
> It's somewhat questionable whether that level of parallelity is actually
> useful for genboardscfg, so we limit the *default* number of jobs to the
> safe number of 240, to avoid the problem.
> If a user persists, she can still force a higher number via the -j
> parameter - hopefully having raised the ulimit accordingly beforehand.
>
> Signed-off-by: Andre Przywara <andre.przywara@arm.com>
> ---
> tools/genboardscfg.py | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Reviewed-by: Simon Glass <sjg@chromium.org>
Please send such machine. Thank you.
Applied to u-boot-dm, thanks!
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2022-01-13 18:02 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-01-11 15:34 [PATCH] genboardscfg: limit to 240 jobs Andre Przywara
2022-01-11 15:48 ` Heinrich Schuchardt
2022-01-12 20:04 ` Simon Glass
2022-01-13 18:00 ` Simon Glass
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.